1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
/*
* Copyright (c) 2000, 2001, 2002
* Mario Sergio Fujikawa Ferreira <lioux@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#ifdef HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif
#include <stdlib.h>
# include <pthread.h>
/*
* Use a mutex under BSD systems to avoid problems with semaphores
* blocking all the threads since BSD have MIT pthreads user space
* threads. If not BSD, use some stubs that do nothing. Since these
* stubs are empty, most modern compilers will simply add a NOP at
* the calling point.
*/
# if (defined(BSD) && (BSD >= 199103))
int
lp_mutex_init_ (pthread_mutex_t ** mutex,
const pthread_mutexattr_t *attr)
{
pthread_mutex_t * mutex_temp;
if ( (mutex_temp = \
(pthread_mutex_t *) malloc (sizeof(pthread_mutex_t))) ) {
if ( (pthread_mutex_init(mutex_temp, attr)) == 0) {
(*mutex) = mutex_temp;
return (1);
} else {
return (0);
}
} else {
/* Not enough memory */
return (-1);
}
}
int
lp_mutex_lock_ (pthread_mutex_t * mutex)
{
if ( (pthread_mutex_lock(mutex)) == 0) {
return (1);
} else {
return (0);
}
}
int
lp_mutex_unlock_ (pthread_mutex_t * mutex)
{
if ( (pthread_mutex_unlock(mutex)) == 0) {
return (1);
} else {
return (0);
}
}
int
lp_mutex_destroy_ (pthread_mutex_t ** mutex)
{
if ( (pthread_mutex_destroy(*mutex)) == 0) {
free (*mutex);
return (1);
} else {
return (0);
}
}
# else /* !(defined(BSD) && (BSD >= 199103)) */
int
lp_mutex_init_ (pthread_mutex_t ** mutex,
const pthread_mutexattr_t *attr) {}
int
lp_mutex_lock_ (pthread_mutex_t * mutex) {}
int
lp_mutex_unlock_ (pthread_mutex_t * mutex) {}
int
lp_mutex_destroy_ (pthread_mutex_t ** mutex) {}
# endif /* (defined(BSD) && (BSD >= 199103)) */
|
