Method acquire

gecode/support/thread/thread.hpp:69–78

#endif
  }
  forceinline void
  Mutex::acquire(void) {
#ifdef GECODE_HAS_THREADS
#ifndef GECODE_USE_OSX_UNFAIR_MUTEX
    m.lock();
#else
    os_unfair_lock_lock(&l);
#endif
#endif
  }

  forceinline bool
  Mutex::tryacquire(void) {