#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);
}
}