59 lines
1.6 KiB
C++
59 lines
1.6 KiB
C++
|
//===----------------------------------------------------------------------===//
|
||
|
|
//
|
||
|
|
// The LLVM Compiler Infrastructure
|
||
|
|
//
|
||
|
|
// This file is distributed under the University of Illinois Open Source
|
||
|
|
// License. See LICENSE.TXT for details.
|
||
|
|
//
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
|
||
|
|
// <atomic>
|
||
|
|
|
||
|
|
// struct atomic_flag
|
||
|
|
|
||
|
|
// void atomic_flag_clear_explicit(volatile atomic_flag*, memory_order);
|
||
|
|
// void atomic_flag_clear_explicit(atomic_flag*, memory_order);
|
||
|
|
|
||
|
|
#include <atomic>
|
||
|
|
#include <cassert>
|
||
|
|
|
||
|
|
int main()
|
||
|
|
{
|
||
|
|
{
|
||
|
|
std::atomic_flag f;
|
||
|
|
f.test_and_set();
|
||
|
|
atomic_flag_clear_explicit(&f, std::memory_order_relaxed);
|
||
|
|
assert(f.test_and_set() == 0);
|
||
|
|
}
|
||
|
|
{
|
||
|
|
std::atomic_flag f;
|
||
|
|
f.test_and_set();
|
||
|
|
atomic_flag_clear_explicit(&f, std::memory_order_release);
|
||
|
|
assert(f.test_and_set() == 0);
|
||
|
|
}
|
||
|
|
{
|
||
|
|
std::atomic_flag f;
|
||
|
|
f.test_and_set();
|
||
|
|
atomic_flag_clear_explicit(&f, std::memory_order_seq_cst);
|
||
|
|
assert(f.test_and_set() == 0);
|
||
|
|
}
|
||
|
|
{
|
||
|
|
volatile std::atomic_flag f;
|
||
|
|
f.test_and_set();
|
||
|
|
atomic_flag_clear_explicit(&f, std::memory_order_relaxed);
|
||
|
|
assert(f.test_and_set() == 0);
|
||
|
|
}
|
||
|
|
{
|
||
|
|
volatile std::atomic_flag f;
|
||
|
|
f.test_and_set();
|
||
|
|
atomic_flag_clear_explicit(&f, std::memory_order_release);
|
||
|
|
assert(f.test_and_set() == 0);
|
||
|
|
}
|
||
|
|
{
|
||
|
|
volatile std::atomic_flag f;
|
||
|
|
f.test_and_set();
|
||
|
|
atomic_flag_clear_explicit(&f, std::memory_order_seq_cst);
|
||
|
|
assert(f.test_and_set() == 0);
|
||
|
|
}
|
||
|
|
}
|