diff options
Diffstat (limited to '3rdparty/SDL2/src/thread/windows/SDL_syssem.c')
-rw-r--r-- | 3rdparty/SDL2/src/thread/windows/SDL_syssem.c | 156 |
1 files changed, 0 insertions, 156 deletions
diff --git a/3rdparty/SDL2/src/thread/windows/SDL_syssem.c b/3rdparty/SDL2/src/thread/windows/SDL_syssem.c deleted file mode 100644 index 86b58882de3..00000000000 --- a/3rdparty/SDL2/src/thread/windows/SDL_syssem.c +++ /dev/null @@ -1,156 +0,0 @@ -/* - Simple DirectMedia Layer - Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org> - - This software is provided 'as-is', without any express or implied - warranty. In no event will the authors be held liable for any damages - arising from the use of this software. - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute it - freely, subject to the following restrictions: - - 1. The origin of this software must not be misrepresented; you must not - claim that you wrote the original software. If you use this software - in a product, an acknowledgment in the product documentation would be - appreciated but is not required. - 2. Altered source versions must be plainly marked as such, and must not be - misrepresented as being the original software. - 3. This notice may not be removed or altered from any source distribution. -*/ -#include "../../SDL_internal.h" - -#if SDL_THREAD_WINDOWS - -/* Semaphore functions using the Win32 API */ - -#include "../../core/windows/SDL_windows.h" - -#include "SDL_thread.h" - -struct SDL_semaphore -{ - HANDLE id; - LONG 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 __WINRT__ - sem->id = CreateSemaphoreEx(NULL, initial_value, 32 * 1024, NULL, 0, SEMAPHORE_ALL_ACCESS); -#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) { - CloseHandle(sem->id); - sem->id = 0; - } - SDL_free(sem); - } -} - -int -SDL_SemWaitTimeout(SDL_sem * sem, Uint32 timeout) -{ - int retval; - DWORD dwMilliseconds; - - if (!sem) { - return SDL_SetError("Passed a NULL sem"); - } - - if (timeout == SDL_MUTEX_MAXWAIT) { - dwMilliseconds = INFINITE; - } else { - dwMilliseconds = (DWORD) timeout; - } -#if __WINRT__ - switch (WaitForSingleObjectEx(sem->id, dwMilliseconds, FALSE)) { -#else - switch (WaitForSingleObject(sem->id, dwMilliseconds)) { -#endif - case WAIT_OBJECT_0: - InterlockedDecrement(&sem->count); - retval = 0; - break; - case WAIT_TIMEOUT: - retval = SDL_MUTEX_TIMEDOUT; - break; - default: - retval = SDL_SetError("WaitForSingleObject() failed"); - 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 (Uint32)sem->count; -} - -int -SDL_SemPost(SDL_sem * sem) -{ - if (!sem) { - return SDL_SetError("Passed a NULL sem"); - } - /* 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. - */ - InterlockedIncrement(&sem->count); - if (ReleaseSemaphore(sem->id, 1, NULL) == FALSE) { - InterlockedDecrement(&sem->count); /* restore */ - return SDL_SetError("ReleaseSemaphore() failed"); - } - return 0; -} - -#endif /* SDL_THREAD_WINDOWS */ - -/* vi: set ts=4 sw=4 expandtab: */ |