SDL_sysmutex.cpp
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/*
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"
extern "C" {
#include "SDL_thread.h"
#include "SDL_systhread_c.h"
#include "SDL_log.h"
}
#include <system_error>
#include "SDL_sysmutex_c.h"
#include <Windows.h>
/* Create a mutex */
extern "C"
SDL_mutex *
SDL_CreateMutex(void)
{
/* Allocate and initialize the mutex */
try {
SDL_mutex * mutex = new SDL_mutex;
return mutex;
} catch (std::system_error & ex) {
SDL_SetError("unable to create a C++ mutex: code=%d; %s", ex.code(), ex.what());
return NULL;
} catch (std::bad_alloc &) {
SDL_OutOfMemory();
return NULL;
}
}
/* Free the mutex */
extern "C"
void
SDL_DestroyMutex(SDL_mutex * mutex)
{
if (mutex) {
delete mutex;
}
}
/* Lock the semaphore */
extern "C"
int
SDL_mutexP(SDL_mutex * mutex)
{
if (mutex == NULL) {
SDL_SetError("Passed a NULL mutex");
return -1;
}
try {
mutex->cpp_mutex.lock();
return 0;
} catch (std::system_error & ex) {
SDL_SetError("unable to lock a C++ mutex: code=%d; %s", ex.code(), ex.what());
return -1;
}
}
/* TryLock the mutex */
int
SDL_TryLockMutex(SDL_mutex * mutex)
{
int retval = 0;
if (mutex == NULL) {
return SDL_SetError("Passed a NULL mutex");
}
if (mutex->cpp_mutex.try_lock() == false) {
retval = SDL_MUTEX_TIMEDOUT;
}
return retval;
}
/* Unlock the mutex */
extern "C"
int
SDL_mutexV(SDL_mutex * mutex)
{
if (mutex == NULL) {
SDL_SetError("Passed a NULL mutex");
return -1;
}
mutex->cpp_mutex.unlock();
return 0;
}
/* vi: set ts=4 sw=4 expandtab: */
SDL_DestroyMutex
void SDL_DestroyMutex(SDL_mutex *mutex)
Definition: SDL_sysmutex.cpp:56
SDL_sysmutex_c.h
SDL_log.h
SDL_mutex::cpp_mutex
std::recursive_mutex cpp_mutex
Definition: SDL_sysmutex_c.h:27
mutex
static SDL_mutex * mutex
Definition: testlock.c:23
SDL_mutexP
int SDL_mutexP(SDL_mutex *mutex)
Definition: SDL_sysmutex.cpp:66
SDL_CreateMutex
SDL_mutex * SDL_CreateMutex(void)
Definition: SDL_sysmutex.cpp:38
SDL_MUTEX_TIMEDOUT
#define SDL_MUTEX_TIMEDOUT
Definition: SDL_mutex.h:44
SDL_thread.h
SDL_mutex
Definition: SDL_sysmutex.c:29
retval
SDL_bool retval
Definition: testgamecontroller.c:65
SDL_systhread_c.h
NULL
#define NULL
Definition: begin_code.h:143
SDL_OutOfMemory
#define SDL_OutOfMemory()
Definition: SDL_error.h:52
SDL_SetError
#define SDL_SetError
Definition: SDL_dynapi_overrides.h:36
SDL_TryLockMutex
int SDL_TryLockMutex(SDL_mutex *mutex)
Definition: SDL_sysmutex.cpp:84
SDL_mutexV
int SDL_mutexV(SDL_mutex *mutex)
Definition: SDL_sysmutex.cpp:100