+++ /dev/null
-/* MtxCircBuf.h */
-/* Copyright (C) 2012 mbed.org, MIT License
- *
- * 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.
- */
-
-#ifndef MTXCIRCBUFFER_H
-#define MTXCIRCBUFFER_H
-
-#include "rtos.h"
-
-//Mutex protected circualr buffer
-template<typename T, int size>
-class MtxCircBuffer
-{
-public:
- MtxCircBuffer() //:
- //mtx()
- {
- write = 0;
- read = 0;
- }
-
- bool isFull()
- {
- mtx.lock();
- bool r = (((write + 1) % size) == read);
- mtx.unlock();
- return r;
- }
-
- bool isEmpty()
- {
- mtx.lock();
- bool r = (read == write);
- mtx.unlock();
- return r;
- }
-
- void queue(T k)
- {
- mtx.lock();
- buf[write++] = k;
- write %= size;
- if (isFull())
- {
- read++;
- read %= size;
- }
- mtx.unlock();
- }
-
- uint16_t available()
- {
- mtx.lock();
- uint16_t a = (write >= read) ? (write - read) : (size - read + write);
- mtx.unlock();
- return a;
- }
-
- bool dequeue(T * c)
- {
- mtx.lock();
- bool empty = (read == write);
- if (!empty)
- {
- *c = buf[read++];
- read %= size;
- }
- mtx.unlock();
- return (!empty);
- }
-
-private:
- volatile uint16_t write;
- volatile uint16_t read;
- volatile T buf[size];
- Mutex mtx;
-};
-
-#endif
-