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 // Copyright (c) 2008 The Chromium Authors. All rights reserved.

 // Use of this source code is governed by a BSD-style license that can be

 // found in the LICENSE file.

 #include "base/rand_util.h"

 #include <stdlib.h>

 #include "base/basictypes.h"

 #include "base/logging.h"

 namespace {

 uint32_t RandUint32() {

   uint32_t number;

   CHECK(rand_s(&number) == 0);

   return number;

 }

 }  // namespace

 namespace base {

 uint64_t RandUint64() {

   uint32_t first_half = RandUint32();

   uint32_t second_half = RandUint32();

   return (static_cast<uint64_t>(first_half) << 32) + second_half;

 }

 }  // namespace base