C++ Thread Using Boost library sample

This post is the sample of essentials C++ thread using boost::threads library

#include <iostream>
#include <sstream>
#include <vector>
#include <string>
#include <boost/thread.hpp>
#include <boost/date_time.hpp>
#include <boost/bind.hpp>
#include "Elapsed.hpp"

const std::string RowRowRow("Row row row your boat gently down the stream");
const std::string Teapot("I'm a little teapot short and stout");

void sing(const std::string& lyrics,boost::posix_time::time_duration interval,bool indent=false) {
std::istringstream iss;
iss.str(lyrics);
std::string current;
do {
iss >> current;
if (iss) {
// extra spaces make it easier to read when interleaved by threading
if (indent)
std::cout << "\t\t";
std::cout  << current << "\n";
boost::this_thread::sleep( interval );
} // end if
} while ( !iss.bad() && !iss.eof() );
std::cout << "\n";
} // end sing()


class Singer {
std::string m_lyrics;
boost::posix_time::time_duration m_interval;
bool m_indent;
public:
Singer(const std::string& lyrics,boost::posix_time::time_duration interval,bool indent)
:
m_lyrics(lyrics),
m_interval(interval),
m_indent(indent)
{

} // end constructor
void perform() {
sing(m_lyrics,m_interval,m_indent);
} // end perform()
}; // end class Singer


int main(int argc,char* argv[]) {
using namespace boost::posix_time;


time_duration interval( milliseconds(250) );
auto delay( milliseconds(60) );

// "sing" with a function
sing( RowRowRow, interval );


// delay
boost::this_thread::sleep( delay );

// "sing" with a member function
Singer teapotSinger(Teapot,interval,true);
teapotSinger.perform();


return 0;
} // end main()

Reference

http://www.advancedcplusplus.com/5min-threads/