Function do_mutex_unlock

thread/thread.cpp:1737–1744

        return (int)ret - 1;
    }
    inline void do_mutex_unlock(mutex* m)
    {
        SCOPED_LOCK(m->splock);
        ScopedLockHead h(m);
        m->owner.store(h);
        if (h)
            prelocked_thread_interrupt(h, -1);
    }
    static void mutex_unlock(void* m_)
    {
        if (!m_) return;