inline
void fn2( boost::fibers::barrier & b)
{
boost::fibers::fiber::id id = boost::this_fiber::get_id();
std::cout << "fiber " << id << ": fn2 entered" << std::endl;
++value2;
std::cout << "fiber " << id << ": incremented value2: " << value2 << std::endl;
boost::this_fiber::yield();
++value2;
std::cout << "fiber " << id << ": incremented value2: " << value2 << std::endl;
boost::this_fiber::yield();
++value2;
std::cout << "fiber " << id << ": incremented value2: " << value2 << std::endl;
boost::this_fiber::yield();
std::cout << "fiber " << id << ": waits for barrier" << std::endl;
b.wait();
std::cout << "fiber " << id << ": passed barrier" << std::endl;
++value2;
std::cout << "fiber " << id << ": incremented value2: " << value2 << std::endl;
boost::this_fiber::yield();
std::cout << "fiber " << id << ": fn2 returns" << std::endl;
}
void fn2( boost::fibers::barrier & b) {
++value2;
boost::this_fiber::yield();
++value2;
boost::this_fiber::yield();
++value2;
boost::this_fiber::yield();
b.wait();
++value2;
boost::this_fiber::yield();
++value2;
}
/*****************************************************************************
* fiber function per client
*****************************************************************************/
void client( boost::asio::io_service & io_svc, tcp::acceptor & a,
boost::fibers::barrier& barrier, unsigned iterations) {
print( tag(), ": echo-client started");
for (unsigned count = 0; count < iterations; ++count) {
tcp::resolver resolver( io_svc);
tcp::resolver::query query( tcp::v4(), "127.0.0.1", "9999");
tcp::resolver::iterator iterator = resolver.resolve( query);
tcp::socket s( io_svc);
boost::asio::connect( s, iterator);
for (unsigned msg = 0; msg < 1; ++msg) {
std::ostringstream msgbuf;
msgbuf << "from " << fiber_names.lookup() << " " << count << "." << msg;
std::string message(msgbuf.str());
print( tag(), ": Sending: ", message);
boost::system::error_code ec;
boost::asio::async_write(
s,
boost::asio::buffer( message),
boost::fibers::asio::yield[ec]);
if ( ec == boost::asio::error::eof) {
return; //connection closed cleanly by peer
} else if ( ec) {
throw boost::system::system_error( ec); //some other error
}
char reply[max_length];
size_t reply_length = s.async_read_some(
boost::asio::buffer( reply, max_length),
boost::fibers::asio::yield[ec]);
if ( ec == boost::asio::error::eof) {
return; //connection closed cleanly by peer
} else if ( ec) {
throw boost::system::system_error( ec); //some other error
}
print( tag(), ": Reply : ", std::string( reply, reply_length));
}
}
// done with all iterations, wait for rest of client fibers
if ( barrier.wait()) {
// exactly one barrier.wait() call returns true
// we're the lucky one
a.close();
print( tag(), ": acceptor stopped");
}
print( tag(), ": echo-client stopped");
}
