Donatien Garnier / LwIPNetworking

Core networking libraries including LwIP implementation

Dependencies:   DebugLib Socket lwip lwip-sys

Dependents:   EthernetInterface

Fork of NetworkingCoreLib by Donatien Garnier

main/core/MtxCircBuffer.h@15:cf5f669a30bc, 2012-06-22 (annotated)

Committer:
donatien
Date:
Fri Jun 22 16:18:09 2012 +0000
Revision:
15:cf5f669a30bc
Parent:
13:f7d8c8088289 
DebugLib up

Who changed what in which revision?

UserRevisionLine numberNew contents of line
donatien 0:013f5d54248c 1 /* MtxCircBuf.h */
donatien 13:f7d8c8088289 2 /* Copyright (C) 2012 mbed.org, MIT License
donatien 13:f7d8c8088289 3 *
donatien 13:f7d8c8088289 4 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
donatien 13:f7d8c8088289 5 * and associated documentation files (the "Software"), to deal in the Software without restriction,
donatien 13:f7d8c8088289 6 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
donatien 13:f7d8c8088289 7 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
donatien 13:f7d8c8088289 8 * furnished to do so, subject to the following conditions:
donatien 13:f7d8c8088289 9 *
donatien 13:f7d8c8088289 10 * The above copyright notice and this permission notice shall be included in all copies or
donatien 13:f7d8c8088289 11 * substantial portions of the Software.
donatien 13:f7d8c8088289 12 *
donatien 13:f7d8c8088289 13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
donatien 13:f7d8c8088289 14 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
donatien 13:f7d8c8088289 15 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
donatien 13:f7d8c8088289 16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
donatien 13:f7d8c8088289 17 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
donatien 0:013f5d54248c 18 */
donatien 0:013f5d54248c 19
donatien 0:013f5d54248c 20 #ifndef MTXCIRCBUFFER_H
donatien 0:013f5d54248c 21 #define MTXCIRCBUFFER_H
donatien 0:013f5d54248c 22
donatien 0:013f5d54248c 23 #include "fwk.h"
donatien 0:013f5d54248c 24
donatien 0:013f5d54248c 25 #include "rtos.h"
donatien 0:013f5d54248c 26
donatien 0:013f5d54248c 27 //Mutex protected circualr buffer
donatien 0:013f5d54248c 28 template<typename T, int size>
donatien 0:013f5d54248c 29 class MtxCircBuffer
donatien 0:013f5d54248c 30 {
donatien 0:013f5d54248c 31 public:
donatien 0:013f5d54248c 32 MtxCircBuffer() //:
donatien 0:013f5d54248c 33 //mtx()
donatien 0:013f5d54248c 34 {
donatien 0:013f5d54248c 35 write = 0;
donatien 0:013f5d54248c 36 read = 0;
donatien 0:013f5d54248c 37 }
donatien 0:013f5d54248c 38
donatien 0:013f5d54248c 39 bool isFull()
donatien 0:013f5d54248c 40 {
donatien 0:013f5d54248c 41 mtx.lock();
donatien 0:013f5d54248c 42 bool r = (((write + 1) % size) == read);
donatien 0:013f5d54248c 43 mtx.unlock();
donatien 0:013f5d54248c 44 return r;
donatien 0:013f5d54248c 45 }
donatien 0:013f5d54248c 46
donatien 0:013f5d54248c 47 bool isEmpty()
donatien 0:013f5d54248c 48 {
donatien 0:013f5d54248c 49 mtx.lock();
donatien 0:013f5d54248c 50 bool r = (read == write);
donatien 0:013f5d54248c 51 mtx.unlock();
donatien 0:013f5d54248c 52 return r;
donatien 0:013f5d54248c 53 }
donatien 0:013f5d54248c 54
donatien 0:013f5d54248c 55 void queue(T k)
donatien 0:013f5d54248c 56 {
donatien 0:013f5d54248c 57 mtx.lock();
donatien 0:013f5d54248c 58 while (((write + 1) % size) == read) //if (isFull())
donatien 0:013f5d54248c 59 {
donatien 0:013f5d54248c 60 /*while((((write + 1) % size) == read))
donatien 0:013f5d54248c 61 {*/
donatien 0:013f5d54248c 62 mtx.unlock();
donatien 0:013f5d54248c 63 Thread::wait(10);
donatien 0:013f5d54248c 64 mtx.lock();
donatien 0:013f5d54248c 65 /*}*/
donatien 0:013f5d54248c 66 //read++;
donatien 0:013f5d54248c 67 //read %= size;
donatien 0:013f5d54248c 68 }
donatien 0:013f5d54248c 69 buf[write++] = k;
donatien 0:013f5d54248c 70 write %= size;
donatien 0:013f5d54248c 71 mtx.unlock();
donatien 0:013f5d54248c 72 }
donatien 0:013f5d54248c 73
donatien 0:013f5d54248c 74 uint16_t available()
donatien 0:013f5d54248c 75 {
donatien 0:013f5d54248c 76 mtx.lock();
donatien 0:013f5d54248c 77 uint16_t a = (write >= read) ? (write - read) : (size - read + write);
donatien 0:013f5d54248c 78 mtx.unlock();
donatien 0:013f5d54248c 79 return a;
donatien 0:013f5d54248c 80 }
donatien 0:013f5d54248c 81
donatien 0:013f5d54248c 82 bool dequeue(T * c)
donatien 0:013f5d54248c 83 {
donatien 0:013f5d54248c 84 mtx.lock();
donatien 0:013f5d54248c 85 bool empty = (read == write);
donatien 0:013f5d54248c 86 if (!empty)
donatien 0:013f5d54248c 87 {
donatien 0:013f5d54248c 88 *c = buf[read++];
donatien 0:013f5d54248c 89 read %= size;
donatien 0:013f5d54248c 90 }
donatien 0:013f5d54248c 91 mtx.unlock();
donatien 0:013f5d54248c 92 return (!empty);
donatien 0:013f5d54248c 93 }
donatien 0:013f5d54248c 94
donatien 0:013f5d54248c 95 private:
donatien 0:013f5d54248c 96 volatile uint16_t write;
donatien 0:013f5d54248c 97 volatile uint16_t read;
donatien 0:013f5d54248c 98 volatile T buf[size];
donatien 0:013f5d54248c 99 Mutex mtx;
donatien 0:013f5d54248c 100 };
donatien 0:013f5d54248c 101
donatien 0:013f5d54248c 102 #endif
donatien 0:013f5d54248c 103