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//===----------------------------------------------------------------------===//
//
// 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>
// Test nested types
// template <class T>
// class atomic
// {
// public:
// typedef T value_type;
// };
#include <atomic>
#include <type_traits>
#include <thread>
#include <chrono>
#include "test_macros.h"
#if TEST_STD_VER >= 20
# include <memory>
#endif
template <class A, bool Integral>
struct test_atomic
{
test_atomic()
{
A a; (void)a;
#if TEST_STD_VER >= 17
static_assert((std::is_same_v<typename A::value_type, decltype(a.load())>), "");
#endif
}
};
template <class A>
struct test_atomic<A, true>
{
test_atomic()
{
A a; (void)a;
#if TEST_STD_VER >= 17
static_assert((std::is_same_v<typename A::value_type, decltype(a.load())>), "");
static_assert((std::is_same_v<typename A::value_type, typename A::difference_type>), "");
#endif
}
};
template <class A>
struct test_atomic<A*, false>
{
test_atomic()
{
A a; (void)a;
#if TEST_STD_VER >= 17
static_assert((std::is_same_v<typename A::value_type, decltype(a.load())>), "");
static_assert((std::is_same_v<typename A::difference_type, ptrdiff_t>), "");
#endif
}
};
template <class T>
void
test()
{
using A = std::atomic<T>;
#if TEST_STD_VER >= 17
static_assert((std::is_same_v<typename A::value_type, T>), "");
#endif
test_atomic<A, std::is_integral<T>::value && !std::is_same<T, bool>::value>();
}
struct TriviallyCopyable {
int i_;
};
struct WeirdTriviallyCopyable
{
char i, j, k; /* the 3 chars of doom */
};
struct PaddedTriviallyCopyable
{
char i; int j; /* probably lock-free? */
};
struct LargeTriviallyCopyable
{
int i, j[127]; /* decidedly not lock-free */
};
int main(int, char**)
{
test<bool> ();
test<char> ();
test<signed char> ();
test<unsigned char> ();
test<short> ();
test<unsigned short> ();
test<int> ();
test<unsigned int> ();
test<long> ();
test<unsigned long> ();
test<long long> ();
test<unsigned long long> ();
#if TEST_STD_VER > 17 && defined(__cpp_char8_t)
test<char8_t> ();
#endif
test<char16_t> ();
test<char32_t> ();
test<wchar_t> ();
test<int_least8_t> ();
test<uint_least8_t> ();
test<int_least16_t> ();
test<uint_least16_t> ();
test<int_least32_t> ();
test<uint_least32_t> ();
test<int_least64_t> ();
test<uint_least64_t> ();
test<int_fast8_t> ();
test<uint_fast8_t> ();
test<int_fast16_t> ();
test<uint_fast16_t> ();
test<int_fast32_t> ();
test<uint_fast32_t> ();
test<int_fast64_t> ();
test<uint_fast64_t> ();
test< int8_t> ();
test<uint8_t> ();
test< int16_t> ();
test<uint16_t> ();
test< int32_t> ();
test<uint32_t> ();
test< int64_t> ();
test<uint64_t> ();
test<intptr_t> ();
test<uintptr_t> ();
test<size_t> ();
test<ptrdiff_t> ();
test<intmax_t> ();
test<uintmax_t> ();
test<uintmax_t> ();
test<uintmax_t> ();
test<TriviallyCopyable>();
test<PaddedTriviallyCopyable>();
#ifndef __APPLE__ // Apple doesn't ship libatomic
/*
These aren't going to be lock-free,
so some libatomic.a is necessary.
*/
test<WeirdTriviallyCopyable>();
test<LargeTriviallyCopyable>();
#endif
test<std::thread::id>();
test<std::chrono::nanoseconds>();
test<float>();
#if TEST_STD_VER >= 20
test<std::atomic_signed_lock_free::value_type>();
test<std::atomic_unsigned_lock_free::value_type>();
/*
test<std::shared_ptr<int>>();
*/
#endif
return 0;
}
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