WIFI library for WIFI Shield of Seeed Studio
Fork of WiflyInterface by
Diff: Wifly/CBuffer.h
- Revision:
- 5:26ae56c7cb3d
- Parent:
- 1:fb4494783863
diff -r fb4494783863 -r 26ae56c7cb3d Wifly/CBuffer.h --- a/Wifly/CBuffer.h Fri Aug 24 13:48:36 2012 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,75 +0,0 @@ -/* 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 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; - } - - void flush() { - read = 0; - write = 0; - } - - - uint32_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 uint32_t write; - volatile uint32_t read; - uint32_t size; - T * buf; -}; - -#endif