diff options
Diffstat (limited to 'libpthread/linuxthreads/condvar.c')
| -rw-r--r-- | libpthread/linuxthreads/condvar.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/libpthread/linuxthreads/condvar.c b/libpthread/linuxthreads/condvar.c index 35daacf15..6ac1622da 100644 --- a/libpthread/linuxthreads/condvar.c +++ b/libpthread/linuxthreads/condvar.c @@ -275,6 +275,7 @@ libpthread_hidden_def(pthread_cond_broadcast) int pthread_condattr_init(pthread_condattr_t *attr attribute_unused) { + memset (attr, '\0', sizeof (*attr)); return 0; } libpthread_hidden_def(pthread_condattr_init) @@ -302,3 +303,50 @@ int pthread_condattr_setpshared (pthread_condattr_t *attr attribute_unused, int return 0; } + +int pthread_condattr_getclock (const pthread_condattr_t *attr, clockid_t *clock_id) +{ + *clock_id = (((((const struct pthread_condattr *) attr)->value) >> 1) + & ((1 << COND_NWAITERS_SHIFT) - 1)); + return 0; +} + +int pthread_condattr_setclock (pthread_condattr_t *attr, clockid_t clock_id) +{ + /* Only a few clocks are allowed. CLOCK_REALTIME is always allowed. + CLOCK_MONOTONIC only if the kernel has the necessary support. */ + if (clock_id == CLOCK_MONOTONIC) + { +#ifndef __ASSUME_POSIX_TIMERS +# ifdef __NR_clock_getres + /* Check whether the clock is available. */ + static int avail; + + if (avail == 0) + { + struct timespec ts; + + INTERNAL_SYSCALL_DECL (err); + int val; + val = INTERNAL_SYSCALL (clock_getres, err, 2, CLOCK_MONOTONIC, &ts); + avail = INTERNAL_SYSCALL_ERROR_P (val, err) ? -1 : 1; + } + + if (avail < 0) +# endif + /* Not available. */ + return EINVAL; +#endif + } + else if (clock_id != CLOCK_REALTIME) + /* If more clocks are allowed some day the storing of the clock ID + in the pthread_cond_t structure needs to be adjusted. */ + return EINVAL; + + int *valuep = &((struct pthread_condattr *) attr)->value; + + *valuep = ((*valuep & ~(((1 << COND_NWAITERS_SHIFT) - 1) << 1)) + | (clock_id << 1)); + + return 0; +} |