Mercurial > sdl-ios-xcode
annotate src/thread/os2/SDL_syssem.c @ 1768:814f9f2c7a33
Fixed bug #80
Date: 21 Apr 2003 17:20:20 +0100
From: Alan Swanson <swanson@uklinux.net>
Subject: [SDL] New XFree 4.3 Video Mode Patch
If you look at the unsorted list of modes returned by X, here's mine;
1280 x 1024 @ 85.0 >
1024 x 768 @ 100.3 > USER
800 x 600 @ 125.5 > SET
640 x 480 @ 124.9 >
1280 x 1024 @ 75.0 ]
1280 x 1024 @ 60.0 ]
1280 x 960 @ 85.0 ] X11
1280 x 960 @ 60.0 ] AUTO
1152 x 864 @ 75.0 ]=20
1152 x 768 @ 54.8 ]
960 x 720 @ 120.0 ]
...
640 x 400 @ 85.1 ] 256k
576 x 432 @ 150.0 ] 249k PIXEL
640 x 350 @ 85.1 ] 224k COUNT
576 x 384 @ 109.6 ] 221k
...
The user set modes come first followed by X set modes which are ordered
by decreasing number of pixels and refresh.
The reason why every other library or program not using SDL working is
due to SDL scanning the modes in reverse getting X11 provided modes
modes with the lowest refresh.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 05 May 2006 05:50:26 +0000 |
| parents | d910939febfa |
| children | 782fd950bd46 c121d94672cb a1b03ba2fcd0 |
| rev | line source |
|---|---|
| 1190 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1190
diff
changeset
|
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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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
6 modify it under the terms of the GNU Lesser General Public |
| 1190 | 7 License as published by the Free Software Foundation; either |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1190
diff
changeset
|
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 | |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1190
diff
changeset
|
13 Lesser General Public License for more details. |
| 1190 | 14 |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1190
diff
changeset
|
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 */ | |
|
1402
d910939febfa
Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents:
1358
diff
changeset
|
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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Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
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"); | |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
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 } | |
|
1336
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 } |