diff options
Diffstat (limited to 'src/thread/pthread_rwlock_timedwrlock.c')
| -rw-r--r-- | src/thread/pthread_rwlock_timedwrlock.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/thread/pthread_rwlock_timedwrlock.c b/src/thread/pthread_rwlock_timedwrlock.c new file mode 100644 index 0000000..9f74964 --- /dev/null +++ b/src/thread/pthread_rwlock_timedwrlock.c @@ -0,0 +1,17 @@ +#include "pthread_impl.h" + +int pthread_rwlock_timedwrlock(pthread_rwlock_t *rw, const struct timespec *at) +{ + int nr, *p, w=0; + while (pthread_rwlock_trywrlock(rw)==EAGAIN) { + if (!w) a_inc(&rw->__waiters), w++; + if ((nr=rw->__readers)) p = &rw->__readers; + else nr=1, p = &rw->__wrlock; + if (__timedwait(p, nr, CLOCK_REALTIME, at, 0)==ETIMEDOUT) { + if (w) a_dec(&rw->__waiters); + return ETIMEDOUT; + } + } + if (w) a_dec(&rw->__waiters); + return 0; +} |