May 01, 2002
The Boost.Threads Library
May 2002/The Boost.Threads Library/Listing 6
#include <boost/thread/thread.hpp>
#include <boost/thread/once.hpp>
#include <iostream>
int i = 0;
boost::once_flag flag =
BOOST_ONCE_INIT;
void init()
{
++i;
}
void thread()
{
boost::call_once(&init, flag);
}
int main(int argc, char* argv[])
{
boost::thread thrd1(&thread);
boost::thread thrd2(&thread);
thrd1.join();
thrd2.join();
std::cout << i << std::endl;
return 0;
}
— End of Listing —
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