53   int errorcode = pthread_mutexattr_init(&attr);  in MutexImpl()  local
54   assert(errorcode == 0); (void)errorcode;  in MutexImpl()
59   errorcode = pthread_mutexattr_settype(&attr, kind);  in MutexImpl()
60   assert(errorcode == 0);  in MutexImpl()
63   errorcode = pthread_mutex_init(mutex, &attr);  in MutexImpl()
64   assert(errorcode == 0);  in MutexImpl()
67   errorcode = pthread_mutexattr_destroy(&attr);  in MutexImpl()
68   assert(errorcode == 0);  in MutexImpl()
89   int errorcode = pthread_mutex_lock(mutex);  in acquire()  local
90   return errorcode == 0;  in acquire()
99   int errorcode = pthread_mutex_unlock(mutex);  in release()  local
100   return errorcode == 0;  in release()
109   int errorcode = pthread_mutex_trylock(mutex);  in tryacquire()  local
110   return errorcode == 0;  in tryacquire()