ecos: packages/kernel/current/include/sched.hxx annotate

annotate packages/kernel/current/include/sched.hxx @ 210:d2c90368aeef

Merge from eCos master repository on 2002-05-23-21:39:14-BST

author	jlarmour
date	Thu, 23 May 2002 22:59:51 +0000
parents	e0c0827131d1
children	5d7f57fd1729

rev	line source
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	1 #ifndef CYGONCE_KERNEL_SCHED_HXX
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	2 #define CYGONCE_KERNEL_SCHED_HXX
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	3
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	4 //==========================================================================
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	5 //
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	6 // sched.hxx
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	7 //
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	8 // Scheduler class declaration(s)
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	9 //
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	10 //==========================================================================
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	11 //####ECOSGPLCOPYRIGHTBEGIN####
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	12 // -------------------------------------------
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	13 // This file is part of eCos, the Embedded Configurable Operating System.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	14 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	15 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	16 // eCos is free software; you can redistribute it and/or modify it under
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	17 // the terms of the GNU General Public License as published by the Free
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	18 // Software Foundation; either version 2 or (at your option) any later version.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	19 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	20 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	21 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	22 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	23 // for more details.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	24 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	25 // You should have received a copy of the GNU General Public License along
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	26 // with eCos; if not, write to the Free Software Foundation, Inc.,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	27 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	28 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	29 // As a special exception, if other files instantiate templates or use macros
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	30 // or inline functions from this file, or you compile this file and link it
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	31 // with other works to produce a work based on this file, this file does not
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	32 // by itself cause the resulting work to be covered by the GNU General Public
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	33 // License. However the source code for this file must still be made available
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	34 // in accordance with section (3) of the GNU General Public License.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	35 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	36 // This exception does not invalidate any other reasons why a work based on
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	37 // this file might be covered by the GNU General Public License.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	38 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	39 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
210 d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	40 // at http://sources.redhat.com/ecos/ecos-license/
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	41 // -------------------------------------------
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	42 //####ECOSGPLCOPYRIGHTEND####
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	43 //==========================================================================
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	44 //#####DESCRIPTIONBEGIN####
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	45 //
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	46 // Author(s): nickg
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	47 // Contributors: nickg
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	48 // Date: 1997-09-09
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	49 // Purpose: Define Scheduler class interfaces
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	50 // Description: These class definitions supply the internal API
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	51 // used to scheduler threads.
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	52 // Usage: #include <cyg/kernel/sched.hxx>
0 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 //####DESCRIPTIONEND####
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	55 //
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
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	58 #include <cyg/kernel/ktypes.h>
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
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	61 #include <cyg/kernel/smp.hxx> // SMP support
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	62
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	63 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	64 // Miscellaneous types
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	65
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	66 #ifdef CYGSEM_KERNEL_SCHED_ASR_SUPPORT
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	67
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	68 typedef void Cyg_ASR( CYG_ADDRWORD data ); // ASR type signature
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	69
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	70 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	71
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	72 __externC void cyg_scheduler_set_need_reschedule();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	73
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	74 // -------------------------------------------------------------------------
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	75 // Scheduler base class. This defines stuff that is needed by the
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	76 // specific scheduler implementation. Each scheduler comprises three
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	77 // classes: Cyg_Scheduler_Base, Cyg_Scheduler_Implementation which
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	78 // inherits from it and Cyg_Scheduler which inherits from _it_ in turn.
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 class Cyg_Scheduler_Base
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	81 : public Cyg_Scheduler_SchedLock
0 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 friend class Cyg_HardwareThread;
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	84 friend class Cyg_SchedThread;
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 protected:
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	87 // The following variables are implicit in the API, but are
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	88 // not publically visible.
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	89
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	90 // Current running thread
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	91 static Cyg_Thread * volatile current_thread[CYGNUM_KERNEL_CPU_MAX]
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	92 CYGBLD_ANNOTATE_VARIABLE_SCHED;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	93
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	94 // Set when reschedule needed
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	95 static volatile cyg_bool need_reschedule[CYGNUM_KERNEL_CPU_MAX]
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	96 CYGBLD_ANNOTATE_VARIABLE_SCHED;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	97
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	98 // Count of number of thread switches
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	99 static volatile cyg_ucount32 thread_switches[CYGNUM_KERNEL_CPU_MAX]
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	100 CYGBLD_ANNOTATE_VARIABLE_SCHED;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	101
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	102 public:
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	103
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	104 // return a pointer to the current thread
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	105 static Cyg_Thread *get_current_thread();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	106
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	107 // Set current thread pointer
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	108 static void set_current_thread(Cyg_Thread *thread);
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	109 static void set_current_thread(Cyg_Thread *thread, HAL_SMP_CPU_TYPE cpu);
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	110
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	111 // Set need_reschedule flag
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	112 static void set_need_reschedule();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	113 static void set_need_reschedule(Cyg_Thread *thread);
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	114
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	115 // Get need_reschedule flag
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	116 static cyg_bool get_need_reschedule();
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	117
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	118 // Return current value of lock
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	119 static cyg_ucount32 get_sched_lock();
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	120
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	121 // Clear need_reschedule flag
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	122 static void clear_need_reschedule();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	123
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	124 // Return current number of thread switches
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	125 static cyg_ucount32 get_thread_switches();
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	126
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	127 };
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	128
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	129 // -------------------------------------------------------------------------
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	130 // Include the scheduler implementation header
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	131
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	132 #include CYGPRI_KERNEL_SCHED_IMPL_HXX
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	133
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	134 // Do some checking that we have a consistent universe.
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	135
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	136 #ifdef CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	137 # ifndef CYGIMP_THREAD_PRIORITY
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	138 # error Priority inversion protocols will not work without priorities!!!
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	139 # endif
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	140 #endif
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	141
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	142 // -------------------------------------------------------------------------
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	143 // Scheduler class. This is the public scheduler interface seen by the
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	144 // rest of the kernel.
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	145
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	146 class Cyg_Scheduler
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	147 : public Cyg_Scheduler_Implementation
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	148 {
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	149 friend class Cyg_Thread;
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	150
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	151 // This function is the actual implementation of the unlock
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	152 // function. The unlock() later is an inline shell that deals
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	153 // with the common case.
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	154
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	155 static void unlock_inner(cyg_uint32 new_lock = 0);
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	156
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	157 public:
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	158
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	159 CYGDBG_DEFINE_CHECK_THIS
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	160
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	161 // The following API functions are common to all scheduler
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	162 // implementations.
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	163
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	164 // claim the preemption lock
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	165 static void lock();
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	166
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	167 // release the preemption lock and possibly reschedule
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	168 static void unlock();
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	169
124 0ec04793409a Merge from eCos master repository on 2000-09-11-03:00:13-BST jlarmour parents: 115 diff changeset	170 // release and reclaim the lock atomically, keeping the old
0ec04793409a Merge from eCos master repository on 2000-09-11-03:00:13-BST jlarmour parents: 115 diff changeset	171 // value on restart
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	172 static void reschedule();
124 0ec04793409a Merge from eCos master repository on 2000-09-11-03:00:13-BST jlarmour parents: 115 diff changeset	173
0ec04793409a Merge from eCos master repository on 2000-09-11-03:00:13-BST jlarmour parents: 115 diff changeset	174 // decrement the lock but also look for a reschedule opportunity
0ec04793409a Merge from eCos master repository on 2000-09-11-03:00:13-BST jlarmour parents: 115 diff changeset	175 static void unlock_reschedule();
0ec04793409a Merge from eCos master repository on 2000-09-11-03:00:13-BST jlarmour parents: 115 diff changeset	176
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	177 // release the preemption lock without rescheduling
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	178 static void unlock_simple();
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: 0 diff changeset	179
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	180 // Start execution of the scheduler
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	181 static void start() CYGBLD_ATTRIB_NORET;
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	182
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	183 // Start execution of the scheduler on the current CPU
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: 177 diff changeset	184 static void start_cpu() CYGBLD_ATTRIB_NORET;
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	185
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	186 // The only scheduler instance should be this one...
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	187 static Cyg_Scheduler scheduler CYGBLD_ANNOTATE_VARIABLE_SCHED;
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	188
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	189 };
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	190
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	191 // -------------------------------------------------------------------------
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	192 // This class encapsulates the scheduling abstractions in a thread.
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	193 // Cyg_SchedThread is included as a base class of Cyg_Thread. The actual
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	194 // implementation of the abstractions is in Cyg_SchedThread_Implementation
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	195 // so this class has little to do.
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 class Cyg_SchedThread
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	198 : public Cyg_SchedThread_Implementation
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	199 {
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	200 friend class Cyg_ThreadQueue_Implementation;
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	201 friend class Cyg_Scheduler_Implementation;
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	202 friend class Cyg_Scheduler;
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	203
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	204 Cyg_ThreadQueue *queue;
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	205
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	206
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	207 public:
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	208
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	209 Cyg_SchedThread(Cyg_Thread *thread, CYG_ADDRWORD sched_info);
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	210
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	211 // Return current queue pointer
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	212
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	213 Cyg_ThreadQueue *get_current_queue();
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	214
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	215 // Remove this thread from current queue
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	216 void remove();
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	217
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	218 #ifdef CYGSEM_KERNEL_SCHED_ASR_SUPPORT
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	219
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	220 // ASR support.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	221 // An ASR is an Asynchronous Service Routine. When set pending it
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	222 // is called when the thread exits the scheduler. ASRs are mainly
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	223 // used by compatibility subsystems, such as POSIX, to implement
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	224 // such things as thread cancellation and signal delivery.
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	225
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	226 private:
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	227
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 124 diff changeset	228 volatile cyg_ucount32 asr_inhibit; // If > 0, blocks calls to ASRs
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	229
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 124 diff changeset	230 volatile cyg_bool asr_pending; // If true, this thread's ASR should be called.
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	231
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	232 #ifdef CYGSEM_KERNEL_SCHED_ASR_GLOBAL
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	233 static
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	234 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	235 Cyg_ASR *asr; // ASR function
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	236 #ifdef CYGSEM_KERNEL_SCHED_ASR_DATA_GLOBAL
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	237 static
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	238 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	239 CYG_ADDRWORD asr_data; // ASR data pointer
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	240
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	241 // Default ASR function
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	242 static void asr_default(CYG_ADDRWORD data);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	243
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	244 public:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	245
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	246 // Public interface to ASR mechanism
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	247
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	248 // Set, clear and get inhibit flag.
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 124 diff changeset	249 inline void set_asr_inhibit() { asr_inhibit++; }
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 124 diff changeset	250 inline void clear_asr_inhibit() { asr_inhibit--; }
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 124 diff changeset	251 inline cyg_ucount32 get_asr_inhibit() { return asr_inhibit; }
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	252
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	253 // Set and get pending flag. The flag is only cleared when the
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	254 // ASR is called.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	255 inline void set_asr_pending() { asr_pending = true; }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	256 inline cyg_bool get_asr_pending() { return asr_pending; }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	257
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	258 // Set a new ASR, returning the old one.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	259 void set_asr( Cyg_ASR *new_asr, CYG_ADDRWORD new_data,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	260 Cyg_ASR *old_asr, CYG_ADDRWORD old_data);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	261
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	262 // Clear the ASR function back to the default.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	263 void clear_asr();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	264
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	265 #else
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	266
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	267 public:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	268
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	269 // Even when we do not have ASRs enabled, we keep these functions
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	270 // available. This avoids excessive ifdefs in the rest of the
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	271 // kernel code.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	272 inline void set_asr_inhibit() { }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	273 inline void clear_asr_inhibit() { }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	274
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	275 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	276
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	277 #ifdef CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	278
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	279 private:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	280
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	281 // For all priority inversion protocols we need to keep track of how
62 7a6ac9edc838 Merge from eCos master repository on 2000-01-24-19:43:49-GMT jlarmour parents: 2 diff changeset	282 // many mutexes we have locked, including one which we are waiting to
7a6ac9edc838 Merge from eCos master repository on 2000-01-24-19:43:49-GMT jlarmour parents: 2 diff changeset	283 // lock, because we can inherit priority while sleeping just prior to
7a6ac9edc838 Merge from eCos master repository on 2000-01-24-19:43:49-GMT jlarmour parents: 2 diff changeset	284 // wakeup.
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	285
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	286 cyg_count32 mutex_count;
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	287
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	288 protected:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	289 // These are implementation functions that are common to all protocols.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	290
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	291 // Inherit the given priority. If thread is non-NULL the priority is
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	292 // being inherited from it, otherwise it has come from the mutex.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	293 void set_inherited_priority( cyg_priority pri, Cyg_Thread *thread = 0 );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	294
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	295 // Relay the priority of the ex-owner thread or from the queue if it
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	296 // has a higher priority than ours.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	297 void relay_inherited_priority( Cyg_Thread ex_owner, Cyg_ThreadQueue pqueue);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	298
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	299 // Lose priority inheritance
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	300 void clear_inherited_priority();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	301
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	302 public:
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	303 // Count and uncount the number of mutexes held by
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	304 // this thread.
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	305 void count_mutex() { mutex_count++; };
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	306 void uncount_mutex() { mutex_count--; };
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	307
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	308 #if defined(CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_SIMPLE)
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	309
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	310 protected:
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	311
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	312 // The simple priority inversion protocols simply needs
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	313 // somewhere to store the base priority of the current thread.
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	314
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	315 cyg_priority original_priority; // our original priority
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	316
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	317 cyg_bool priority_inherited; // have we inherited?
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	318
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	319 #endif
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	320
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	321 #ifdef CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_INHERIT
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	322
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	323 public:
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	324
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	325 // Inherit the priority of the provided thread if it
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	326 // has higher priority than this.
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	327 void inherit_priority( Cyg_Thread *thread);
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	328
62 7a6ac9edc838 Merge from eCos master repository on 2000-01-24-19:43:49-GMT jlarmour parents: 2 diff changeset	329 // Relay the priority of the ex-owner thread or from the queue if it
7a6ac9edc838 Merge from eCos master repository on 2000-01-24-19:43:49-GMT jlarmour parents: 2 diff changeset	330 // has a higher priority than ours.
7a6ac9edc838 Merge from eCos master repository on 2000-01-24-19:43:49-GMT jlarmour parents: 2 diff changeset	331 void relay_priority( Cyg_Thread ex_owner, Cyg_ThreadQueue pqueue);
7a6ac9edc838 Merge from eCos master repository on 2000-01-24-19:43:49-GMT jlarmour parents: 2 diff changeset	332
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	333 // Lose priority inheritance
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	334 void disinherit_priority();
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	335
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	336 #endif
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	337
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	338 #ifdef CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_CEILING
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	339
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	340 public:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	341
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	342 // Set the priority of this thread to the given ceiling.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	343 void set_priority_ceiling( cyg_priority pri );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	344
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	345 // Clear the ceiling, if necessary.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	346 void clear_priority_ceiling();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	347
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	348 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	349
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 66 diff changeset	350 #endif
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	351
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	352 };
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	353
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	354 // -------------------------------------------------------------------------
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	355 // Simple inline accessor functions
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	356
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	357 inline Cyg_Thread *Cyg_Scheduler_Base::get_current_thread()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	358 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	359 return current_thread[CYG_KERNEL_CPU_THIS()];
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	360 }
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	361
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	362 inline void Cyg_Scheduler_Base::set_current_thread(Cyg_Thread *thread )
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	363 {
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	364 current_thread[CYG_KERNEL_CPU_THIS()] = thread;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	365 }
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	366
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	367 inline void Cyg_Scheduler_Base::set_current_thread(Cyg_Thread *thread,
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	368 HAL_SMP_CPU_TYPE cpu)
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	369 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	370 current_thread[cpu] = thread;
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	371 }
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	372
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	373 inline cyg_bool Cyg_Scheduler_Base::get_need_reschedule()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	374 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	375 return need_reschedule[CYG_KERNEL_CPU_THIS()];
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	376 }
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	377
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	378 inline void Cyg_Scheduler_Base::set_need_reschedule()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	379 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	380 need_reschedule[CYG_KERNEL_CPU_THIS()] = true;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	381 }
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	382
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	383 inline void Cyg_Scheduler_Base::set_need_reschedule(Cyg_Thread *thread)
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	384 {
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	385 need_reschedule[CYG_KERNEL_CPU_THIS()] = true;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	386 }
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	387
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	388 inline void Cyg_Scheduler_Base::clear_need_reschedule()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	389 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	390 need_reschedule[CYG_KERNEL_CPU_THIS()] = false;
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	391 }
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	392
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	393 inline cyg_ucount32 Cyg_Scheduler_Base::get_sched_lock()
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	394 {
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	395 return Cyg_Scheduler_SchedLock::get_sched_lock();
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	396 }
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	397
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	398 // Return current number of thread switches
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	399 inline cyg_ucount32 Cyg_Scheduler_Base::get_thread_switches()
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	400 {
177 4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST jlarmour parents: 132 diff changeset	401 return thread_switches[CYG_KERNEL_CPU_THIS()];
0 3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	402 }
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	403
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	404 // Return current queue pointer
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	405 inline Cyg_ThreadQueue *Cyg_SchedThread::get_current_queue()
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	406 {
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	407 return queue;
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	408 }
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	409
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	410 // -------------------------------------------------------------------------
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	411 #endif // ifndef __SCHED_HXX__
3111d98ba7b3 Initial commit of eCos version 1.1 jlarmour parents: diff changeset	412 // EOF sched.hxx

Mercurial > ecos

annotate packages/kernel/current/include/sched.hxx @ 210:d2c90368aeef