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 // id get_id() 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 
G()30     G() : alive_(1) {++n_alive;}
G(const G & g)31     G(const G& g) : alive_(g.alive_) {++n_alive;}
~G()32     ~G() {alive_ = 0; --n_alive;}
33 
operator ()()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 
main()45 int main()
46 {
47     {
48         std::thread t0((G()));
49         std::thread::id id0 = t0.get_id();
50         std::thread t1;
51         std::thread::id id1 = t1.get_id();
52         assert(t0.get_id() != id1);
53         assert(t1.get_id() == std::thread::id());
54         t0.join();
55     }
56 }
57