src/thread/pthread_mutex_consistent.c

   1 #include "pthread_impl.h"
   2 #include "atomic.h"
   3
   4 int pthread_mutex_consistent(pthread_mutex_t *m)
   5 {
   6         int old = m->_m_lock;
   7         int own = old & 0x3fffffff;
   8         if (!(m->_m_type & 4) || !own || !(old & 0x40000000))
   9                 return EINVAL;
  10         if (own != __pthread_self()->tid)
  11                 return EPERM;
  12         a_and(&m->_m_lock, ~0x40000000);
  13         return 0;
  14 }