Mercurial > sdl-ios-xcode
annotate src/thread/os2/SDL_syssem.c @ 1790:828a17e05192
Date: Mon, 8 May 2006 14:19:30 -0700
From: Bob Ippolito
Subject: SDL trunk (r2346) and Mac OS X
The current state of the trunk doesn't quite compile on Mac OS X,
I've attached a series of patches that gets it to compile and kills a
few warnings.
sdl-trunk-r2346-dlcompat-warnings.diff:
The dlcompat thing is just loaded with incorrect type signatures ..
some of them have changed since 10.2 and others are just flat wrong.
This puts it in sync with the latest headers. People on 10.2 will get
the warnings instead of people with new kits.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 09 May 2006 07:26:58 +0000 |
| parents | d910939febfa |
| children | 782fd950bd46 c121d94672cb a1b03ba2fcd0 |
| rev | line source |
|---|---|
| 1190 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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parents:
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|
3 Copyright (C) 1997-2006 Sam Lantinga |
| 1190 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
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6 modify it under the terms of the GNU Lesser General Public |
| 1190 | 7 License as published by the Free Software Foundation; either |
|
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8 version 2.1 of the License, or (at your option) any later version. |
| 1190 | 9 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
|
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Sam Lantinga <slouken@libsdl.org>
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13 Lesser General Public License for more details. |
| 1190 | 14 |
|
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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1190
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15 You should have received a copy of the GNU Lesser General Public |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1190
diff
changeset
|
16 License along with this library; if not, write to the Free Software |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1190
diff
changeset
|
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 1190 | 18 |
| 19 Sam Lantinga | |
| 20 slouken@libsdl.org | |
| 21 */ | |
|
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22 #include "SDL_config.h" |
| 1190 | 23 |
| 24 /* Semaphore functions using the OS/2 API */ | |
| 25 | |
| 26 #define INCL_DOS | |
| 27 #define INCL_DOSERRORS | |
| 28 #define INCL_DOSSEMAPHORES | |
| 29 #include <os2.h> | |
| 30 | |
| 31 #include "SDL_thread.h" | |
| 32 #include "SDL_timer.h" | |
| 33 | |
| 34 | |
| 35 struct SDL_semaphore { | |
| 36 HMTX id; | |
| 37 HEV changed; | |
| 38 Uint32 value; | |
| 39 }; | |
| 40 | |
| 41 | |
| 42 /* Create a semaphore */ | |
| 43 DECLSPEC SDL_sem * SDLCALL SDL_CreateSemaphore(Uint32 initial_value) | |
| 44 { | |
| 45 SDL_sem *sem; | |
| 46 ULONG ulrc; | |
| 47 | |
| 48 /* Allocate sem memory */ | |
|
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49 sem = (SDL_sem *)SDL_malloc(sizeof(*sem)); |
| 1190 | 50 if ( sem ) { |
| 51 /* Create the mutex semaphore */ | |
| 52 ulrc = DosCreateMutexSem(NULL,&(sem->id),0,TRUE); | |
| 53 if ( ulrc ) { | |
| 54 SDL_SetError("Couldn't create semaphore"); | |
|
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Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
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55 SDL_free(sem); |
| 1190 | 56 sem = NULL; |
| 57 } else | |
| 58 { | |
| 59 DosCreateEventSem(NULL, &(sem->changed), 0, FALSE); | |
| 60 sem->value = initial_value; | |
| 61 DosReleaseMutexSem(sem->id); | |
| 62 } | |
| 63 } else { | |
| 64 SDL_OutOfMemory(); | |
| 65 } | |
| 66 return(sem); | |
| 67 } | |
| 68 | |
| 69 /* Free the semaphore */ | |
| 70 DECLSPEC void SDLCALL SDL_DestroySemaphore(SDL_sem *sem) | |
| 71 { | |
| 72 if ( sem ) { | |
| 73 if ( sem->id ) { | |
| 74 DosCloseEventSem(sem->changed); | |
| 75 DosCloseMutexSem(sem->id); | |
| 76 sem->id = 0; | |
| 77 } | |
|
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3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
78 SDL_free(sem); |
| 1190 | 79 } |
| 80 } | |
| 81 | |
| 82 DECLSPEC int SDLCALL SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout) | |
| 83 { | |
| 84 ULONG ulrc; | |
| 85 | |
| 86 if ( ! sem ) { | |
| 87 SDL_SetError("Passed a NULL sem"); | |
| 88 return -1; | |
| 89 } | |
| 90 | |
| 91 if ( timeout == SDL_MUTEX_MAXWAIT ) { | |
| 92 while (1) { | |
| 93 ulrc = DosRequestMutexSem(sem->id, SEM_INDEFINITE_WAIT); | |
| 94 if (ulrc) { | |
| 95 /* if error waiting mutex */ | |
| 96 SDL_SetError("DosRequestMutexSem() failed"); | |
| 97 return -1; | |
| 98 } else if (sem->value) { | |
| 99 sem->value--; | |
| 100 DosReleaseMutexSem(sem->id); | |
| 101 return 0; | |
| 102 } else { | |
| 103 ULONG ulPostCount; | |
| 104 DosResetEventSem(sem->changed, &ulPostCount); | |
| 105 DosReleaseMutexSem(sem->id); | |
| 106 /* continue waiting until somebody posts the semaphore */ | |
| 107 DosWaitEventSem(sem->changed, SEM_INDEFINITE_WAIT); | |
| 108 } | |
| 109 } | |
| 110 } else | |
| 111 if ( timeout == 0 ) | |
| 112 { | |
| 113 ulrc = DosRequestMutexSem(sem->id, SEM_INDEFINITE_WAIT); | |
| 114 if (ulrc==NO_ERROR) | |
| 115 { | |
| 116 if (sem->value) | |
| 117 { | |
| 118 sem->value--; | |
| 119 DosReleaseMutexSem(sem->id); | |
| 120 return 0; | |
| 121 } else | |
| 122 { | |
| 123 DosReleaseMutexSem(sem->id); | |
| 124 return SDL_MUTEX_TIMEDOUT; | |
| 125 } | |
| 126 } else | |
| 127 { | |
| 128 SDL_SetError("DosRequestMutexSem() failed"); | |
| 129 return -1; | |
| 130 } | |
| 131 } else { | |
| 132 ulrc = DosRequestMutexSem(sem->id, SEM_INDEFINITE_WAIT); | |
| 133 if (ulrc) { | |
| 134 /* if error waiting mutex */ | |
| 135 SDL_SetError("DosRequestMutexSem() failed"); | |
| 136 return -1; | |
| 137 } else | |
| 138 if (sem->value) { | |
| 139 sem->value--; | |
| 140 DosReleaseMutexSem(sem->id); | |
| 141 return 0; | |
| 142 } else { | |
| 143 ULONG ulPostCount; | |
| 144 DosResetEventSem(sem->changed, &ulPostCount); | |
| 145 DosReleaseMutexSem(sem->id); | |
| 146 /* continue waiting until somebody posts the semaphore */ | |
| 147 ulrc = DosWaitEventSem(sem->changed, timeout); | |
| 148 if (ulrc==NO_ERROR) | |
| 149 return 0; | |
| 150 else | |
| 151 return SDL_MUTEX_TIMEDOUT; | |
| 152 } | |
| 153 } | |
| 154 /* never reached */ | |
| 155 return -1; | |
| 156 } | |
| 157 | |
| 158 DECLSPEC int SDLCALL SDL_SemTryWait(SDL_sem *sem) | |
| 159 { | |
| 160 return SDL_SemWaitTimeout(sem, 0); | |
| 161 } | |
| 162 | |
| 163 DECLSPEC int SDLCALL SDL_SemWait(SDL_sem *sem) | |
| 164 { | |
| 165 return SDL_SemWaitTimeout(sem, SDL_MUTEX_MAXWAIT); | |
| 166 } | |
| 167 | |
| 168 /* Returns the current count of the semaphore */ | |
| 169 DECLSPEC Uint32 SDLCALL SDL_SemValue(SDL_sem *sem) | |
| 170 { | |
| 171 if ( ! sem ) { | |
| 172 SDL_SetError("Passed a NULL sem"); | |
| 173 return 0; | |
| 174 } | |
| 175 return sem->value; | |
| 176 } | |
| 177 | |
| 178 DECLSPEC int SDLCALL SDL_SemPost(SDL_sem *sem) | |
| 179 { | |
| 180 if ( ! sem ) { | |
| 181 SDL_SetError("Passed a NULL sem"); | |
| 182 return -1; | |
| 183 } | |
| 184 if ( DosRequestMutexSem(sem->id,SEM_INDEFINITE_WAIT) ) { | |
| 185 SDL_SetError("DosRequestMutexSem() failed"); | |
| 186 return -1; | |
| 187 } | |
| 188 sem->value++; | |
| 189 DosPostEventSem(sem->changed); | |
| 190 DosReleaseMutexSem(sem->id); | |
| 191 return 0; | |
| 192 } |