/[libspopc]/mutex.h
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Annotation of /mutex.h

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Revision 4 - (hide annotations)
Thu Oct 15 23:10:35 2009 UTC (11 years ago) by ben
File MIME type: text/plain
File size: 1754 byte(s)
added possiblilty to use POSIX mutexes instead of unix semaphores
1 ben 1 /* this is mutex.h file, part of the libspopc library sources
2     * copyright © 2002- Benoit Rouits <brouits@free.fr>
3     * released under the terms of the GNU Lesser General Public Licence.
4     *
5     * libspopc offers simple API for a pop3 client.
6     * See RFC 1725 for pop3 specifications.
7 ben 2 * more information on http://herewe.servebeer.com/libspopc/
8 ben 1 *
9     * This library is free software; you can redistribute it and/or
10     * modify it under the terms of the GNU Lesser General Public
11     * License as published by the Free Software Foundation; either
12     * version 2.1 of the License, or (at your option) any later version.
13     *
14     * This library is distributed in the hope that it will be useful,
15     * but WITHOUT ANY WARRANTY; without even the implied warranty of
16     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17     * Lesser General Public License for more details.
18     *
19     * You should have received a copy of the GNU Lesser General Public
20     * License along with this library; if not, write to the Free Software
21     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22     */
23    
24     #ifndef MUTEX_H
25     #define MUTEX_H
26    
27 ben 4 #ifdef USE_SEM /* no posix thread mutex */
28     #include <semaphore.h>
29     typedef sem_t mutex; /* use unix rt semaphores from librt */
30     #else
31     #ifdef USE_PMUTEX
32     #include <pthread.h>
33     typedef pthread_mutex_t mutex; /* use posix thread mutexes */
34     #else
35     typedef int mutex;
36     #endif
37     #endif
38 ben 1
39     /* initializes a thread-wide mutex */
40     int mutex_init(mutex* id);
41    
42     /* acquire the given mutex to enter in a critical section */
43     int mutex_in (mutex* id);
44    
45     /* quit the critical section, by releasing the given mutex */
46     int mutex_out (mutex* id);
47    
48     /* clean the mutex, thus re-initable by mutex_init() */
49     int mutex_clean(mutex* id);
50    
51     #endif

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