For the sake of learning i am trying to develp a pool executor... but
it doesnt work.. can u ppl tell me where i am goin wrong? I am getting
an assertion failure in windows in the line below with comments, in
file PoolExecutor.h..
/*
main.cpp
*/
#include <pthread.h>
#include <iostream>
#include <windows.h>
#include "PoolExecutor.h"
using namespace std;
class Runner{
public:
Runner(){}
~Runner(){}
void run(){
for(int i=0;i<100;++i)
cout<<"i="<<i << " in thread "<<
((int)pthread_self().p) <<endl;
}
};
int main(){
PoolExecutor pool(10);
pool.execute(((Runnable *)new Runner()));
pool.execute(((Runnable *)new Runner()));
pool.execute(((Runnable *)new Runner()));
Sleep(1000);
return 0;
}
///////////////////////////////////////////////////////////////////////////next
file//////////////////////////////////////////
/*in file PoolExecutor.h*/
#include<pthread.h>
#include<queue>
#include<windows.h>
class PoolExecutor;
void *func(void *temp);
class Runnable{
public:
virtual void run()=0;
};
class Thread{
pthread_t threadId;
Runnable *runnable;
public:
Thread(){
runnable=NULL;
}
void start(PoolExecutor *pthRun){
int started = pthread_create (&threadId, NULL, func, pthRun);
std::cout<< started<<std::endl;
}
void join(){
pthread_join(threadId,NULL);
}
};
class PoolExecutor{
Thread *threads;
int N;
bool cancelled ;
std::queue<Runnable*> taskQueue;
pthread_mutex_t taskQueueMutex;
public:
PoolExecutor(int numberOfThreads){
N=numberOfThreads;
if(numberOfThreads<=0 && numberOfThreads>512)
N=5;
cancelled= false;
pthread_mutex_init(&taskQueueMutex,NULL);
threads = new Thread[N];
for(int i=0;i<N;++i)
threads[i].start(this);
}
~PoolExecutor(){
cancelled = true;
for(int i=0;i<N;++i)
threads[i].join();
delete[] threads;
}
void execute(Runnable* runnable ){
pthread_mutex_lock(&taskQueueMutex);
taskQueue.push(runnable);
pthread_mutex_unlock(&taskQueueMutex);
}
void* runMethod(void * param){
for(;;){
while(taskQueue.empty()&& !cancelled){
Sleep(100);
}
if(cancelled){
return NULL;
}
pthread_mutex_lock(&taskQueueMutex);
if(taskQueue.empty()){
pthread_mutex_unlock(&taskQueueMutex);
continue;
}
Runnable *runnable = (Runnable *)taskQueue.front();
////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////// i get error in the above line
////////////////////////////////////////////////////////////////////////////////////////////////
taskQueue.pop();
pthread_mutex_unlock(&taskQueueMutex);
runnable->run();
delete runnable;
if(cancelled){
return NULL;
}
}
return NULL;
}
};
void *func(void *temp){
PoolExecutor *poolExecutor = (PoolExecutor *)temp;
return poolExecutor->runMethod(NULL);
}
Thanks
