1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // UNSUPPORTED: libcpp-has-no-threads 11 12 // <thread> 13 14 // class thread 15 16 // bool joinable() const; 17 18 #include <thread> 19 #include <new> 20 #include <cstdlib> 21 #include <cassert> 22 23 class G 24 { 25 int alive_; 26 public: 27 static int n_alive; 28 static bool op_run; 29 30 G() : alive_(1) {++n_alive;} 31 G(const G& g) : alive_(g.alive_) {++n_alive;} 32 ~G() {alive_ = 0; --n_alive;} 33 34 void operator()() 35 { 36 assert(alive_ == 1); 37 assert(n_alive >= 1); 38 op_run = true; 39 } 40 }; 41 42 int G::n_alive = 0; 43 bool G::op_run = false; 44 45 int main() 46 { 47 { 48 G g; 49 std::thread t0(g); 50 assert(t0.joinable()); 51 t0.join(); 52 assert(!t0.joinable()); 53 } 54 } 55
