2 * mono-semaphore.c: mono-semaphore functions
5 * Gonzalo Paniagua Javier <gonzalo@novell.com>
7 * (C) 2010 Novell, Inc.
12 #include "utils/mono-semaphore.h"
13 #ifdef HAVE_SYS_TIME_H
20 #if (defined(HAVE_SEMAPHORE_H) || defined(USE_MACH_SEMA))
21 /* sem_* or semaphore_* functions in use */
23 # define TIMESPEC mach_timespec_t
24 # define WAIT_BLOCK(a,b) semaphore_timedwait (*(a), *(b))
25 # elif defined(__OpenBSD__)
26 # define TIMESPEC struct timespec
27 # define WAIT_BLOCK(a) sem_trywait(a)
29 # define TIMESPEC struct timespec
30 # define WAIT_BLOCK(a,b) sem_timedwait (a, b)
33 #define NSEC_PER_SEC 1000000000
35 mono_sem_timedwait (MonoSemType *sem, guint32 timeout_ms, gboolean alertable)
40 #if defined(__OpenBSD__)
46 return (!sem_trywait (sem));
48 if (timeout_ms == (guint32) 0xFFFFFFFF)
49 return mono_sem_wait (sem, alertable);
51 gettimeofday (&t, NULL);
52 ts.tv_sec = timeout_ms / 1000 + t.tv_sec;
53 ts.tv_nsec = (timeout_ms % 1000) * 1000000 + t.tv_usec * 1000;
54 while (ts.tv_nsec > NSEC_PER_SEC) {
55 ts.tv_nsec -= NSEC_PER_SEC;
58 #if defined(__OpenBSD__)
61 if ((res = WAIT_BLOCK (sem)) == 0)
67 usleep (ts.tv_nsec / 1000);
72 while ((res = WAIT_BLOCK (sem, &ts) == -1) && errno == EINTR) {
73 struct timeval current;
76 gettimeofday (¤t, NULL);
78 ts.tv_sec -= (current.tv_sec - t.tv_sec);
79 ts.tv_nsec -= (current.tv_usec - t.tv_usec) * 1000;
85 ts.tv_nsec += NSEC_PER_SEC;
98 mono_sem_wait (MonoSemType *sem, gboolean alertable)
101 #ifndef USE_MACH_SEMA
102 while ((res = sem_wait (sem) == -1) && errno == EINTR)
104 while ((res = semaphore_wait (*sem) == -1) && errno == EINTR)
114 mono_sem_post (MonoSemType *sem)
117 #ifndef USE_MACH_SEMA
118 while ((res = sem_post (sem) == -1) && errno == EINTR);
120 while ((res = semaphore_signal (*sem) == -1) && errno == EINTR);
126 /* Windows or io-layer functions in use */
128 mono_sem_wait (MonoSemType *sem, gboolean alertable)
130 return mono_sem_timedwait (sem, INFINITE, alertable);
134 mono_sem_timedwait (MonoSemType *sem, guint32 timeout_ms, gboolean alertable)
138 res = WaitForSingleObjectEx (*sem, timeout_ms, alertable);
142 case WAIT_IO_COMPLETION:
145 // WAIT_TIMEOUT and WAIT_FAILED
152 mono_sem_post (MonoSemType *sem)
154 if (!ReleaseSemaphore (*sem, 1, NULL))