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Dependents:   M2X_dev axeda_wrapper_dev MTS_M2x_Example1 MTS_Cellular_Connect_Example ... more

utils/MTSCircularBuffer.cpp@46:b30547bf07d5, 2013-12-19 (annotated)

Committer:
jengbrecht
Date:
Thu Dec 19 21:48:32 2013 +0000
Revision:
46:b30547bf07d5
Parent:
45:40745c2036cf
Parent:
43:3cacf019ed7d
Child:
60:ee9c7a700330
Child:
64:0ca9c7123ffc
Merged, removed Axeda Wrapper

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jengbrecht 0:563b70517320 1 #ifndef MTSCIRCULARBUFFER_CPP
jengbrecht 0:563b70517320 2 #define MTSCIRCULARBUFFER_CPP
jengbrecht 0:563b70517320 3
jengbrecht 0:563b70517320 4 #include "MTSCircularBuffer.h"
jengbrecht 0:563b70517320 5
mfiore 39:6e94520a3217 6 using namespace mts;
mfiore 39:6e94520a3217 7
mfiore 2:8d3ea0dfce39 8 MTSCircularBuffer::MTSCircularBuffer(int bufferSize) : bufferSize(bufferSize), readIndex(0), writeIndex(0), _threshold(-1), _op(Vars::GREATER)
jengbrecht 0:563b70517320 9 {
jengbrecht 0:563b70517320 10 buffer = new char[bufferSize];
jengbrecht 0:563b70517320 11 }
jengbrecht 0:563b70517320 12
jengbrecht 0:563b70517320 13 MTSCircularBuffer::~MTSCircularBuffer()
jengbrecht 0:563b70517320 14 {
jengbrecht 0:563b70517320 15 delete[] buffer;
jengbrecht 0:563b70517320 16 }
jengbrecht 0:563b70517320 17
jengbrecht 0:563b70517320 18 int MTSCircularBuffer::getSize()
jengbrecht 0:563b70517320 19 {
jengbrecht 0:563b70517320 20 return bufferSize;
jengbrecht 0:563b70517320 21 }
jengbrecht 0:563b70517320 22
jengbrecht 0:563b70517320 23 int MTSCircularBuffer::read(char* data, int length)
jengbrecht 0:563b70517320 24 {
jengbrecht 0:563b70517320 25 int i = 0;
jengbrecht 0:563b70517320 26 while ((i < length) && (available() > 0)) {
jengbrecht 0:563b70517320 27 if (readIndex == bufferSize) {
jengbrecht 0:563b70517320 28 readIndex = 0;
jengbrecht 0:563b70517320 29 }
jengbrecht 0:563b70517320 30 data[i++] = buffer[readIndex++];
jengbrecht 0:563b70517320 31 }
jengbrecht 0:563b70517320 32 checkThreshold();
jengbrecht 0:563b70517320 33 return i;
jengbrecht 0:563b70517320 34 }
jengbrecht 0:563b70517320 35
sgodinez 17:2d7c4ea7491b 36 int MTSCircularBuffer::read(char& data)
jengbrecht 0:563b70517320 37 {
jengbrecht 0:563b70517320 38 if (available() == 0) {
sgodinez 35:f28acb1be52d 39 return 0;
jengbrecht 0:563b70517320 40 }
jengbrecht 0:563b70517320 41 if (readIndex == bufferSize) {
jengbrecht 0:563b70517320 42 readIndex = 0;
jengbrecht 0:563b70517320 43 }
sgodinez 17:2d7c4ea7491b 44 data = buffer[readIndex++];
jengbrecht 0:563b70517320 45 checkThreshold();
sgodinez 17:2d7c4ea7491b 46 return 1;
jengbrecht 0:563b70517320 47 }
jengbrecht 0:563b70517320 48
sgodinez 41:81d035fb0b6a 49 int MTSCircularBuffer::write(const char* data, int length)
jengbrecht 0:563b70517320 50 {
jengbrecht 0:563b70517320 51 int i = 0;
jengbrecht 0:563b70517320 52 while((i < length) && (available() < bufferSize)) {
jengbrecht 0:563b70517320 53 if(writeIndex == bufferSize) {
jengbrecht 0:563b70517320 54 writeIndex = 0;
jengbrecht 0:563b70517320 55 }
jengbrecht 0:563b70517320 56 buffer[writeIndex++] = data[i++];
jengbrecht 0:563b70517320 57 }
jengbrecht 0:563b70517320 58 checkThreshold();
mfiore 2:8d3ea0dfce39 59 return i;
jengbrecht 0:563b70517320 60 }
jengbrecht 0:563b70517320 61
jengbrecht 0:563b70517320 62 int MTSCircularBuffer::write(char data)
jengbrecht 0:563b70517320 63 {
jengbrecht 0:563b70517320 64 if (available() == bufferSize) {
sgodinez 35:f28acb1be52d 65 return 0;
jengbrecht 0:563b70517320 66 }
jengbrecht 0:563b70517320 67 if(writeIndex == bufferSize) {
jengbrecht 0:563b70517320 68 writeIndex = 0;
jengbrecht 0:563b70517320 69 }
jengbrecht 0:563b70517320 70 buffer[writeIndex++] = data;
jengbrecht 0:563b70517320 71 checkThreshold();
mfiore 2:8d3ea0dfce39 72 return 1;
jengbrecht 0:563b70517320 73 }
jengbrecht 0:563b70517320 74
jengbrecht 0:563b70517320 75 int MTSCircularBuffer::capacity()
jengbrecht 0:563b70517320 76 {
jengbrecht 0:563b70517320 77 return bufferSize - available();
jengbrecht 0:563b70517320 78 }
jengbrecht 0:563b70517320 79
jengbrecht 0:563b70517320 80 int MTSCircularBuffer::available()
jengbrecht 0:563b70517320 81 {
jengbrecht 0:563b70517320 82 if (readIndex <= writeIndex) {
jengbrecht 0:563b70517320 83 return writeIndex - readIndex;
jengbrecht 0:563b70517320 84 } else {
jengbrecht 0:563b70517320 85 return bufferSize + writeIndex - readIndex;
jengbrecht 0:563b70517320 86 }
jengbrecht 0:563b70517320 87 }
jengbrecht 0:563b70517320 88
jengbrecht 0:563b70517320 89 bool MTSCircularBuffer::isFull()
jengbrecht 0:563b70517320 90 {
jengbrecht 0:563b70517320 91 if (available() == bufferSize) {
jengbrecht 0:563b70517320 92 return true;
jengbrecht 0:563b70517320 93 } else {
jengbrecht 0:563b70517320 94 return false;
jengbrecht 0:563b70517320 95 }
jengbrecht 0:563b70517320 96 }
jengbrecht 0:563b70517320 97
jengbrecht 0:563b70517320 98 bool MTSCircularBuffer::isEmpty()
jengbrecht 0:563b70517320 99 {
jengbrecht 0:563b70517320 100 if (available() == 0) {
jengbrecht 0:563b70517320 101 return true;
jengbrecht 0:563b70517320 102 } else {
jengbrecht 0:563b70517320 103 return false;
jengbrecht 0:563b70517320 104 }
jengbrecht 0:563b70517320 105 }
jengbrecht 0:563b70517320 106
jengbrecht 0:563b70517320 107 void MTSCircularBuffer::clear()
jengbrecht 0:563b70517320 108 {
jengbrecht 0:563b70517320 109 writeIndex = readIndex;
jengbrecht 0:563b70517320 110 }
jengbrecht 0:563b70517320 111
jengbrecht 0:563b70517320 112 void MTSCircularBuffer::checkThreshold()
jengbrecht 0:563b70517320 113 {
mfiore 2:8d3ea0dfce39 114 if (_threshold == -1) {
jengbrecht 0:563b70517320 115 return;
jengbrecht 0:563b70517320 116 }
mfiore 2:8d3ea0dfce39 117 switch (_op) {
jengbrecht 0:563b70517320 118 case Vars::GREATER:
mfiore 2:8d3ea0dfce39 119 if (available() > _threshold) {
jengbrecht 0:563b70517320 120 notify.call();
jengbrecht 0:563b70517320 121 }
jengbrecht 0:563b70517320 122 break;
jengbrecht 0:563b70517320 123 case Vars::LESS:
mfiore 2:8d3ea0dfce39 124 if (available() < _threshold) {
jengbrecht 0:563b70517320 125 notify.call();
jengbrecht 0:563b70517320 126 }
jengbrecht 0:563b70517320 127 break;
jengbrecht 0:563b70517320 128 case Vars::GREATER_EQUAL:
mfiore 2:8d3ea0dfce39 129 if (available() >= _threshold) {
jengbrecht 0:563b70517320 130 notify.call();
jengbrecht 0:563b70517320 131 }
jengbrecht 0:563b70517320 132 break;
jengbrecht 0:563b70517320 133 case Vars::LESS_EQUAL:
mfiore 2:8d3ea0dfce39 134 if (available() <= _threshold) {
jengbrecht 0:563b70517320 135 notify.call();
jengbrecht 0:563b70517320 136 }
jengbrecht 0:563b70517320 137 break;
jengbrecht 0:563b70517320 138 case Vars::EQUAL:
mfiore 2:8d3ea0dfce39 139 if (available() == _threshold) {
jengbrecht 0:563b70517320 140 notify.call();
jengbrecht 0:563b70517320 141 }
jengbrecht 0:563b70517320 142 break;
jengbrecht 0:563b70517320 143 }
jengbrecht 0:563b70517320 144 }
jengbrecht 0:563b70517320 145
jengbrecht 0:563b70517320 146 #endif /* MTSCIRCULARBUFFER_CPP */