mirror of https://github.com/libsdl-org/SDL.git
102 lines
2.5 KiB
C++
102 lines
2.5 KiB
C++
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_internal.h"
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extern "C" {
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#include "SDL_systhread_c.h"
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}
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#include <system_error>
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#include "SDL_sysmutex_c.h"
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#include <Windows.h>
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/* Create a mutex */
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extern "C" SDL_mutex *
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SDL_CreateMutex(void)
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{
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/* Allocate and initialize the mutex */
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try {
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SDL_mutex *mutex = new SDL_mutex;
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return mutex;
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} catch (std::system_error &ex) {
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SDL_SetError("unable to create a C++ mutex: code=%d; %s", ex.code(), ex.what());
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return NULL;
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} catch (std::bad_alloc &) {
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SDL_OutOfMemory();
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return NULL;
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}
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}
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/* Free the mutex */
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extern "C" void
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SDL_DestroyMutex(SDL_mutex *mutex)
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{
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if (mutex != NULL) {
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delete mutex;
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}
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}
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/* Lock the mutex */
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extern "C" int
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SDL_LockMutex(SDL_mutex *mutex) SDL_NO_THREAD_SAFETY_ANALYSIS /* clang doesn't know about NULL mutexes */
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{
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if (mutex == NULL) {
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return 0;
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}
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try {
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mutex->cpp_mutex.lock();
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return 0;
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} catch (std::system_error &ex) {
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return SDL_SetError("unable to lock a C++ mutex: code=%d; %s", ex.code(), ex.what());
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}
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}
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/* TryLock the mutex */
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int SDL_TryLockMutex(SDL_mutex *mutex)
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{
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int retval = 0;
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if (mutex == NULL) {
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return 0;
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}
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if (mutex->cpp_mutex.try_lock() == false) {
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retval = SDL_MUTEX_TIMEDOUT;
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}
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return retval;
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}
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/* Unlock the mutex */
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extern "C" int
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SDL_UnlockMutex(SDL_mutex *mutex) SDL_NO_THREAD_SAFETY_ANALYSIS /* clang doesn't know about NULL mutexes */
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{
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if (mutex == NULL) {
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return 0;
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}
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mutex->cpp_mutex.unlock();
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return 0;
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}
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/* vi: set ts=4 sw=4 expandtab: */
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