semaphore.h

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/*
Minetest
Copyright (C) 2013 sapier <sapier AT gmx DOT net>
 
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.
 
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
 
#pragma once
 
#if defined(_WIN32)
#include <windows.h>
#elif defined(__MACH__) && defined(__APPLE__)
#include <mach/semaphore.h>
#else
#include <semaphore.h>
#endif
 
#include "util/basic_macros.h"
 
class Semaphore
{
public:
    Semaphore(int val = 0);
    ~Semaphore();
 
    DISABLE_CLASS_COPY(Semaphore);
 
    void post(unsigned int num = 1);
    void wait();
    bool wait(unsigned int time_ms);
 
private:
#if defined(WIN32)
    HANDLE semaphore;
#elif defined(__MACH__) && defined(__APPLE__)
    semaphore_t semaphore;
#else
    sem_t semaphore;
#endif
};