0eb8f018a1
Introduce CMake option `LIBCXX_HAS_C11_THREAD_API` that explicitly instructs libc++ to use C11 threads. Make sure `_LIBCPP_HAS_THREAD_API_C11` is defined properly in the `<__config_site>` and interacts correctly with platform-based auto-selection of thread API when it's not explicitly set.
613 lines
27 KiB
C++
613 lines
27 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___CONFIG
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#define _LIBCPP___CONFIG
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#include <__config_site>
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#ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
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# pragma GCC system_header
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#endif
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#ifdef __cplusplus
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# include <__configuration/abi.h>
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# include <__configuration/attributes.h>
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# include <__configuration/availability.h>
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# include <__configuration/compiler.h>
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# include <__configuration/experimental.h>
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# include <__configuration/hardening.h>
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# include <__configuration/language.h>
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# include <__configuration/platform.h>
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// The attributes supported by clang are documented at https://clang.llvm.org/docs/AttributeReference.html
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// _LIBCPP_VERSION represents the version of libc++, which matches the version of LLVM.
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// Given a LLVM release LLVM XX.YY.ZZ (e.g. LLVM 17.0.1 == 17.00.01), _LIBCPP_VERSION is
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// defined to XXYYZZ.
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# define _LIBCPP_VERSION 230000
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# define _LIBCPP_CONCAT_IMPL(_X, _Y) _X##_Y
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# define _LIBCPP_CONCAT(_X, _Y) _LIBCPP_CONCAT_IMPL(_X, _Y)
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# define _LIBCPP_CONCAT3(X, Y, Z) _LIBCPP_CONCAT(X, _LIBCPP_CONCAT(Y, Z))
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# define _LIBCPP_TOSTRING2(x) #x
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# define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x)
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# ifndef __has_constexpr_builtin
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# define __has_constexpr_builtin(x) 0
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# endif
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// This checks wheter a Clang module is built
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# ifndef __building_module
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# define __building_module(...) 0
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# endif
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// '__is_identifier' returns '0' if '__x' is a reserved identifier provided by
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// the compiler and '1' otherwise.
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# ifndef __is_identifier
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# define __is_identifier(__x) 1
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# endif
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# define __has_keyword(__x) !(__is_identifier(__x))
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# ifndef __has_warning
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# define __has_warning(...) 0
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# endif
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# if !defined(_LIBCPP_COMPILER_CLANG_BASED) && __cplusplus < 201103L
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# error "libc++ only supports C++03 with Clang-based compilers. Please enable C++11"
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# endif
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# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME)
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# define _LIBCPP_ABI_VCRUNTIME
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# endif
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# if defined(__MVS__)
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# include <features.h> // for __NATIVE_ASCII_F
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# endif
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# if defined(_WIN32)
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# define _LIBCPP_WIN32API
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# define _LIBCPP_SHORT_WCHAR 1
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// Both MinGW and native MSVC provide a "MSVC"-like environment
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# define _LIBCPP_MSVCRT_LIKE
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// If mingw not explicitly detected, assume using MS C runtime only if
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// a MS compatibility version is specified.
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# if defined(_MSC_VER) && !defined(__MINGW32__)
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# define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library
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# endif
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# if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__))
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# define _LIBCPP_HAS_BITSCAN64 1
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# else
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# define _LIBCPP_HAS_BITSCAN64 0
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# endif
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# define _LIBCPP_HAS_OPEN_WITH_WCHAR 1
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# else
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# define _LIBCPP_HAS_OPEN_WITH_WCHAR 0
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# define _LIBCPP_HAS_BITSCAN64 0
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# endif // defined(_WIN32)
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# if defined(_AIX) && !defined(__64BIT__)
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// The size of wchar is 2 byte on 32-bit mode on AIX.
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# define _LIBCPP_SHORT_WCHAR 1
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# endif
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// Libc++ supports various implementations of std::random_device.
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//
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// _LIBCPP_USING_DEV_RANDOM
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// Read entropy from the given file, by default `/dev/urandom`.
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// If a token is provided, it is assumed to be the path to a file
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// to read entropy from. This is the default behavior if nothing
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// else is specified. This implementation requires storing state
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// inside `std::random_device`.
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//
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// _LIBCPP_USING_ARC4_RANDOM
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// Use arc4random(). This allows obtaining random data even when
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// using sandboxing mechanisms. On some platforms like Apple, this
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// is the recommended source of entropy for user-space programs.
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// When this option is used, the token passed to `std::random_device`'s
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// constructor *must* be "/dev/urandom" -- anything else is an error.
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//
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// _LIBCPP_USING_GETENTROPY
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// Use getentropy().
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// When this option is used, the token passed to `std::random_device`'s
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// constructor *must* be "/dev/urandom" -- anything else is an error.
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//
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// _LIBCPP_USING_FUCHSIA_CPRNG
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// Use Fuchsia's zx_cprng_draw() system call, which is specified to
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// deliver high-quality entropy and cannot fail.
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// When this option is used, the token passed to `std::random_device`'s
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// constructor *must* be "/dev/urandom" -- anything else is an error.
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//
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// _LIBCPP_USING_WIN32_RANDOM
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// Use rand_s(), for use on Windows.
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// When this option is used, the token passed to `std::random_device`'s
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// constructor *must* be "/dev/urandom" -- anything else is an error.
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# if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \
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defined(__DragonFly__)
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# define _LIBCPP_USING_ARC4_RANDOM
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# elif defined(__wasi__) || defined(__EMSCRIPTEN__)
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# define _LIBCPP_USING_GETENTROPY
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# elif defined(__Fuchsia__)
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# define _LIBCPP_USING_FUCHSIA_CPRNG
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# elif defined(_LIBCPP_WIN32API)
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# define _LIBCPP_USING_WIN32_RANDOM
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# else
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# define _LIBCPP_USING_DEV_RANDOM
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# endif
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# ifndef _LIBCPP_CXX03_LANG
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# define _LIBCPP_ALIGNOF(...) alignof(__VA_ARGS__)
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# define _ALIGNAS_TYPE(x) alignas(x)
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# define _ALIGNAS(x) alignas(x)
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# define _NOEXCEPT noexcept
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# define _NOEXCEPT_(...) noexcept(__VA_ARGS__)
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# define _LIBCPP_CONSTEXPR constexpr
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# else
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# define _LIBCPP_ALIGNOF(...) _Alignof(__VA_ARGS__)
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# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x))))
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# define _ALIGNAS(x) __attribute__((__aligned__(x)))
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# define nullptr __nullptr
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# define _NOEXCEPT throw()
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# define _NOEXCEPT_(...)
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# define static_assert(...) _Static_assert(__VA_ARGS__)
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# define decltype(...) __decltype(__VA_ARGS__)
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# define _LIBCPP_CONSTEXPR
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typedef __char16_t char16_t;
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typedef __char32_t char32_t;
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# endif
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# define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp)
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# if __has_extension(blocks) && defined(__APPLE__)
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# define _LIBCPP_HAS_BLOCKS_RUNTIME 1
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# else
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# define _LIBCPP_HAS_BLOCKS_RUNTIME 0
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# endif
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# ifdef _LIBCPP_COMPILER_CLANG_BASED
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# define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("clang diagnostic push")
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# define _LIBCPP_DIAGNOSTIC_POP _Pragma("clang diagnostic pop")
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# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(clang diagnostic ignored str))
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# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str)
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# elif defined(_LIBCPP_COMPILER_GCC)
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# define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("GCC diagnostic push")
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# define _LIBCPP_DIAGNOSTIC_POP _Pragma("GCC diagnostic pop")
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# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str)
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# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(GCC diagnostic ignored str))
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# else
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# define _LIBCPP_DIAGNOSTIC_PUSH
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# define _LIBCPP_DIAGNOSTIC_POP
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# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str)
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# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str)
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# endif
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// Macros to enter and leave a state where deprecation warnings are suppressed.
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# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH \
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_LIBCPP_DIAGNOSTIC_PUSH _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wdeprecated") \
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_LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wdeprecated-declarations")
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# define _LIBCPP_SUPPRESS_DEPRECATED_POP _LIBCPP_DIAGNOSTIC_POP
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// Clang modules take a significant compile time hit when pushing and popping diagnostics.
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// Since all the headers are marked as system headers unless _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER is defined, we can
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// simply disable this pushing and popping when _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER isn't defined.
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# ifdef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
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# define _LIBCPP_PUSH_EXTENSION_DIAGNOSTICS \
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_LIBCPP_DIAGNOSTIC_PUSH \
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_LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++11-extensions") \
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_LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++14-extensions") \
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_LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++17-extensions") \
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_LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++20-extensions") \
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_LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++23-extensions") \
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_LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wc++14-extensions") \
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_LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wc++17-extensions") \
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_LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wc++20-extensions") \
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_LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wc++23-extensions")
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# define _LIBCPP_POP_EXTENSION_DIAGNOSTICS _LIBCPP_DIAGNOSTIC_POP
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# else
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# define _LIBCPP_PUSH_EXTENSION_DIAGNOSTICS
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# define _LIBCPP_POP_EXTENSION_DIAGNOSTICS
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# endif
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// clang-format off
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// The unversioned namespace is used when we want to be ABI compatible with other standard libraries in some way. There
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// are two main categories where that's the case:
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// - Historically, we have made exception types ABI compatible with libstdc++ to allow throwing them between libstdc++
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// and libc++. This is not used anymore for new exception types, since there is no use-case for it anymore.
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// - Types and functions which are used by the compiler are in the unversioned namespace, since the compiler has to know
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// their mangling without the appropriate declaration in some cases.
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// If it's not clear whether using the unversioned namespace is the correct thing to do, it's not. The versioned
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// namespace (_LIBCPP_BEGIN_NAMESPACE_STD) should almost always be used.
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# define _LIBCPP_BEGIN_UNVERSIONED_NAMESPACE_STD \
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_LIBCPP_PUSH_EXTENSION_DIAGNOSTICS namespace _LIBCPP_NAMESPACE_VISIBILITY std {
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# define _LIBCPP_END_UNVERSIONED_NAMESPACE_STD } _LIBCPP_POP_EXTENSION_DIAGNOSTICS
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# define _LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_BEGIN_UNVERSIONED_NAMESPACE_STD inline namespace _LIBCPP_ABI_NAMESPACE {
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# define _LIBCPP_END_NAMESPACE_STD } _LIBCPP_END_UNVERSIONED_NAMESPACE_STD
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// TODO: This should really be in the versioned namespace
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#define _LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL _LIBCPP_BEGIN_UNVERSIONED_NAMESPACE_STD namespace experimental {
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#define _LIBCPP_END_NAMESPACE_EXPERIMENTAL } _LIBCPP_END_UNVERSIONED_NAMESPACE_STD
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#define _LIBCPP_BEGIN_NAMESPACE_LFTS _LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL inline namespace fundamentals_v1 {
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#define _LIBCPP_END_NAMESPACE_LFTS } _LIBCPP_END_NAMESPACE_EXPERIMENTAL
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#define _LIBCPP_BEGIN_NAMESPACE_LFTS_V2 _LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL inline namespace fundamentals_v2 {
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#define _LIBCPP_END_NAMESPACE_LFTS_V2 } _LIBCPP_END_NAMESPACE_EXPERIMENTAL
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#ifdef _LIBCPP_ABI_NO_FILESYSTEM_INLINE_NAMESPACE
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# define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM _LIBCPP_BEGIN_NAMESPACE_STD namespace filesystem {
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# define _LIBCPP_END_NAMESPACE_FILESYSTEM } _LIBCPP_END_NAMESPACE_STD
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#else
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# define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM _LIBCPP_BEGIN_NAMESPACE_STD \
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inline namespace __fs { namespace filesystem {
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# define _LIBCPP_END_NAMESPACE_FILESYSTEM }} _LIBCPP_END_NAMESPACE_STD
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#endif
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// clang-format on
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# if !defined(__SIZEOF_INT128__) || defined(_MSC_VER)
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# define _LIBCPP_HAS_INT128 0
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# else
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# define _LIBCPP_HAS_INT128 1
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# endif
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# ifdef _LIBCPP_CXX03_LANG
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# define _LIBCPP_DECLARE_STRONG_ENUM(x) \
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struct _LIBCPP_EXPORTED_FROM_ABI x { \
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enum __lx
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// clang-format off
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# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \
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__lx __v_; \
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_LIBCPP_HIDE_FROM_ABI x(__lx __v) : __v_(__v) {} \
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_LIBCPP_HIDE_FROM_ABI explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \
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_LIBCPP_HIDE_FROM_ABI operator int() const { return __v_; } \
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};
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// clang-format on
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# else // _LIBCPP_CXX03_LANG
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# define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class x
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# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x)
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# endif // _LIBCPP_CXX03_LANG
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# ifdef __FreeBSD__
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# define _DECLARE_C99_LDBL_MATH 1
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# endif
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// If we are getting operator new from the MSVC CRT, then allocation overloads
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// for align_val_t were added in 19.12, aka VS 2017 version 15.3.
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# if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912
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# define _LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION 0
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# elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new)
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// We're deferring to Microsoft's STL to provide aligned new et al. We don't
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// have it unless the language feature test macro is defined.
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# define _LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION 0
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# elif defined(__MVS__)
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# define _LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION 0
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# else
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# define _LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION 1
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# endif
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# if !_LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION || (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606)
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# define _LIBCPP_HAS_ALIGNED_ALLOCATION 0
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# else
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# define _LIBCPP_HAS_ALIGNED_ALLOCATION 1
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# endif
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# if defined(__APPLE__) || defined(__FreeBSD__)
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# define _LIBCPP_WCTYPE_IS_MASK
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# endif
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// FIXME: using `#warning` causes diagnostics from system headers which include deprecated headers. This can only be
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// enabled again once https://github.com/llvm/llvm-project/pull/168041 (or a similar feature) has landed, since that
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// allows suppression in system headers.
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# if defined(__DEPRECATED) && __DEPRECATED && !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS) && 0
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# define _LIBCPP_DIAGNOSE_DEPRECATED_HEADERS 1
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# else
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# define _LIBCPP_DIAGNOSE_DEPRECATED_HEADERS 0
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# endif
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# if _LIBCPP_STD_VER <= 11
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# define _LIBCPP_EXPLICIT_SINCE_CXX14
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# else
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# define _LIBCPP_EXPLICIT_SINCE_CXX14 explicit
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# endif
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# if _LIBCPP_STD_VER >= 23
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# define _LIBCPP_EXPLICIT_SINCE_CXX23 explicit
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# else
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# define _LIBCPP_EXPLICIT_SINCE_CXX23
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# endif
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# if _LIBCPP_STD_VER >= 14
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# define _LIBCPP_CONSTEXPR_SINCE_CXX14 constexpr
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# else
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# define _LIBCPP_CONSTEXPR_SINCE_CXX14
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# endif
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# if _LIBCPP_STD_VER >= 17
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# define _LIBCPP_CONSTEXPR_SINCE_CXX17 constexpr
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# else
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# define _LIBCPP_CONSTEXPR_SINCE_CXX17
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# endif
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# if _LIBCPP_STD_VER >= 20
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# define _LIBCPP_CONSTEXPR_SINCE_CXX20 constexpr
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# else
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# define _LIBCPP_CONSTEXPR_SINCE_CXX20
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# endif
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# if _LIBCPP_STD_VER >= 23
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# define _LIBCPP_CONSTEXPR_SINCE_CXX23 constexpr
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# else
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# define _LIBCPP_CONSTEXPR_SINCE_CXX23
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# endif
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# if _LIBCPP_STD_VER >= 26
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# define _LIBCPP_CONSTEXPR_SINCE_CXX26 constexpr
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# else
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# define _LIBCPP_CONSTEXPR_SINCE_CXX26
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# endif
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// Thread API
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// clang-format off
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# if _LIBCPP_HAS_THREADS && \
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!_LIBCPP_HAS_THREAD_API_PTHREAD && \
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!_LIBCPP_HAS_THREAD_API_WIN32 && \
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!_LIBCPP_HAS_THREAD_API_EXTERNAL && \
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!_LIBCPP_HAS_THREAD_API_C11
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# if defined(__FreeBSD__) || \
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defined(__wasi__) || \
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defined(__NetBSD__) || \
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defined(__OpenBSD__) || \
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defined(__NuttX__) || \
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defined(__linux__) || \
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defined(__GNU__) || \
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defined(__APPLE__) || \
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defined(__MVS__) || \
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defined(_AIX) || \
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defined(__EMSCRIPTEN__)
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// clang-format on
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# undef _LIBCPP_HAS_THREAD_API_PTHREAD
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# define _LIBCPP_HAS_THREAD_API_PTHREAD 1
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# elif defined(__Fuchsia__)
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// TODO(44575): Switch to C11 thread API when possible.
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# undef _LIBCPP_HAS_THREAD_API_PTHREAD
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# define _LIBCPP_HAS_THREAD_API_PTHREAD 1
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# elif defined(_LIBCPP_WIN32API)
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# undef _LIBCPP_HAS_THREAD_API_WIN32
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# define _LIBCPP_HAS_THREAD_API_WIN32 1
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# else
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# error "No thread API"
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# endif // _LIBCPP_HAS_THREAD_API
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# endif // _LIBCPP_HAS_THREADS
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# if !_LIBCPP_HAS_THREAD_API_PTHREAD
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# define _LIBCPP_HAS_COND_CLOCKWAIT 0
|
|
# elif (defined(__ANDROID__) && __ANDROID_API__ >= 30) || _LIBCPP_GLIBC_PREREQ(2, 30)
|
|
# define _LIBCPP_HAS_COND_CLOCKWAIT 1
|
|
# else
|
|
# define _LIBCPP_HAS_COND_CLOCKWAIT 0
|
|
# endif
|
|
|
|
# if !_LIBCPP_HAS_THREADS && _LIBCPP_HAS_THREAD_API_PTHREAD
|
|
# error _LIBCPP_HAS_THREAD_API_PTHREAD may only be true when _LIBCPP_HAS_THREADS is true.
|
|
# endif
|
|
|
|
# if !_LIBCPP_HAS_THREADS && _LIBCPP_HAS_THREAD_API_EXTERNAL
|
|
# error _LIBCPP_HAS_THREAD_API_EXTERNAL may only be true when _LIBCPP_HAS_THREADS is true.
|
|
# endif
|
|
|
|
# if !_LIBCPP_HAS_THREADS && _LIBCPP_HAS_THREAD_API_C11
|
|
# error _LIBCPP_HAS_THREAD_API_C11 may only be true when _LIBCPP_HAS_THREADS is true.
|
|
# endif
|
|
|
|
# if !_LIBCPP_HAS_MONOTONIC_CLOCK && _LIBCPP_HAS_THREADS
|
|
# error _LIBCPP_HAS_MONOTONIC_CLOCK may only be false when _LIBCPP_HAS_THREADS is false.
|
|
# endif
|
|
|
|
# if _LIBCPP_HAS_THREADS && !defined(__STDCPP_THREADS__)
|
|
# define __STDCPP_THREADS__ 1
|
|
# endif
|
|
|
|
// The glibc and Bionic implementation of pthreads implements
|
|
// pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32
|
|
// mutexes have no destroy mechanism.
|
|
//
|
|
// This optimization can't be performed on Apple platforms, where
|
|
// pthread_mutex_destroy can allow the kernel to release resources.
|
|
// See https://llvm.org/D64298 for details.
|
|
//
|
|
// TODO(EricWF): Enable this optimization on Bionic after speaking to their
|
|
// respective stakeholders.
|
|
// clang-format off
|
|
# if (_LIBCPP_HAS_THREAD_API_PTHREAD && defined(__GLIBC__)) || \
|
|
(_LIBCPP_HAS_THREAD_API_C11 && defined(__Fuchsia__)) || \
|
|
_LIBCPP_HAS_THREAD_API_WIN32
|
|
// clang-format on
|
|
# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION 1
|
|
# else
|
|
# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION 0
|
|
# endif
|
|
|
|
// Destroying a condvar is a nop on Windows.
|
|
//
|
|
// This optimization can't be performed on Apple platforms, where
|
|
// pthread_cond_destroy can allow the kernel to release resources.
|
|
// See https://llvm.org/D64298 for details.
|
|
//
|
|
// TODO(EricWF): This is potentially true for some pthread implementations
|
|
// as well.
|
|
# if (_LIBCPP_HAS_THREAD_API_C11 && defined(__Fuchsia__)) || _LIBCPP_HAS_THREAD_API_WIN32
|
|
# define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION 1
|
|
# else
|
|
# define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION 0
|
|
# endif
|
|
|
|
# if defined(__BIONIC__) || defined(__NuttX__) || defined(__Fuchsia__) || defined(__wasi__) || \
|
|
_LIBCPP_HAS_MUSL_LIBC || defined(__OpenBSD__) || _LIBCPP_LIBC_LLVM_LIBC
|
|
# define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE
|
|
# endif
|
|
|
|
# if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic)
|
|
# define _LIBCPP_HAS_C_ATOMIC_IMP 1
|
|
# define _LIBCPP_HAS_GCC_ATOMIC_IMP 0
|
|
# define _LIBCPP_HAS_EXTERNAL_ATOMIC_IMP 0
|
|
# elif defined(_LIBCPP_COMPILER_GCC)
|
|
# define _LIBCPP_HAS_C_ATOMIC_IMP 0
|
|
# define _LIBCPP_HAS_GCC_ATOMIC_IMP 1
|
|
# define _LIBCPP_HAS_EXTERNAL_ATOMIC_IMP 0
|
|
# endif
|
|
|
|
# if !_LIBCPP_HAS_C_ATOMIC_IMP && !_LIBCPP_HAS_GCC_ATOMIC_IMP && !_LIBCPP_HAS_EXTERNAL_ATOMIC_IMP
|
|
# define _LIBCPP_HAS_ATOMIC_HEADER 0
|
|
# else
|
|
# define _LIBCPP_HAS_ATOMIC_HEADER 1
|
|
# ifndef _LIBCPP_ATOMIC_FLAG_TYPE
|
|
# define _LIBCPP_ATOMIC_FLAG_TYPE bool
|
|
# endif
|
|
# endif
|
|
|
|
// We often repeat things just for handling wide characters in the library.
|
|
// When wide characters are disabled, it can be useful to have a quick way of
|
|
// disabling it without having to resort to #if-#endif, which has a larger
|
|
// impact on readability.
|
|
# if !_LIBCPP_HAS_WIDE_CHARACTERS
|
|
# define _LIBCPP_IF_WIDE_CHARACTERS(...)
|
|
# else
|
|
# define _LIBCPP_IF_WIDE_CHARACTERS(...) __VA_ARGS__
|
|
# endif
|
|
|
|
// clang-format off
|
|
# define _LIBCPP_PUSH_MACROS _Pragma("push_macro(\"min\")") _Pragma("push_macro(\"max\")") _Pragma("push_macro(\"refresh\")") _Pragma("push_macro(\"move\")") _Pragma("push_macro(\"erase\")")
|
|
# define _LIBCPP_POP_MACROS _Pragma("pop_macro(\"min\")") _Pragma("pop_macro(\"max\")") _Pragma("pop_macro(\"refresh\")") _Pragma("pop_macro(\"move\")") _Pragma("pop_macro(\"erase\")")
|
|
// clang-format on
|
|
|
|
# ifndef _LIBCPP_NO_AUTO_LINK
|
|
# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY)
|
|
# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
|
|
# pragma comment(lib, "c++.lib")
|
|
# else
|
|
# pragma comment(lib, "libc++.lib")
|
|
# endif
|
|
# endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY)
|
|
# endif // _LIBCPP_NO_AUTO_LINK
|
|
|
|
// Configures the fopen close-on-exec mode character, if any. This string will
|
|
// be appended to any mode string used by fstream for fopen/fdopen.
|
|
//
|
|
// Not all platforms support this, but it helps avoid fd-leaks on platforms that
|
|
// do.
|
|
# if defined(__BIONIC__)
|
|
# define _LIBCPP_FOPEN_CLOEXEC_MODE "e"
|
|
# else
|
|
# define _LIBCPP_FOPEN_CLOEXEC_MODE
|
|
# endif
|
|
|
|
// c8rtomb() and mbrtoc8() were added in C++20 and C23. Support for these
|
|
// functions is gradually being added to existing C libraries. The conditions
|
|
// below check for known C library versions and conditions under which these
|
|
// functions are declared by the C library.
|
|
//
|
|
// GNU libc 2.36 and newer declare c8rtomb() and mbrtoc8() in C++ modes if
|
|
// __cpp_char8_t is defined or if C2X extensions are enabled. Determining
|
|
// the latter depends on internal GNU libc details that are not appropriate
|
|
// to depend on here, so any declarations present when __cpp_char8_t is not
|
|
// defined are ignored.
|
|
# if _LIBCPP_GLIBC_PREREQ(2, 36) && defined(__cpp_char8_t)
|
|
# define _LIBCPP_HAS_C8RTOMB_MBRTOC8 1
|
|
# else
|
|
# define _LIBCPP_HAS_C8RTOMB_MBRTOC8 0
|
|
# endif
|
|
|
|
// There are a handful of public standard library types that are intended to
|
|
// support CTAD but don't need any explicit deduction guides to do so. This
|
|
// macro is used to mark them as such, which suppresses the
|
|
// '-Wctad-maybe-unsupported' compiler warning when CTAD is used in user code
|
|
// with these classes.
|
|
# if _LIBCPP_STD_VER >= 17
|
|
# ifdef _LIBCPP_COMPILER_CLANG_BASED
|
|
# define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(_ClassName) \
|
|
template <class... _Tag> \
|
|
[[maybe_unused]] _ClassName(typename _Tag::__allow_ctad...)->_ClassName<_Tag...>
|
|
# else
|
|
# define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(ClassName) \
|
|
template <class... _Tag> \
|
|
ClassName(typename _Tag::__allow_ctad...)->ClassName<_Tag...>
|
|
# endif
|
|
# else
|
|
# define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(_ClassName) static_assert(true, "")
|
|
# endif
|
|
|
|
# if defined(__OBJC__) && defined(_LIBCPP_APPLE_CLANG_VER)
|
|
# define _LIBCPP_WORKAROUND_OBJCXX_COMPILER_INTRINSICS
|
|
# endif
|
|
|
|
# define _PSTL_PRAGMA(x) _Pragma(#x)
|
|
|
|
// Enable SIMD for compilers that support OpenMP 4.0
|
|
# if (defined(_OPENMP) && _OPENMP >= 201307)
|
|
|
|
# define _PSTL_UDR_PRESENT
|
|
# define _PSTL_PRAGMA_SIMD _PSTL_PRAGMA(omp simd)
|
|
# define _PSTL_PRAGMA_DECLARE_SIMD _PSTL_PRAGMA(omp declare simd)
|
|
# define _PSTL_PRAGMA_SIMD_REDUCTION(PRM) _PSTL_PRAGMA(omp simd reduction(PRM))
|
|
# define _PSTL_PRAGMA_SIMD_SCAN(PRM) _PSTL_PRAGMA(omp simd reduction(inscan, PRM))
|
|
# define _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN(PRM) _PSTL_PRAGMA(omp scan inclusive(PRM))
|
|
# define _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN(PRM) _PSTL_PRAGMA(omp scan exclusive(PRM))
|
|
|
|
// Declaration of reduction functor, where
|
|
// NAME - the name of the functor
|
|
// OP - type of the callable object with the reduction operation
|
|
// omp_in - refers to the local partial result
|
|
// omp_out - refers to the final value of the combiner operator
|
|
// omp_priv - refers to the private copy of the initial value
|
|
// omp_orig - refers to the original variable to be reduced
|
|
# define _PSTL_PRAGMA_DECLARE_REDUCTION(NAME, OP) \
|
|
_PSTL_PRAGMA(omp declare reduction(NAME:OP : omp_out(omp_in)) initializer(omp_priv = omp_orig))
|
|
|
|
# elif defined(_LIBCPP_COMPILER_CLANG_BASED)
|
|
|
|
# define _PSTL_PRAGMA_SIMD _Pragma("clang loop vectorize(enable) interleave(enable)")
|
|
# define _PSTL_PRAGMA_DECLARE_SIMD
|
|
# define _PSTL_PRAGMA_SIMD_REDUCTION(PRM) _Pragma("clang loop vectorize(enable) interleave(enable)")
|
|
# define _PSTL_PRAGMA_SIMD_SCAN(PRM) _Pragma("clang loop vectorize(enable) interleave(enable)")
|
|
# define _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN(PRM)
|
|
# define _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN(PRM)
|
|
# define _PSTL_PRAGMA_DECLARE_REDUCTION(NAME, OP)
|
|
|
|
# else // (defined(_OPENMP) && _OPENMP >= 201307)
|
|
|
|
# define _PSTL_PRAGMA_SIMD
|
|
# define _PSTL_PRAGMA_DECLARE_SIMD
|
|
# define _PSTL_PRAGMA_SIMD_REDUCTION(PRM)
|
|
# define _PSTL_PRAGMA_SIMD_SCAN(PRM)
|
|
# define _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN(PRM)
|
|
# define _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN(PRM)
|
|
# define _PSTL_PRAGMA_DECLARE_REDUCTION(NAME, OP)
|
|
|
|
# endif // (defined(_OPENMP) && _OPENMP >= 201307)
|
|
|
|
# define _PSTL_USE_NONTEMPORAL_STORES_IF_ALLOWED
|
|
|
|
#endif // __cplusplus
|
|
|
|
#endif // _LIBCPP___CONFIG
|