72 lines
1.8 KiB
C++
72 lines
1.8 KiB
C++
/*
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MultiCraft
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Copyright (C) 2013 sapier <sapier AT gmx DOT net>
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Copyright (C) 2023 Dawid Gan <deveee@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 3.0 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "threading/sdl_semaphore.h"
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#ifdef _IRR_COMPILE_WITH_SDL_DEVICE_
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#include <cassert>
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#define UNUSED(expr) \
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do { \
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(void)(expr); \
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} while (0)
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Semaphore::Semaphore(int val)
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{
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semaphore = SDL_CreateSemaphore(val);
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}
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Semaphore::~Semaphore()
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{
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SDL_DestroySemaphore(semaphore);
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}
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void Semaphore::post(unsigned int num)
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{
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assert(num > 0);
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for (unsigned i = 0; i < num; i++) {
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int ret = SDL_SemPost(semaphore);
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assert(!ret);
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UNUSED(ret);
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}
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}
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void Semaphore::wait()
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{
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int ret = SDL_SemWait(semaphore);
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assert(!ret);
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UNUSED(ret);
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}
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bool Semaphore::wait(unsigned int time_ms)
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{
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int ret;
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if (time_ms > 0) {
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ret = SDL_SemWaitTimeout(semaphore, time_ms);
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} else {
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ret = SDL_SemTryWait(semaphore);
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}
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assert(!ret || ret == SDL_MUTEX_TIMEDOUT);
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return !ret;
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}
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#endif
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