1 files changed, 81 insertions, 0 deletions
diff --git a/contrib/llvm-project/libcxx/include/__random/random_device.h b/contrib/llvm-project/libcxx/include/__random/random_device.h
new file mode 100644
index 000000000000..52407943d2ec
--- /dev/null
+++ b/contrib/llvm-project/libcxx/include/__random/random_device.h
@@ -0,0 +1,81 @@
+//===----------------------------------------------------------------------===//
+//
+// 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