Subversion Repositories HomeAutomation

Rev

Rev 974 | Only display areas with differences | Regard whitespace | Details | Blame | Last modification | View Log | SVN | RSS feed

Rev 974 Rev 976
1 
/***************************************************************************
 1 
/***************************************************************************
2 
 *   Copyright (C) November 29, 2008 by Mattias Runge                             *
 2 
 *   Copyright (C) November 29, 2008 by Mattias Runge                             *
3 
 *   mattias@runge.se                                                      *
 3 
 *   mattias@runge.se                                                      *
4 
 *   semaphore.h                                            *
 4 
 *   semaphore.h                                            *
5 
 *                                                                         *
 5 
 *                                                                         *
6 
 *   This program is free software; you can redistribute it and/or modify  *
 6 
 *   This program is free software; you can redistribute it and/or modify  *
7 
 *   it under the terms of the GNU General Public License as published by  *
 7 
 *   it under the terms of the GNU General Public License as published by  *
8 
 *   the Free Software Foundation; either version 2 of the License, or     *
 8 
 *   the Free Software Foundation; either version 2 of the License, or     *
9 
 *   (at your option) any later version.                                   *
 9 
 *   (at your option) any later version.                                   *
10 
 *                                                                         *
 10 
 *                                                                         *
11 
 *   This program is distributed in the hope that it will be useful,       *
 11 
 *   This program is distributed in the hope that it will be useful,       *
12 
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 12 
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
13 
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 13 
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
14 
 *   GNU General Public License for more details.                          *
 14 
 *   GNU General Public License for more details.                          *
15 
 *                                                                         *
 15 
 *                                                                         *
16 
 *   You should have received a copy of the GNU General Public License     *
 16 
 *   You should have received a copy of the GNU General Public License     *
17 
 *   along with this program; if not, write to the                         *
 17 
 *   along with this program; if not, write to the                         *
18 
 *   Free Software Foundation, Inc.,                                       *
 18 
 *   Free Software Foundation, Inc.,                                       *
19 
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 19 
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
20 
 ***************************************************************************/
 20 
 ***************************************************************************/
21 
 
 21 
 
22 
#ifndef _SEMAPHORE_H
 22 
#ifndef _SEMAPHORE_H
23 
#define _SEMAPHORE_H
 23 
#define _SEMAPHORE_H
24 
 
 24 
 
25 
#include "mutex.h"
 25 
#include "mutex.h"
26 
#include <sys/time.h>
 26 
#include <sys/time.h>
27 
 
 27 
 
28 
class Semaphore : public Mutex
 28 
class Semaphore : public Mutex
29 
{
 29 
{
30 
public:
 30 
public:
31 
    Semaphore() { pthread_cond_init(&myCondition, NULL); };
 31 
    Semaphore() { pthread_cond_init(&myCondition, NULL); };
32 
    ~Semaphore() { pthread_cond_destroy(&myCondition); };
 32 
    ~Semaphore() { pthread_cond_destroy(&myCondition); };
33 
 
 33 
 
34 
    int broadcast() { return pthread_cond_broadcast(&myCondition); };
 34 
    int broadcast() { return pthread_cond_broadcast(&myCondition); };
35 
    int wait() { return pthread_cond_wait(&myCondition, &myMutex); };
 35 
    int wait() { return pthread_cond_wait(&myCondition, &myMutex); };
36 
    int wait(int timeout) // Returns ETIMEDOUT on timeout
 36 
    int wait(int timeout) // Returns ETIMEDOUT on timeout
37 
    {
 37 
    {
- 
 
 38 
        struct timeval timeval;
- 
 
 39 
 
38 
        gettimeofday(&myTimeval, NULL);
 40 
        gettimeofday(&timeval, NULL);
39 
 
 41 
 
40 
         /* Convert from timeval to timespec */
 42 
         /* Convert from timeval to timespec */
41 
        myTimespec.tv_sec  = myTimeval.tv_sec;
 43 
        myTimespec.tv_sec  = timeval.tv_sec;
42 
        myTimespec.tv_nsec = myTimeval.tv_usec * 1000;
 44 
        myTimespec.tv_nsec = timeval.tv_usec * 1000;
43 
        myTimespec.tv_sec += timeout;
 45 
        myTimespec.tv_sec += timeout;
44 
 
 46 
 
45 
        return pthread_cond_timedwait(&myCondition, &myMutex, &myTimespec);
 47 
        return pthread_cond_timedwait(&myCondition, &myMutex, &myTimespec);
46 
    }
 48 
    }
47 
 
 49 
 
48 
protected:
 50 
protected:
49 
    pthread_cond_t myCondition;
 51 
    pthread_cond_t myCondition;
50 
    struct timespec myTimespec;
 52 
    struct timespec myTimespec;
51 
    struct timeval myTimeval;
 - 
 
- 
 
 53 
   
52 
};
 54 
};
53 
 
 55 
 
54 
 
 56 
 
55 
#endif  /* _SEMAPHORE_H */
 57 
#endif  /* _SEMAPHORE_H */
56 
 
 58 
 
57 
 
 59