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)
34 mono_sem_timedwait (MonoSemType *sem, guint32 timeout_ms, gboolean alertable)
39 #if defined(__OpenBSD__)
45 return (!sem_trywait (sem));
47 if (timeout_ms == (guint32) 0xFFFFFFFF)
48 return mono_sem_wait (sem, alertable);
50 gettimeofday (&t, NULL);
51 ts.tv_sec = timeout_ms / 1000 + t.tv_sec;
52 ts.tv_nsec = (timeout_ms % 1000) * 1000000 + t.tv_usec * 1000;
53 while (ts.tv_nsec > 1000000000) {
54 ts.tv_nsec -= 1000000000;
57 #if defined(__OpenBSD__)
60 if ((res = WAIT_BLOCK (sem)) == 0)
66 usleep (ts.tv_nsec / 1000);
71 while ((res = WAIT_BLOCK (sem, &ts) == -1) && errno == EINTR) {
81 mono_sem_wait (MonoSemType *sem, gboolean alertable)
85 while ((res = sem_wait (sem) == -1) && errno == EINTR)
87 while ((res = semaphore_wait (*sem) == -1) && errno == EINTR)
97 mono_sem_post (MonoSemType *sem)
100 #ifndef USE_MACH_SEMA
101 while ((res = sem_post (sem) == -1) && errno == EINTR);
103 while ((res = semaphore_signal (*sem) == -1) && errno == EINTR);
109 /* Windows or io-layer functions in use */
111 mono_sem_wait (MonoSemType *sem, gboolean alertable)
113 return mono_sem_timedwait (sem, INFINITE, alertable);
117 mono_sem_timedwait (MonoSemType *sem, guint32 timeout_ms, gboolean alertable)
121 res = WaitForSingleObjectEx (*sem, timeout_ms, alertable);
125 case WAIT_IO_COMPLETION:
128 // WAIT_TIMEOUT and WAIT_FAILED
135 mono_sem_post (MonoSemType *sem)
137 if (!ReleaseSemaphore (*sem, 1, NULL))