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