90 lines
2 KiB
C++
90 lines
2 KiB
C++
/*
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* ESP8266 FreeRTOS Firmware
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* Copyright (C) 2015 Michael Jacobsen
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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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 = xSemaphoreCreateMutex();
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}
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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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vQueueDelete(mutex);
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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_RATE_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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xSemaphoreHandle 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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