KDDI Fx0 hackathon / SNICInterface_Tweet

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SNIC/CBuffer.h@0:edaa24c1f5cd, 2015-02-10 (annotated)

Committer:
komoritan
Date:
Tue Feb 10 12:26:31 2015 +0000
Revision:
0:edaa24c1f5cd
Debug Code

Who changed what in which revision?

UserRevisionLine numberNew contents of line
komoritan 0:edaa24c1f5cd 1 /* Copyright (C) 2012 mbed.org, MIT License
komoritan 0:edaa24c1f5cd 2 *
komoritan 0:edaa24c1f5cd 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
komoritan 0:edaa24c1f5cd 4 * and associated documentation files (the "Software"), to deal in the Software without restriction,
komoritan 0:edaa24c1f5cd 5 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
komoritan 0:edaa24c1f5cd 6 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
komoritan 0:edaa24c1f5cd 7 * furnished to do so, subject to the following conditions:
komoritan 0:edaa24c1f5cd 8 *
komoritan 0:edaa24c1f5cd 9 * The above copyright notice and this permission notice shall be included in all copies or
komoritan 0:edaa24c1f5cd 10 * substantial portions of the Software.
komoritan 0:edaa24c1f5cd 11 *
komoritan 0:edaa24c1f5cd 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
komoritan 0:edaa24c1f5cd 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
komoritan 0:edaa24c1f5cd 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
komoritan 0:edaa24c1f5cd 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
komoritan 0:edaa24c1f5cd 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
komoritan 0:edaa24c1f5cd 17 */
komoritan 0:edaa24c1f5cd 18
komoritan 0:edaa24c1f5cd 19 #ifndef CIRCBUFFER_H_
komoritan 0:edaa24c1f5cd 20 #define CIRCBUFFER_H_
komoritan 0:edaa24c1f5cd 21
komoritan 0:edaa24c1f5cd 22 template <class T>
komoritan 0:edaa24c1f5cd 23 class CircBuffer {
komoritan 0:edaa24c1f5cd 24 public:
komoritan 0:edaa24c1f5cd 25 CircBuffer(int length) {
komoritan 0:edaa24c1f5cd 26 write = 0;
komoritan 0:edaa24c1f5cd 27 read = 0;
komoritan 0:edaa24c1f5cd 28 size = length + 1;
komoritan 0:edaa24c1f5cd 29 buf = (T *)malloc(size * sizeof(T));
komoritan 0:edaa24c1f5cd 30 };
komoritan 0:edaa24c1f5cd 31
komoritan 0:edaa24c1f5cd 32 bool isFull() {
komoritan 0:edaa24c1f5cd 33 return (((write + 1) % size) == read);
komoritan 0:edaa24c1f5cd 34 };
komoritan 0:edaa24c1f5cd 35
komoritan 0:edaa24c1f5cd 36 bool isEmpty() {
komoritan 0:edaa24c1f5cd 37 return (read == write);
komoritan 0:edaa24c1f5cd 38 };
komoritan 0:edaa24c1f5cd 39
komoritan 0:edaa24c1f5cd 40 void queue(T k) {
komoritan 0:edaa24c1f5cd 41
komoritan 0:edaa24c1f5cd 42 if (isFull()) {
komoritan 0:edaa24c1f5cd 43 read++;
komoritan 0:edaa24c1f5cd 44 read %= size;
komoritan 0:edaa24c1f5cd 45 }
komoritan 0:edaa24c1f5cd 46 buf[write++] = k;
komoritan 0:edaa24c1f5cd 47 write %= size;
komoritan 0:edaa24c1f5cd 48 }
komoritan 0:edaa24c1f5cd 49
komoritan 0:edaa24c1f5cd 50 void flush() {
komoritan 0:edaa24c1f5cd 51 read = 0;
komoritan 0:edaa24c1f5cd 52 write = 0;
komoritan 0:edaa24c1f5cd 53 }
komoritan 0:edaa24c1f5cd 54
komoritan 0:edaa24c1f5cd 55
komoritan 0:edaa24c1f5cd 56 uint32_t available() {
komoritan 0:edaa24c1f5cd 57 return (write >= read) ? write - read : size - read + write;
komoritan 0:edaa24c1f5cd 58 };
komoritan 0:edaa24c1f5cd 59
komoritan 0:edaa24c1f5cd 60 bool dequeue(T * c) {
komoritan 0:edaa24c1f5cd 61 bool empty = isEmpty();
komoritan 0:edaa24c1f5cd 62 if (!empty) {
komoritan 0:edaa24c1f5cd 63 *c = buf[read++];
komoritan 0:edaa24c1f5cd 64 read %= size;
komoritan 0:edaa24c1f5cd 65 }
komoritan 0:edaa24c1f5cd 66 return(!empty);
komoritan 0:edaa24c1f5cd 67 };
komoritan 0:edaa24c1f5cd 68
komoritan 0:edaa24c1f5cd 69 private:
komoritan 0:edaa24c1f5cd 70 volatile uint32_t write;
komoritan 0:edaa24c1f5cd 71 volatile uint32_t read;
komoritan 0:edaa24c1f5cd 72 uint32_t size;
komoritan 0:edaa24c1f5cd 73 T * buf;
komoritan 0:edaa24c1f5cd 74 };
komoritan 0:edaa24c1f5cd 75
komoritan 0:edaa24c1f5cd 76 #endif