blob: eb59a2ea1a8cd7e62073c90a14bbf8b8b32d9ba9 [file] [log] [blame]
/*
* Copyright (c) 2018 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/kernel.h>
#include <zephyr/posix/sched.h>
static bool valid_posix_policy(int policy)
{
if (policy != SCHED_FIFO && policy != SCHED_RR) {
return false;
}
return true;
}
/**
* @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) == false) {
errno = EINVAL;
return -1;
}
if (IS_ENABLED(CONFIG_COOP_ENABLED)) {
if (policy == SCHED_FIFO) {
return 0;
}
}
if (IS_ENABLED(CONFIG_PREEMPT_ENABLED)) {
if (policy == SCHED_RR) {
return 0;
}
}
errno = EINVAL;
return -1;
}
/**
* @brief Get maximum priority value for a given policy
*
* See IEEE 1003.1
*/
int sched_get_priority_max(int policy)
{
if (valid_posix_policy(policy) == false) {
errno = EINVAL;
return -1;
}
if (IS_ENABLED(CONFIG_COOP_ENABLED)) {
if (policy == SCHED_FIFO) {
/* Posix COOP priority starts from 0
* whereas zephyr starts from -1
*/
return (CONFIG_NUM_COOP_PRIORITIES - 1);
}
}
if (IS_ENABLED(CONFIG_PREEMPT_ENABLED)) {
if (policy == SCHED_RR) {
return CONFIG_NUM_PREEMPT_PRIORITIES;
}
}
errno = EINVAL;
return -1;
}