107 lines
3.1 KiB
C++
107 lines
3.1 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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
|
|
|
|
// bool test_and_set(memory_order = memory_order_seq_cst);
|
|
// bool test_and_set(memory_order = memory_order_seq_cst) volatile;
|
|
|
|
#include <atomic>
|
|
#include <cassert>
|
|
|
|
int main()
|
|
{
|
|
{
|
|
std::atomic_flag f;
|
|
f.clear();
|
|
assert(f.test_and_set() == 0);
|
|
assert(f.test_and_set() == 1);
|
|
}
|
|
{
|
|
std::atomic_flag f;
|
|
f.clear();
|
|
assert(f.test_and_set(std::memory_order_relaxed) == 0);
|
|
assert(f.test_and_set(std::memory_order_relaxed) == 1);
|
|
}
|
|
{
|
|
std::atomic_flag f;
|
|
f.clear();
|
|
assert(f.test_and_set(std::memory_order_consume) == 0);
|
|
assert(f.test_and_set(std::memory_order_consume) == 1);
|
|
}
|
|
{
|
|
std::atomic_flag f;
|
|
f.clear();
|
|
assert(f.test_and_set(std::memory_order_acquire) == 0);
|
|
assert(f.test_and_set(std::memory_order_acquire) == 1);
|
|
}
|
|
{
|
|
std::atomic_flag f;
|
|
f.clear();
|
|
assert(f.test_and_set(std::memory_order_release) == 0);
|
|
assert(f.test_and_set(std::memory_order_release) == 1);
|
|
}
|
|
{
|
|
std::atomic_flag f;
|
|
f.clear();
|
|
assert(f.test_and_set(std::memory_order_acq_rel) == 0);
|
|
assert(f.test_and_set(std::memory_order_acq_rel) == 1);
|
|
}
|
|
{
|
|
std::atomic_flag f;
|
|
f.clear();
|
|
assert(f.test_and_set(std::memory_order_seq_cst) == 0);
|
|
assert(f.test_and_set(std::memory_order_seq_cst) == 1);
|
|
}
|
|
{
|
|
volatile std::atomic_flag f;
|
|
f.clear();
|
|
assert(f.test_and_set() == 0);
|
|
assert(f.test_and_set() == 1);
|
|
}
|
|
{
|
|
volatile std::atomic_flag f;
|
|
f.clear();
|
|
assert(f.test_and_set(std::memory_order_relaxed) == 0);
|
|
assert(f.test_and_set(std::memory_order_relaxed) == 1);
|
|
}
|
|
{
|
|
volatile std::atomic_flag f;
|
|
f.clear();
|
|
assert(f.test_and_set(std::memory_order_consume) == 0);
|
|
assert(f.test_and_set(std::memory_order_consume) == 1);
|
|
}
|
|
{
|
|
volatile std::atomic_flag f;
|
|
f.clear();
|
|
assert(f.test_and_set(std::memory_order_acquire) == 0);
|
|
assert(f.test_and_set(std::memory_order_acquire) == 1);
|
|
}
|
|
{
|
|
volatile std::atomic_flag f;
|
|
f.clear();
|
|
assert(f.test_and_set(std::memory_order_release) == 0);
|
|
assert(f.test_and_set(std::memory_order_release) == 1);
|
|
}
|
|
{
|
|
volatile std::atomic_flag f;
|
|
f.clear();
|
|
assert(f.test_and_set(std::memory_order_acq_rel) == 0);
|
|
assert(f.test_and_set(std::memory_order_acq_rel) == 1);
|
|
}
|
|
{
|
|
volatile std::atomic_flag f;
|
|
f.clear();
|
|
assert(f.test_and_set(std::memory_order_seq_cst) == 0);
|
|
assert(f.test_and_set(std::memory_order_seq_cst) == 1);
|
|
}
|
|
}
|