nsz Git - musl/blob - src/thread/pthread_rwlock_timedrdlock.c

   1 #include "pthread_impl.h"
   2
   3 int pthread_rwlock_timedrdlock(pthread_rwlock_t *rw, const struct timespec *at)
   4 {
   5         int w=0;
   6         while (pthread_rwlock_tryrdlock(rw)) {
   7                 if (!w) a_inc(&rw->_rw_waiters), w++;
   8                 if (__timedwait(&rw->_rw_wrlock, 1, CLOCK_REALTIME, at, 0)==ETIMEDOUT) {
   9                         if (w) a_dec(&rw->_rw_waiters);
  10                         return ETIMEDOUT;
  11                 }
  12         }
  13         if (w) a_dec(&rw->_rw_waiters);
  14         return 0;
  15 }