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

   1 #include "pthread_impl.h"
   2
   3 int pthread_rwlock_wrlock(pthread_rwlock_t *rw)
   4 {
   5         int nr;
   6         while (pthread_rwlock_trywrlock(rw)==EAGAIN) {
   7                 if ((nr=rw->_rw_readers))
   8                         __wait(&rw->_rw_readers, &rw->_rw_waiters, nr, 0);
   9                 else
  10                         __wait(&rw->_rw_wrlock, &rw->_rw_waiters, 1, 0);
  11         }
  12         return 0;
  13 }