1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef _LIBCPP___ATOMIC_ALIASES_H 10 #define _LIBCPP___ATOMIC_ALIASES_H 11 12 #include <__atomic/atomic.h> 13 #include <__atomic/atomic_lock_free.h> 14 #include <__atomic/contention_t.h> 15 #include <__atomic/is_always_lock_free.h> 16 #include <__config> 17 #include <__type_traits/conditional.h> 18 #include <__type_traits/make_unsigned.h> 19 #include <cstddef> 20 #include <cstdint> 21 22 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 23 # pragma GCC system_header 24 #endif 25 26 _LIBCPP_BEGIN_NAMESPACE_STD 27 28 using atomic_bool = atomic<bool>; 29 using atomic_char = atomic<char>; 30 using atomic_schar = atomic<signed char>; 31 using atomic_uchar = atomic<unsigned char>; 32 using atomic_short = atomic<short>; 33 using atomic_ushort = atomic<unsigned short>; 34 using atomic_int = atomic<int>; 35 using atomic_uint = atomic<unsigned int>; 36 using atomic_long = atomic<long>; 37 using atomic_ulong = atomic<unsigned long>; 38 using atomic_llong = atomic<long long>; 39 using atomic_ullong = atomic<unsigned long long>; 40 #ifndef _LIBCPP_HAS_NO_CHAR8_T 41 using atomic_char8_t = atomic<char8_t>; 42 #endif 43 using atomic_char16_t = atomic<char16_t>; 44 using atomic_char32_t = atomic<char32_t>; 45 #ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 46 using atomic_wchar_t = atomic<wchar_t>; 47 #endif 48 49 using atomic_int_least8_t = atomic<int_least8_t>; 50 using atomic_uint_least8_t = atomic<uint_least8_t>; 51 using atomic_int_least16_t = atomic<int_least16_t>; 52 using atomic_uint_least16_t = atomic<uint_least16_t>; 53 using atomic_int_least32_t = atomic<int_least32_t>; 54 using atomic_uint_least32_t = atomic<uint_least32_t>; 55 using atomic_int_least64_t = atomic<int_least64_t>; 56 using atomic_uint_least64_t = atomic<uint_least64_t>; 57 58 using atomic_int_fast8_t = atomic<int_fast8_t>; 59 using atomic_uint_fast8_t = atomic<uint_fast8_t>; 60 using atomic_int_fast16_t = atomic<int_fast16_t>; 61 using atomic_uint_fast16_t = atomic<uint_fast16_t>; 62 using atomic_int_fast32_t = atomic<int_fast32_t>; 63 using atomic_uint_fast32_t = atomic<uint_fast32_t>; 64 using atomic_int_fast64_t = atomic<int_fast64_t>; 65 using atomic_uint_fast64_t = atomic<uint_fast64_t>; 66 67 using atomic_int8_t = atomic< int8_t>; 68 using atomic_uint8_t = atomic<uint8_t>; 69 using atomic_int16_t = atomic< int16_t>; 70 using atomic_uint16_t = atomic<uint16_t>; 71 using atomic_int32_t = atomic< int32_t>; 72 using atomic_uint32_t = atomic<uint32_t>; 73 using atomic_int64_t = atomic< int64_t>; 74 using atomic_uint64_t = atomic<uint64_t>; 75 76 using atomic_intptr_t = atomic<intptr_t>; 77 using atomic_uintptr_t = atomic<uintptr_t>; 78 using atomic_size_t = atomic<size_t>; 79 using atomic_ptrdiff_t = atomic<ptrdiff_t>; 80 using atomic_intmax_t = atomic<intmax_t>; 81 using atomic_uintmax_t = atomic<uintmax_t>; 82 83 // C++20 atomic_{signed,unsigned}_lock_free: prefer the contention type most highly, then the largest lock-free type 84 #if _LIBCPP_STD_VER >= 20 85 # if ATOMIC_LLONG_LOCK_FREE == 2 86 using __largest_lock_free_type = long long; 87 # elif ATOMIC_INT_LOCK_FREE == 2 88 using __largest_lock_free_type = int; 89 # elif ATOMIC_SHORT_LOCK_FREE == 2 90 using __largest_lock_free_type = short; 91 # elif ATOMIC_CHAR_LOCK_FREE == 2 92 using __largest_lock_free_type = char; 93 # else 94 # define _LIBCPP_NO_LOCK_FREE_TYPES // There are no lockfree types (this can happen on unusual platforms) 95 # endif 96 97 # ifndef _LIBCPP_NO_LOCK_FREE_TYPES 98 using __contention_t_or_largest = 99 __conditional_t<__libcpp_is_always_lock_free<__cxx_contention_t>::__value, 100 __cxx_contention_t, 101 __largest_lock_free_type>; 102 103 using atomic_signed_lock_free = atomic<__contention_t_or_largest>; 104 using atomic_unsigned_lock_free = atomic<make_unsigned_t<__contention_t_or_largest>>; 105 # endif // !_LIBCPP_NO_LOCK_FREE_TYPES 106 #endif // C++20 107 108 _LIBCPP_END_NAMESPACE_STD 109 110 #endif // _LIBCPP___ATOMIC_ALIASES_H 111