200 lines
7.4 KiB
C++
200 lines
7.4 KiB
C++
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//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <atomic>
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// template <>
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// struct atomic<integral>
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// {
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// bool is_lock_free() const volatile;
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// bool is_lock_free() const;
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// void store(integral desr, memory_order m = memory_order_seq_cst) volatile;
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// void store(integral desr, memory_order m = memory_order_seq_cst);
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// integral load(memory_order m = memory_order_seq_cst) const volatile;
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// integral load(memory_order m = memory_order_seq_cst) const;
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// operator integral() const volatile;
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// operator integral() const;
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// integral exchange(integral desr,
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// memory_order m = memory_order_seq_cst) volatile;
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// integral exchange(integral desr, memory_order m = memory_order_seq_cst);
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// bool compare_exchange_weak(integral& expc, integral desr,
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// memory_order s, memory_order f) volatile;
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// bool compare_exchange_weak(integral& expc, integral desr,
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// memory_order s, memory_order f);
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// bool compare_exchange_strong(integral& expc, integral desr,
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// memory_order s, memory_order f) volatile;
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// bool compare_exchange_strong(integral& expc, integral desr,
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// memory_order s, memory_order f);
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// bool compare_exchange_weak(integral& expc, integral desr,
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// memory_order m = memory_order_seq_cst) volatile;
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// bool compare_exchange_weak(integral& expc, integral desr,
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// memory_order m = memory_order_seq_cst);
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// bool compare_exchange_strong(integral& expc, integral desr,
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// memory_order m = memory_order_seq_cst) volatile;
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// bool compare_exchange_strong(integral& expc, integral desr,
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// memory_order m = memory_order_seq_cst);
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//
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// integral
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// fetch_add(integral op, memory_order m = memory_order_seq_cst) volatile;
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// integral fetch_add(integral op, memory_order m = memory_order_seq_cst);
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// integral
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// fetch_sub(integral op, memory_order m = memory_order_seq_cst) volatile;
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// integral fetch_sub(integral op, memory_order m = memory_order_seq_cst);
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// integral
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// fetch_and(integral op, memory_order m = memory_order_seq_cst) volatile;
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// integral fetch_and(integral op, memory_order m = memory_order_seq_cst);
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// integral
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// fetch_or(integral op, memory_order m = memory_order_seq_cst) volatile;
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// integral fetch_or(integral op, memory_order m = memory_order_seq_cst);
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// integral
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// fetch_xor(integral op, memory_order m = memory_order_seq_cst) volatile;
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// integral fetch_xor(integral op, memory_order m = memory_order_seq_cst);
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//
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// atomic() = default;
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// constexpr atomic(integral desr);
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// atomic(const atomic&) = delete;
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// atomic& operator=(const atomic&) = delete;
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// atomic& operator=(const atomic&) volatile = delete;
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// integral operator=(integral desr) volatile;
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// integral operator=(integral desr);
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//
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// integral operator++(int) volatile;
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// integral operator++(int);
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// integral operator--(int) volatile;
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// integral operator--(int);
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// integral operator++() volatile;
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// integral operator++();
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// integral operator--() volatile;
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// integral operator--();
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// integral operator+=(integral op) volatile;
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// integral operator+=(integral op);
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// integral operator-=(integral op) volatile;
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// integral operator-=(integral op);
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// integral operator&=(integral op) volatile;
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// integral operator&=(integral op);
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// integral operator|=(integral op) volatile;
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// integral operator|=(integral op);
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// integral operator^=(integral op) volatile;
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// integral operator^=(integral op);
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// };
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#include <atomic>
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#include <new>
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#include <cassert>
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template <class A, class T>
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void
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do_test()
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{
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A obj(T(0));
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assert(obj == T(0));
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std::atomic_init(&obj, T(1));
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assert(obj == T(1));
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std::atomic_init(&obj, T(2));
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assert(obj == T(2));
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bool b0 = obj.is_lock_free();
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obj.store(T(0));
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assert(obj == T(0));
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obj.store(T(1), std::memory_order_release);
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assert(obj == T(1));
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assert(obj.load() == T(1));
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assert(obj.load(std::memory_order_acquire) == T(1));
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assert(obj.exchange(T(2)) == T(1));
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assert(obj == T(2));
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assert(obj.exchange(T(3), std::memory_order_relaxed) == T(2));
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assert(obj == T(3));
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T x = obj;
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assert(obj.compare_exchange_weak(x, T(2)) == true);
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assert(obj == T(2));
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assert(x == T(3));
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assert(obj.compare_exchange_weak(x, T(1)) == false);
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assert(obj == T(2));
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assert(x == T(2));
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x = T(2);
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assert(obj.compare_exchange_strong(x, T(1)) == true);
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assert(obj == T(1));
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assert(x == T(2));
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assert(obj.compare_exchange_strong(x, T(0)) == false);
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assert(obj == T(1));
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assert(x == T(1));
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assert((obj = T(0)) == T(0));
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assert(obj == T(0));
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assert(obj++ == T(0));
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assert(obj == T(1));
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assert(++obj == T(2));
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assert(obj == T(2));
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assert(--obj == T(1));
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assert(obj == T(1));
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assert(obj-- == T(1));
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assert(obj == T(0));
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obj = T(2);
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assert((obj += T(3)) == T(5));
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assert(obj == T(5));
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assert((obj -= T(3)) == T(2));
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assert(obj == T(2));
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assert((obj |= T(5)) == T(7));
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assert(obj == T(7));
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assert((obj &= T(0xF)) == T(7));
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assert(obj == T(7));
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assert((obj ^= T(0xF)) == T(8));
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assert(obj == T(8));
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{
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_ALIGNAS_TYPE(A) char storage[sizeof(A)] = {23};
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A& zero = *new (storage) A();
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assert(zero == 0);
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zero.~A();
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}
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}
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template <class A, class T>
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void test()
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{
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do_test<A, T>();
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do_test<volatile A, T>();
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}
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int main()
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{
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test<std::atomic_char, char>();
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test<std::atomic_schar, signed char>();
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test<std::atomic_uchar, unsigned char>();
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test<std::atomic_short, short>();
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test<std::atomic_ushort, unsigned short>();
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test<std::atomic_int, int>();
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test<std::atomic_uint, unsigned int>();
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test<std::atomic_long, long>();
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test<std::atomic_ulong, unsigned long>();
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test<std::atomic_llong, long long>();
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test<std::atomic_ullong, unsigned long long>();
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#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
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test<std::atomic_char16_t, char16_t>();
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test<std::atomic_char32_t, char32_t>();
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#endif // _LIBCPP_HAS_NO_UNICODE_CHARS
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test<std::atomic_wchar_t, wchar_t>();
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test<volatile std::atomic_char, char>();
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test<volatile std::atomic_schar, signed char>();
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test<volatile std::atomic_uchar, unsigned char>();
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test<volatile std::atomic_short, short>();
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test<volatile std::atomic_ushort, unsigned short>();
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test<volatile std::atomic_int, int>();
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test<volatile std::atomic_uint, unsigned int>();
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test<volatile std::atomic_long, long>();
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test<volatile std::atomic_ulong, unsigned long>();
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test<volatile std::atomic_llong, long long>();
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test<volatile std::atomic_ullong, unsigned long long>();
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#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
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test<volatile std::atomic_char16_t, char16_t>();
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test<volatile std::atomic_char32_t, char32_t>();
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#endif // _LIBCPP_HAS_NO_UNICODE_CHARS
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test<volatile std::atomic_wchar_t, wchar_t>();
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}
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