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907c1196a7
Libc++ is used as a system library on macOS and iOS (amongst others). In order for users to be able to compile a binary that is intended to be deployed to an older version of the platform, clang provides the availability attribute <https://clang.llvm.org/docs/AttributeReference.html#availability>_ that can be placed on declarations to describe the lifecycle of a symbol in the library. See docs/DesignDocs/AvailabilityMarkup.rst for more information. Differential Revision: https://reviews.llvm.org/D31739 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@302172 91177308-0d34-0410-b5e6-96231b3b80d8
42 lines
994 B
C++
42 lines
994 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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//
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// UNSUPPORTED: libcpp-has-no-threads
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//
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// This test uses new symbols that were not defined in the libc++ shipped on
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// darwin11 and darwin12:
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// XFAIL: availability=macosx10.7
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// XFAIL: availability=macosx10.8
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// <memory>
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// shared_ptr
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// template <class T>
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// shared_ptr<T>
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// atomic_exchange(shared_ptr<T>* p, shared_ptr<T> r)
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// UNSUPPORTED: c++98, c++03
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#include <memory>
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#include <cassert>
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#include "test_macros.h"
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int main()
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{
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{
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std::shared_ptr<int> p(new int(4));
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std::shared_ptr<int> r(new int(3));
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r = std::atomic_exchange(&p, r);
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assert(*p == 3);
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assert(*r == 4);
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}
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}
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