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author | Steve Kondik <shade@chemlab.org> | 2012-11-18 15:47:18 -0800 |
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committer | Steve Kondik <shade@chemlab.org> | 2012-11-18 15:47:18 -0800 |
commit | a546c7006355a7bd1df4267ee53d0bfa2c017c8c (patch) | |
tree | 01be0bf6c0d6968e1468ec9661fd52110f9b05a7 /distrib/sdl-1.2.15/src/thread/os2/SDL_sysmutex.c | |
parent | baf3d7830396202df5cc47bd7bcee109c319cdb3 (diff) | |
parent | 0f809250987b64f491bd3b4b73c0f0d33036a786 (diff) | |
download | external_qemu-a546c7006355a7bd1df4267ee53d0bfa2c017c8c.zip external_qemu-a546c7006355a7bd1df4267ee53d0bfa2c017c8c.tar.gz external_qemu-a546c7006355a7bd1df4267ee53d0bfa2c017c8c.tar.bz2 |
Merge branch 'jb-mr1-release' of https://android.googlesource.com/platform/external/qemu into mr1-staging
Change-Id: I8a4a71ac65b08e6e17f26c942f67a15b85211115
Diffstat (limited to 'distrib/sdl-1.2.15/src/thread/os2/SDL_sysmutex.c')
-rw-r--r-- | distrib/sdl-1.2.15/src/thread/os2/SDL_sysmutex.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/distrib/sdl-1.2.15/src/thread/os2/SDL_sysmutex.c b/distrib/sdl-1.2.15/src/thread/os2/SDL_sysmutex.c new file mode 100644 index 0000000..1e21897 --- /dev/null +++ b/distrib/sdl-1.2.15/src/thread/os2/SDL_sysmutex.c @@ -0,0 +1,108 @@ +/* + SDL - Simple DirectMedia Layer + Copyright (C) 1997-2012 Sam Lantinga + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + + Sam Lantinga + slouken@libsdl.org +*/ +#include "SDL_config.h" + +/* Mutex functions using the OS/2 API */ + +#define INCL_DOSERRORS +#define INCL_DOSSEMAPHORES +#include <os2.h> + +#include "SDL_mutex.h" + + +struct SDL_mutex { + HMTX hmtxID; +}; + +/* Create a mutex */ +DECLSPEC SDL_mutex * SDLCALL SDL_CreateMutex(void) +{ + SDL_mutex *mutex; + APIRET ulrc; + + /* Allocate mutex memory */ + mutex = (SDL_mutex *)SDL_malloc(sizeof(*mutex)); + if (mutex) + { + /* Create the mutex, with initial value signaled */ + ulrc = DosCreateMutexSem(NULL, // Create unnamed semaphore + &(mutex->hmtxID), // Pointer to handle + 0L, // Flags: create it private (not shared) + FALSE); // Initial value: unowned + if (ulrc!=NO_ERROR) + { + SDL_SetError("Couldn't create mutex"); + SDL_free(mutex); + mutex = NULL; + } + } else { + SDL_OutOfMemory(); + } + return(mutex); +} + +/* Free the mutex */ +DECLSPEC void SDLCALL SDL_DestroyMutex(SDL_mutex *mutex) +{ + if ( mutex ) + { + if ( mutex->hmtxID ) + { + DosCloseMutexSem(mutex->hmtxID); + mutex->hmtxID = 0; + } + SDL_free(mutex); + } +} + +/* Lock the mutex */ +DECLSPEC int SDLCALL SDL_mutexP(SDL_mutex *mutex) +{ + if ( mutex == NULL ) + { + SDL_SetError("Passed a NULL mutex"); + return -1; + } + if ( DosRequestMutexSem(mutex->hmtxID, SEM_INDEFINITE_WAIT) != NO_ERROR ) + { + SDL_SetError("Couldn't wait on mutex"); + return -1; + } + return(0); +} + +/* Unlock the mutex */ +DECLSPEC int SDLCALL SDL_mutexV(SDL_mutex *mutex) +{ + if ( mutex == NULL ) + { + SDL_SetError("Passed a NULL mutex"); + return -1; + } + if ( DosReleaseMutexSem(mutex->hmtxID) != NO_ERROR ) + { + SDL_SetError("Couldn't release mutex"); + return -1; + } + return(0); +} |