mariadb-columnstore-engine/utils/threadpool/wtp.cpp

/* Copyright (C) 2014 InfiniDB, Inc.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; version 2 of
   the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   MA 02110-1301, USA. */

#include <string>
#include <stdexcept>
#include <iostream>
#include <fstream>
using namespace std;
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <boost/thread.hpp>
#include <boost/scoped_ptr.hpp>
#include <boost/scoped_array.hpp>
#include <boost/shared_ptr.hpp>

#include "weightedthreadpool.h"

int thecount = 0;
boost::mutex mutex;

// Functor class
struct foo
{
  void operator()()
  {
    for (int i = 0; i < 1024 * 1024 * 10; i++)
      // simulate some work
      fData++;

    // boost::mutex::scoped_lock lock(mutex);
    // std::cout << "foo count = " << ++thecount << " " << fData << std::endl;
  }

  foo(int i) : fData(i)
  {
  }

  foo(const foo& copy) : fData(copy.fData)
  {
  }

  int fData;
};

int main(int argc, char** argv)
{
  threadpool::WeightedThreadPool pool(100, 10, 5);

  for (int y = 0; y < 10; y++)
  {
    foo bar(y);

    for (int i = 0; i < 10; ++i)
    {
      pool.invoke(bar, 25);
    }

    boost::mutex::scoped_lock lock(mutex);
    std::cout << "count = " << ++thecount << std::endl;

    // Wait until all of the queued up and in-progress work has finished
    pool.wait();
    pool.dump();
  }
}