steve
Dependents: USBMouseKeyboard USBMouseKeyboardlib
Diff: USBSerial/CircBuffer.h
- Revision:
- 72:d2619b040139
- Parent:
- 8:335f2506f422
--- a/USBSerial/CircBuffer.h Fri Mar 01 13:10:29 2013 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,69 +0,0 @@ -/* Copyright (c) 2010-2011 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 CIRCBUFFER_H -#define CIRCBUFFER_H - -template <class T> -class CircBuffer { -public: - CircBuffer(int length) { - write = 0; - read = 0; - size = length + 1; - buf = (T *)malloc(size * sizeof(T)); - }; - - bool isFull() { - return ((write + 1) % size == read); - }; - - bool isEmpty() { - return (read == write); - }; - - void queue(T k) { - if (isFull()) { - read++; - read %= size; - } - buf[write++] = k; - write %= size; - } - - uint16_t available() { - return (write >= read) ? write - read : size - read + write; - }; - - bool dequeue(T * c) { - bool empty = isEmpty(); - if (!empty) { - *c = buf[read++]; - read %= size; - } - return(!empty); - }; - -private: - volatile uint16_t write; - volatile uint16_t read; - uint16_t size; - T * buf; -}; - -#endif