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

   1 #include "pthread_impl.h"
   2
   3 int pthread_mutex_unlock(pthread_mutex_t *m)
   4 {
   5         if (m->_m_type != PTHREAD_MUTEX_NORMAL) {
   6                 if (!m->_m_lock || m->_m_lock != __pthread_self()->tid)
   7                         return EPERM;
   8                 if (m->_m_type == PTHREAD_MUTEX_RECURSIVE && --m->_m_count)
   9                         return 0;
  10         }
  11
  12         m->_m_lock = 0;
  13         if (m->_m_waiters) __wake(&m->_m_lock, 1, 0);
  14         return 0;
  15 }