| //===----------------------------------------------------------------------===// | 
 | // | 
 | //                     The LLVM Compiler Infrastructure | 
 | // | 
 | // This file is dual licensed under the MIT and the University of Illinois Open | 
 | // Source Licenses. See LICENSE.TXT for details. | 
 | // | 
 | //===----------------------------------------------------------------------===// | 
 |  | 
 | // <mutex> | 
 |  | 
 | // class mutex; | 
 |  | 
 | // typedef pthread_mutex_t* native_handle_type; | 
 | // native_handle_type native_handle(); | 
 |  | 
 | #include <mutex> | 
 | #include <cassert> | 
 |  | 
 | int main() | 
 | { | 
 |     std::mutex m; | 
 |     pthread_mutex_t* h = m.native_handle(); | 
 |     assert(h); | 
 | } |