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

   1 #include "pthread_impl.h"
   2
   3 int pthread_rwlock_unlock(pthread_rwlock_t *rw)
   4 {
   5         struct pthread *self = pthread_self();
   6         if (rw->_rw_owner == self->tid) {
   7                 rw->_rw_owner = 0;
   8                 a_store(&rw->_rw_wrlock, 0);
   9                 if (rw->_rw_waiters)
  10                         __wake(&rw->_rw_wrlock, -1, 0);
  11                 return 0;
  12         }
  13         a_dec(&rw->_rw_readers);
  14         if (rw->_rw_waiters && !rw->_rw_readers)
  15                 __wake(&rw->_rw_readers, 1, 0);
  16         return 0;
  17 }