zephyr/lib/posix/options/sched.c

/*
 * Copyright (c) 2018-2023 Intel Corporation
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include "pthread_sched.h"

#include <zephyr/kernel.h>
#include <zephyr/posix/sched.h>

/**
 * @brief Get minimum priority value for a given policy
 *
 * See IEEE 1003.1
 */
int sched_get_priority_min(int policy)
{
	if (!valid_posix_policy(policy)) {
		errno = EINVAL;
		return -1;
	}

	return 0;
}

/**
 * @brief Get maximum priority value for a given policy
 *
 * See IEEE 1003.1
 */
int sched_get_priority_max(int policy)
{
	if (IS_ENABLED(CONFIG_COOP_ENABLED) && policy == SCHED_FIFO) {
		return CONFIG_NUM_COOP_PRIORITIES - 1;
	} else if (IS_ENABLED(CONFIG_PREEMPT_ENABLED) &&
		   (policy == SCHED_RR || policy == SCHED_OTHER)) {
		return CONFIG_NUM_PREEMPT_PRIORITIES - 1;
	}

	errno = EINVAL;
	return -1;
}

/**
 * @brief Get scheduling parameters
 *
 * See IEEE 1003.1
 */
int sched_getparam(pid_t pid, struct sched_param *param)
{
	ARG_UNUSED(pid);
	ARG_UNUSED(param);

	errno = ENOSYS;

	return -1;
}

/**
 * @brief Get scheduling policy
 *
 * See IEEE 1003.1
 */
int sched_getscheduler(pid_t pid)
{
	ARG_UNUSED(pid);

	errno = ENOSYS;

	return -1;
}

/**
 * @brief Set scheduling parameters
 *
 * See IEEE 1003.1
 */
int sched_setparam(pid_t pid, const struct sched_param *param)
{
	ARG_UNUSED(pid);
	ARG_UNUSED(param);

	errno = ENOSYS;

	return -1;
}

/**
 * @brief Set scheduling policy
 *
 * See IEEE 1003.1
 */
int sched_setscheduler(pid_t pid, int policy, const struct sched_param *param)
{
	ARG_UNUSED(pid);
	ARG_UNUSED(policy);
	ARG_UNUSED(param);

	errno = ENOSYS;

	return -1;
}