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// unique_lock::operator= example
#include <iostream> // std::cout
#include <thread> // std::thread
#include <mutex> // std::mutex, std::unique_lock
std::mutex mtx; // mutex for critical section
void print_fifty (char c) {
std::unique_lock<std::mutex> lck; // default-constructed
lck = std::unique_lock<std::mutex>(mtx); // move-assigned
for (int i=0; i<50; ++i) { std::cout << c; }
std::cout << '\n';
}
int main ()
{
std::thread th1 (print_fifty,'*');
std::thread th2 (print_fifty,'$');
th1.join();
th2.join();
return 0;
}
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