Emiel Estiévenart / USBDevice

Base station firmware

USBSerial/CircBuffer.h@0:ecc3925d3f8c, 2016-05-24 (annotated)

Committer:
Perijah
Date:
Tue May 24 13:16:55 2016 +0000
Revision:
0:ecc3925d3f8c
Base station firmware

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Perijah 0:ecc3925d3f8c 1 /* Copyright (c) 2010-2011 mbed.org, MIT License
Perijah 0:ecc3925d3f8c 2 *
Perijah 0:ecc3925d3f8c 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
Perijah 0:ecc3925d3f8c 4 * and associated documentation files (the "Software"), to deal in the Software without
Perijah 0:ecc3925d3f8c 5 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
Perijah 0:ecc3925d3f8c 6 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
Perijah 0:ecc3925d3f8c 7 * Software is furnished to do so, subject to the following conditions:
Perijah 0:ecc3925d3f8c 8 *
Perijah 0:ecc3925d3f8c 9 * The above copyright notice and this permission notice shall be included in all copies or
Perijah 0:ecc3925d3f8c 10 * substantial portions of the Software.
Perijah 0:ecc3925d3f8c 11 *
Perijah 0:ecc3925d3f8c 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
Perijah 0:ecc3925d3f8c 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
Perijah 0:ecc3925d3f8c 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
Perijah 0:ecc3925d3f8c 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
Perijah 0:ecc3925d3f8c 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Perijah 0:ecc3925d3f8c 17 */
Perijah 0:ecc3925d3f8c 18
Perijah 0:ecc3925d3f8c 19 #ifndef CIRCBUFFER_H
Perijah 0:ecc3925d3f8c 20 #define CIRCBUFFER_H
Perijah 0:ecc3925d3f8c 21
Perijah 0:ecc3925d3f8c 22 template <class T>
Perijah 0:ecc3925d3f8c 23 class CircBuffer {
Perijah 0:ecc3925d3f8c 24 public:
Perijah 0:ecc3925d3f8c 25 CircBuffer(int length) {
Perijah 0:ecc3925d3f8c 26 write = 0;
Perijah 0:ecc3925d3f8c 27 read = 0;
Perijah 0:ecc3925d3f8c 28 size = length + 1;
Perijah 0:ecc3925d3f8c 29 buf = (T *)malloc(size * sizeof(T));
Perijah 0:ecc3925d3f8c 30 };
Perijah 0:ecc3925d3f8c 31
Perijah 0:ecc3925d3f8c 32 bool isFull() {
Perijah 0:ecc3925d3f8c 33 return ((write + 1) % size == read);
Perijah 0:ecc3925d3f8c 34 };
Perijah 0:ecc3925d3f8c 35
Perijah 0:ecc3925d3f8c 36 bool isEmpty() {
Perijah 0:ecc3925d3f8c 37 return (read == write);
Perijah 0:ecc3925d3f8c 38 };
Perijah 0:ecc3925d3f8c 39
Perijah 0:ecc3925d3f8c 40 void queue(T k) {
Perijah 0:ecc3925d3f8c 41 if (isFull()) {
Perijah 0:ecc3925d3f8c 42 read++;
Perijah 0:ecc3925d3f8c 43 read %= size;
Perijah 0:ecc3925d3f8c 44 }
Perijah 0:ecc3925d3f8c 45 buf[write++] = k;
Perijah 0:ecc3925d3f8c 46 write %= size;
Perijah 0:ecc3925d3f8c 47 }
Perijah 0:ecc3925d3f8c 48
Perijah 0:ecc3925d3f8c 49 uint16_t available() {
Perijah 0:ecc3925d3f8c 50 return (write >= read) ? write - read : size - read + write;
Perijah 0:ecc3925d3f8c 51 };
Perijah 0:ecc3925d3f8c 52
Perijah 0:ecc3925d3f8c 53 bool dequeue(T * c) {
Perijah 0:ecc3925d3f8c 54 bool empty = isEmpty();
Perijah 0:ecc3925d3f8c 55 if (!empty) {
Perijah 0:ecc3925d3f8c 56 *c = buf[read++];
Perijah 0:ecc3925d3f8c 57 read %= size;
Perijah 0:ecc3925d3f8c 58 }
Perijah 0:ecc3925d3f8c 59 return(!empty);
Perijah 0:ecc3925d3f8c 60 };
Perijah 0:ecc3925d3f8c 61
Perijah 0:ecc3925d3f8c 62 private:
Perijah 0:ecc3925d3f8c 63 volatile uint16_t write;
Perijah 0:ecc3925d3f8c 64 volatile uint16_t read;
Perijah 0:ecc3925d3f8c 65 uint16_t size;
Perijah 0:ecc3925d3f8c 66 T * buf;
Perijah 0:ecc3925d3f8c 67 };
Perijah 0:ecc3925d3f8c 68
Perijah 0:ecc3925d3f8c 69 #endif