Mercurial > sdl-ios-xcode
annotate src/thread/os2/SDL_sysmutex.c @ 1358:c71e05b4dc2e
More header massaging... works great on Windows. ;-)
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 10 Feb 2006 06:48:43 +0000 |
| parents | 604d73db6802 |
| children | d910939febfa |
| 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 | |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1190
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 */ | |
| 22 | |
| 23 /* Mutex functions using the OS/2 API */ | |
| 24 | |
| 25 #define INCL_DOSERRORS | |
| 26 #define INCL_DOSSEMAPHORES | |
| 27 #include <os2.h> | |
| 28 | |
| 29 #include "SDL_mutex.h" | |
| 30 | |
| 31 | |
| 32 struct SDL_mutex { | |
| 33 HMTX hmtxID; | |
| 34 }; | |
| 35 | |
| 36 /* Create a mutex */ | |
| 37 DECLSPEC SDL_mutex * SDLCALL SDL_CreateMutex(void) | |
| 38 { | |
| 39 SDL_mutex *mutex; | |
| 40 APIRET ulrc; | |
| 41 | |
| 42 /* Allocate mutex memory */ | |
|
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3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
43 mutex = (SDL_mutex *)SDL_malloc(sizeof(*mutex)); |
| 1190 | 44 if (mutex) |
| 45 { | |
| 46 /* Create the mutex, with initial value signaled */ | |
| 47 ulrc = DosCreateMutexSem(NULL, // Create unnamed semaphore | |
| 48 &(mutex->hmtxID), // Pointer to handle | |
| 49 0L, // Flags: create it private (not shared) | |
| 50 FALSE); // Initial value: unowned | |
| 51 if (ulrc!=NO_ERROR) | |
| 52 { | |
| 53 SDL_SetError("Couldn't create mutex"); | |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
54 SDL_free(mutex); |
| 1190 | 55 mutex = NULL; |
| 56 } | |
| 57 } else { | |
| 58 SDL_OutOfMemory(); | |
| 59 } | |
| 60 return(mutex); | |
| 61 } | |
| 62 | |
| 63 /* Free the mutex */ | |
| 64 DECLSPEC void SDLCALL SDL_DestroyMutex(SDL_mutex *mutex) | |
| 65 { | |
| 66 if ( mutex ) | |
| 67 { | |
| 68 if ( mutex->hmtxID ) | |
| 69 { | |
| 70 DosCloseMutexSem(mutex->hmtxID); | |
| 71 mutex->hmtxID = 0; | |
| 72 } | |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
73 SDL_free(mutex); |
| 1190 | 74 } |
| 75 } | |
| 76 | |
| 77 /* Lock the mutex */ | |
| 78 DECLSPEC int SDLCALL SDL_mutexP(SDL_mutex *mutex) | |
| 79 { | |
| 80 if ( mutex == NULL ) | |
| 81 { | |
| 82 SDL_SetError("Passed a NULL mutex"); | |
| 83 return -1; | |
| 84 } | |
| 85 if ( DosRequestMutexSem(mutex->hmtxID, SEM_INDEFINITE_WAIT) != NO_ERROR ) | |
| 86 { | |
| 87 SDL_SetError("Couldn't wait on mutex"); | |
| 88 return -1; | |
| 89 } | |
| 90 return(0); | |
| 91 } | |
| 92 | |
| 93 /* Unlock the mutex */ | |
| 94 DECLSPEC int SDLCALL SDL_mutexV(SDL_mutex *mutex) | |
| 95 { | |
| 96 if ( mutex == NULL ) | |
| 97 { | |
| 98 SDL_SetError("Passed a NULL mutex"); | |
| 99 return -1; | |
| 100 } | |
| 101 if ( DosReleaseMutexSem(mutex->hmtxID) != NO_ERROR ) | |
| 102 { | |
| 103 SDL_SetError("Couldn't release mutex"); | |
| 104 return -1; | |
| 105 } | |
| 106 return(0); | |
| 107 } |