hi ,
i am implementing parallel_pipeline function in one code and sometimes according to my condition pipeline stops but sometimes it doesn't . i am unable to find the reason .Please help where it gets stucked.
Code which i am using is :
#include <iostream>
#include <sstream>
#include <fstream>
#include <vector>
#include <algorithm>
#include <tbb/pipeline.h>
#include <tbb/atomic.h>
#include <tbb/concurrent_queue.h>
#include <tbb/compat/thread>
#include <tbb/tbbmalloc_proxy.h>
#include <tbb/tick_count.h>
using namespace std;
using namespace tbb;
#define pi 3.141593
#define FILTER_LEN 265
class MyBuffer
{
public:
double *acc;
double *buffer;
int start,end;
static int j;
MyBuffer()
{
start=0;
end=0;
buffer=new double[150264];
acc=new double[150000];
fill_n(buffer,150264,0);
}
~MyBuffer()
{
delete[] buffer;
delete[] acc;
}
int startnumber()
{
return start;
}
int endnumber()
{
return end;
}
};
typedef concurrent_bounded_queue<MyBuffer> QueueMyBufferType;
QueueMyBufferType chunk_queue;
int MyBuffer::j=0;
int queueloopcount=30;
void input_function()
{
stop_flag = false;
cout<<"thread reached to call input function "<<endl;
ofstream o("testing sinewave.csv");
int counter=0;
while(counter<150000)
{
// cout<<"value of counter is \t"<<counter << endl;
MyBuffer *b=new MyBuffer;
b->start=(FILTER_LEN-1+(counter));
b->end=(5264+(counter));
// cout<<"value of b.start is and b.end is "<<b->start<<"\t"<<b->end<<endl;
for(int i =b->startnumber(); i <b->endnumber(); i++)
{
b->buffer[i] = sin(700 * (2 * pi) * (i / 5000.0));
o<<b->buffer[i]<<endl;
}
chunk_queue.push(*b);
counter+=5000;
// cout<<"value of queueloopcount is "<< queueloopcount << endl;
}
cout<<"all data is perfectly generated"<<endl;
}
int main()
{
int ntokens = 8;
thread inputfunc(input_function);
tick_count t1,t2;
ofstream o("filter700Hz.csv");
t1=tick_count::now();
bool stop_pipeline = false;
stop_filter=false;
/* MyBuffer *b=new MyBuffer;
while(queueloopcount!=0)
{
chunk_queue.pop(*b);
{
cout<<"value of start and end popped is "<<b->startnumber()<<"\t"<<b->endnumber()<<endl;
queueloopcount--;
}
} */
inputfunc.join();
parallel_pipeline(ntokens,make_filter<void,MyBuffer*>
(
filter::parallel,[&](flow_control& fc)->MyBuffer*
{
if(queueloopcount==0)
{
fc.stop();
cout<<"pipeline stopped"<<endl;
}
else
{
MyBuffer *b=new MyBuffer;
chunk_queue.pop(*b);
{
cout<<"value of start and end popped is "<<b->startnumber()<<"\t"<<b->endnumber()<<endl;
queueloopcount--;
}
return b;
}
}
)&
make_filter<MyBuffer*, void>
(
filter::serial,[&](MyBuffer* b)
{
cout<<"value of second filter start is and end is \t "<< b->startnumber() << "\t"<< b->endnumber() <<endl;
}
)
);
t2=tick_count::now();
cout << "\n Time elapsed is \n\n"<<(t2-t1).seconds()<<endl;
return 0;
}
