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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <atomic>
// struct atomic_flag
// void clear(memory_order = memory_order_seq_cst);
// void clear(memory_order = memory_order_seq_cst) volatile;
#include <atomic>
#include <cassert>
int main()
{
{
std::atomic_flag f;
f.test_and_set();
f.clear();
assert(f.test_and_set() == 0);
}
{
std::atomic_flag f;
f.test_and_set();
f.clear(std::memory_order_relaxed);
assert(f.test_and_set() == 0);
}
{
std::atomic_flag f;
f.test_and_set();
f.clear(std::memory_order_release);
assert(f.test_and_set() == 0);
}
{
std::atomic_flag f;
f.test_and_set();
f.clear(std::memory_order_seq_cst);
assert(f.test_and_set() == 0);
}
{
volatile std::atomic_flag f;
f.test_and_set();
f.clear();
assert(f.test_and_set() == 0);
}
{
volatile std::atomic_flag f;
f.test_and_set();
f.clear(std::memory_order_relaxed);
assert(f.test_and_set() == 0);
}
{
volatile std::atomic_flag f;
f.test_and_set();
f.clear(std::memory_order_release);
assert(f.test_and_set() == 0);
}
{
volatile std::atomic_flag f;
f.test_and_set();
f.clear(std::memory_order_seq_cst);
assert(f.test_and_set() == 0);
}
}
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