1*99451b44SJordan Rupprecht #include <chrono> 2*99451b44SJordan Rupprecht #include <thread> 3*99451b44SJordan Rupprecht 4*99451b44SJordan Rupprecht void thread_function()5*99451b44SJordan Rupprechtthread_function () 6*99451b44SJordan Rupprecht { 7*99451b44SJordan Rupprecht // Set thread-specific breakpoint here. 8*99451b44SJordan Rupprecht std::this_thread::sleep_for(std::chrono::milliseconds(20)); 9*99451b44SJordan Rupprecht // On Windows, a sleep_for of less than about 16 ms effectively calls 10*99451b44SJordan Rupprecht // Sleep(0). The MS standard thread implementation uses a system thread 11*99451b44SJordan Rupprecht // pool, which can deadlock on a Sleep(0), hanging not only the secondary 12*99451b44SJordan Rupprecht // thread but the entire test. I increased the delay to 20 ms to ensure 13*99451b44SJordan Rupprecht // Sleep is called with a delay greater than 0. The deadlock potential 14*99451b44SJordan Rupprecht // is described here: 15*99451b44SJordan Rupprecht // https://docs.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-sleep#remarks 16*99451b44SJordan Rupprecht } 17*99451b44SJordan Rupprecht 18*99451b44SJordan Rupprecht int main()19*99451b44SJordan Rupprechtmain () 20*99451b44SJordan Rupprecht { 21*99451b44SJordan Rupprecht // Set main breakpoint here. 22*99451b44SJordan Rupprecht 23*99451b44SJordan Rupprecht #ifdef __APPLE__ 24*99451b44SJordan Rupprecht pthread_setname_np("main-thread"); 25*99451b44SJordan Rupprecht #endif 26*99451b44SJordan Rupprecht 27*99451b44SJordan Rupprecht std::thread t(thread_function); 28*99451b44SJordan Rupprecht t.join(); 29*99451b44SJordan Rupprecht 30*99451b44SJordan Rupprecht thread_function(); 31*99451b44SJordan Rupprecht return 0; 32*99451b44SJordan Rupprecht } 33