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ba87515fea
Currently, the library-internal feature test macros are only defined if the feature is not available, and always have the prefix `_LIBCPP_HAS_NO_`. This patch changes that, so that they are always defined and have the prefix `_LIBCPP_HAS_` instead. This changes the canonical use of these macros to `#if _LIBCPP_HAS_FEATURE`, which means that using an undefined macro (e.g. due to a missing include) is diagnosed now. While this is rather unlikely currently, a similar change in `<__configuration/availability.h>` caught a few bugs. This also improves readability, since it removes the double-negation of `#ifndef _LIBCPP_HAS_NO_FEATURE`. The current patch only touches the macros defined in `<__config>`. If people are happy with this approach, I'll make a follow-up PR to also change the macros defined in `<__config_site>`.
240 lines
10 KiB
C++
240 lines
10 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP_STDATOMIC_H
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#define _LIBCPP_STDATOMIC_H
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/*
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stdatomic.h synopsis
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template<class T>
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using std-atomic = std::atomic<T>; // exposition only
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#define _Atomic(T) std-atomic<T>
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#define ATOMIC_BOOL_LOCK_FREE see below
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#define ATOMIC_CHAR_LOCK_FREE see below
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#define ATOMIC_CHAR16_T_LOCK_FREE see below
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#define ATOMIC_CHAR32_T_LOCK_FREE see below
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#define ATOMIC_WCHAR_T_LOCK_FREE see below
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#define ATOMIC_SHORT_LOCK_FREE see below
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#define ATOMIC_INT_LOCK_FREE see below
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#define ATOMIC_LONG_LOCK_FREE see below
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#define ATOMIC_LLONG_LOCK_FREE see below
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#define ATOMIC_POINTER_LOCK_FREE see below
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using std::memory_order // see below
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using std::memory_order_relaxed // see below
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using std::memory_order_consume // see below
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using std::memory_order_acquire // see below
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using std::memory_order_release // see below
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using std::memory_order_acq_rel // see below
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using std::memory_order_seq_cst // see below
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using std::atomic_flag // see below
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using std::atomic_bool // see below
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using std::atomic_char // see below
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using std::atomic_schar // see below
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using std::atomic_uchar // see below
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using std::atomic_short // see below
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using std::atomic_ushort // see below
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using std::atomic_int // see below
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using std::atomic_uint // see below
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using std::atomic_long // see below
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using std::atomic_ulong // see below
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using std::atomic_llong // see below
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using std::atomic_ullong // see below
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using std::atomic_char8_t // see below
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using std::atomic_char16_t // see below
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using std::atomic_char32_t // see below
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using std::atomic_wchar_t // see below
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using std::atomic_int8_t // see below
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using std::atomic_uint8_t // see below
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using std::atomic_int16_t // see below
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using std::atomic_uint16_t // see below
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using std::atomic_int32_t // see below
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using std::atomic_uint32_t // see below
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using std::atomic_int64_t // see below
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using std::atomic_uint64_t // see below
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using std::atomic_int_least8_t // see below
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using std::atomic_uint_least8_t // see below
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using std::atomic_int_least16_t // see below
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using std::atomic_uint_least16_t // see below
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using std::atomic_int_least32_t // see below
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using std::atomic_uint_least32_t // see below
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using std::atomic_int_least64_t // see below
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using std::atomic_uint_least64_t // see below
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using std::atomic_int_fast8_t // see below
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using std::atomic_uint_fast8_t // see below
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using std::atomic_int_fast16_t // see below
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using std::atomic_uint_fast16_t // see below
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using std::atomic_int_fast32_t // see below
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using std::atomic_uint_fast32_t // see below
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using std::atomic_int_fast64_t // see below
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using std::atomic_uint_fast64_t // see below
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using std::atomic_intptr_t // see below
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using std::atomic_uintptr_t // see below
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using std::atomic_size_t // see below
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using std::atomic_ptrdiff_t // see below
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using std::atomic_intmax_t // see below
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using std::atomic_uintmax_t // see below
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using std::atomic_is_lock_free // see below
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using std::atomic_load // see below
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using std::atomic_load_explicit // see below
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using std::atomic_store // see below
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using std::atomic_store_explicit // see below
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using std::atomic_exchange // see below
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using std::atomic_exchange_explicit // see below
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using std::atomic_compare_exchange_strong // see below
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using std::atomic_compare_exchange_strong_explicit // see below
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using std::atomic_compare_exchange_weak // see below
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using std::atomic_compare_exchange_weak_explicit // see below
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using std::atomic_fetch_add // see below
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using std::atomic_fetch_add_explicit // see below
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using std::atomic_fetch_sub // see below
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using std::atomic_fetch_sub_explicit // see below
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using std::atomic_fetch_or // see below
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using std::atomic_fetch_or_explicit // see below
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using std::atomic_fetch_xor // see below
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using std::atomic_fetch_xor_explicit // see below
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using std::atomic_fetch_and // see below
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using std::atomic_fetch_and_explicit // see below
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using std::atomic_flag_test_and_set // see below
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using std::atomic_flag_test_and_set_explicit // see below
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using std::atomic_flag_clear // see below
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using std::atomic_flag_clear_explicit // see below
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using std::atomic_thread_fence // see below
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using std::atomic_signal_fence // see below
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*/
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#include <__config>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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#if defined(__cplusplus)
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# include <atomic>
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# include <version>
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# ifdef _Atomic
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# undef _Atomic
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# endif
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# define _Atomic(_Tp) ::std::atomic<_Tp>
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using std::memory_order _LIBCPP_USING_IF_EXISTS;
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using std::memory_order_relaxed _LIBCPP_USING_IF_EXISTS;
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using std::memory_order_consume _LIBCPP_USING_IF_EXISTS;
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using std::memory_order_acquire _LIBCPP_USING_IF_EXISTS;
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using std::memory_order_release _LIBCPP_USING_IF_EXISTS;
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using std::memory_order_acq_rel _LIBCPP_USING_IF_EXISTS;
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using std::memory_order_seq_cst _LIBCPP_USING_IF_EXISTS;
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using std::atomic_flag _LIBCPP_USING_IF_EXISTS;
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using std::atomic_bool _LIBCPP_USING_IF_EXISTS;
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using std::atomic_char _LIBCPP_USING_IF_EXISTS;
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using std::atomic_schar _LIBCPP_USING_IF_EXISTS;
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using std::atomic_uchar _LIBCPP_USING_IF_EXISTS;
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using std::atomic_short _LIBCPP_USING_IF_EXISTS;
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using std::atomic_ushort _LIBCPP_USING_IF_EXISTS;
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using std::atomic_int _LIBCPP_USING_IF_EXISTS;
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using std::atomic_uint _LIBCPP_USING_IF_EXISTS;
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using std::atomic_long _LIBCPP_USING_IF_EXISTS;
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using std::atomic_ulong _LIBCPP_USING_IF_EXISTS;
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using std::atomic_llong _LIBCPP_USING_IF_EXISTS;
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using std::atomic_ullong _LIBCPP_USING_IF_EXISTS;
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# if _LIBCPP_HAS_CHAR8_T
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using std::atomic_char8_t _LIBCPP_USING_IF_EXISTS;
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# endif
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using std::atomic_char16_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_char32_t _LIBCPP_USING_IF_EXISTS;
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# ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
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using std::atomic_wchar_t _LIBCPP_USING_IF_EXISTS;
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# endif
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using std::atomic_int8_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_uint8_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_int16_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_uint16_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_int32_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_uint32_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_int64_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_uint64_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_int_least8_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_uint_least8_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_int_least16_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_uint_least16_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_int_least32_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_uint_least32_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_int_least64_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_uint_least64_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_int_fast8_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_uint_fast8_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_int_fast16_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_uint_fast16_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_int_fast32_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_uint_fast32_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_int_fast64_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_uint_fast64_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_intptr_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_uintptr_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_size_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_ptrdiff_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_intmax_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_uintmax_t _LIBCPP_USING_IF_EXISTS;
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using std::atomic_compare_exchange_strong _LIBCPP_USING_IF_EXISTS;
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using std::atomic_compare_exchange_strong_explicit _LIBCPP_USING_IF_EXISTS;
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using std::atomic_compare_exchange_weak _LIBCPP_USING_IF_EXISTS;
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using std::atomic_compare_exchange_weak_explicit _LIBCPP_USING_IF_EXISTS;
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using std::atomic_exchange _LIBCPP_USING_IF_EXISTS;
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using std::atomic_exchange_explicit _LIBCPP_USING_IF_EXISTS;
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using std::atomic_fetch_add _LIBCPP_USING_IF_EXISTS;
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using std::atomic_fetch_add_explicit _LIBCPP_USING_IF_EXISTS;
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using std::atomic_fetch_and _LIBCPP_USING_IF_EXISTS;
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using std::atomic_fetch_and_explicit _LIBCPP_USING_IF_EXISTS;
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using std::atomic_fetch_or _LIBCPP_USING_IF_EXISTS;
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using std::atomic_fetch_xor_explicit _LIBCPP_USING_IF_EXISTS;
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using std::atomic_fetch_xor _LIBCPP_USING_IF_EXISTS;
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using std::atomic_fetch_or_explicit _LIBCPP_USING_IF_EXISTS;
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using std::atomic_fetch_sub _LIBCPP_USING_IF_EXISTS;
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using std::atomic_fetch_sub_explicit _LIBCPP_USING_IF_EXISTS;
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using std::atomic_flag_clear _LIBCPP_USING_IF_EXISTS;
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using std::atomic_flag_clear_explicit _LIBCPP_USING_IF_EXISTS;
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using std::atomic_flag_test_and_set _LIBCPP_USING_IF_EXISTS;
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using std::atomic_flag_test_and_set_explicit _LIBCPP_USING_IF_EXISTS;
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using std::atomic_is_lock_free _LIBCPP_USING_IF_EXISTS;
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using std::atomic_load _LIBCPP_USING_IF_EXISTS;
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using std::atomic_load_explicit _LIBCPP_USING_IF_EXISTS;
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using std::atomic_store _LIBCPP_USING_IF_EXISTS;
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using std::atomic_store_explicit _LIBCPP_USING_IF_EXISTS;
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using std::atomic_signal_fence _LIBCPP_USING_IF_EXISTS;
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using std::atomic_thread_fence _LIBCPP_USING_IF_EXISTS;
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#else
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# if __has_include_next(<stdatomic.h>)
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# include_next <stdatomic.h>
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# endif
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#endif // defined(__cplusplus)
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#endif // _LIBCPP_STDATOMIC_H
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