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// 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)
//[stack_example
#include <boost/lockfree/stack.hpp>
#include <boost/thread/thread.hpp>
#include <iostream>
#include <boost/atomic.hpp>
boost::atomic_int producer_count( 0 );
boost::atomic_int consumer_count( 0 );
boost::lockfree::stack< int > stack( 128 );
const int iterations = 1000000;
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 ( !stack.push( value ) )
;
}
}
boost::atomic< bool > done( false );
void consumer( void )
{
int value;
while ( !done ) {
while ( stack.pop( value ) )
++consumer_count;
}
while ( stack.pop( value ) )
++consumer_count;
}
int main( int argc, char* argv[] )
{
using namespace std;
cout << "boost::lockfree::stack is ";
if ( !stack.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;
}
//]
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