3 |
* LinuxSampler - modular, streaming capable sampler * |
* LinuxSampler - modular, streaming capable sampler * |
4 |
* * |
* * |
5 |
* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck * |
* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck * |
6 |
|
* Copyright (C) 2005 - 2016 Christian Schoenebeck * |
7 |
* * |
* * |
8 |
* This program is free software; you can redistribute it and/or modify * |
* This program is free software; you can redistribute it and/or modify * |
9 |
* it under the terms of the GNU General Public License as published by * |
* it under the terms of the GNU General Public License as published by * |
21 |
* MA 02111-1307 USA * |
* MA 02111-1307 USA * |
22 |
***************************************************************************/ |
***************************************************************************/ |
23 |
|
|
24 |
|
#ifdef HAVE_CONFIG_H |
25 |
|
# include <config.h> |
26 |
|
#endif |
27 |
|
|
28 |
|
#if AC_APPLE_UNIVERSAL_BUILD // maybe do this include for all Apple ones (defined(__APPLE__))? |
29 |
|
# include <sys/cdefs.h> // defines the system macros checked below |
30 |
|
#endif |
31 |
|
|
32 |
|
#ifndef _GNU_SOURCE |
33 |
|
# define _GNU_SOURCE 1 /* so _XOPEN_SOURCE will be defined by features.h */ |
34 |
|
#endif |
35 |
|
|
36 |
|
#ifdef HAVE_FEATURES_H |
37 |
|
# include <features.h> |
38 |
|
#endif |
39 |
|
|
40 |
|
#if !defined(WIN32) |
41 |
|
# if !defined(_XOPEN_SOURCE) || _XOPEN_SOURCE < 500 |
42 |
|
# undef _XOPEN_SOURCE |
43 |
|
# define _XOPEN_SOURCE 500 /* to define PTHREAD_MUTEX_ERRORCHECK */ |
44 |
|
# if (!defined(POSIX_C_SOURCE) || POSIX_C_SOURCE < 199801L) && !defined(__DARWIN_UNIX03) |
45 |
|
# warning "Seems you don't have a UNIX98 compatible system." |
46 |
|
# warning "Please run LinuxSampler's selftest to make sure this won't be a problem!" |
47 |
|
# warning "(compile tests with 'make tests', run them with 'src/testcases/linuxsamplertest')" |
48 |
|
# endif |
49 |
|
# endif |
50 |
|
#endif |
51 |
|
|
52 |
#include <iostream> |
#include <iostream> |
53 |
|
#include <errno.h> |
54 |
|
#include <stdlib.h> /* for exit(int) */ |
55 |
|
|
56 |
#include "Mutex.h" |
#include "Mutex.h" |
57 |
|
|
58 |
|
namespace LinuxSampler { |
59 |
|
|
60 |
Mutex::Mutex() { |
Mutex::Mutex() { |
61 |
|
#if defined(WIN32) |
62 |
|
hMutex = CreateMutex( NULL, FALSE, NULL); |
63 |
|
if (hMutex == NULL) { |
64 |
|
std::cerr << "Mutex Constructor: Fatal error - CreateMutex error " << GetLastError() << "\n"; |
65 |
|
exit(1); |
66 |
|
} |
67 |
|
#else |
68 |
|
pthread_mutexattr_init(&__posix_mutexattr); |
69 |
|
|
70 |
|
// the following function call only works on UNIX98 compatible systems |
71 |
|
#if (_XOPEN_SOURCE > 500) || defined(__APPLE__) |
72 |
|
// Mac OS X Note: 10.4 (and later) does support PTHREAD_MUTEX_ERRORCHECK, and |
73 |
|
// actually LinuxSampler does not work if this call is omitted. However, |
74 |
|
// defining _XOPEN_SOURCE macro seems to cause other problems. As a workaround, |
75 |
|
// the symbol __APPLE__ is checked here. There should be a better solution |
76 |
|
// to this problem. (Toshi Nagata, 27 Mar 2007) |
77 |
if (pthread_mutexattr_settype(&__posix_mutexattr, PTHREAD_MUTEX_ERRORCHECK)) { |
if (pthread_mutexattr_settype(&__posix_mutexattr, PTHREAD_MUTEX_ERRORCHECK)) { |
78 |
std::cout << "Mutex Constructor: Fatal error - unable to pthread_mutexattr_settype(PTHREAD_MUTEX_ERRORCHECK)\n" << std::flush; |
std::cerr << "Mutex Constructor: Fatal error - unable to pthread_mutexattr_settype(PTHREAD_MUTEX_ERRORCHECK)\n" << std::flush; |
79 |
exit(-1); |
exit(-1); |
80 |
} |
} |
81 |
|
#endif |
82 |
pthread_mutex_init(&__posix_mutex, &__posix_mutexattr); |
pthread_mutex_init(&__posix_mutex, &__posix_mutexattr); |
83 |
|
#endif |
84 |
} |
} |
85 |
|
|
86 |
Mutex::~Mutex() { |
Mutex::~Mutex() { |
87 |
|
#if defined(WIN32) |
88 |
|
CloseHandle(hMutex); |
89 |
|
#else |
90 |
pthread_mutex_destroy(&__posix_mutex); |
pthread_mutex_destroy(&__posix_mutex); |
91 |
|
pthread_mutexattr_destroy(&__posix_mutexattr); |
92 |
|
#endif |
93 |
} |
} |
94 |
|
|
95 |
void Mutex::Lock() { |
void Mutex::Lock() { |
96 |
|
#if defined(WIN32) |
97 |
|
WaitForSingleObject(hMutex, INFINITE); |
98 |
|
#else |
99 |
pthread_mutex_lock(&__posix_mutex); |
pthread_mutex_lock(&__posix_mutex); |
100 |
|
#endif |
101 |
|
} |
102 |
|
|
103 |
|
bool Mutex::Trylock() { |
104 |
|
#if defined(WIN32) |
105 |
|
if( WaitForSingleObject(hMutex, 0) == WAIT_TIMEOUT) return false; |
106 |
|
return true; |
107 |
|
#else |
108 |
|
if (pthread_mutex_trylock(&__posix_mutex) == EBUSY) |
109 |
|
return false; |
110 |
|
return true; |
111 |
|
#endif |
112 |
} |
} |
113 |
|
|
114 |
void Mutex::Unlock() { |
void Mutex::Unlock() { |
115 |
|
#if defined(WIN32) |
116 |
|
ReleaseMutex(hMutex); |
117 |
|
#else |
118 |
pthread_mutex_unlock(&__posix_mutex); |
pthread_mutex_unlock(&__posix_mutex); |
119 |
|
#endif |
120 |
} |
} |
121 |
|
|
122 |
|
} // namespace LinuxSampler |