ba898e4208
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@191127 91177308-0d34-0410-b5e6-96231b3b80d8
37 lines
938 B
C++
37 lines
938 B
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <shared_mutex>
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// template <class Mutex> class shared_lock;
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// mutex_type *mutex() const noexcept;
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#include <shared_mutex>
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#include <cassert>
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#if _LIBCPP_STD_VER > 11
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std::shared_mutex m;
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#endif // _LIBCPP_STD_VER > 11
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int main()
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{
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#if _LIBCPP_STD_VER > 11
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std::shared_lock<std::shared_mutex> lk0;
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assert(lk0.mutex() == nullptr);
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std::shared_lock<std::shared_mutex> lk1(m);
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assert(lk1.mutex() == &m);
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lk1.unlock();
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assert(lk1.mutex() == &m);
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static_assert(noexcept(lk0.mutex()), "mutex() must be noexcept");
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#endif // _LIBCPP_STD_VER > 11
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}
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