llvm-project/libcxx/test/atomics/atomics.flag/test_and_set.pass.cpp

109 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.
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: libcpp-has-no-threads
// <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);
}
}