src/third_party/libc++/trunk/test/thread/thread.mutex/thread.lock/thread.lock.shared/thread.lock.shared.obs/owns_lock.pass.cpp

   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 // <shared_mutex>
  11
  12 // template <class Mutex> class shared_lock;
  13
  14 // bool owns_lock() const noexcept;
  15
  16 #include <shared_mutex>
  17 #include <cassert>
  18
  19 #if _LIBCPP_STD_VER > 11
  20
  21 std::shared_timed_mutex m;
  22
  23 #endif  // _LIBCPP_STD_VER > 11
  24
  25 int main()
  26 {
  27 #if _LIBCPP_STD_VER > 11
  28     std::shared_lock<std::shared_timed_mutex> lk0;
  29     assert(lk0.owns_lock() == false);
  30     std::shared_lock<std::shared_timed_mutex> lk1(m);
  31     assert(lk1.owns_lock() == true);
  32     lk1.unlock();
  33     assert(lk1.owns_lock() == false);
  34     static_assert(noexcept(lk0.owns_lock()), "owns_lock must be noexcept");
  35 #endif  // _LIBCPP_STD_VER > 11
  36 }