SDL
2.0
SDL_sysmutex.cpp
Go to the documentation of this file.
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/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2020 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_thread.h
"
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#include "
SDL_systhread_c.h
"
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#include "
SDL_log.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"
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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"
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void
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SDL_DestroyMutex
(
SDL_mutex
*
mutex
)
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{
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if
(
mutex
) {
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delete
mutex
;
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}
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}
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/* Lock the semaphore */
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extern
"C"
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int
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SDL_mutexP
(
SDL_mutex
*
mutex
)
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{
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if
(
mutex
==
NULL
) {
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SDL_SetError
(
"Passed a NULL mutex"
);
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return
-1;
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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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SDL_SetError
(
"unable to lock a C++ mutex: code=%d; %s"
, ex.code(), ex.what());
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return
-1;
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}
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}
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/* TryLock the mutex */
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int
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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
SDL_SetError
(
"Passed a NULL mutex"
);
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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"
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int
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SDL_mutexV
(
SDL_mutex
*
mutex
)
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{
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if
(
mutex
==
NULL
) {
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SDL_SetError
(
"Passed a NULL mutex"
);
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return
-1;
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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: */
NULL
#define NULL
Definition:
begin_code.h:167
SDL_mutexP
int SDL_mutexP(SDL_mutex *mutex)
Definition:
SDL_sysmutex.cpp:66
SDL_log.h
SDL_mutex
Definition:
SDL_sysmutex.c:30
mutex
static SDL_mutex * mutex
Definition:
testlock.c:23
SDL_DestroyMutex
void SDL_DestroyMutex(SDL_mutex *mutex)
Definition:
SDL_sysmutex.cpp:56
SDL_MUTEX_TIMEDOUT
#define SDL_MUTEX_TIMEDOUT
Definition:
SDL_mutex.h:44
SDL_mutexV
int SDL_mutexV(SDL_mutex *mutex)
Definition:
SDL_sysmutex.cpp:100
SDL_thread.h
retval
SDL_bool retval
Definition:
testgamecontroller.c:65
SDL_systhread_c.h
SDL_CreateMutex
SDL_mutex * SDL_CreateMutex(void)
Definition:
SDL_sysmutex.cpp:38
SDL_mutex::cpp_mutex
std::recursive_mutex cpp_mutex
Definition:
SDL_sysmutex_c.h:27
SDL_OutOfMemory
#define SDL_OutOfMemory()
Definition:
SDL_error.h:52
SDL_SetError
#define SDL_SetError
Definition:
SDL_dynapi_overrides.h:30
SDL_TryLockMutex
int SDL_TryLockMutex(SDL_mutex *mutex)
Definition:
SDL_sysmutex.cpp:84
SDL_sysmutex_c.h
src
thread
stdcpp
SDL_sysmutex.cpp
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