Mercurial > sdl-ios-xcode
view src/thread/win32/SDL_sysmutex.c @ 3796:b19680c84cdf SDL-ryan-multiple-audio-device
Bunch of 1.3 audio cleanups to remove FIXMEs, get driver specific crap out of
the core and into the drivers where it belongs, and push generic
responsibilities out of the drivers and into the core where they belong.
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Wed, 04 Oct 2006 19:54:23 +0000 |
parents | c121d94672cb |
children | 99210400e8b9 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2006 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 Win32 API */ #define WIN32_LEAN_AND_MEAN #include <windows.h> #include "SDL_mutex.h" struct SDL_mutex { HANDLE id; }; /* Create a mutex */ SDL_mutex * SDL_CreateMutex(void) { SDL_mutex *mutex; /* Allocate mutex memory */ mutex = (SDL_mutex *) SDL_malloc(sizeof(*mutex)); if (mutex) { /* Create the mutex, with initial value signaled */ mutex->id = CreateMutex(NULL, FALSE, NULL); if (!mutex->id) { SDL_SetError("Couldn't create mutex"); SDL_free(mutex); mutex = NULL; } } else { SDL_OutOfMemory(); } return (mutex); } /* Free the mutex */ void SDL_DestroyMutex(SDL_mutex * mutex) { if (mutex) { if (mutex->id) { CloseHandle(mutex->id); mutex->id = 0; } SDL_free(mutex); } } /* Lock the mutex */ int SDL_mutexP(SDL_mutex * mutex) { if (mutex == NULL) { SDL_SetError("Passed a NULL mutex"); return -1; } if (WaitForSingleObject(mutex->id, INFINITE) == WAIT_FAILED) { SDL_SetError("Couldn't wait on mutex"); return -1; } return (0); } /* Unlock the mutex */ int SDL_mutexV(SDL_mutex * mutex) { if (mutex == NULL) { SDL_SetError("Passed a NULL mutex"); return -1; } if (ReleaseMutex(mutex->id) == FALSE) { SDL_SetError("Couldn't release mutex"); return -1; } return (0); } /* vi: set ts=4 sw=4 expandtab: */