/[svn]/linuxsampler/trunk/src/common/Mutex.cpp
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Annotation of /linuxsampler/trunk/src/common/Mutex.cpp

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Revision 290 - (hide annotations) (download)
Wed Oct 20 03:02:35 2004 UTC (19 years, 5 months ago) by senkov
File size: 2946 byte(s)
* Quoted warnings to avoid unmatched single quote.

1 schoenebeck 53 /***************************************************************************
2     * *
3     * LinuxSampler - modular, streaming capable sampler *
4     * *
5 schoenebeck 56 * Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6 schoenebeck 53 * *
7     * This program is free software; you can redistribute it and/or modify *
8     * it under the terms of the GNU General Public License as published by *
9     * the Free Software Foundation; either version 2 of the License, or *
10     * (at your option) any later version. *
11     * *
12     * This program is distributed in the hope that it will be useful, *
13     * but WITHOUT ANY WARRANTY; without even the implied warranty of *
14     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
15     * GNU General Public License for more details. *
16     * *
17     * You should have received a copy of the GNU General Public License *
18     * along with this program; if not, write to the Free Software *
19     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
20     * MA 02111-1307 USA *
21     ***************************************************************************/
22    
23 schoenebeck 289 #ifndef _GNU_SOURCE
24     # define _GNU_SOURCE 1 /* so _XOPEN_SOURCE will be defined by features.h */
25     #endif
26    
27     #include <features.h>
28    
29     #if !defined(_XOPEN_SOURCE) || _XOPEN_SOURCE < 500
30     # undef _XOPEN_SOURCE
31     # define _XOPEN_SOURCE 500 /* to define PTHREAD_MUTEX_ERRORCHECK */
32 senkov 290 # warning "Seems you don't have a UNIX98 compatible system."
33     # warning "Please run LinuxSampler's selftest to make sure this won't be a problem!"
34     # warning "(compile tests with 'make tests', run them with 'src/testcases/linuxsamplertest')"
35 schoenebeck 289 #endif
36    
37 schoenebeck 53 #include <iostream>
38 capela 268 #include <errno.h>
39 schoenebeck 281 #include <stdlib.h> /* for exit(int) */
40 capela 268
41 schoenebeck 53 #include "Mutex.h"
42    
43     Mutex::Mutex() {
44 schoenebeck 275 // the following function call only works on UNIX98 compatible systems
45 schoenebeck 53 if (pthread_mutexattr_settype(&__posix_mutexattr, PTHREAD_MUTEX_ERRORCHECK)) {
46     std::cout << "Mutex Constructor: Fatal error - unable to pthread_mutexattr_settype(PTHREAD_MUTEX_ERRORCHECK)\n" << std::flush;
47     exit(-1);
48     }
49     pthread_mutex_init(&__posix_mutex, &__posix_mutexattr);
50     }
51    
52     Mutex::~Mutex() {
53     pthread_mutex_destroy(&__posix_mutex);
54     }
55    
56     void Mutex::Lock() {
57     pthread_mutex_lock(&__posix_mutex);
58     }
59    
60 senkov 165 bool Mutex::Trylock() {
61     if (pthread_mutex_trylock(&__posix_mutex) == EBUSY)
62     return false;
63     return true;
64     }
65    
66 schoenebeck 53 void Mutex::Unlock() {
67     pthread_mutex_unlock(&__posix_mutex);
68     }

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