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/*
* Copyright (C) 2013 Tommi Maekitalo
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* As a special exception, you may use this file as part of a free
* software library without restriction. Specifically, if other files
* instantiate templates or use macros or inline functions from this
* file, or you compile this file and link it with other files to
* produce an executable, this file does not by itself cause the
* resulting executable to be covered by the GNU General Public
* License. This exception does not however invalidate any other
* reasons why the executable file might be covered by the GNU Library
* General Public License.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <iostream>
#include <cxxtools/thread.h>
#include <cxxtools/threadpool.h>
#include <cxxtools/arg.h>
#include <cxxtools/log.h>
#include <iostream>
unsigned count = 0;
log_define("future")
// this simulates a long running task
void funct()
{
log_info("wait");
cxxtools::Thread::sleep(500);
log_info("Hello " << ++count);
}
class AObject
{
cxxtools::Timespan _waitTime;
public:
AObject(cxxtools::Seconds waitTime)
: _waitTime(waitTime)
{ }
void aMethod();
};
void AObject::aMethod()
{
log_info("wait " << cxxtools::Seconds(_waitTime) << " in a method");
cxxtools::Thread::sleep(_waitTime);
log_info("Hello " << ++count);
}
// Just a simple task
void finish()
{
log_info("finish task");
}
int main(int argc, char* argv[])
{
try
{
log_init();
cxxtools::Arg<unsigned> threads(argc, argv, 't', 5);
cxxtools::Arg<unsigned> tasks(argc, argv, 'n', 17);
// We create a thread pool with 5 threads by default
cxxtools::ThreadPool p(threads);
// Run the above function multiple times
log_info("start tasks");
for (unsigned n = 0; n < tasks; ++n)
p.schedule(cxxtools::callable(funct));
// Run the a method of a object instance multiple times
AObject aObject(cxxtools::Milliseconds(400));
for (unsigned n = 0; n < tasks; ++n)
p.schedule(cxxtools::callable(aObject, &AObject::aMethod));
// Run another job
log_info("start finish task");
cxxtools::ThreadPool::Future f = p.schedule(cxxtools::callable(finish));
// We wait until the finish task is finished.
// This does not mean, that all tasks are finished.
// Others will continue to run on other threads.
// We can also wait with just `f.wait()` without timeout.
log_info("wait for finish task");
bool b;
do {
b = f.wait(cxxtools::Milliseconds(300));
log_info("future returns " << b);
} while (b == false);
log_info("finish task finished");
// This stops the threads when all jobs are done.
p.stop();
log_info("tasks finished");
}
catch (const std::exception& e)
{
std::cerr << e.what() << std::endl;
}
}
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