xiao sun / SNICInterface

debug version

Dependents:   HTTPClient_WiFi_HelloWorld_src

Fork of SNICInterface by muRata

SNIC/CBuffer.h@12:0254eaccfda2, 2014-03-25 (annotated)

Committer:
kishino
Date:
Tue Mar 25 01:42:25 2014 +0000
Revision:
12:0254eaccfda2
Refactoring of the class name

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kishino 12:0254eaccfda2 1 /* Copyright (C) 2012 mbed.org, MIT License
kishino 12:0254eaccfda2 2 *
kishino 12:0254eaccfda2 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
kishino 12:0254eaccfda2 4 * and associated documentation files (the "Software"), to deal in the Software without restriction,
kishino 12:0254eaccfda2 5 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
kishino 12:0254eaccfda2 6 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
kishino 12:0254eaccfda2 7 * furnished to do so, subject to the following conditions:
kishino 12:0254eaccfda2 8 *
kishino 12:0254eaccfda2 9 * The above copyright notice and this permission notice shall be included in all copies or
kishino 12:0254eaccfda2 10 * substantial portions of the Software.
kishino 12:0254eaccfda2 11 *
kishino 12:0254eaccfda2 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
kishino 12:0254eaccfda2 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
kishino 12:0254eaccfda2 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
kishino 12:0254eaccfda2 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
kishino 12:0254eaccfda2 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
kishino 12:0254eaccfda2 17 */
kishino 12:0254eaccfda2 18
kishino 12:0254eaccfda2 19 #ifndef CIRCBUFFER_H_
kishino 12:0254eaccfda2 20 #define CIRCBUFFER_H_
kishino 12:0254eaccfda2 21
kishino 12:0254eaccfda2 22 template <class T>
kishino 12:0254eaccfda2 23 class CircBuffer {
kishino 12:0254eaccfda2 24 public:
kishino 12:0254eaccfda2 25 CircBuffer(int length) {
kishino 12:0254eaccfda2 26 write = 0;
kishino 12:0254eaccfda2 27 read = 0;
kishino 12:0254eaccfda2 28 size = length + 1;
kishino 12:0254eaccfda2 29 buf = (T *)malloc(size * sizeof(T));
kishino 12:0254eaccfda2 30 };
kishino 12:0254eaccfda2 31
kishino 12:0254eaccfda2 32 bool isFull() {
kishino 12:0254eaccfda2 33 return (((write + 1) % size) == read);
kishino 12:0254eaccfda2 34 };
kishino 12:0254eaccfda2 35
kishino 12:0254eaccfda2 36 bool isEmpty() {
kishino 12:0254eaccfda2 37 return (read == write);
kishino 12:0254eaccfda2 38 };
kishino 12:0254eaccfda2 39
kishino 12:0254eaccfda2 40 void queue(T k) {
kishino 12:0254eaccfda2 41
kishino 12:0254eaccfda2 42 if (isFull()) {
kishino 12:0254eaccfda2 43 read++;
kishino 12:0254eaccfda2 44 read %= size;
kishino 12:0254eaccfda2 45 }
kishino 12:0254eaccfda2 46 buf[write++] = k;
kishino 12:0254eaccfda2 47 write %= size;
kishino 12:0254eaccfda2 48 }
kishino 12:0254eaccfda2 49
kishino 12:0254eaccfda2 50 void flush() {
kishino 12:0254eaccfda2 51 read = 0;
kishino 12:0254eaccfda2 52 write = 0;
kishino 12:0254eaccfda2 53 }
kishino 12:0254eaccfda2 54
kishino 12:0254eaccfda2 55
kishino 12:0254eaccfda2 56 uint32_t available() {
kishino 12:0254eaccfda2 57 return (write >= read) ? write - read : size - read + write;
kishino 12:0254eaccfda2 58 };
kishino 12:0254eaccfda2 59
kishino 12:0254eaccfda2 60 bool dequeue(T * c) {
kishino 12:0254eaccfda2 61 bool empty = isEmpty();
kishino 12:0254eaccfda2 62 if (!empty) {
kishino 12:0254eaccfda2 63 *c = buf[read++];
kishino 12:0254eaccfda2 64 read %= size;
kishino 12:0254eaccfda2 65 }
kishino 12:0254eaccfda2 66 return(!empty);
kishino 12:0254eaccfda2 67 };
kishino 12:0254eaccfda2 68
kishino 12:0254eaccfda2 69 private:
kishino 12:0254eaccfda2 70 volatile uint32_t write;
kishino 12:0254eaccfda2 71 volatile uint32_t read;
kishino 12:0254eaccfda2 72 uint32_t size;
kishino 12:0254eaccfda2 73 T * buf;
kishino 12:0254eaccfda2 74 };
kishino 12:0254eaccfda2 75
kishino 12:0254eaccfda2 76 #endif