| /* |
| * SPDX-FileCopyrightText: 2015-2019 Cadence Design Systems, Inc. |
| * |
| * SPDX-License-Identifier: MIT |
| * |
| * SPDX-FileContributor: 2016-2022 Espressif Systems (Shanghai) CO LTD |
| */ |
| /* |
| * Copyright (c) 2015-2019 Cadence Design Systems, Inc. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining |
| * a copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sublicense, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included |
| * in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| |
| /* xtensa_overlay_os_hook.c -- Overlay manager OS hooks for FreeRTOS. */ |
| |
| #include "FreeRTOS.h" |
| #include "semphr.h" |
| |
| #if configUSE_MUTEX |
| |
| /* Mutex object that controls access to the overlay. Currently only one |
| * overlay region is supported so one mutex suffices. |
| */ |
| static SemaphoreHandle_t xt_overlay_mutex; |
| |
| |
| /* This function should be overridden to provide OS specific init such |
| * as the creation of a mutex lock that can be used for overlay locking. |
| * Typically this mutex would be set up with priority inheritance. See |
| * overlay manager documentation for more details. |
| */ |
| void xt_overlay_init_os( void ) |
| { |
| /* Create the mutex for overlay access. Priority inheritance is |
| * required. |
| */ |
| xt_overlay_mutex = xSemaphoreCreateMutex(); |
| } |
| |
| |
| /* This function locks access to shared overlay resources, typically |
| * by acquiring a mutex. |
| */ |
| void xt_overlay_lock( void ) |
| { |
| xSemaphoreTake( xt_overlay_mutex, 0 ); |
| } |
| |
| |
| /* This function releases access to shared overlay resources, typically |
| * by unlocking a mutex. |
| */ |
| void xt_overlay_unlock( void ) |
| { |
| xSemaphoreGive( xt_overlay_mutex ); |
| } |
| |
| #endif /* if configUSE_MUTEX */ |