Function mutex_get_ptr

examples/stdlib.c:1540–1544

}

static pid_t *mutex_get_ptr(const mutex_t *m)
{
    uintptr_t ptr = (uintptr_t)m->val + sizeof(int);
    return (pid_t *)(ptr & ~0x3ull);
}

/*
 * NOTE: mutex_lock() is marked with the __warn_unused_result__ attribute.