mirror of
https://github.com/FreeRTOS/FreeRTOS-Kernel.git
synced 2025-04-19 21:11:57 -04:00
77 lines
2.4 KiB
C
77 lines
2.4 KiB
C
/*
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* FreeRTOS Kernel <DEVELOPMENT BRANCH>
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* Copyright (C) 2015-2019 Cadence Design Systems, Inc.
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* Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* SPDX-License-Identifier: MIT
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* https://www.FreeRTOS.org
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* https://github.com/FreeRTOS
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*
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*/
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/*
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* xtensa_overlay_os_hook.c -- Overlay manager OS hooks for FreeRTOS.
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*/
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#include "FreeRTOS.h"
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#include "semphr.h"
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#if configUSE_MUTEX
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/* Mutex object that controls access to the overlay. Currently only one
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* overlay region is supported so one mutex suffices.
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*/
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static SemaphoreHandle_t xt_overlay_mutex;
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/* This function should be overridden to provide OS specific init such
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* as the creation of a mutex lock that can be used for overlay locking.
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* Typically this mutex would be set up with priority inheritance. See
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* overlay manager documentation for more details.
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*/
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void xt_overlay_init_os(void)
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{
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/* Create the mutex for overlay access. Priority inheritance is
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* required.
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*/
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xt_overlay_mutex = xSemaphoreCreateMutex();
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}
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/* This function locks access to shared overlay resources, typically
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* by acquiring a mutex.
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*/
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void xt_overlay_lock(void)
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{
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xSemaphoreTake(xt_overlay_mutex, 0);
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}
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/* This function releases access to shared overlay resources, typically
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* by unlocking a mutex.
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*/
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void xt_overlay_unlock(void)
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{
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xSemaphoreGive(xt_overlay_mutex);
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}
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#endif
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