diff options
Diffstat (limited to 'distrib/sdl-1.2.12/src/thread/win32/SDL_syssem.c')
| -rw-r--r-- | distrib/sdl-1.2.12/src/thread/win32/SDL_syssem.c | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/distrib/sdl-1.2.12/src/thread/win32/SDL_syssem.c b/distrib/sdl-1.2.12/src/thread/win32/SDL_syssem.c deleted file mode 100644 index c7a1bfd..0000000 --- a/distrib/sdl-1.2.12/src/thread/win32/SDL_syssem.c +++ /dev/null @@ -1,164 +0,0 @@ -/* - 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" - -/* Semaphore functions using the Win32 API */ - -#define WIN32_LEAN_AND_MEAN -#include <windows.h> - -#include "SDL_thread.h" -#if defined(_WIN32_WCE) && (_WIN32_WCE < 300) -#include "win_ce_semaphore.h" -#endif - - -struct SDL_semaphore { -#if defined(_WIN32_WCE) && (_WIN32_WCE < 300) - SYNCHHANDLE id; -#else - HANDLE id; -#endif - Uint32 volatile count; -}; - - -/* Create a semaphore */ -SDL_sem *SDL_CreateSemaphore(Uint32 initial_value) -{ - SDL_sem *sem; - - /* Allocate sem memory */ - sem = (SDL_sem *)SDL_malloc(sizeof(*sem)); - if ( sem ) { - /* Create the semaphore, with max value 32K */ -#if defined(_WIN32_WCE) && (_WIN32_WCE < 300) - sem->id = CreateSemaphoreCE(NULL, initial_value, 32*1024, NULL); -#else - sem->id = CreateSemaphore(NULL, initial_value, 32*1024, NULL); -#endif - sem->count = initial_value; - if ( ! sem->id ) { - SDL_SetError("Couldn't create semaphore"); - SDL_free(sem); - sem = NULL; - } - } else { - SDL_OutOfMemory(); - } - return(sem); -} - -/* Free the semaphore */ -void SDL_DestroySemaphore(SDL_sem *sem) -{ - if ( sem ) { - if ( sem->id ) { -#if defined(_WIN32_WCE) && (_WIN32_WCE < 300) - CloseSynchHandle(sem->id); -#else - CloseHandle(sem->id); -#endif - sem->id = 0; - } - SDL_free(sem); - } -} - -int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout) -{ - int retval; - DWORD dwMilliseconds; - - if ( ! sem ) { - SDL_SetError("Passed a NULL sem"); - return -1; - } - - if ( timeout == SDL_MUTEX_MAXWAIT ) { - dwMilliseconds = INFINITE; - } else { - dwMilliseconds = (DWORD)timeout; - } -#if defined(_WIN32_WCE) && (_WIN32_WCE < 300) - switch (WaitForSemaphoreCE(sem->id, dwMilliseconds)) { -#else - switch (WaitForSingleObject(sem->id, dwMilliseconds)) { -#endif - case WAIT_OBJECT_0: - --sem->count; - retval = 0; - break; - case WAIT_TIMEOUT: - retval = SDL_MUTEX_TIMEDOUT; - break; - default: - SDL_SetError("WaitForSingleObject() failed"); - retval = -1; - break; - } - return retval; -} - -int SDL_SemTryWait(SDL_sem *sem) -{ - return SDL_SemWaitTimeout(sem, 0); -} - -int SDL_SemWait(SDL_sem *sem) -{ - return SDL_SemWaitTimeout(sem, SDL_MUTEX_MAXWAIT); -} - -/* Returns the current count of the semaphore */ -Uint32 SDL_SemValue(SDL_sem *sem) -{ - if ( ! sem ) { - SDL_SetError("Passed a NULL sem"); - return 0; - } - return sem->count; -} - -int SDL_SemPost(SDL_sem *sem) -{ - if ( ! sem ) { - SDL_SetError("Passed a NULL sem"); - return -1; - } - /* Increase the counter in the first place, because - * after a successful release the semaphore may - * immediately get destroyed by another thread which - * is waiting for this semaphore. - */ - ++sem->count; -#if defined(_WIN32_WCE) && (_WIN32_WCE < 300) - if ( ReleaseSemaphoreCE(sem->id, 1, NULL) == FALSE ) { -#else - if ( ReleaseSemaphore(sem->id, 1, NULL) == FALSE ) { -#endif - --sem->count; /* restore */ - SDL_SetError("ReleaseSemaphore() failed"); - return -1; - } - return 0; -} |