llvm-project/libcxx/test/std/atomics/atomics.flag/atomic_flag_test.pass.cpp
Louis Dionne 6f6175d1c6 [libc++][NFC] Fix copy-paste errors in tests
The test precision_type.pass.cpp was a duplicate of precision.pass.cpp,
so it is removed. atomic_flag_test.pass.cpp was a duplicate of
atomic_flag_test_and_set.pass.cpp, so instead I wrote a proper
test for it. Those duplicate tests were detected with

     find libcxx ! -empty -type f -exec md5sum {} + | sort | uniq -w32 -dD
2021-08-18 08:54:18 -04:00

42 lines
1.0 KiB
C++

//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: libcpp-has-no-threads
// <atomic>
// struct atomic_flag
// bool atomic_flag_test(const volatile atomic_flag*);
// bool atomic_flag_test(const atomic_flag*);
#include <atomic>
#include <cassert>
#include "test_macros.h"
int main(int, char**)
{
{
std::atomic_flag f;
f.clear();
assert(atomic_flag_test(&f) == 0);
assert(f.test_and_set() == 0);
assert(atomic_flag_test(&f) == 1);
}
{
volatile std::atomic_flag f;
f.clear();
assert(atomic_flag_test(&f) == 0);
assert(f.test_and_set() == 0);
assert(atomic_flag_test(&f) == 1);
}
return 0;
}