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mutex os

Grumpy Guanaco answered on September 28, 2022 Popularity 8/10 Helpfulness 1/10

answer mutex os

mutex os

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pthread_cond_wait(mutex, cond):
    value = cond->value; /* 1 */
    pthread_mutex_unlock(mutex); /* 2 */
    pthread_mutex_lock(cond->mutex); /* 10 */
    if (value == cond->value) { /* 11 */
        me->next_cond = cond->waiter;
        cond->waiter = me;
        pthread_mutex_unlock(cond->mutex);
        unable_to_run(me);
    } else
        pthread_mutex_unlock(cond->mutex); /* 12 */
    pthread_mutex_lock(mutex); /* 13 */

pthread_cond_signal(cond):
    pthread_mutex_lock(cond->mutex); /* 3 */
    cond->value++; /* 4 */
    if (cond->waiter) { /* 5 */
        sleeper = cond->waiter; /* 6 */
        cond->waiter = sleeper->next_cond; /* 7 */
        able_to_run(sleeper); /* 8 */
    }
    pthread_mutex_unlock(cond->mutex); /* 9 */

Popularity 8/10 Helpfulness 1/10 Language whatever

Source: linux.die.net

Tags: mutex whatever

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Contributed on Sep 28 2022

Grumpy Guanaco

0 Answers Avg Quality 2/10

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