Function _lwp_setaffinity

components/lwp/lwp_pid.c:2242–2258

* @brief Set CPU affinity for a thread * * @param[in] tid The thread ID to set affinity for * @param[in] cpu The target CPU core number * * @return 0 on success, -1 on failure (invalid thread ID) * * @note This function binds a thread to a specific CPU core in SMP systems. * It handles thread reference counting and returns operation status. */

 *       It handles thread reference counting and returns operation status.
 */
static int _lwp_setaffinity(int tid, int cpu)
{
    rt_thread_t thread;
    int ret = -1;

    thread = lwp_tid_get_thread_and_inc_ref(tid);

    if (thread)
    {
#ifdef RT_USING_SMP
        rt_thread_control(thread, RT_THREAD_CTRL_BIND_CPU, (void *)(rt_ubase_t)cpu);
#endif
        ret = 0;
    }
    lwp_tid_dec_ref(thread);
    return ret;
}

/**
 * @brief Sets CPU affinity for a thread