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/*
Copyright (C) 2005-2009 Michel de Boer <michel@twinklephone.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef _H_SEMAPHORE
#define _H_SEMAPHORE
#include <semaphore.h>
class t_semaphore {
private:
sem_t sem;
public:
// Throws a string exception (error message) when failing.
t_semaphore(unsigned int value);
~t_semaphore();
// Throws a string exception (error message) when failing.
void up(void);
void down(void);
// Returns true if downing the semaphore succeeded.
// Returns false if the semaphore was zero already.
bool try_down(void);
};
#endif
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