Donatien Garnier / VodafoneUSBModem

Vodafone K3770/K3772-Z modems driver & networking library

Dependencies:   Socket

This library is deprecated. Please use the newest production branch of the library from https://mbed.org/users/mbed_official/code/VodafoneUSBModem/

core/MtxCircBuffer.h@0:bd5343539e38, 2012-08-17 (annotated)

Committer:
donatien
Date:
Fri Aug 17 15:21:55 2012 +0000
Revision:
0:bd5343539e38
Initial public commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
donatien 0:bd5343539e38 1 /* MtxCircBuf.h */
donatien 0:bd5343539e38 2 /* Copyright (C) 2012 mbed.org, MIT License
donatien 0:bd5343539e38 3 *
donatien 0:bd5343539e38 4 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
donatien 0:bd5343539e38 5 * and associated documentation files (the "Software"), to deal in the Software without restriction,
donatien 0:bd5343539e38 6 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
donatien 0:bd5343539e38 7 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
donatien 0:bd5343539e38 8 * furnished to do so, subject to the following conditions:
donatien 0:bd5343539e38 9 *
donatien 0:bd5343539e38 10 * The above copyright notice and this permission notice shall be included in all copies or
donatien 0:bd5343539e38 11 * substantial portions of the Software.
donatien 0:bd5343539e38 12 *
donatien 0:bd5343539e38 13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
donatien 0:bd5343539e38 14 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
donatien 0:bd5343539e38 15 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
donatien 0:bd5343539e38 16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
donatien 0:bd5343539e38 17 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
donatien 0:bd5343539e38 18 */
donatien 0:bd5343539e38 19
donatien 0:bd5343539e38 20 #ifndef MTXCIRCBUFFER_H
donatien 0:bd5343539e38 21 #define MTXCIRCBUFFER_H
donatien 0:bd5343539e38 22
donatien 0:bd5343539e38 23 #include "fwk.h"
donatien 0:bd5343539e38 24
donatien 0:bd5343539e38 25 #include "rtos.h"
donatien 0:bd5343539e38 26
donatien 0:bd5343539e38 27 //Mutex protected circualr buffer
donatien 0:bd5343539e38 28 template<typename T, int size>
donatien 0:bd5343539e38 29 class MtxCircBuffer
donatien 0:bd5343539e38 30 {
donatien 0:bd5343539e38 31 public:
donatien 0:bd5343539e38 32 MtxCircBuffer() //:
donatien 0:bd5343539e38 33 //mtx()
donatien 0:bd5343539e38 34 {
donatien 0:bd5343539e38 35 write = 0;
donatien 0:bd5343539e38 36 read = 0;
donatien 0:bd5343539e38 37 }
donatien 0:bd5343539e38 38
donatien 0:bd5343539e38 39 bool isFull()
donatien 0:bd5343539e38 40 {
donatien 0:bd5343539e38 41 mtx.lock();
donatien 0:bd5343539e38 42 bool r = (((write + 1) % size) == read);
donatien 0:bd5343539e38 43 mtx.unlock();
donatien 0:bd5343539e38 44 return r;
donatien 0:bd5343539e38 45 }
donatien 0:bd5343539e38 46
donatien 0:bd5343539e38 47 bool isEmpty()
donatien 0:bd5343539e38 48 {
donatien 0:bd5343539e38 49 mtx.lock();
donatien 0:bd5343539e38 50 bool r = (read == write);
donatien 0:bd5343539e38 51 mtx.unlock();
donatien 0:bd5343539e38 52 return r;
donatien 0:bd5343539e38 53 }
donatien 0:bd5343539e38 54
donatien 0:bd5343539e38 55 void queue(T k)
donatien 0:bd5343539e38 56 {
donatien 0:bd5343539e38 57 mtx.lock();
donatien 0:bd5343539e38 58 while (((write + 1) % size) == read) //if (isFull())
donatien 0:bd5343539e38 59 {
donatien 0:bd5343539e38 60 /*while((((write + 1) % size) == read))
donatien 0:bd5343539e38 61 {*/
donatien 0:bd5343539e38 62 mtx.unlock();
donatien 0:bd5343539e38 63 Thread::wait(10);
donatien 0:bd5343539e38 64 mtx.lock();
donatien 0:bd5343539e38 65 /*}*/
donatien 0:bd5343539e38 66 //read++;
donatien 0:bd5343539e38 67 //read %= size;
donatien 0:bd5343539e38 68 }
donatien 0:bd5343539e38 69 buf[write++] = k;
donatien 0:bd5343539e38 70 write %= size;
donatien 0:bd5343539e38 71 mtx.unlock();
donatien 0:bd5343539e38 72 }
donatien 0:bd5343539e38 73
donatien 0:bd5343539e38 74 uint16_t available()
donatien 0:bd5343539e38 75 {
donatien 0:bd5343539e38 76 mtx.lock();
donatien 0:bd5343539e38 77 uint16_t a = (write >= read) ? (write - read) : (size - read + write);
donatien 0:bd5343539e38 78 mtx.unlock();
donatien 0:bd5343539e38 79 return a;
donatien 0:bd5343539e38 80 }
donatien 0:bd5343539e38 81
donatien 0:bd5343539e38 82 bool dequeue(T * c)
donatien 0:bd5343539e38 83 {
donatien 0:bd5343539e38 84 mtx.lock();
donatien 0:bd5343539e38 85 bool empty = (read == write);
donatien 0:bd5343539e38 86 if (!empty)
donatien 0:bd5343539e38 87 {
donatien 0:bd5343539e38 88 *c = buf[read++];
donatien 0:bd5343539e38 89 read %= size;
donatien 0:bd5343539e38 90 }
donatien 0:bd5343539e38 91 mtx.unlock();
donatien 0:bd5343539e38 92 return (!empty);
donatien 0:bd5343539e38 93 }
donatien 0:bd5343539e38 94
donatien 0:bd5343539e38 95 private:
donatien 0:bd5343539e38 96 volatile uint16_t write;
donatien 0:bd5343539e38 97 volatile uint16_t read;
donatien 0:bd5343539e38 98 volatile T buf[size];
donatien 0:bd5343539e38 99 Mutex mtx;
donatien 0:bd5343539e38 100 };
donatien 0:bd5343539e38 101
donatien 0:bd5343539e38 102 #endif
donatien 0:bd5343539e38 103