1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // UNSUPPORTED: libcpp-has-no-threads
10 
11 // <thread>
12 
13 // class thread
14 
15 // void join();
16 
17 #include <thread>
18 #include <new>
19 #include <cstdlib>
20 #include <cassert>
21 #include <system_error>
22 
23 #include "make_test_thread.h"
24 #include "test_macros.h"
25 
26 class G
27 {
28     int alive_;
29 public:
30     static int n_alive;
31     static bool op_run;
32 
G()33     G() : alive_(1) {++n_alive;}
G(const G & g)34     G(const G& g) : alive_(g.alive_) {++n_alive;}
~G()35     ~G() {alive_ = 0; --n_alive;}
36 
operator ()()37     void operator()()
38     {
39         assert(alive_ == 1);
40         assert(n_alive >= 1);
41         op_run = true;
42     }
43 };
44 
45 int G::n_alive = 0;
46 bool G::op_run = false;
47 
foo()48 void foo() {}
49 
main(int,char **)50 int main(int, char**)
51 {
52     {
53         G g;
54         std::thread t0 = support::make_test_thread(g);
55         assert(t0.joinable());
56         t0.join();
57         assert(!t0.joinable());
58 #ifndef TEST_HAS_NO_EXCEPTIONS
59         try {
60             t0.join();
61             assert(false);
62         } catch (std::system_error const&) {
63         }
64 #endif
65     }
66 #ifndef TEST_HAS_NO_EXCEPTIONS
67     {
68         std::thread t0 = support::make_test_thread(foo);
69         t0.detach();
70         try {
71             t0.join();
72             assert(false);
73         } catch (std::system_error const&) {
74         }
75     }
76 #endif
77 
78   return 0;
79 }
80