src/common/Mutex.cpp

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
 *                                                                         *
 *   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, write to the Free Software           *
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *
 *   MA  02111-1307  USA                                                   *
 ***************************************************************************/

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#ifndef _GNU_SOURCE
# define _GNU_SOURCE 1 /* so _XOPEN_SOURCE will be defined by features.h */
#endif

#ifdef HAVE_FEATURES_H
# include <features.h>
#endif

#if !defined(_XOPEN_SOURCE) || _XOPEN_SOURCE < 500
# undef _XOPEN_SOURCE
# define _XOPEN_SOURCE 500 /* to define PTHREAD_MUTEX_ERRORCHECK */
# warning "Seems you don't have a UNIX98 compatible system."
# warning "Please run LinuxSampler's selftest to make sure this won't be a problem!"
# warning "(compile tests with 'make tests', run them with 'src/testcases/linuxsamplertest')"
#endif

#include <iostream>
#include <errno.h>
#include <stdlib.h> /* for exit(int) */

#include "Mutex.h"

Mutex::Mutex() {
    // the following function call only works on UNIX98 compatible systems
    #if (_XOPEN_SOURCE > 500)
    if (pthread_mutexattr_settype(&__posix_mutexattr, PTHREAD_MUTEX_ERRORCHECK)) {
        std::cout << "Mutex Constructor: Fatal error - unable to pthread_mutexattr_settype(PTHREAD_MUTEX_ERRORCHECK)\n" << std::flush;
        exit(-1);
    }
    #endif
    pthread_mutex_init(&__posix_mutex, &__posix_mutexattr);
}

Mutex::~Mutex() {
    pthread_mutex_destroy(&__posix_mutex);
}

void Mutex::Lock() {
    pthread_mutex_lock(&__posix_mutex);
}

bool Mutex::Trylock() {
    if (pthread_mutex_trylock(&__posix_mutex) == EBUSY)
            return false;
    return true;
}

void Mutex::Unlock() {
    pthread_mutex_unlock(&__posix_mutex);
}
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	persson	830	#ifdef HAVE_CONFIG_H
24			# include <config.h>
25			#endif
26
27	schoenebeck	289	#ifndef _GNU_SOURCE
28			# define _GNU_SOURCE 1 /* so _XOPEN_SOURCE will be defined by features.h */
29			#endif
30
31	persson	830	#ifdef HAVE_FEATURES_H
32	wylder	819	# include <features.h>
33			#endif
34	schoenebeck	289
35			#if !defined(_XOPEN_SOURCE) \|\| _XOPEN_SOURCE < 500
36			# undef _XOPEN_SOURCE
37			# define _XOPEN_SOURCE 500 /* to define PTHREAD_MUTEX_ERRORCHECK */
38	senkov	290	# warning "Seems you don't have a UNIX98 compatible system."
39			# warning "Please run LinuxSampler's selftest to make sure this won't be a problem!"
40			# warning "(compile tests with 'make tests', run them with 'src/testcases/linuxsamplertest')"
41	schoenebeck	289	#endif
42
43	schoenebeck	53	#include <iostream>
44	capela	268	#include <errno.h>
45	schoenebeck	281	#include <stdlib.h> /* for exit(int) */
46	capela	268
47	schoenebeck	53	#include "Mutex.h"
48
49			Mutex::Mutex() {
50	schoenebeck	275	// the following function call only works on UNIX98 compatible systems
51	schoenebeck	361	#if (_XOPEN_SOURCE > 500)
52	schoenebeck	53	if (pthread_mutexattr_settype(&__posix_mutexattr, PTHREAD_MUTEX_ERRORCHECK)) {
53			std::cout << "Mutex Constructor: Fatal error - unable to pthread_mutexattr_settype(PTHREAD_MUTEX_ERRORCHECK)\n" << std::flush;
54			exit(-1);
55			}
56	schoenebeck	361	#endif
57	schoenebeck	53	pthread_mutex_init(&__posix_mutex, &__posix_mutexattr);
58			}
59
60			Mutex::~Mutex() {
61			pthread_mutex_destroy(&__posix_mutex);
62			}
63
64			void Mutex::Lock() {
65			pthread_mutex_lock(&__posix_mutex);
66			}
67
68	senkov	165	bool Mutex::Trylock() {
69			if (pthread_mutex_trylock(&__posix_mutex) == EBUSY)
70			return false;
71			return true;
72			}
73
74	schoenebeck	53	void Mutex::Unlock() {
75			pthread_mutex_unlock(&__posix_mutex);
76			}