C++ (Cpp) kthread_set_prio示例

示例#1

文件： thread.c 项目： l30nard0/Benu

/*! Change thread scheduling parameters ------------------------------------- */
int kthread_setschedparam (kthread_t *kthread, int policy, sched_param_t *param)
{
	int sched_priority;

	ASSERT_ERRNO_AND_EXIT ( kthread, EINVAL );
	ASSERT_ERRNO_AND_EXIT ( kthread_is_alive (kthread), ESRCH );
	ASSERT_ERRNO_AND_EXIT ( policy >= 0 && policy < SCHED_NUM, EINVAL );

	if ( param )
	{
		ASSERT_ERRNO_AND_EXIT (
			param->sched_priority >= THREAD_MIN_PRIO &&
			param->sched_priority <= THREAD_MAX_PRIO, EINVAL );

		if ( param->sched_priority )
			sched_priority = param->sched_priority;
		else
			sched_priority = kthread->sched_priority;
	}
	else {
		sched_priority = kthread->sched_priority;
	}

	/* change in priority? */
	if ( kthread->sched_priority != sched_priority )
		kthread_set_prio ( kthread, sched_priority );

	return EXIT_SUCCESS;
}

示例#2

文件： thread.c 项目： bkolobara/Benu-pi

/*! Change thread scheduling parameters ------------------------------------- */
int kthread_setschedparam (kthread_t *kthread, int policy, sched_param_t *param)
{
	int sched_priority;
	sched_supp_t *supp;

	ASSERT_AND_RETURN_ERRNO ( kthread, EINVAL );
	ASSERT_AND_RETURN_ERRNO ( kthread_is_alive (kthread), ESRCH );
	ASSERT_AND_RETURN_ERRNO ( policy >= 0 && policy < SCHED_NUM, EINVAL );

	if ( param )
	{
		ASSERT_AND_RETURN_ERRNO (
			param->sched_priority >= THREAD_MIN_PRIO &&
			param->sched_priority <= THREAD_MAX_PRIO, EINVAL );

		if ( param->sched_priority )
			sched_priority = param->sched_priority;
		else
			sched_priority = kthread->sched_priority;

		supp = &param->supp;
	}
	else {
		sched_priority = kthread->sched_priority;
		supp = NULL;
	}

	/* change in priority? */
	if ( kthread->sched_priority != sched_priority )
		kthread_set_prio ( kthread, sched_priority );

	/* change in scheduling policy? */
	if ( kthread->sched_policy != policy )
	{
		ksched2_thread_remove ( kthread );
		ksched2_schedule ( kthread->sched_policy );
		kthread->sched_policy = policy;
		ksched2_thread_add ( kthread, policy, sched_priority, supp );
		ksched2_schedule ( kthread->sched_policy );
	}
	else if ( supp ) /* if policy changed, parameters are already given */
	{
		ksched2_setsched_param ( kthread, supp );
	}

	return EXIT_SUCCESS;
}