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1//===-- Implementation header for rand utilities ----------------*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef LLVM_LIBC_SRC_STDLIB_RAND_UTIL_H10#define LLVM_LIBC_SRC_STDLIB_RAND_UTIL_H11 12#include "src/__support/CPP/atomic.h"13#include "src/__support/macros/attributes.h"14#include "src/__support/macros/config.h"15 16namespace LIBC_NAMESPACE_DECL {17 18// The ISO C standard does not explicitly require thread-safe behavior for the19// generic `rand()` function. Some implementations expect it however, so we20// provide it here.21extern cpp::Atomic<unsigned long> rand_next;22 23} // namespace LIBC_NAMESPACE_DECL24 25#endif // LLVM_LIBC_SRC_STDLIB_RAND_UTIL_H26