src/third_party/libc++/trunk/test/thread/thread.mutex/thread.lock/thread.lock.shared/thread.lock.shared.cons/move_assign.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 // shared_lock& operator=(shared_lock&& u);
  15
  16 #include <shared_mutex>
  17 #include <cassert>
  18
  19 #if _LIBCPP_STD_VER > 11
  20
  21 std::shared_mutex m0;
  22 std::shared_mutex m1;
  23
  24 #endif  // _LIBCPP_STD_VER > 11
  25
  26 int main()
  27 {
  28 #if _LIBCPP_STD_VER > 11
  29     std::shared_lock<std::shared_mutex> lk0(m0);
  30     std::shared_lock<std::shared_mutex> lk1(m1);
  31     lk1 = std::move(lk0);
  32     assert(lk1.mutex() == &m0);
  33     assert(lk1.owns_lock() == true);
  34     assert(lk0.mutex() == nullptr);
  35     assert(lk0.owns_lock() == false);
  36 #endif  // _LIBCPP_STD_VER > 11
  37 }