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/***************************************************************************
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/***************************************************************************
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 *   Copyright (C) November 29, 2008 by Mattias Runge                             *
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 *   Copyright (C) November 29, 2008 by Mattias Runge                             *
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 *   mattias@runge.se                                                      *
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 *   mattias@runge.se                                                      *
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 *   semaphore.h                                            *
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 *   semaphore.h                                            *
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 *                                                                         *
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 *                                                                         *
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 *   This program is free software; you can redistribute it and/or modify  *
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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 General Public License as published by  *
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 *   it under the terms of the GNU General Public License as published by  *
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 *   the Free Software Foundation; either version 2 of the License, or     *
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 *   the Free Software Foundation; either version 2 of the License, or     *
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 *   (at your option) any later version.                                   *
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 *   (at your option) any later version.                                   *
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 *                                                                         *
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 *                                                                         *
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 *   This program is distributed in the hope that it will be useful,       *
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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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 *   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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 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
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 *   GNU General Public License for more details.                          *
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 *   GNU General Public License for more details.                          *
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 *                                                                         *
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 *                                                                         *
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 *   You should have received a copy of the GNU General Public License     *
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 *   You should have received a copy of the GNU General Public License     *
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 *   along with this program; if not, write to the                         *
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 *   along with this program; if not, write to the                         *
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 *   Free Software Foundation, Inc.,                                       *
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 *   Free Software Foundation, Inc.,                                       *
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 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
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 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
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 ***************************************************************************/
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 ***************************************************************************/
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#ifndef _SEMAPHORE_H
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#ifndef _SEMAPHORE_H
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#define _SEMAPHORE_H
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#define _SEMAPHORE_H
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#include "mutex.h"
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#include "mutex.h"
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#include <sys/time.h>
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class Semaphore : public Mutex
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class Semaphore : public Mutex
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{
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{
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public:
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public:
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    Semaphore() { pthread_cond_init(&myCondition, NULL); };
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    Semaphore() { pthread_cond_init(&myCondition, NULL); };
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    ~Semaphore() { pthread_cond_destroy(&myCondition); };
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    ~Semaphore() { pthread_cond_destroy(&myCondition); };
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    int broadcast() { return pthread_cond_broadcast(&myCondition); };
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    int broadcast() { return pthread_cond_broadcast(&myCondition); };
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    int wait() { return pthread_cond_wait(&myCondition, &myMutex); };
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    int wait() { return pthread_cond_wait(&myCondition, &myMutex); };
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    int wait(int timeout) // Returns ETIMEDOUT on timeout
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    {
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        gettimeofday(&myTimeval, NULL);
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         /* Convert from timeval to timespec */
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        myTimespec.tv_sec  = myTimeval.tv_sec;
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        myTimespec.tv_nsec = myTimeval.tv_usec * 1000;
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        myTimespec.tv_sec += timeout;
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        return pthread_cond_timedwait(&myCondition, &myMutex, &myTimespec);
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    }
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protected:
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protected:
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    pthread_cond_t myCondition;
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    pthread_cond_t myCondition;
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    struct timespec myTimespec;
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    struct timeval myTimeval;
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};
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};
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#endif  /* _SEMAPHORE_H */
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#endif  /* _SEMAPHORE_H */
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