void *__gthread_getspecific (__gthread_key_t key)
int __gthread_setspecific (__gthread_key_t key, const void *ptr)
+ int __gthread_mutex_destroy (__gthread_mutex_t *mutex);
+
int __gthread_mutex_lock (__gthread_mutex_t *mutex);
int __gthread_mutex_trylock (__gthread_mutex_t *mutex);
int __gthread_mutex_unlock (__gthread_mutex_t *mutex);