llvm/llvm/include/llvm/Support/RandomNumberGenerator.h

//==- llvm/Support/RandomNumberGenerator.h - RNG for diversity ---*- 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
//
//===----------------------------------------------------------------------===//
//
// This file defines an abstraction for deterministic random number
// generation (RNG).  Note that the current implementation is not
// cryptographically secure as it uses the C++11 <random> facilities.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_SUPPORT_RANDOMNUMBERGENERATOR_H_
#define LLVM_SUPPORT_RANDOMNUMBERGENERATOR_H_

#include "llvm/Support/Compiler.h"
#include "llvm/Support/DataTypes.h" // Needed for uint64_t on Windows.
#include <random>
#include <system_error>

namespace llvm {
class StringRef;

/// A random number generator.
///
/// Instances of this class should not be shared across threads. The
/// seed should be set by passing the -rng-seed=<uint64> option. Use
/// Module::createRNG to create a new RNG instance for use with that
/// module.
class RandomNumberGenerator { … };

// Get random vector of specified size
std::error_code getRandomBytes(void *Buffer, size_t Size);
}

#endif