Function pthread_cond_broadcast

components/libc/posix/pthreads/pthread_cond.c:218–249

* @brief Unblocks all threads waiting on the specified condition variable. * * This function wakes up all threads that are currently blocked on the condition variable * pointed to by `cond`. The condition variable must be associated with a mutex, and * threads waiting on the condition variable should recheck the condition after being * unblocked. * * @param cond A pointer to the condition v

 * @see pthread_cond_signal, pthread_cond_wait, pthread_cond_init, pthread_cond_destroy
 */
int pthread_cond_broadcast(pthread_cond_t *cond)
{
    rt_err_t result;

    if (cond == RT_NULL)
        return EINVAL;
    if (cond->attr == -1)
        pthread_cond_init(cond, RT_NULL);

    while (1)
    {
        /* try to take condition semaphore */
        result = rt_sem_trytake(&(cond->sem));
        if (result == -RT_ETIMEOUT)
        {
            /* it's timeout, release this semaphore */
            rt_sem_release(&(cond->sem));
        }
        else if (result == RT_EOK)
        {
            /* has taken this semaphore, release it */
            rt_sem_release(&(cond->sem));
            break;
        }
        else
        {
            return EINVAL;
        }
    }

    return 0;
}
RTM_EXPORT(pthread_cond_broadcast);

/**