X-TOUCH to djay bridge
Dependencies: mbed mbed-rtos FATFileSystem
CBuffer.h
00001 /* Copyright (C) 2012 mbed.org, MIT License 00002 * 00003 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software 00004 * and associated documentation files (the "Software"), to deal in the Software without restriction, 00005 * including without limitation the rights to use, copy, modify, merge, publish, distribute, 00006 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is 00007 * furnished to do so, subject to the following conditions: 00008 * 00009 * The above copyright notice and this permission notice shall be included in all copies or 00010 * substantial portions of the Software. 00011 * 00012 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING 00013 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 00014 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 00015 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 00016 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00017 */ 00018 00019 #ifndef CIRCBUFFER_H_ 00020 #define CIRCBUFFER_H_ 00021 00022 template <class T> 00023 class CircBuffer { 00024 public: 00025 CircBuffer(int length) { 00026 write = 0; 00027 read = 0; 00028 size = length + 1; 00029 buf = new T[size * sizeof(T)]; 00030 // buf = (T *)malloc(size * sizeof(T)); 00031 if (buf == NULL) 00032 error("Can't allocate memory"); 00033 }; 00034 00035 bool isFull() { 00036 return (((write + 1) % size) == read); 00037 }; 00038 00039 bool isEmpty() { 00040 return (read == write); 00041 }; 00042 00043 void queue(T k) { 00044 if (isFull()) { 00045 // read++; 00046 // read %= size; 00047 return; 00048 } 00049 buf[write++] = k; 00050 write %= size; 00051 } 00052 00053 void flush() { 00054 read = 0; 00055 write = 0; 00056 } 00057 00058 00059 uint32_t available() { 00060 return (write >= read) ? write - read : size - read + write; 00061 }; 00062 00063 bool dequeue(T * c) { 00064 bool empty = isEmpty(); 00065 if (!empty) { 00066 *c = buf[read++]; 00067 read %= size; 00068 } 00069 return(!empty); 00070 }; 00071 00072 private: 00073 volatile uint32_t write; 00074 volatile uint32_t read; 00075 uint32_t size; 00076 T * buf; 00077 }; 00078 00079 #endif
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