1// Copyright (c) 2008 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "base/rand_util.h"
6
7#include <stdlib.h>
8
9#include "base/basictypes.h"
10#include "base/logging.h"
11
12namespace {
13
14uint32 RandUint32() {
15  uint32 number;
16  CHECK_EQ(rand_s(&number), 0);
17  return number;
18}
19
20}  // namespace
21
22namespace base {
23
24uint64 RandUint64() {
25  uint32 first_half = RandUint32();
26  uint32 second_half = RandUint32();
27  return (static_cast<uint64>(first_half) << 32) + second_half;
28}
29
30}  // namespace base
31