This commit is contained in:
Erik Frojdh 2020-02-03 11:04:49 +01:00
parent 9f79f132b7
commit a3c686d271
4 changed files with 89 additions and 103 deletions

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@ -17,7 +17,7 @@
#include <pthread.h>
#include "analogDetector.h"
#include "circularFifo.h"
#include "CircularFifo.h"
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>

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@ -1,79 +1,71 @@
#pragma once
/* CircularFifo.h
* Code & platform dependent issues with it was originally
* published at http://www.kjellkod.cc/threadsafecircularqueue
* 2009-11-02
* @author Kjell Hedstr<EFBFBD>m, hedstrom@kjellkod.cc
* modified by the sls detetor group
* */
/* CircularFifo.h
* Code & platform dependent issues with it was originally
* published at http://www.kjellkod.cc/threadsafecircularqueue
* 2009-11-02
* @author Kjell Hedstr<EFBFBD>m, hedstrom@kjellkod.cc
* modified by the sls detetor group
* */
#include <iostream>
#include <semaphore.h>
#include <vector>
#include <iostream>
/** Circular Fifo (a.k.a. Circular Buffer)
* Thread safe for one reader, and one writer */
template<typename Element>
class CircularFifo {
public:
* Thread safe for one reader, and one writer */
template <typename Element> class CircularFifo {
private:
std::vector<Element *> array;
unsigned int tail; // input index
unsigned int head; // output index
unsigned int Capacity;
mutable sem_t data_mutex;
mutable sem_t free_mutex;
unsigned int increment(unsigned int idx_) const;
CircularFifo(unsigned int Size) : tail(0), head(0){
Capacity = Size + 1;
array.resize(Capacity);
sem_init(&data_mutex,0,0);
sem_init(&free_mutex,0,Size);
}
virtual ~CircularFifo() {
sem_destroy(&data_mutex);
sem_destroy(&free_mutex);
}
public:
CircularFifo(unsigned int Size) : tail(0), head(0) {
Capacity = Size + 1;
array.resize(Capacity);
sem_init(&data_mutex, 0, 0);
sem_init(&free_mutex, 0, Size);
}
virtual ~CircularFifo() {
sem_destroy(&data_mutex);
sem_destroy(&free_mutex);
}
bool push(Element*& item_, bool no_block=false);
bool pop(Element*& item_, bool no_block=false);
bool push(Element *&item_, bool no_block = false);
bool pop(Element *&item_, bool no_block = false);
bool isEmpty() const;
bool isFull() const;
bool isEmpty() const;
bool isFull() const;
int getDataValue() const;
int getFreeValue() const;
private:
std::vector <Element*> array;
unsigned int tail; // input index
unsigned int head; // output index
unsigned int Capacity;
mutable sem_t data_mutex;
mutable sem_t free_mutex;
unsigned int increment(unsigned int idx_) const;
int getDataValue() const;
int getFreeValue() const;
};
template<typename Element>
int CircularFifo<Element>::getDataValue() const
{
int value;
sem_getvalue(&data_mutex, &value);
return value;
template <typename Element> int CircularFifo<Element>::getDataValue() const {
int value;
sem_getvalue(&data_mutex, &value);
return value;
}
template<typename Element>
int CircularFifo<Element>::getFreeValue() const
{
template <typename Element> int CircularFifo<Element>::getFreeValue() const {
int value;
sem_getvalue(&free_mutex, &value);
return value;
}
/** Producer only: Adds item to the circular queue.
* If queue is full at 'push' operation no update/overwrite
* will happen, it is up to the caller to handle this case
*
* \param item_ copy by reference the input item
* \param no_block if true, return immediately if fifo is full
* \return whether operation was successful or not */
template<typename Element>
bool CircularFifo<Element>::push(Element*& item_, bool no_block)
{
* If queue is full at 'push' operation no update/overwrite
* will happen, it is up to the caller to handle this case
*
* \param item_ copy by reference the input item
* \param no_block if true, return immediately if fifo is full
* \return whether operation was successful or not */
template <typename Element>
bool CircularFifo<Element>::push(Element *&item_, bool no_block) {
// check for fifo full
if (no_block && isFull())
return false;
@ -86,64 +78,57 @@ bool CircularFifo<Element>::push(Element*& item_, bool no_block)
}
/** Consumer only: Removes and returns item from the queue
* If queue is empty at 'pop' operation no retrieve will happen
* It is up to the caller to handle this case
*
* \param item_ return by reference the wanted item
* \param no_block if true, return immediately if fifo is full
* \return whether operation was successful or not */
template<typename Element>
bool CircularFifo<Element>::pop(Element*& item_, bool no_block)
{
* If queue is empty at 'pop' operation no retrieve will happen
* It is up to the caller to handle this case
*
* \param item_ return by reference the wanted item
* \param no_block if true, return immediately if fifo is full
* \return whether operation was successful or not */
template <typename Element>
bool CircularFifo<Element>::pop(Element *&item_, bool no_block) {
// check for fifo empty
if (no_block && isEmpty())
return false;
sem_wait(&data_mutex);
item_ = array[head];
head = increment(head);
sem_post(&free_mutex);
return true;
sem_wait(&data_mutex);
item_ = array[head];
head = increment(head);
sem_post(&free_mutex);
return true;
}
/** Useful for testinng and Consumer check of status
* Remember that the 'empty' status can change quickly
* as the Procuder adds more items.
*
* \return true if circular buffer is empty */
template<typename Element>
bool CircularFifo<Element>::isEmpty() const
{
* Remember that the 'empty' status can change quickly
* as the Procuder adds more items.
*
* \return true if circular buffer is empty */
template <typename Element> bool CircularFifo<Element>::isEmpty() const {
return (getDataValue() == 0);
}
/** Useful for testing and Producer check of status
* Remember that the 'full' status can change quickly
* as the Consumer catches up.
*
* \return true if circular buffer is full. */
template<typename Element>
bool CircularFifo<Element>::isFull() const
{
* Remember that the 'full' status can change quickly
* as the Consumer catches up.
*
* \return true if circular buffer is full. */
template <typename Element> bool CircularFifo<Element>::isFull() const {
return (getFreeValue() == 0);
}
/** Increment helper function for index of the circular queue
* index is inremented or wrapped
*
* \param idx_ the index to the incremented/wrapped
* \return new value for the index */
template<typename Element>
unsigned int CircularFifo<Element>::increment(unsigned int idx_) const
{
// increment or wrap
// =================
// index++;
// if(index == array.lenght) -> index = 0;
//
//or as written below:
// index = (index+1) % array.length
idx_ = (idx_+1) % Capacity;
return idx_;
* index is inremented or wrapped
*
* \param idx_ the index to the incremented/wrapped
* \return new value for the index */
template <typename Element>
unsigned int CircularFifo<Element>::increment(unsigned int idx_) const {
// increment or wrap
// =================
// index++;
// if(index == array.lenght) -> index = 0;
//
// or as written below:
// index = (index+1) % array.length
idx_ = (idx_ + 1) % Capacity;
return idx_;
}

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@ -12,7 +12,7 @@
#include "sls_detector_defs.h"
#include "logger.h"
#include "circularFifo.h"
#include "CircularFifo.h"
class Fifo : private virtual slsDetectorDefs {

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@ -1,4 +1,5 @@
target_sources(tests PRIVATE
${CMAKE_CURRENT_SOURCE_DIR}/test-GeneralData.cpp
${CMAKE_CURRENT_SOURCE_DIR}/test-FileNames.cpp
${CMAKE_CURRENT_SOURCE_DIR}/test-CircularFifo.cpp
)