e78f53d1e8
This reverts commit 68c04b0ae62d8431d72d8b47fc13008002ee4387. This disables the IWYU mapping that caused the failure, since the headers aren't reachable for now. This is the first part of the "Freezing C++03 headers" proposal explained in https://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc/77319/58. This patch mechanically copies the headers as of the LLVM 19.1 release into a subdirectory of libc++ so that we can start using these headers when building in C++03 mode. We are going to be backporting important changes to that copy of the headers until the LLVM 21 release. After the LLVM 21 release, only critical bugfixes will be fixed in the C++03 copy of the headers. This patch only performs a copy of the headers -- these headers are still unused by the rest of the codebase.
82 lines
2.3 KiB
C++
82 lines
2.3 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef _LIBCPP___RANDOM_RANDOM_DEVICE_H
|
|
#define _LIBCPP___RANDOM_RANDOM_DEVICE_H
|
|
|
|
#include <__config>
|
|
#include <string>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
# pragma GCC system_header
|
|
#endif
|
|
|
|
_LIBCPP_PUSH_MACROS
|
|
#include <__undef_macros>
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_RANDOM_DEVICE)
|
|
|
|
class _LIBCPP_EXPORTED_FROM_ABI random_device {
|
|
# ifdef _LIBCPP_USING_DEV_RANDOM
|
|
int __f_;
|
|
# elif !defined(_LIBCPP_ABI_NO_RANDOM_DEVICE_COMPATIBILITY_LAYOUT)
|
|
_LIBCPP_DIAGNOSTIC_PUSH
|
|
_LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wunused-private-field")
|
|
|
|
// Apple platforms used to use the `_LIBCPP_USING_DEV_RANDOM` code path, and now
|
|
// use `arc4random()` as of this comment. In order to avoid breaking the ABI, we
|
|
// retain the same layout as before.
|
|
# if defined(__APPLE__)
|
|
int __padding_; // padding to fake the `__f_` field above
|
|
# endif
|
|
|
|
// ... vendors can add workarounds here if they switch to a different representation ...
|
|
|
|
_LIBCPP_DIAGNOSTIC_POP
|
|
# endif
|
|
|
|
public:
|
|
// types
|
|
typedef unsigned result_type;
|
|
|
|
// generator characteristics
|
|
static _LIBCPP_CONSTEXPR const result_type _Min = 0;
|
|
static _LIBCPP_CONSTEXPR const result_type _Max = 0xFFFFFFFFu;
|
|
|
|
_LIBCPP_HIDE_FROM_ABI static _LIBCPP_CONSTEXPR result_type min() { return _Min; }
|
|
_LIBCPP_HIDE_FROM_ABI static _LIBCPP_CONSTEXPR result_type max() { return _Max; }
|
|
|
|
// constructors
|
|
# ifndef _LIBCPP_CXX03_LANG
|
|
_LIBCPP_HIDE_FROM_ABI random_device() : random_device("/dev/urandom") {}
|
|
explicit random_device(const string& __token);
|
|
# else
|
|
explicit random_device(const string& __token = "/dev/urandom");
|
|
# endif
|
|
~random_device();
|
|
|
|
// generating functions
|
|
result_type operator()();
|
|
|
|
// property functions
|
|
double entropy() const _NOEXCEPT;
|
|
|
|
random_device(const random_device&) = delete;
|
|
void operator=(const random_device&) = delete;
|
|
};
|
|
|
|
#endif // !_LIBCPP_HAS_NO_RANDOM_DEVICE
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
_LIBCPP_POP_MACROS
|
|
|
|
#endif // _LIBCPP___RANDOM_RANDOM_DEVICE_H
|