Donatien Garnier / LwIPNetworking

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Dependencies:   DebugLib Socket lwip lwip-sys

Dependents:   EthernetInterface

Fork of NetworkingCoreLib by Donatien Garnier

main/core/MtxCircBuffer.h@0:013f5d54248c, 2012-05-24 (annotated)

Committer:
donatien
Date:
Thu May 24 14:49:40 2012 +0000
Revision:
0:013f5d54248c
Child:
13:f7d8c8088289
Initial Commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
donatien 0:013f5d54248c 1 /* MtxCircBuf.h */
donatien 0:013f5d54248c 2 /*
donatien 0:013f5d54248c 3 Copyright (C) 2012 ARM Limited.
donatien 0:013f5d54248c 4
donatien 0:013f5d54248c 5 Permission is hereby granted, free of charge, to any person obtaining a copy of
donatien 0:013f5d54248c 6 this software and associated documentation files (the "Software"), to deal in
donatien 0:013f5d54248c 7 the Software without restriction, including without limitation the rights to
donatien 0:013f5d54248c 8 use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
donatien 0:013f5d54248c 9 of the Software, and to permit persons to whom the Software is furnished to do
donatien 0:013f5d54248c 10 so, subject to the following conditions:
donatien 0:013f5d54248c 11
donatien 0:013f5d54248c 12 The above copyright notice and this permission notice shall be included in all
donatien 0:013f5d54248c 13 copies or substantial portions of the Software.
donatien 0:013f5d54248c 14
donatien 0:013f5d54248c 15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
donatien 0:013f5d54248c 16 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
donatien 0:013f5d54248c 17 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
donatien 0:013f5d54248c 18 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
donatien 0:013f5d54248c 19 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
donatien 0:013f5d54248c 20 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
donatien 0:013f5d54248c 21 SOFTWARE.
donatien 0:013f5d54248c 22 */
donatien 0:013f5d54248c 23
donatien 0:013f5d54248c 24 #ifndef MTXCIRCBUFFER_H
donatien 0:013f5d54248c 25 #define MTXCIRCBUFFER_H
donatien 0:013f5d54248c 26
donatien 0:013f5d54248c 27 #include "fwk.h"
donatien 0:013f5d54248c 28
donatien 0:013f5d54248c 29 #include "rtos.h"
donatien 0:013f5d54248c 30
donatien 0:013f5d54248c 31 //Mutex protected circualr buffer
donatien 0:013f5d54248c 32 template<typename T, int size>
donatien 0:013f5d54248c 33 class MtxCircBuffer
donatien 0:013f5d54248c 34 {
donatien 0:013f5d54248c 35 public:
donatien 0:013f5d54248c 36 MtxCircBuffer() //:
donatien 0:013f5d54248c 37 //mtx()
donatien 0:013f5d54248c 38 {
donatien 0:013f5d54248c 39 write = 0;
donatien 0:013f5d54248c 40 read = 0;
donatien 0:013f5d54248c 41 }
donatien 0:013f5d54248c 42
donatien 0:013f5d54248c 43 bool isFull()
donatien 0:013f5d54248c 44 {
donatien 0:013f5d54248c 45 mtx.lock();
donatien 0:013f5d54248c 46 bool r = (((write + 1) % size) == read);
donatien 0:013f5d54248c 47 mtx.unlock();
donatien 0:013f5d54248c 48 return r;
donatien 0:013f5d54248c 49 }
donatien 0:013f5d54248c 50
donatien 0:013f5d54248c 51 bool isEmpty()
donatien 0:013f5d54248c 52 {
donatien 0:013f5d54248c 53 mtx.lock();
donatien 0:013f5d54248c 54 bool r = (read == write);
donatien 0:013f5d54248c 55 mtx.unlock();
donatien 0:013f5d54248c 56 return r;
donatien 0:013f5d54248c 57 }
donatien 0:013f5d54248c 58
donatien 0:013f5d54248c 59 void queue(T k)
donatien 0:013f5d54248c 60 {
donatien 0:013f5d54248c 61 mtx.lock();
donatien 0:013f5d54248c 62 while (((write + 1) % size) == read) //if (isFull())
donatien 0:013f5d54248c 63 {
donatien 0:013f5d54248c 64 /*while((((write + 1) % size) == read))
donatien 0:013f5d54248c 65 {*/
donatien 0:013f5d54248c 66 mtx.unlock();
donatien 0:013f5d54248c 67 Thread::wait(10);
donatien 0:013f5d54248c 68 mtx.lock();
donatien 0:013f5d54248c 69 /*}*/
donatien 0:013f5d54248c 70 //read++;
donatien 0:013f5d54248c 71 //read %= size;
donatien 0:013f5d54248c 72 }
donatien 0:013f5d54248c 73 buf[write++] = k;
donatien 0:013f5d54248c 74 write %= size;
donatien 0:013f5d54248c 75 mtx.unlock();
donatien 0:013f5d54248c 76 }
donatien 0:013f5d54248c 77
donatien 0:013f5d54248c 78 uint16_t available()
donatien 0:013f5d54248c 79 {
donatien 0:013f5d54248c 80 mtx.lock();
donatien 0:013f5d54248c 81 uint16_t a = (write >= read) ? (write - read) : (size - read + write);
donatien 0:013f5d54248c 82 mtx.unlock();
donatien 0:013f5d54248c 83 return a;
donatien 0:013f5d54248c 84 }
donatien 0:013f5d54248c 85
donatien 0:013f5d54248c 86 bool dequeue(T * c)
donatien 0:013f5d54248c 87 {
donatien 0:013f5d54248c 88 mtx.lock();
donatien 0:013f5d54248c 89 bool empty = (read == write);
donatien 0:013f5d54248c 90 if (!empty)
donatien 0:013f5d54248c 91 {
donatien 0:013f5d54248c 92 *c = buf[read++];
donatien 0:013f5d54248c 93 read %= size;
donatien 0:013f5d54248c 94 }
donatien 0:013f5d54248c 95 mtx.unlock();
donatien 0:013f5d54248c 96 return (!empty);
donatien 0:013f5d54248c 97 }
donatien 0:013f5d54248c 98
donatien 0:013f5d54248c 99 private:
donatien 0:013f5d54248c 100 volatile uint16_t write;
donatien 0:013f5d54248c 101 volatile uint16_t read;
donatien 0:013f5d54248c 102 volatile T buf[size];
donatien 0:013f5d54248c 103 Mutex mtx;
donatien 0:013f5d54248c 104 };
donatien 0:013f5d54248c 105
donatien 0:013f5d54248c 106 #endif
donatien 0:013f5d54248c 107