fernan robin / Projet-matthieu

wifly/socket interface for wifly modules

Dependents:   PROJET_MATTHIEU_2019 PROJET_MATTHIEU_2019

Wifly/CBuffer.h@0:6ffb0aeb3972, 2012-08-17 (annotated)

Committer:
samux
Date:
Fri Aug 17 08:28:04 2012 +0000
Revision:
0:6ffb0aeb3972
first commit

Who changed what in which revision?

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samux 0:6ffb0aeb3972 1 /* Copyright (C) 2012 mbed.org, MIT License
samux 0:6ffb0aeb3972 2 *
samux 0:6ffb0aeb3972 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
samux 0:6ffb0aeb3972 4 * and associated documentation files (the "Software"), to deal in the Software without restriction,
samux 0:6ffb0aeb3972 5 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
samux 0:6ffb0aeb3972 6 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
samux 0:6ffb0aeb3972 7 * furnished to do so, subject to the following conditions:
samux 0:6ffb0aeb3972 8 *
samux 0:6ffb0aeb3972 9 * The above copyright notice and this permission notice shall be included in all copies or
samux 0:6ffb0aeb3972 10 * substantial portions of the Software.
samux 0:6ffb0aeb3972 11 *
samux 0:6ffb0aeb3972 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
samux 0:6ffb0aeb3972 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
samux 0:6ffb0aeb3972 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
samux 0:6ffb0aeb3972 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
samux 0:6ffb0aeb3972 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
samux 0:6ffb0aeb3972 17 */
samux 0:6ffb0aeb3972 18
samux 0:6ffb0aeb3972 19 #ifndef CIRCBUFFER_H_
samux 0:6ffb0aeb3972 20 #define CIRCBUFFER_H_
samux 0:6ffb0aeb3972 21
samux 0:6ffb0aeb3972 22 template <class T>
samux 0:6ffb0aeb3972 23 class CircBuffer {
samux 0:6ffb0aeb3972 24 public:
samux 0:6ffb0aeb3972 25 CircBuffer(int length) {
samux 0:6ffb0aeb3972 26 write = 0;
samux 0:6ffb0aeb3972 27 read = 0;
samux 0:6ffb0aeb3972 28 size = length + 1;
samux 0:6ffb0aeb3972 29 buf = (T *)malloc(size * sizeof(T));
samux 0:6ffb0aeb3972 30 };
samux 0:6ffb0aeb3972 31
samux 0:6ffb0aeb3972 32 bool isFull() {
samux 0:6ffb0aeb3972 33 return (((write + 1) % size) == read);
samux 0:6ffb0aeb3972 34 };
samux 0:6ffb0aeb3972 35
samux 0:6ffb0aeb3972 36 bool isEmpty() {
samux 0:6ffb0aeb3972 37 return (read == write);
samux 0:6ffb0aeb3972 38 };
samux 0:6ffb0aeb3972 39
samux 0:6ffb0aeb3972 40 void queue(T k) {
samux 0:6ffb0aeb3972 41 if (isFull()) {
samux 0:6ffb0aeb3972 42 read++;
samux 0:6ffb0aeb3972 43 read %= size;
samux 0:6ffb0aeb3972 44 }
samux 0:6ffb0aeb3972 45 buf[write++] = k;
samux 0:6ffb0aeb3972 46 write %= size;
samux 0:6ffb0aeb3972 47 }
samux 0:6ffb0aeb3972 48
samux 0:6ffb0aeb3972 49 void flush() {
samux 0:6ffb0aeb3972 50 read = 0;
samux 0:6ffb0aeb3972 51 write = 0;
samux 0:6ffb0aeb3972 52 }
samux 0:6ffb0aeb3972 53
samux 0:6ffb0aeb3972 54
samux 0:6ffb0aeb3972 55 uint32_t available() {
samux 0:6ffb0aeb3972 56 return (write >= read) ? write - read : size - read + write;
samux 0:6ffb0aeb3972 57 };
samux 0:6ffb0aeb3972 58
samux 0:6ffb0aeb3972 59 bool dequeue(T * c) {
samux 0:6ffb0aeb3972 60 bool empty = isEmpty();
samux 0:6ffb0aeb3972 61 if (!empty) {
samux 0:6ffb0aeb3972 62 *c = buf[read++];
samux 0:6ffb0aeb3972 63 read %= size;
samux 0:6ffb0aeb3972 64 }
samux 0:6ffb0aeb3972 65 return(!empty);
samux 0:6ffb0aeb3972 66 };
samux 0:6ffb0aeb3972 67
samux 0:6ffb0aeb3972 68 private:
samux 0:6ffb0aeb3972 69 volatile uint32_t write;
samux 0:6ffb0aeb3972 70 volatile uint32_t read;
samux 0:6ffb0aeb3972 71 uint32_t size;
samux 0:6ffb0aeb3972 72 T * buf;
samux 0:6ffb0aeb3972 73 };
samux 0:6ffb0aeb3972 74
samux 0:6ffb0aeb3972 75 #endif