Function pthread_once

components/libc/posix/pthreads/pthread.c:1038–1055

* @brief Executes a routine once in a multithreaded environment. * * The `pthread_once` function ensures that the specified initialization routine is executed exactly once, * even if multiple threads attempt to execute it simultaneously. It is typically used for one-time * initialization tasks in a multithreaded program. * * @param[in] once_control * A pointer to a `pthread_once_t` contro

 * @see pthread_mutex_lock, pthread_mutex_unlock
 */
int pthread_once(pthread_once_t *once_control, void (*init_routine)(void))
{
    RT_ASSERT(once_control != RT_NULL);
    RT_ASSERT(init_routine != RT_NULL);

    rt_enter_critical();
    if (!(*once_control))
    {
        /* call routine once */
        *once_control = 1;
        rt_exit_critical();

        init_routine();
    }
    rt_exit_critical();

    return 0;
}
RTM_EXPORT(pthread_once);

int pthread_atfork(void (*prepare)(void), void (*parent)(void), void (*child)(void))