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comparison packages/kernel/current/src/sync/flag.cxx @ 208:e0c0827131d1 ecos

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Merge from eCos master repository on 2002-05-20-20:11:54-BST
author jlarmour
date Mon, 20 May 2002 22:19:26 +0000
parents 6ed91473a1cd
children d2c90368aeef
comparison
equal deleted inserted replaced
207:74c807ddde34 208:e0c0827131d1
3 // flag.cxx 3 // flag.cxx
4 // 4 //
5 // Flag class implementation 5 // Flag class implementation
6 // 6 //
7 //========================================================================== 7 //==========================================================================
8 //####COPYRIGHTBEGIN#### 8 //####ECOSGPLCOPYRIGHTBEGIN####
9 // 9 // -------------------------------------------
10 // ------------------------------------------- 10 // This file is part of eCos, the Embedded Configurable Operating System.
11 // The contents of this file are subject to the Red Hat eCos Public License 11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
12 // Version 1.1 (the "License"); you may not use this file except in 12 //
13 // compliance with the License. You may obtain a copy of the License at 13 // eCos is free software; you can redistribute it and/or modify it under
14 // http://www.redhat.com/ 14 // the terms of the GNU General Public License as published by the Free
15 // 15 // Software Foundation; either version 2 or (at your option) any later version.
16 // Software distributed under the License is distributed on an "AS IS" 16 //
17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the 17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
18 // License for the specific language governing rights and limitations under 18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 // the License. 19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
20 // 20 // for more details.
21 // The Original Code is eCos - Embedded Configurable Operating System, 21 //
22 // released September 30, 1998. 22 // You should have received a copy of the GNU General Public License along
23 // 23 // with eCos; if not, write to the Free Software Foundation, Inc.,
24 // The Initial Developer of the Original Code is Red Hat. 24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
25 // Portions created by Red Hat are 25 //
26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc. 26 // As a special exception, if other files instantiate templates or use macros
27 // All Rights Reserved. 27 // or inline functions from this file, or you compile this file and link it
28 // ------------------------------------------- 28 // with other works to produce a work based on this file, this file does not
29 // 29 // by itself cause the resulting work to be covered by the GNU General Public
30 //####COPYRIGHTEND#### 30 // License. However the source code for this file must still be made available
31 // in accordance with section (3) of the GNU General Public License.
32 //
33 // This exception does not invalidate any other reasons why a work based on
34 // this file might be covered by the GNU General Public License.
35 //
36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
37 // at http://sources.redhat.com/ecos/ecos-license
38 // -------------------------------------------
39 //####ECOSGPLCOPYRIGHTEND####
31 //========================================================================== 40 //==========================================================================
32 //#####DESCRIPTIONBEGIN#### 41 //#####DESCRIPTIONBEGIN####
33 // 42 //
34 // Author(s): hmt 43 // Author(s): hmt
35 // Contributors: hmt 44 // Contributors: hmt
56 #include <cyg/kernel/clock.inl> // clock inlines 65 #include <cyg/kernel/clock.inl> // clock inlines
57 66
58 // ------------------------------------------------------------------------- 67 // -------------------------------------------------------------------------
59 // Constructor 68 // Constructor
60 69
61 Cyg_Flag::Cyg_Flag( Cyg_FlagValue init = 0 ) 70 Cyg_Flag::Cyg_Flag( Cyg_FlagValue init )
62 { 71 {
63 CYG_REPORT_FUNCTION(); 72 CYG_REPORT_FUNCTION();
64 value = init; 73 value = init;
65 CYG_REPORT_RETURN(); 74 CYG_REPORT_RETURN();
66 } 75 }
119 128
120 // clear some bits in the value (all of them by default) by ANDing with the 129 // clear some bits in the value (all of them by default) by ANDing with the
121 // argument. This cannot make a wait condition become true, so there's not 130 // argument. This cannot make a wait condition become true, so there's not
122 // much to it. 131 // much to it.
123 void 132 void
124 Cyg_Flag::maskbits( Cyg_FlagValue arg = 0 ) 133 Cyg_Flag::maskbits( Cyg_FlagValue arg )
125 { 134 {
126 CYG_REPORT_FUNCTION(); 135 CYG_REPORT_FUNCTION();
127 136
128 // Prevent preemption 137 // Prevent preemption
129 Cyg_Scheduler::lock(); 138 Cyg_Scheduler::lock();
143 // affected waiting threads; we do the decision making here so as to get 152 // affected waiting threads; we do the decision making here so as to get
144 // atomicity wrt the other threads waking up - the value might have changed 153 // atomicity wrt the other threads waking up - the value might have changed
145 // by the time they get to run. 154 // by the time they get to run.
146 155
147 void 156 void
148 Cyg_Flag::setbits( Cyg_FlagValue arg = ~0 ) 157 Cyg_Flag::setbits( Cyg_FlagValue arg )
149 { 158 {
150 CYG_REPORT_FUNCTION(); 159 CYG_REPORT_FUNCTION();
151 CYG_ASSERTCLASS( this, "Bad this pointer"); 160 CYG_ASSERTCLASS( this, "Bad this pointer");
152 161
153 // Prevent preemption 162 // Prevent preemption