70 lines
1.6 KiB
C++
70 lines
1.6 KiB
C++
// Copyright (C) 2009 Tim Blechmann
|
|
//
|
|
// Distributed under the Boost Software License, Version 1.0. (See
|
|
// accompanying file LICENSE_1_0.txt or copy at
|
|
// http://www.boost.org/LICENSE_1_0.txt)
|
|
|
|
//[queue_example
|
|
#include <boost/thread/thread.hpp>
|
|
#include <boost/lockfree/queue.hpp>
|
|
#include <iostream>
|
|
|
|
#include <boost/atomic.hpp>
|
|
|
|
boost::atomic_int producer_count(0);
|
|
boost::atomic_int consumer_count(0);
|
|
|
|
boost::lockfree::queue<int> queue(128);
|
|
|
|
const int iterations = 10000000;
|
|
const int producer_thread_count = 4;
|
|
const int consumer_thread_count = 4;
|
|
|
|
void producer(void)
|
|
{
|
|
for (int i = 0; i != iterations; ++i) {
|
|
int value = ++producer_count;
|
|
while (!queue.push(value))
|
|
;
|
|
}
|
|
}
|
|
|
|
boost::atomic<bool> done (false);
|
|
void consumer(void)
|
|
{
|
|
int value;
|
|
while (!done) {
|
|
while (queue.pop(value))
|
|
++consumer_count;
|
|
}
|
|
|
|
while (queue.pop(value))
|
|
++consumer_count;
|
|
}
|
|
|
|
int main(int argc, char* argv[])
|
|
{
|
|
using namespace std;
|
|
cout << "boost::lockfree::queue is ";
|
|
if (!queue.is_lock_free())
|
|
cout << "not ";
|
|
cout << "lockfree" << endl;
|
|
|
|
boost::thread_group producer_threads, consumer_threads;
|
|
|
|
for (int i = 0; i != producer_thread_count; ++i)
|
|
producer_threads.create_thread(producer);
|
|
|
|
for (int i = 0; i != consumer_thread_count; ++i)
|
|
consumer_threads.create_thread(consumer);
|
|
|
|
producer_threads.join_all();
|
|
done = true;
|
|
|
|
consumer_threads.join_all();
|
|
|
|
cout << "produced " << producer_count << " objects." << endl;
|
|
cout << "consumed " << consumer_count << " objects." << endl;
|
|
}
|
|
//]
|