Suga koubou / Mbed 2 deprecated XTouch-djay-bridge

X-TOUCH to djay bridge

Dependencies:   mbed mbed-rtos FATFileSystem

CBuffer.h@1:0dac72ab5910, 2019-06-05 (annotated)

Committer:
okini3939
Date:
Wed Jun 05 04:54:37 2019 +0000
Revision:
1:0dac72ab5910
sample

Who changed what in which revision?

UserRevisionLine numberNew contents of line
okini3939 1:0dac72ab5910 1 /* Copyright (C) 2012 mbed.org, MIT License
okini3939 1:0dac72ab5910 2 *
okini3939 1:0dac72ab5910 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
okini3939 1:0dac72ab5910 4 * and associated documentation files (the "Software"), to deal in the Software without restriction,
okini3939 1:0dac72ab5910 5 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
okini3939 1:0dac72ab5910 6 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
okini3939 1:0dac72ab5910 7 * furnished to do so, subject to the following conditions:
okini3939 1:0dac72ab5910 8 *
okini3939 1:0dac72ab5910 9 * The above copyright notice and this permission notice shall be included in all copies or
okini3939 1:0dac72ab5910 10 * substantial portions of the Software.
okini3939 1:0dac72ab5910 11 *
okini3939 1:0dac72ab5910 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
okini3939 1:0dac72ab5910 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
okini3939 1:0dac72ab5910 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
okini3939 1:0dac72ab5910 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
okini3939 1:0dac72ab5910 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
okini3939 1:0dac72ab5910 17 */
okini3939 1:0dac72ab5910 18
okini3939 1:0dac72ab5910 19 #ifndef CIRCBUFFER_H_
okini3939 1:0dac72ab5910 20 #define CIRCBUFFER_H_
okini3939 1:0dac72ab5910 21
okini3939 1:0dac72ab5910 22 template <class T>
okini3939 1:0dac72ab5910 23 class CircBuffer {
okini3939 1:0dac72ab5910 24 public:
okini3939 1:0dac72ab5910 25 CircBuffer(int length) {
okini3939 1:0dac72ab5910 26 write = 0;
okini3939 1:0dac72ab5910 27 read = 0;
okini3939 1:0dac72ab5910 28 size = length + 1;
okini3939 1:0dac72ab5910 29 buf = new T[size * sizeof(T)];
okini3939 1:0dac72ab5910 30 // buf = (T *)malloc(size * sizeof(T));
okini3939 1:0dac72ab5910 31 if (buf == NULL)
okini3939 1:0dac72ab5910 32 error("Can't allocate memory");
okini3939 1:0dac72ab5910 33 };
okini3939 1:0dac72ab5910 34
okini3939 1:0dac72ab5910 35 bool isFull() {
okini3939 1:0dac72ab5910 36 return (((write + 1) % size) == read);
okini3939 1:0dac72ab5910 37 };
okini3939 1:0dac72ab5910 38
okini3939 1:0dac72ab5910 39 bool isEmpty() {
okini3939 1:0dac72ab5910 40 return (read == write);
okini3939 1:0dac72ab5910 41 };
okini3939 1:0dac72ab5910 42
okini3939 1:0dac72ab5910 43 void queue(T k) {
okini3939 1:0dac72ab5910 44 if (isFull()) {
okini3939 1:0dac72ab5910 45 // read++;
okini3939 1:0dac72ab5910 46 // read %= size;
okini3939 1:0dac72ab5910 47 return;
okini3939 1:0dac72ab5910 48 }
okini3939 1:0dac72ab5910 49 buf[write++] = k;
okini3939 1:0dac72ab5910 50 write %= size;
okini3939 1:0dac72ab5910 51 }
okini3939 1:0dac72ab5910 52
okini3939 1:0dac72ab5910 53 void flush() {
okini3939 1:0dac72ab5910 54 read = 0;
okini3939 1:0dac72ab5910 55 write = 0;
okini3939 1:0dac72ab5910 56 }
okini3939 1:0dac72ab5910 57
okini3939 1:0dac72ab5910 58
okini3939 1:0dac72ab5910 59 uint32_t available() {
okini3939 1:0dac72ab5910 60 return (write >= read) ? write - read : size - read + write;
okini3939 1:0dac72ab5910 61 };
okini3939 1:0dac72ab5910 62
okini3939 1:0dac72ab5910 63 bool dequeue(T * c) {
okini3939 1:0dac72ab5910 64 bool empty = isEmpty();
okini3939 1:0dac72ab5910 65 if (!empty) {
okini3939 1:0dac72ab5910 66 *c = buf[read++];
okini3939 1:0dac72ab5910 67 read %= size;
okini3939 1:0dac72ab5910 68 }
okini3939 1:0dac72ab5910 69 return(!empty);
okini3939 1:0dac72ab5910 70 };
okini3939 1:0dac72ab5910 71
okini3939 1:0dac72ab5910 72 private:
okini3939 1:0dac72ab5910 73 volatile uint32_t write;
okini3939 1:0dac72ab5910 74 volatile uint32_t read;
okini3939 1:0dac72ab5910 75 uint32_t size;
okini3939 1:0dac72ab5910 76 T * buf;
okini3939 1:0dac72ab5910 77 };
okini3939 1:0dac72ab5910 78
okini3939 1:0dac72ab5910 79 #endif