cscg22-gearboy

CSCG 2022 Challenge 'Gearboy'
git clone https://git.sinitax.com/sinitax/cscg22-gearboy
Log | Files | Refs | sfeed.txt

SDL_sysmutex.cpp (2602B)

      1/*
      2  Simple DirectMedia Layer
      3  Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
      4
      5  This software is provided 'as-is', without any express or implied
      6  warranty.  In no event will the authors be held liable for any damages
      7  arising from the use of this software.
      8
      9  Permission is granted to anyone to use this software for any purpose,
     10  including commercial applications, and to alter it and redistribute it
     11  freely, subject to the following restrictions:
     12
     13  1. The origin of this software must not be misrepresented; you must not
     14     claim that you wrote the original software. If you use this software
     15     in a product, an acknowledgment in the product documentation would be
     16     appreciated but is not required.
     17  2. Altered source versions must be plainly marked as such, and must not be
     18     misrepresented as being the original software.
     19  3. This notice may not be removed or altered from any source distribution.
     20*/
     21#include "../../SDL_internal.h"
     22
     23extern "C" {
     24#include "SDL_thread.h"
     25#include "SDL_systhread_c.h"
     26#include "SDL_log.h"
     27}
     28
     29#include <system_error>
     30
     31#include "SDL_sysmutex_c.h"
     32#include <Windows.h>
     33
     34
     35/* Create a mutex */
     36extern "C"
     37SDL_mutex *
     38SDL_CreateMutex(void)
     39{
     40    /* Allocate and initialize the mutex */
     41    try {
     42        SDL_mutex * mutex = new SDL_mutex;
     43        return mutex;
     44    } catch (std::system_error & ex) {
     45        SDL_SetError("unable to create a C++ mutex: code=%d; %s", ex.code(), ex.what());
     46        return NULL;
     47    } catch (std::bad_alloc &) {
     48        SDL_OutOfMemory();
     49        return NULL;
     50    }
     51}
     52
     53/* Free the mutex */
     54extern "C"
     55void
     56SDL_DestroyMutex(SDL_mutex * mutex)
     57{
     58    if (mutex) {
     59        delete mutex;
     60    }
     61}
     62
     63/* Lock the semaphore */
     64extern "C"
     65int
     66SDL_mutexP(SDL_mutex * mutex)
     67{
     68    if (mutex == NULL) {
     69        SDL_SetError("Passed a NULL mutex");
     70        return -1;
     71    }
     72
     73    try {
     74        mutex->cpp_mutex.lock();
     75        return 0;
     76    } catch (std::system_error & ex) {
     77        SDL_SetError("unable to lock a C++ mutex: code=%d; %s", ex.code(), ex.what());
     78        return -1;
     79    }
     80}
     81
     82/* TryLock the mutex */
     83int
     84SDL_TryLockMutex(SDL_mutex * mutex)
     85{
     86    int retval = 0;
     87    if (mutex == NULL) {
     88        return SDL_SetError("Passed a NULL mutex");
     89    }
     90
     91    if (mutex->cpp_mutex.try_lock() == false) {
     92        retval = SDL_MUTEX_TIMEDOUT;
     93    }
     94    return retval;
     95}
     96
     97/* Unlock the mutex */
     98extern "C"
     99int
    100SDL_mutexV(SDL_mutex * mutex)
    101{
    102    if (mutex == NULL) {
    103        SDL_SetError("Passed a NULL mutex");
    104        return -1;
    105    }
    106
    107    mutex->cpp_mutex.unlock();
    108    return 0;
    109}
    110
    111/* vi: set ts=4 sw=4 expandtab: */