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      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 
     12 namespace {
     13 
     14 uint32 RandUint32() {
     15   uint32 number;
     16   CHECK_EQ(rand_s(&number), 0);
     17   return number;
     18 }
     19 
     20 }  // namespace
     21 
     22 namespace base {
     23 
     24 uint64 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