source: trunk/include/sh_pthread.h @ 132

Last change on this file since 132 was 132, checked in by rainer, 12 years ago

Make utility functions thread-safe.

File size: 1.4 KB
Line 
1#ifndef SH_PTHREAD_H
2#define SH_PTHREAD_H
3
4#ifdef HAVE_PTHREAD
5
6#include <pthread.h>
7#define SH_MUTEX(M)                             pthread_mutex_t M
8#define SH_MUTEX_INIT(M,I)                      pthread_mutex_t M = I
9#define SH_MUTEX_STATIC(M,I)                    static pthread_mutex_t M = I
10#define SH_MUTEX_EXTERN(M)                      extern pthread_mutex_t M
11
12#define SH_MUTEX_LOCK(M)                                                   \
13        do {                                                               \
14                int oldtype;                                               \
15                pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, &oldtype);  \
16                pthread_cleanup_push(pthread_mutex_unlock, (void *) &(M)); \
17                pthread_mutex_lock(&(M))
18
19
20#define SH_MUTEX_UNLOCK(M,C)                                               \
21                pthread_cleanup_pop(1);                                    \
22                pthread_setcanceltype(oldtype, NULL);                      \
23        } while (0)
24
25#define SH_MUTEX_LOCK_UNSAFE(M) pthread_mutex_lock(&(M))
26#define SH_MUTEX_UNLOCK_UNSAFE(M) pthread_mutex_unlock(&(M))
27
28#else
29
30#define SH_MUTEX(M)                             void *SH_MUTEX_DUMMY_ ## M
31#define SH_MUTEX_INIT(M,I)                      extern void *SH_MUTEX_DUMMY_ ## M
32#define SH_MUTEX_STATIC(M,I)                    extern void *SH_MUTEX_DUMMY_ ## M
33#define SH_MUTEX_EXTERN(M)                      extern void *SH_MUTEX_DUMMY_ ## M
34#define SH_MUTEX_LOCK(M)                        ((void)0)
35#define SH_MUTEX_UNLOCK(M)                      ((void)0)
36#define SH_MUTEX_LOCK_UNSAFE(M)                 ((void)0)
37#define SH_MUTEX_UNLOCK_UNSAFE(M)               ((void)0)
38
39/* #ifdef HAVE_PTHREAD */
40#endif
41
42/* #ifndef SH_PTHREAD_H */
43#endif
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