【Linux 内核】线程调度示例一 ③ ( 获取线程优先级 | 设置线程调度策略 | 代码示例 )

int pthread_attr_setschedparam(pthread_attr_t *attr, const struct sched_param *param)

int pthread_attr_getschedparam(pthread_attr_t *attr, const struct sched_param *param)

/**
 * @brief 获取线程优先级
 * 
 * @return int 
 */
static int get_thread_priority(pthread_attr_t *p_attr){
	// 获取调度参数
	struct sched_param param;

    // 获取线程调度优先级
    int ret = pthread_attr_getschedparam(p_attr, &param);

    // 确保获取优先级操作执行成功，如果执行失败，则退出程序
    assert(ret == 0);

    printf("获取的线程优先级为 %d\n", param.sched_priority);

    return param.sched_priority;
}

int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy);

/**
 * @brief 设置线程调度策略
 * 
 * @return int 
 */
static int set_thread_policy(pthread_attr_t *p_attr, int policy){
    // 设置线程调度策略
    int ret = pthread_attr_setschedpolicy(p_attr, policy);

    // 确保获取优先级操作执行成功，如果执行失败，则退出程序
    assert(ret == 0);

    // 验证线程是否设置调度策略成功， 打印调度策略
    get_thread_policy(p_attr);

    return 0;
}