Function pthread_mutex_trylock_impl

src/bthread/mutex.cpp:923–925

template <typename Mutex>
BUTIL_FORCE_INLINE int pthread_mutex_trylock_impl(Mutex* mutex) {
    return pthread_mutex_trylock_internal(mutex);
}

template <typename Mutex>
BUTIL_FORCE_INLINE int pthread_mutex_unlock_impl(Mutex* mutex) {