terminate called after throwing an instance of 'std::system_error'l
what(): Invalid argument
#ifndef CPP_PLAZZA_EXAMPLE_H
#define CPP_PLAZZA_EXAMPLE_H
#include <thread>
#include <vector>
#include <list>
#include <memory>
#include <functional>
#include <mutex>
#include <condition_variable>
#include <atomic>
#include <iterator>
#include <tuple>
class ThreadPool
{
public:
ThreadPool(size_t numThreads);
virtual ~ThreadPool();
void executeJob(std::function<void()> job, std::function<void()> notificationJob);
void wait_for_done();
private:
void loop();
std::pair<std::function<void()>, std::function<void()> > getNextJob();
std::vector<std::thread> m_workers;
std::list<std::pair<std::function<void()>, std::function<void()> > > m_jobs;
std::mutex m_lockJobsList;
std::condition_variable m_notifyJob;
std::atomic<bool> m_bTerminate;
class Terminated: public std::runtime_error
{
public:
Terminated(const std::string& what): std::runtime_error(what) {}
};
};
#endif //CPP_PLAZZA_EXAMPLE_H
and here it is my .cpp
#include <iostream>
#include "example.h"
ThreadPool::ThreadPool(size_t numThreads):
m_workers(numThreads), m_bTerminate(false) {
m_workers.reserve(numThreads);
for (size_t i = 0; i < numThreads; i++) {
this->m_workers.emplace_back(&ThreadPool::loop, this);
}
/*for (std::vector<std::thread>::iterator it = this->m_workers.begin(); it != this->m_workers.end(); it++)
assert(std::next(it, 1) ==);*/
}
ThreadPool::~ThreadPool() {
{
std::unique_lock<std::mutex> lockList(m_lockJobsList);
m_bTerminate = true;
m_notifyJob.notify_all();
}
/* for(std::vector<std::thread>::iterator it = m_workers.begin(); it != m_workers.end(); it++) {
it->join();
}*/
std::this_thread::sleep_for(std::chrono::seconds(5));
}
void ThreadPool::executeJob(std::function<void()> job, std::function<void()> notificationJob) {
std::unique_lock<std::mutex> lockList(m_lockJobsList);
m_jobs.emplace_back(std::pair<std::function<void()>, std::function<void()> >(std::move(job), std::move(notificationJob)));
std::cout << m_jobs.size() << std::endl;
m_notifyJob.notify_one();
}
std::pair<std::function<void()>, std::function<void()> > ThreadPool::getNextJob() {
std::unique_lock<std::mutex> lockList(m_lockJobsList);
while(!m_bTerminate)
{
if(!m_jobs.empty())
{
std::cout << "ici" << std::endl;
std::pair<std::function<void()>, std::function<void()>> job = std::ref(m_jobs.front());
m_jobs.pop_front();
return job;
}
m_notifyJob.wait(lockList);
}
throw Terminated("Thread terminated");
}
void func1() {
std::cout << "BONJOUR je suis func1" << std::endl;
}
void ThreadPool::loop()
{
try
{
for(;;)
{
std::pair<std::function<void()>, std::function<void()> > job = getNextJob();
job.first();
job.second();
}
}
catch(Terminated& e)
{
}
}
void func2() {
std::cout << "AUREVOIR je suis func2" << std::endl;
}
void ThreadPool::wait_for_done()
{
std::cout << "nb workers = " << this->m_workers.size() << std::endl;
int i = 0;
for(std::vector<std::thread>::iterator it = m_workers.begin(); it != m_workers.end(); ++it) {
std::cout << "je suis i : " << i << std::endl;
i++;
(*it).join();
}
}
int main()
{
ThreadPool pool(6);
pool.executeJob(func1, func2);
pool.wait_for_done();
}
I think that my error is I join several time on one thread but how to fix it ?
Compilation line :
g++ -Wall -Werror -W -Wextra example.cpp -pthread -std=c++11
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