Unlocks mutex. Another thread will be allowed to lock mutex only
when it has been unlocked as many times as it had been locked
before. If mutex is completely unlocked and another thread is
blocked in a g_static_rec_mutex_lock() call for mutex, it will be
woken and can lock mutex itself.
Unlocks mutex. Another thread will be allowed to lock mutex only when it has been unlocked as many times as it had been locked before. If mutex is completely unlocked and another thread is blocked in a g_static_rec_mutex_lock() call for mutex, it will be woken and can lock mutex itself.