113 lines
2.7 KiB
C++
113 lines
2.7 KiB
C++
/*
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* The MIT License (MIT)
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*
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* ESP8266 FreeRTOS Firmware
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* Copyright (c) 2015 Michael Jacobsen (github.com/mikejac)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, 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
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* all 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,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* https://github.com/SuperHouse/esp-open-rtos
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*
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*/
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#ifndef ESP_OPEN_RTOS_MUTEX_HPP
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#define ESP_OPEN_RTOS_MUTEX_HPP
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#include "semphr.h"
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namespace esp_open_rtos {
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namespace thread {
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/******************************************************************************************************************
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* class mutex_t
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*
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*/
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class mutex_t
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{
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public:
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/**
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*
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*/
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inline mutex_t()
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{
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mutex = 0;
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}
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/**
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*
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* @return
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*/
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inline int mutex_create()
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{
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mutex = xSemaphoreCreateMutex();
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if(mutex == NULL) {
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return -1;
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}
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else {
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return 0;
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}
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}
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/**
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*
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*/
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inline void mutex_destroy()
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{
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vQueueDelete(mutex);
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mutex = 0;
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}
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/**
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*
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* @return
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*/
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inline int lock()
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{
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return (xSemaphoreTake(mutex, portMAX_DELAY) == pdTRUE) ? 0 : -1;
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}
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/**
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*
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* @param ms
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* @return
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*/
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inline int try_lock(unsigned long ms)
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{
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return (xSemaphoreTake(mutex, ms / portTICK_PERIOD_MS) == pdTRUE) ? 0 : -1;
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}
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/**
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*
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* @return
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*/
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inline int unlock()
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{
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return (xSemaphoreGive(mutex) == pdTRUE) ? 0 : -1;
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}
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private:
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SemaphoreHandle_t mutex;
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// Disable copy construction and assignment.
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mutex_t (const mutex_t&);
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const mutex_t &operator = (const mutex_t&);
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};
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} //namespace thread {
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} //namespace esp_open_rtos {
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#endif /* ESP_OPEN_RTOS_MUTEX_HPP */
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