8d86b2e686
If you're crazy enough to want this sort of thing, then add -D_LIBCPP_HAS_NO_THREADS to your CXXFLAGS and --param=additiona_features=libcpp-has-no-threads to your lit commnad line. http://reviews.llvm.org/D3969 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@217271 91177308-0d34-0410-b5e6-96231b3b80d8
61 lines
1.6 KiB
C++
61 lines
1.6 KiB
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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// void atomic_flag_clear_explicit(volatile atomic_flag*, memory_order);
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// void atomic_flag_clear_explicit(atomic_flag*, memory_order);
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#include <atomic>
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#include <cassert>
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int main()
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{
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{
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std::atomic_flag f;
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f.test_and_set();
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atomic_flag_clear_explicit(&f, std::memory_order_relaxed);
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assert(f.test_and_set() == 0);
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}
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{
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std::atomic_flag f;
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f.test_and_set();
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atomic_flag_clear_explicit(&f, std::memory_order_release);
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assert(f.test_and_set() == 0);
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}
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{
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std::atomic_flag f;
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f.test_and_set();
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atomic_flag_clear_explicit(&f, std::memory_order_seq_cst);
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assert(f.test_and_set() == 0);
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}
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{
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volatile std::atomic_flag f;
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f.test_and_set();
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atomic_flag_clear_explicit(&f, std::memory_order_relaxed);
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assert(f.test_and_set() == 0);
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}
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{
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volatile std::atomic_flag f;
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f.test_and_set();
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atomic_flag_clear_explicit(&f, std::memory_order_release);
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assert(f.test_and_set() == 0);
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}
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{
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volatile std::atomic_flag f;
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f.test_and_set();
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atomic_flag_clear_explicit(&f, std::memory_order_seq_cst);
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assert(f.test_and_set() == 0);
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}
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}
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