Mercurial > sdl-ios-xcode
annotate src/thread/os2/SDL_sysmutex.c @ 4347:38f22ed3a433 SDL-1.2
Option to fix bug #851
For some people setting the period size works better (and is what SDL 1.2.13 did), but for most people it's the same or worse. You can use an environment variable to pick which one you want.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 17 Oct 2009 06:55:17 +0000 |
| parents | a1b03ba2fcd0 |
| children |
| rev | line source |
|---|---|
| 1190 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
| 4159 | 3 Copyright (C) 1997-2009 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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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
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1190
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changeset
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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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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
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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
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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
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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
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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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Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
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22 #include "SDL_config.h" |
| 1190 | 23 |
| 24 /* Mutex functions using the OS/2 API */ | |
| 25 | |
| 26 #define INCL_DOSERRORS | |
| 27 #define INCL_DOSSEMAPHORES | |
| 28 #include <os2.h> | |
| 29 | |
| 30 #include "SDL_mutex.h" | |
| 31 | |
| 32 | |
| 33 struct SDL_mutex { | |
| 34 HMTX hmtxID; | |
| 35 }; | |
| 36 | |
| 37 /* Create a mutex */ | |
| 38 DECLSPEC SDL_mutex * SDLCALL SDL_CreateMutex(void) | |
| 39 { | |
| 40 SDL_mutex *mutex; | |
| 41 APIRET ulrc; | |
| 42 | |
| 43 /* Allocate mutex memory */ | |
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Use SDL_ prefixed versions of C library functions.
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parents:
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44 mutex = (SDL_mutex *)SDL_malloc(sizeof(*mutex)); |
| 1190 | 45 if (mutex) |
| 46 { | |
| 47 /* Create the mutex, with initial value signaled */ | |
| 48 ulrc = DosCreateMutexSem(NULL, // Create unnamed semaphore | |
| 49 &(mutex->hmtxID), // Pointer to handle | |
| 50 0L, // Flags: create it private (not shared) | |
| 51 FALSE); // Initial value: unowned | |
| 52 if (ulrc!=NO_ERROR) | |
| 53 { | |
| 54 SDL_SetError("Couldn't create mutex"); | |
|
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3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
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55 SDL_free(mutex); |
| 1190 | 56 mutex = NULL; |
| 57 } | |
| 58 } else { | |
| 59 SDL_OutOfMemory(); | |
| 60 } | |
| 61 return(mutex); | |
| 62 } | |
| 63 | |
| 64 /* Free the mutex */ | |
| 65 DECLSPEC void SDLCALL SDL_DestroyMutex(SDL_mutex *mutex) | |
| 66 { | |
| 67 if ( mutex ) | |
| 68 { | |
| 69 if ( mutex->hmtxID ) | |
| 70 { | |
| 71 DosCloseMutexSem(mutex->hmtxID); | |
| 72 mutex->hmtxID = 0; | |
| 73 } | |
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1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
74 SDL_free(mutex); |
| 1190 | 75 } |
| 76 } | |
| 77 | |
| 78 /* Lock the mutex */ | |
| 79 DECLSPEC int SDLCALL SDL_mutexP(SDL_mutex *mutex) | |
| 80 { | |
| 81 if ( mutex == NULL ) | |
| 82 { | |
| 83 SDL_SetError("Passed a NULL mutex"); | |
| 84 return -1; | |
| 85 } | |
| 86 if ( DosRequestMutexSem(mutex->hmtxID, SEM_INDEFINITE_WAIT) != NO_ERROR ) | |
| 87 { | |
| 88 SDL_SetError("Couldn't wait on mutex"); | |
| 89 return -1; | |
| 90 } | |
| 91 return(0); | |
| 92 } | |
| 93 | |
| 94 /* Unlock the mutex */ | |
| 95 DECLSPEC int SDLCALL SDL_mutexV(SDL_mutex *mutex) | |
| 96 { | |
| 97 if ( mutex == NULL ) | |
| 98 { | |
| 99 SDL_SetError("Passed a NULL mutex"); | |
| 100 return -1; | |
| 101 } | |
| 102 if ( DosReleaseMutexSem(mutex->hmtxID) != NO_ERROR ) | |
| 103 { | |
| 104 SDL_SetError("Couldn't release mutex"); | |
| 105 return -1; | |
| 106 } | |
| 107 return(0); | |
| 108 } |