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 // <mutex>
13 
14 // class recursive_mutex;
15 
16 // typedef pthread_mutex_t* native_handle_type;
17 // native_handle_type native_handle();
18 
19 #include <mutex>
20 #include <cassert>
21 
main()22 int main()
23 {
24     std::recursive_mutex m;
25     pthread_mutex_t* h = m.native_handle();
26     assert(h);
27 }
28