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/* multi-threaded signal invocation benchmark */
// Copyright Frank Mori Hess 2007-2008.
// 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)
#include <cstdlib>
#include <iostream>
#include <boost/bind/bind.hpp>
#include <boost/signals2.hpp>
#include <boost/thread/thread.hpp>
using namespace boost::placeholders;
typedef boost::signals2::signal<void ()> signal_type;
void myslot()
{
/* std::cout << __FUNCTION__ << std::endl;
sleep(1);*/
}
void thread_initial(signal_type *signal, unsigned num_invocations)
{
unsigned i;
for(i = 0; i < num_invocations; ++i)
{
(*signal)();
}
}
int main(int argc, const char **argv)
{
if(argc < 3)
{
std::cerr << "usage: " << argv[0] << " <num threads> <num connections>" << std::endl;
return -1;
}
static const unsigned num_threads = std::strtol(argv[1], 0, 0);
static const unsigned num_connections = std::strtol(argv[2], 0, 0);
boost::thread_group threads;
signal_type sig;
std::cout << "Connecting " << num_connections << " connections to signal.\n";
unsigned i;
for(i = 0; i < num_connections; ++i)
{
sig.connect(&myslot);
}
const unsigned num_slot_invocations = 1000000;
const unsigned signal_invocations_per_thread = num_slot_invocations / (num_threads * num_connections);
std::cout << "Launching " << num_threads << " thread(s) to invoke signal " << signal_invocations_per_thread << " times per thread.\n";
for(i = 0; i < num_threads; ++i)
{
threads.create_thread(boost::bind(&thread_initial, &sig, signal_invocations_per_thread));
}
threads.join_all();
return 0;
}
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