#include // std::cout
#include // std::thread
void foo()
{
for (int i = 0; i < 1500000000; i++);
}
void bar(int x)
{
for (int i = 0; i < 1500000000; i++);
}
using namespace std;
int main()
{
std::thread first(foo); // spawn new thread that calls foo()
std::thread second(bar, 0); // spawn new thread that calls bar(0)
std::thread third(foo);
std::thread fourth(foo);
std::cout << "main, foo and bar now execute concurrently...\n";
// synchronize threads:
first.join(); // pauses until first finishes
second.join(); // pauses until second finishes
third.join();
fourth.join();
std::cout << "foo and bar completed.\n";
cout << "Done in " << clock() * 1000 / CLOCKS_PER_SEC << endl;
getchar();
return 0;
}