Function rt_cpus_lock

src/cpu_mp.c:168–196

* @brief This function will lock all cpus's scheduler and disable local irq. * * @return Return current cpu interrupt status. * * @note This function only has MP version. */

 * @note    This function only has MP version.
 */
rt_base_t rt_cpus_lock(void)
{
    rt_base_t level;
    struct rt_cpu* pcpu;

    level = rt_hw_local_irq_disable();
    pcpu = rt_cpu_self();
    if (pcpu->current_thread != RT_NULL)
    {
        rt_ubase_t lock_nest = rt_atomic_load(&(pcpu->current_thread->cpus_lock_nest));

        rt_atomic_add(&(pcpu->current_thread->cpus_lock_nest), 1);
        if (lock_nest == 0)
        {
            rt_enter_critical();
            rt_hw_spin_lock(&_cpus_lock);
#ifdef RT_USING_DEBUG
            _cpus_critical_level = rt_critical_level();
#endif /* RT_USING_DEBUG */

#ifdef RT_DEBUGING_SPINLOCK
            _cpus_lock_owner = pcpu->current_thread;
            _cpus_lock_pc = __GET_RETURN_ADDRESS;
#endif /* RT_DEBUGING_SPINLOCK */
        }
    }

    return level;
}
RTM_EXPORT(rt_cpus_lock);

/**