ecos-v3_0-branch: packages/kernel/current/src/sched/mlqueue.cxx annotate

annotate packages/kernel/current/src/sched/mlqueue.cxx @ 2863:7d8c61e6225c default tip

* Added execute permissions to files missed in conversion from CVS

author	alexs
date	Thu, 26 Mar 2009 20:39:18 +0000
parents	74dbf4c3f2e1
children

rev	line source
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	1 //==========================================================================
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	2 //
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	3 // sched/mlqueue.cxx
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	4 //
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	5 // Multi-level queue scheduler class implementation
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	6 //
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	7 //==========================================================================
2729 74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	8 // ####ECOSGPLCOPYRIGHTBEGIN####
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	9 // -------------------------------------------
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	10 // This file is part of eCos, the Embedded Configurable Operating System.
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 197 diff changeset	12 //
2729 74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	13 // eCos is free software; you can redistribute it and/or modify it under
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	14 // the terms of the GNU General Public License as published by the Free
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	15 // Software Foundation; either version 2 or (at your option) any later
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	16 // version.
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 197 diff changeset	17 //
2729 74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	18 // eCos is distributed in the hope that it will be useful, but WITHOUT
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	19 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	21 // for more details.
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 197 diff changeset	22 //
2729 74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	23 // You should have received a copy of the GNU General Public License
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	24 // along with eCos; if not, write to the Free Software Foundation, Inc.,
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	25 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 197 diff changeset	26 //
2729 74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	27 // As a special exception, if other files instantiate templates or use
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	28 // macros or inline functions from this file, or you compile this file
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	29 // and link it with other works to produce a work based on this file,
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	30 // this file does not by itself cause the resulting work to be covered by
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	31 // the GNU General Public License. However the source code for this file
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	32 // must still be made available in accordance with section (3) of the GNU
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	33 // General Public License v2.
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 197 diff changeset	34 //
2729 74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	35 // This exception does not invalidate any other reasons why a work based
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	36 // on this file might be covered by the GNU General Public License.
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	37 // -------------------------------------------
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 2348 diff changeset	38 // ####ECOSGPLCOPYRIGHTEND####
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	39 //==========================================================================
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	40 //#####DESCRIPTIONBEGIN####
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	41 //
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	42 // Author(s): nickg
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	43 // Contributors: jlarmour
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	44 // Date: 1999-02-17
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	45 // Purpose: Multilevel queue scheduler class implementation
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	46 // Description: This file contains the implementations of
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	47 // Cyg_Scheduler_Implementation and
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	48 // Cyg_SchedThread_Implementation.
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	49 //
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	50 //
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	51 //####DESCRIPTIONEND####
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	52 //
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	53 //==========================================================================
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	54
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	55 #include <pkgconf/kernel.h>
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	56
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	57 #include <cyg/kernel/ktypes.h> // base kernel types
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	58 #include <cyg/infra/cyg_trac.h> // tracing macros
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	59 #include <cyg/infra/cyg_ass.h> // assertion macros
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	60
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	61 #include <cyg/kernel/sched.hxx> // our header
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	62
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	63 #include <cyg/hal/hal_arch.h> // Architecture specific definitions
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	64
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	65 #include <cyg/kernel/thread.inl> // thread inlines
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	66 #include <cyg/kernel/sched.inl> // scheduler inlines
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	67
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	68 #ifdef CYGSEM_KERNEL_SCHED_MLQUEUE
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	69
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	70 //==========================================================================
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	71 // Cyg_Scheduler_Implementation class static members
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	72
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	73 #ifdef CYGSEM_KERNEL_SCHED_TIMESLICE
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	74
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	75 cyg_ucount32 Cyg_Scheduler_Implementation::timeslice_count[CYGNUM_KERNEL_CPU_MAX];
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	76
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	77 #endif
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	78
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	79
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	80 //==========================================================================
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	81 // Cyg_Scheduler_Implementation class members
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	82
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	83 // -------------------------------------------------------------------------
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	84 // Constructor.
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	85
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	86 Cyg_Scheduler_Implementation::Cyg_Scheduler_Implementation()
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	87 {
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	88 CYG_REPORT_FUNCTION();
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	89
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	90 queue_map = 0;
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	91
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	92 #ifdef CYGPKG_KERNEL_SMP_SUPPORT
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	93
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	94 pending_map = 0;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	95
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	96 for( int i = 0; i < CYGNUM_KERNEL_SCHED_PRIORITIES; i++ )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	97 pending[i] = 0;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	98
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	99 #endif
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	100
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	101 for( int i = 0; i < CYGNUM_KERNEL_CPU_MAX; i++ )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	102 {
182 f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 179 diff changeset	103 #ifdef CYGSEM_KERNEL_SCHED_TIMESLICE
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	104 timeslice_count[i] = CYGNUM_KERNEL_SCHED_TIMESLICE_TICKS;
182 f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 179 diff changeset	105 #endif
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	106 need_reschedule[i] = true;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	107 }
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	108
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	109 CYG_REPORT_RETURN();
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	110 }
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	111
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	112 // -------------------------------------------------------------------------
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	113 // Choose the best thread to run next
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	114
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	115 Cyg_Thread *
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	116 Cyg_Scheduler_Implementation::schedule(void)
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	117 {
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	118 CYG_REPORT_FUNCTYPE("returning thread %08x");
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	119
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	120 // The run queue may _never_ be empty, there is always
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	121 // an idle thread at the lowest priority.
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	122
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	123 CYG_ASSERT( queue_map != 0, "Run queue empty");
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	124 CYG_ASSERT( queue_map & (1<<CYG_THREAD_MIN_PRIORITY), "Idle thread vanished!!!");
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	125 CYG_ASSERT( !run_queue[CYG_THREAD_MIN_PRIORITY].empty(), "Idle thread vanished!!!");
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	126
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	127 #ifdef CYGPKG_KERNEL_SMP_SUPPORT
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	128
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	129 Cyg_Thread *current = get_current_thread();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	130 register cyg_uint32 index;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	131
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	132 CYG_ASSERT( current->cpu != CYG_KERNEL_CPU_NONE, "Current thread does not have CPU set!");
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	133
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	134 // If the current thread is still runnable, return it to pending
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	135 // state so that it can be considered alongside any other threads
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	136 // for execution.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	137 if( current->get_state() == Cyg_Thread::RUNNING )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	138 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	139 current->cpu = CYG_KERNEL_CPU_NONE;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	140 pending[current->priority]++;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	141 pending_map \|= (1<<current->priority);
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	142 }
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	143 else
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	144 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	145 // Otherwise, ensure that the thread is no longer marked as
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	146 // running.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	147 current->cpu = CYG_KERNEL_CPU_NONE;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	148 }
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	149
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	150
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	151 HAL_LSBIT_INDEX(index, pending_map);
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	152
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	153 Cyg_RunQueue *queue = &run_queue[index];
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	154
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	155 CYG_ASSERT( !queue->empty(), "Queue for index empty");
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	156 CYG_ASSERT( pending[index] > 0, "Pending array and map disagree");
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	157
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	158 Cyg_Thread *thread = queue->get_head();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	159
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	160 // We know there is a runnable thread in this queue, If the thread
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	161 // we got is not it, scan until we find it. While not constant time,
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	162 // this search has an upper bound of the number of CPUs in the system.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	163
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	164 while( thread->cpu != CYG_KERNEL_CPU_NONE )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	165 thread = thread->get_next();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	166
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	167 // Take newly scheduled thread out of pending map
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	168 thread->cpu = CYG_KERNEL_CPU_THIS();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	169 if( --pending[index] == 0 )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	170 pending_map &= ~(1<<index);
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	171
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	172 #else
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	173
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	174 register cyg_uint32 index;
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	175
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	176 HAL_LSBIT_INDEX(index, queue_map);
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	177
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	178 Cyg_RunQueue *queue = &run_queue[index];
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	179
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	180 CYG_ASSERT( !queue->empty(), "Queue for index empty");
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	181
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	182 Cyg_Thread *thread = queue->get_head();
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	183
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	184 #endif
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	185
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	186 CYG_INSTRUMENT_MLQ( SCHEDULE, thread, index);
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	187
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	188 CYG_ASSERT( thread != NULL , "No threads in run queue");
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	189 CYG_ASSERT( thread->queue == NULL , "Runnable thread on a queue!");
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	190
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	191 CYG_REPORT_RETVAL(thread);
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	192
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	193 return thread;
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	194 }
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	195
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	196 // -------------------------------------------------------------------------
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	197
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	198 void
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	199 Cyg_Scheduler_Implementation::add_thread(Cyg_Thread *thread)
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	200 {
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	201 CYG_REPORT_FUNCTION();
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	202 CYG_REPORT_FUNCARG1("thread=%08x", thread);
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	203
124 0ec04793409a Merge from eCos master repository on 2000-09-11-03:00:13-BST jlarmour parents: 115 diff changeset	204 cyg_priority pri = thread->priority;
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	205 Cyg_RunQueue *queue = &run_queue[pri];
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	206
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	207 CYG_INSTRUMENT_MLQ( ADD, thread, pri);
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	208
46 797268ecc331 Merge from eCos master repository on 1999-10-19-18:55:31-BST jlarmour parents: 2 diff changeset	209 CYG_ASSERT((CYG_THREAD_MIN_PRIORITY >= pri)
797268ecc331 Merge from eCos master repository on 1999-10-19-18:55:31-BST jlarmour parents: 2 diff changeset	210 && (CYG_THREAD_MAX_PRIORITY <= pri),
797268ecc331 Merge from eCos master repository on 1999-10-19-18:55:31-BST jlarmour parents: 2 diff changeset	211 "Priority out of range!");
797268ecc331 Merge from eCos master repository on 1999-10-19-18:55:31-BST jlarmour parents: 2 diff changeset	212
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	213 CYG_ASSERT( ((queue_map & (1<<pri))!=0) == ((!run_queue[pri].empty())!=0), "Map and queue disagree");
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	214
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	215 // If the thread is on some other queue, remove it
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	216 // here.
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	217 if( thread->queue != NULL )
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	218 {
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	219 thread->queue->remove(thread);
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	220 }
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	221
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	222 if( queue->empty() )
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	223 {
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	224 // set the map bit and ask for a reschedule if this is a
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	225 // new highest priority thread.
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	226
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	227 queue_map \|= (1<<pri);
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	228
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	229 }
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	230 // else the queue already has an occupant, queue behind him
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	231
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	232 queue->add_tail(thread);
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	233
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	234 // If the new thread is higher priority than any
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	235 // current thread, request a reschedule.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	236
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	237 set_need_reschedule(thread);
2348 73a01c1a35ba * src/sched/mlqueue.cxx (add_thread, yield): nickg parents: 1766 diff changeset	238
73a01c1a35ba * src/sched/mlqueue.cxx (add_thread, yield): nickg parents: 1766 diff changeset	239 // Also reset the timeslice_count so that this thread gets a full
73a01c1a35ba * src/sched/mlqueue.cxx (add_thread, yield): nickg parents: 1766 diff changeset	240 // timeslice once it begins to run.
73a01c1a35ba * src/sched/mlqueue.cxx (add_thread, yield): nickg parents: 1766 diff changeset	241
73a01c1a35ba * src/sched/mlqueue.cxx (add_thread, yield): nickg parents: 1766 diff changeset	242 thread->timeslice_reset();
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	243
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	244 #ifdef CYGPKG_KERNEL_SMP_SUPPORT
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	245
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	246 // If the thread is not currently running, increment the pending
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	247 // count for the priority, and if necessary set the bit in the
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	248 // pending map.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	249
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	250 if( thread->cpu == CYG_KERNEL_CPU_NONE )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	251 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	252 if( pending[pri]++ == 0 )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	253 pending_map \|= (1<<pri);
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	254 }
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	255 // Otherwise the pending count will be dealt with in schedule().
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	256
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	257 #endif
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	258
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	259 CYG_ASSERT( thread->queue == NULL , "Runnable thread on a queue!");
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	260 CYG_ASSERT( queue_map != 0, "Run queue empty");
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	261 CYG_ASSERT( queue_map & (1<<pri), "Queue map bit not set for pri");
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	262 CYG_ASSERT( !run_queue[pri].empty(), "Queue for pri empty");
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	263 CYG_ASSERT( ((queue_map & (1<<pri))!=0) == ((!run_queue[pri].empty())!=0), "Map and queue disagree");
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	264 CYG_ASSERT( queue_map & (1<<CYG_THREAD_MIN_PRIORITY), "Idle thread vanished!!!");
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	265 CYG_ASSERT( !run_queue[CYG_THREAD_MIN_PRIORITY].empty(), "Idle thread vanished!!!");
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	266
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	267 CYG_REPORT_RETURN();
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	268 }
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	269
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	270 // -------------------------------------------------------------------------
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	271
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	272 void
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	273 Cyg_Scheduler_Implementation::rem_thread(Cyg_Thread *thread)
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	274 {
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	275 CYG_REPORT_FUNCTION();
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	276 CYG_REPORT_FUNCARG1("thread=%08x", thread);
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	277
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	278 CYG_ASSERT( queue_map != 0, "Run queue empty");
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	279
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	280 cyg_priority pri = thread->priority;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	281 Cyg_RunQueue *queue = &run_queue[pri];
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	282
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	283 CYG_INSTRUMENT_MLQ( REM, thread, pri);
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	284
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	285 CYG_ASSERT( pri != CYG_THREAD_MIN_PRIORITY, "Idle thread trying to sleep!");
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	286 CYG_ASSERT( !run_queue[CYG_THREAD_MIN_PRIORITY].empty(), "Idle thread vanished!!!");
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	287
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	288 #ifdef CYGPKG_KERNEL_SMP_SUPPORT
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	289
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	290 if( thread->cpu == CYG_KERNEL_CPU_NONE )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	291 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	292 // If the thread is not running, then we need to adjust the
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	293 // pending count array and map if necessary.
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	294
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	295 if( --pending[pri] == 0 )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	296 pending_map &= ~(1<<pri);
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	297 }
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	298 else
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	299 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	300 // If the target thread is currently running on a different
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	301 // CPU, send a reschedule interrupt there to deschedule it.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	302 if( thread->cpu != CYG_KERNEL_CPU_THIS() )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	303 CYG_KERNEL_CPU_RESCHEDULE_INTERRUPT( thread->cpu, 0 );
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	304 }
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	305 // If the thread is current running on this CPU, then the pending
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	306 // count will be dealt with in schedule().
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	307
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	308 #endif
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	309
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	310 CYG_ASSERT( queue_map & (1<<pri), "Queue map bit not set for pri");
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	311 CYG_ASSERT( !run_queue[pri].empty(), "Queue for pri empty");
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	312
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	313 // remove thread from queue
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	314 queue->remove(thread);
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	315
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	316 if( queue->empty() )
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	317 {
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	318 // If this was only thread in
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	319 // queue, clear map.
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	320
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	321 queue_map &= ~(1<<pri);
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	322 }
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	323
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	324 CYG_ASSERT( queue_map != 0, "Run queue empty");
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	325 CYG_ASSERT( queue_map & (1<<CYG_THREAD_MIN_PRIORITY), "Idle thread vanished!!!");
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	326 CYG_ASSERT( !run_queue[CYG_THREAD_MIN_PRIORITY].empty(), "Idle thread vanished!!!");
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	327 CYG_ASSERT( ((queue_map & (1<<pri))!=0) == ((!run_queue[pri].empty())!=0), "Map and queue disagree");
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	328
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	329 CYG_REPORT_RETURN();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	330 }
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	331
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	332 // -------------------------------------------------------------------------
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	333 // Set the need_reschedule flag
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	334 // This function overrides the definition in Cyg_Scheduler_Base and tests
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	335 // for a reschedule condition based on the priorities of the given thread
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	336 // and the current thread(s).
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	337
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	338 void Cyg_Scheduler_Implementation::set_need_reschedule(Cyg_Thread *thread)
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	339 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	340 #ifndef CYGPKG_KERNEL_SMP_SUPPORT
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	341
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	342 if( current_thread[0]->priority > thread->priority \|\|
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	343 current_thread[0]->get_state() != Cyg_Thread::RUNNING )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	344 need_reschedule[0] = true;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	345
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	346 #else
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	347
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	348 HAL_SMP_CPU_TYPE cpu_this = CYG_KERNEL_CPU_THIS();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	349 HAL_SMP_CPU_TYPE cpu_count = CYG_KERNEL_CPU_COUNT();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	350
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	351 // Start with current CPU. If we can do the job locally then
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	352 // that is most efficient. Only go on to other CPUs if that is
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	353 // not possible.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	354
182 f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 179 diff changeset	355 for(int i = 0; i < cpu_count; i++)
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	356 {
182 f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 179 diff changeset	357 HAL_SMP_CPU_TYPE cpu = (i + cpu_this) % cpu_count;
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 179 diff changeset	358
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	359 // If a CPU is not already marked for rescheduling, and its
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	360 // current thread is of lower priority than _thread_, then
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	361 // set its need_reschedule flag.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	362
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	363 Cyg_Thread *cur = current_thread[cpu];
182 f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 179 diff changeset	364
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 179 diff changeset	365 if( (!need_reschedule[cpu]) &&
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	366 (cur->priority > thread->priority)
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	367 )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	368 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	369 need_reschedule[cpu] = true;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	370
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	371 if( cpu != cpu_this )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	372 {
182 f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 179 diff changeset	373 // All processors other than this one need to be sent
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 179 diff changeset	374 // a reschedule interrupt.
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 179 diff changeset	375
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	376 CYG_INSTRUMENT_SMP( RESCHED_SEND, cpu, 0 );
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	377 CYG_KERNEL_CPU_RESCHEDULE_INTERRUPT( cpu, 0 );
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	378 }
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	379
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	380 // Having notionally rescheduled _thread_ onto the cpu, we
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	381 // now see if we can reschedule the former current thread of
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	382 // that CPU onto another.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	383
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	384 thread = cur;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	385 }
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	386 }
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	387
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	388 #endif
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	389 }
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	390
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	391 // -------------------------------------------------------------------------
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	392 // Set up initial idle thread
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	393
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	394 void Cyg_Scheduler_Implementation::set_idle_thread( Cyg_Thread *thread, HAL_SMP_CPU_TYPE cpu )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	395 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	396 // Make the thread the current thread for this CPU.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	397
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	398 current_thread[cpu] = thread;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	399
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	400 // This will insert the thread in the run queues and make it
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	401 // available to execute.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	402 thread->resume();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	403
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	404 #ifdef CYGPKG_KERNEL_SMP_SUPPORT
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	405
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	406 thread->cpu = cpu;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	407
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	408 // In SMP, we need to take this thread out of the pending array
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	409 // and map.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	410
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	411 cyg_priority pri = thread->priority;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	412 if( --pending[pri] == 0 )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	413 pending_map &= ~(1<<pri);
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	414 #endif
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	415
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	416 }
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	417
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	418 // -------------------------------------------------------------------------
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	419 // register thread with scheduler
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	420
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	421 void
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	422 Cyg_Scheduler_Implementation::register_thread(Cyg_Thread *thread)
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	423 {
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	424 CYG_REPORT_FUNCTION();
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	425 CYG_REPORT_FUNCARG1("thread=%08x", thread);
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	426 // No registration necessary in this scheduler
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	427 CYG_REPORT_RETURN();
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	428 }
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	429
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	430 // -------------------------------------------------------------------------
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	431
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	432 // deregister thread
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	433 void
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	434 Cyg_Scheduler_Implementation::deregister_thread(Cyg_Thread *thread)
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	435 {
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	436 CYG_REPORT_FUNCTION();
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	437 CYG_REPORT_FUNCARG1("thread=%08x", thread);
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	438 // No registration necessary in this scheduler
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	439 CYG_REPORT_RETURN();
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	440 }
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	441
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	442 // -------------------------------------------------------------------------
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	443 // Test the given priority for uniqueness
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	444
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	445 cyg_bool
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	446 Cyg_Scheduler_Implementation::unique( cyg_priority priority)
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	447 {
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	448 CYG_REPORT_FUNCTYPE("returning %d");
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	449 CYG_REPORT_FUNCARG1("priority=%d", priority);
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	450 // Priorities are not unique
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	451 CYG_REPORT_RETVAL(true);
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	452 return true;
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	453 }
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	454
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	455 //==========================================================================
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	456 // Support for timeslicing option
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	457
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	458 #ifdef CYGSEM_KERNEL_SCHED_TIMESLICE
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	459
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	460 // -------------------------------------------------------------------------
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	461
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	462 void
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	463 Cyg_Scheduler_Implementation::timeslice(void)
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	464 {
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	465 #ifdef CYGDBG_KERNEL_TRACE_TIMESLICE
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	466 CYG_REPORT_FUNCTION();
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	467 #endif
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	468
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	469 #ifdef CYGPKG_KERNEL_SMP_SUPPORT
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	470
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	471 HAL_SMP_CPU_TYPE cpu;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	472 HAL_SMP_CPU_TYPE cpu_count = CYG_KERNEL_CPU_COUNT();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	473 HAL_SMP_CPU_TYPE cpu_this = CYG_KERNEL_CPU_THIS();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	474
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	475 for( cpu = 0; cpu < cpu_count; cpu++ )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	476 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	477 if( --timeslice_count[cpu] == 0 )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	478 if( cpu == cpu_this )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	479 timeslice_cpu();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	480 else CYG_KERNEL_CPU_TIMESLICE_INTERRUPT( cpu, 0 );
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	481 }
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	482
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	483 #else
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	484
179 391299f9e541 Merge from eCos master repository on 2001-08-17-16:31:54-BST jlarmour parents: 177 diff changeset	485 if( --timeslice_count[CYG_KERNEL_CPU_THIS()] == 0 )
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	486 timeslice_cpu();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	487
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	488 #endif
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	489
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	490 #ifdef CYGDBG_KERNEL_TRACE_TIMESLICE
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	491 CYG_REPORT_RETURN();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	492 #endif
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	493 }
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	494
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	495 // -------------------------------------------------------------------------
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	496
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	497 void
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	498 Cyg_Scheduler_Implementation::timeslice_cpu(void)
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	499 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	500 #ifdef CYGDBG_KERNEL_TRACE_TIMESLICE
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	501 CYG_REPORT_FUNCTION();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	502 #endif
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	503
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	504 Cyg_Thread *thread = get_current_thread();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	505 HAL_SMP_CPU_TYPE cpu_this = CYG_KERNEL_CPU_THIS();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	506
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	507 CYG_ASSERT( queue_map != 0, "Run queue empty");
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	508 CYG_ASSERT( queue_map & (1<<CYG_THREAD_MIN_PRIORITY), "Idle thread vanished!!!");
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	509
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	510 #ifdef CYGSEM_KERNEL_SCHED_TIMESLICE_ENABLE
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	511 if( thread->timeslice_enabled &&
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	512 timeslice_count[cpu_this] == 0 )
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	513 #else
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	514 if( timeslice_count[cpu_this] == 0 )
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	515 #endif
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	516 {
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	517 CYG_INSTRUMENT_SCHED(TIMESLICE,0,0);
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	518 #ifdef CYGDBG_KERNEL_TRACE_TIMESLICE
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	519 CYG_TRACE0( true, "quantum consumed, time to reschedule" );
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	520 #endif
124 0ec04793409a Merge from eCos master repository on 2000-09-11-03:00:13-BST jlarmour parents: 115 diff changeset	521
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	522 CYG_ASSERT( get_sched_lock() > 0 , "Timeslice called with zero sched_lock");
124 0ec04793409a Merge from eCos master repository on 2000-09-11-03:00:13-BST jlarmour parents: 115 diff changeset	523
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 124 diff changeset	524 // Only try to rotate the run queue if the current thread is running.
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 124 diff changeset	525 // Otherwise we are going to reschedule anyway.
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 124 diff changeset	526 if( thread->get_state() == Cyg_Thread::RUNNING )
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 124 diff changeset	527 {
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 124 diff changeset	528 Cyg_Scheduler *sched = &Cyg_Scheduler::scheduler;
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 124 diff changeset	529
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	530 CYG_INSTRUMENT_MLQ( TIMESLICE, thread, 0);
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	531
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 124 diff changeset	532 CYG_ASSERTCLASS( thread, "Bad current thread");
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 124 diff changeset	533 CYG_ASSERTCLASS( sched, "Bad scheduler");
124 0ec04793409a Merge from eCos master repository on 2000-09-11-03:00:13-BST jlarmour parents: 115 diff changeset	534
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	535 cyg_priority pri = thread->priority;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	536 Cyg_RunQueue *queue = &sched->run_queue[pri];
124 0ec04793409a Merge from eCos master repository on 2000-09-11-03:00:13-BST jlarmour parents: 115 diff changeset	537
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	538 #ifdef CYGPKG_KERNEL_SMP_SUPPORT
124 0ec04793409a Merge from eCos master repository on 2000-09-11-03:00:13-BST jlarmour parents: 115 diff changeset	539
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	540 // In SMP systems we set the head of the queue to point to
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	541 // the thread immediately after the current
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	542 // thread. schedule() will then pick that thread, or one
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	543 // after it to run next.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	544
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	545 queue->to_head( thread->get_next() );
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	546 #else
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	547 queue->rotate();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	548 #endif
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	549
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	550 if( queue->get_head() != thread )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	551 sched->set_need_reschedule();
124 0ec04793409a Merge from eCos master repository on 2000-09-11-03:00:13-BST jlarmour parents: 115 diff changeset	552
197 51b34619b677 Merge from eCos master repository on 2001-11-30-11:22:06-GMT jlarmour parents: 182 diff changeset	553 timeslice_count[cpu_this] = CYGNUM_KERNEL_SCHED_TIMESLICE_TICKS;
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 124 diff changeset	554 }
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	555 }
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	556
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	557
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	558 CYG_ASSERT( queue_map & (1<<CYG_THREAD_MIN_PRIORITY), "Idle thread vanished!!!");
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	559 CYG_ASSERT( !run_queue[CYG_THREAD_MIN_PRIORITY].empty(), "Idle thread vanished!!!");
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	560 #ifdef CYGDBG_KERNEL_TRACE_TIMESLICE
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	561 CYG_REPORT_RETURN();
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	562 #endif
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	563 }
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	564
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	565 // -------------------------------------------------------------------------
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	566
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	567 __externC void cyg_scheduler_timeslice_cpu(void)
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	568 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	569 Cyg_Scheduler::scheduler.timeslice_cpu();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	570 }
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	571
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	572 #endif
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	573
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	574 //==========================================================================
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	575 // Cyg_SchedThread_Implementation class members
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	576
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	577 Cyg_SchedThread_Implementation::Cyg_SchedThread_Implementation
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	578 (
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	579 CYG_ADDRWORD sched_info
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	580 )
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	581 {
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	582 CYG_REPORT_FUNCTION();
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	583 CYG_REPORT_FUNCARG1("sched_info=%08x", sched_info);
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	584
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	585 // Set priority to the supplied value.
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	586 priority = (cyg_priority)sched_info;
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	587
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	588 #ifdef CYGSEM_KERNEL_SCHED_TIMESLICE_ENABLE
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	589 // If timeslice_enabled exists, set it true by default
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	590 timeslice_enabled = true;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	591 #endif
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	592 #ifdef CYGPKG_KERNEL_SMP_SUPPORT
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	593 cpu = CYG_KERNEL_CPU_NONE;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	594 #endif
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	595
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	596 CYG_REPORT_RETURN();
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	597 }
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	598
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	599 // -------------------------------------------------------------------------
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	600 // Yield the processor to another thread
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	601
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	602 void
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	603 Cyg_SchedThread_Implementation::yield(void)
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	604 {
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	605 CYG_REPORT_FUNCTION();
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	606
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	607 // Prevent preemption
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	608 Cyg_Scheduler::lock();
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	609
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	610 Cyg_Thread *thread = CYG_CLASSFROMBASE(Cyg_Thread,
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	611 Cyg_SchedThread_Implementation,
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	612 this);
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	613
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	614 // Only do this if this thread is running. If it is not, there
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	615 // is no point.
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	616
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	617 if( thread->get_state() == Cyg_Thread::RUNNING )
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	618 {
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	619 // To yield we simply rotate the appropriate
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	620 // run queue to the next thread and reschedule.
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	621
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	622 CYG_INSTRUMENT_MLQ( YIELD, thread, 0);
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	623
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	624 CYG_ASSERTCLASS( thread, "Bad current thread");
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	625
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	626 Cyg_Scheduler *sched = &Cyg_Scheduler::scheduler;
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	627
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	628 CYG_ASSERTCLASS( sched, "Bad scheduler");
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	629
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	630 cyg_priority pri = thread->priority;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	631 Cyg_RunQueue *queue = &sched->run_queue[pri];
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	632
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	633 #ifdef CYGPKG_KERNEL_SMP_SUPPORT
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	634
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	635 // In SMP systems we set the head of the queue to point to
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	636 // the thread immediately after the current
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	637 // thread. schedule() will then pick that thread, or one
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	638 // after it to run next.
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	639
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	640 queue->to_head( thread->get_next() );
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	641 #else
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	642 queue->rotate();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	643 #endif
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	644
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	645 if( queue->get_head() != thread )
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	646 sched->set_need_reschedule();
2348 73a01c1a35ba * src/sched/mlqueue.cxx (add_thread, yield): nickg parents: 1766 diff changeset	647 else
73a01c1a35ba * src/sched/mlqueue.cxx (add_thread, yield): nickg parents: 1766 diff changeset	648 {
73a01c1a35ba * src/sched/mlqueue.cxx (add_thread, yield): nickg parents: 1766 diff changeset	649 // Reset the timeslice counter so that this thread gets a
73a01c1a35ba * src/sched/mlqueue.cxx (add_thread, yield): nickg parents: 1766 diff changeset	650 // full quantum as a reward for yielding when it is
73a01c1a35ba * src/sched/mlqueue.cxx (add_thread, yield): nickg parents: 1766 diff changeset	651 // eventually rescheduled.
73a01c1a35ba * src/sched/mlqueue.cxx (add_thread, yield): nickg parents: 1766 diff changeset	652 thread->timeslice_reset();
73a01c1a35ba * src/sched/mlqueue.cxx (add_thread, yield): nickg parents: 1766 diff changeset	653 }
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	654
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	655 }
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	656
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	657 // Unlock the scheduler and switch threads
124 0ec04793409a Merge from eCos master repository on 2000-09-11-03:00:13-BST jlarmour parents: 115 diff changeset	658 #ifdef CYGDBG_USE_ASSERTS
0ec04793409a Merge from eCos master repository on 2000-09-11-03:00:13-BST jlarmour parents: 115 diff changeset	659 // This test keeps the assertions in unlock_inner() happy if
0ec04793409a Merge from eCos master repository on 2000-09-11-03:00:13-BST jlarmour parents: 115 diff changeset	660 // need_reschedule was not set above.
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	661 if( !Cyg_Scheduler::get_need_reschedule() )
124 0ec04793409a Merge from eCos master repository on 2000-09-11-03:00:13-BST jlarmour parents: 115 diff changeset	662 Cyg_Scheduler::unlock();
0ec04793409a Merge from eCos master repository on 2000-09-11-03:00:13-BST jlarmour parents: 115 diff changeset	663 else
0ec04793409a Merge from eCos master repository on 2000-09-11-03:00:13-BST jlarmour parents: 115 diff changeset	664 #endif
0ec04793409a Merge from eCos master repository on 2000-09-11-03:00:13-BST jlarmour parents: 115 diff changeset	665 Cyg_Scheduler::unlock_reschedule();
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	666
124 0ec04793409a Merge from eCos master repository on 2000-09-11-03:00:13-BST jlarmour parents: 115 diff changeset	667
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	668 CYG_REPORT_RETURN();
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	669 }
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	670
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	671 // -------------------------------------------------------------------------
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	672 // Rotate the run queue at a specified priority.
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	673 // (pri is the decider, not this, so the routine is static)
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	674
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	675 void
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	676 Cyg_SchedThread_Implementation::rotate_queue( cyg_priority pri )
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	677 {
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	678 CYG_REPORT_FUNCTION();
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	679 CYG_REPORT_FUNCARG1("priority=%d", pri);
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	680
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	681 // Prevent preemption
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	682 Cyg_Scheduler::lock();
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	683
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	684 Cyg_Scheduler *sched = &Cyg_Scheduler::scheduler;
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	685
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	686 CYG_ASSERTCLASS( sched, "Bad scheduler");
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	687
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	688 Cyg_RunQueue *queue = &sched->run_queue[pri];
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	689
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	690 if ( !queue->empty() ) {
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	691 queue->rotate();
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	692 sched->set_need_reschedule();
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	693 }
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	694
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	695 // Unlock the scheduler and switch threads
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	696 Cyg_Scheduler::unlock();
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	697
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	698 CYG_REPORT_RETURN();
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	699 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	700
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	701 // -------------------------------------------------------------------------
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	702 // Move this thread to the head of its queue
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	703 // (not necessarily a scheduler queue)
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	704
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	705 void
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	706 Cyg_SchedThread_Implementation::to_queue_head( void )
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	707 {
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	708 CYG_REPORT_FUNCTION();
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	709
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	710 // Prevent preemption
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	711 Cyg_Scheduler::lock();
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	712
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	713 Cyg_Thread *thread = CYG_CLASSFROMBASE(Cyg_Thread,
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	714 Cyg_SchedThread_Implementation,
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	715 this);
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	716
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	717 CYG_ASSERTCLASS( thread, "Bad current thread");
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	718
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	719 Cyg_ThreadQueue *q = thread->get_current_queue();
182 f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 179 diff changeset	720 if( q != NULL )
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 179 diff changeset	721 q->to_head( thread );
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 179 diff changeset	722 else if( thread->in_list() )
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 179 diff changeset	723 {
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 179 diff changeset	724 // If the queue pointer is NULL then it is on a run
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 179 diff changeset	725 // queue. Move the thread to the head of it's priority list
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 179 diff changeset	726 // and force a reschedule.
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 179 diff changeset	727
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 179 diff changeset	728 Cyg_Scheduler *sched = &Cyg_Scheduler::scheduler;
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 179 diff changeset	729 sched->run_queue[thread->priority].to_head( thread );
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 179 diff changeset	730 sched->set_need_reschedule( thread );
f62680ef1804 Merge from eCos master repository on 2001-09-07-06:43:02-BST jlarmour parents: 179 diff changeset	731 }
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	732
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	733 // Unlock the scheduler and switch threads
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	734 Cyg_Scheduler::unlock();
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	735
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	736 CYG_REPORT_RETURN();
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	737 }
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	738
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	739 //==========================================================================
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	740 // Cyg_ThreadQueue_Implementation class members
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	741
148 8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	742 // -------------------------------------------------------------------------
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	743
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	744 void
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	745 Cyg_ThreadQueue_Implementation::enqueue(Cyg_Thread *thread)
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	746 {
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	747 CYG_REPORT_FUNCTION();
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	748 CYG_REPORT_FUNCARG1("thread=%08x", thread);
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	749
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	750 CYG_INSTRUMENT_MLQ( ENQUEUE, this, thread );
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	751
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	752 #ifdef CYGIMP_KERNEL_SCHED_SORTED_QUEUES
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	753
148 8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	754 // Insert the thread into the queue in priority order.
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	755
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	756 Cyg_Thread *qhead = get_head();
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	757
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	758 if( qhead == NULL ) add_tail( thread );
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	759 else if( qhead == qhead->get_next() )
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	760 {
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	761 // There is currently only one thread in the queue, join it
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	762 // and adjust the queue pointer to point to the highest
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	763 // priority of the two. If they are the same priority,
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	764 // leave the pointer pointing to the oldest.
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	765
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	766 qhead->insert( thread );
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	767
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	768 if( thread->priority < qhead->priority )
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	769 to_head(thread);
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	770 }
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	771 else
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	772 {
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	773 // There is more than one thread in the queue. First check
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	774 // whether we are of higher priority than the head and if
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	775 // so just jump in at the front. Also check whether we are
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	776 // lower priority than the tail and jump onto the end.
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	777 // Otherwise we really have to search the queue to find
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	778 // our place.
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	779
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	780 if( thread->priority < qhead->priority )
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	781 {
148 8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	782 qhead->insert( thread );
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	783 to_head(thread);
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	784 }
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	785 else if( thread->priority > get_tail()->priority )
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	786 {
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	787 // We are lower priority than any thread in the queue,
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	788 // go in at the end.
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	789
148 8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	790 add_tail( thread );
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	791 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	792 else
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	793 {
148 8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	794 // Search the queue. We do this backwards so that we
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	795 // always add new threads after any that have the same
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	796 // priority.
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	797
148 8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	798 // Because of the previous tests we know that this
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	799 // search will terminate before we hit the head of the
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	800 // queue, hence we do not need to check for that
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	801 // condition.
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	802
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	803 Cyg_Thread *qtmp = get_tail();
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	804
148 8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	805 // Scan the queue until we find a higher or equal
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	806 // priority thread.
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	807
1766 a2c686b87032 * src/sched/mlqueue.cxx (enqueue): Fix bug in sorted queue nickg parents: 210 diff changeset	808 while( qtmp->priority > thread->priority )
148 8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	809 qtmp = qtmp->get_prev();
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	810
148 8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	811 // Append ourself after the node pointed to by qtmp.
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	812
148 8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	813 qtmp->append( thread );
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	814 }
148 8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	815 }
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	816 #else
148 8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	817 // Just add the thread to the tail of the list
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	818 add_tail( thread );
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	819 #endif
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	820
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	821 thread->queue = CYG_CLASSFROMBASE(Cyg_ThreadQueue,
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	822 Cyg_ThreadQueue_Implementation,
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	823 this);
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	824 CYG_REPORT_RETURN();
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	825 }
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	826
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	827 // -------------------------------------------------------------------------
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	828
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	829 Cyg_Thread *
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	830 Cyg_ThreadQueue_Implementation::dequeue(void)
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	831 {
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	832 CYG_REPORT_FUNCTYPE("returning thread %08x");
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	833
148 8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	834 Cyg_Thread *thread = rem_head();
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	835
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	836 CYG_INSTRUMENT_MLQ( DEQUEUE, this, thread );
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	837
148 8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	838 if( thread != NULL )
8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	839 thread->queue = NULL;
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	840
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	841 CYG_REPORT_RETVAL(thread);
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	842 return thread;
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	843 }
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	844
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	845 // -------------------------------------------------------------------------
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	846
151 25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT jlarmour parents: 150 diff changeset	847 void
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT jlarmour parents: 150 diff changeset	848 Cyg_ThreadQueue_Implementation::remove( Cyg_Thread *thread )
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT jlarmour parents: 150 diff changeset	849 {
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT jlarmour parents: 150 diff changeset	850 CYG_REPORT_FUNCTION();
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT jlarmour parents: 150 diff changeset	851 CYG_REPORT_FUNCARG1("thread=%08x", thread);
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT jlarmour parents: 150 diff changeset	852
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	853 CYG_INSTRUMENT_MLQ( REMOVE, this, thread );
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 160 diff changeset	854
151 25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT jlarmour parents: 150 diff changeset	855 thread->queue = NULL;
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT jlarmour parents: 150 diff changeset	856
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT jlarmour parents: 150 diff changeset	857 Cyg_CList_T<Cyg_Thread>::remove( thread );
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT jlarmour parents: 150 diff changeset	858
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT jlarmour parents: 150 diff changeset	859 CYG_REPORT_RETURN();
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT jlarmour parents: 150 diff changeset	860 }
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT jlarmour parents: 150 diff changeset	861
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT jlarmour parents: 150 diff changeset	862 // -------------------------------------------------------------------------
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT jlarmour parents: 150 diff changeset	863
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	864 Cyg_Thread *
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	865 Cyg_ThreadQueue_Implementation::highpri(void)
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	866 {
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	867 CYG_REPORT_FUNCTYPE("returning thread %08x");
150 f0e3fb000de8 Merge from eCos master repository on 2001-01-26-06:43:02-GMT jlarmour parents: 148 diff changeset	868 CYG_REPORT_RETVAL(get_head());
148 8f2f7615e727 Merge from eCos master repository on 2001-01-12-06:43:03-GMT jlarmour parents: 128 diff changeset	869 return get_head();
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	870 }
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	871
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	872 // -------------------------------------------------------------------------
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	873
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	874 inline void
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	875 Cyg_ThreadQueue_Implementation::set_thread_queue(Cyg_Thread *thread,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	876 Cyg_ThreadQueue *tq )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	877
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	878 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	879 thread->queue = tq;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	880 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	881
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	882 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	883
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	884 #endif
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	885
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	886 // -------------------------------------------------------------------------
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	887 // EOF sched/mlqueue.cxx

Mercurial > ecos-v3_0-branch

annotate packages/kernel/current/src/sched/mlqueue.cxx @ 2863:7d8c61e6225c default tip