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37 lines
834 B
C++
37 lines
834 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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// <atomic>
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// struct atomic_flag
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// atomic_flag() = default;
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#include <atomic>
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#include <new>
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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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std::atomic_flag f;
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f.clear();
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assert(f.test_and_set() == 0);
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{
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typedef std::atomic_flag A;
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TEST_ALIGNAS_TYPE(A) char storage[sizeof(A)] = {1};
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A& zero = *new (storage) A();
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assert(!zero.test_and_set());
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zero.~A();
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}
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}
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