michael@0: // Copyright (c) 2008 The Chromium Authors. All rights reserved.
michael@0: // Use of this source code is governed by a BSD-style license that can be
michael@0: // found in the LICENSE file.
michael@0: 
michael@0: #include "base/rand_util.h"
michael@0: 
michael@0: #include <stdlib.h>
michael@0: 
michael@0: #include "base/basictypes.h"
michael@0: #include "base/logging.h"
michael@0: 
michael@0: namespace {
michael@0: 
michael@0: uint32_t RandUint32() {
michael@0:   uint32_t number;
michael@0:   CHECK(rand_s(&number) == 0);
michael@0:   return number;
michael@0: }
michael@0: 
michael@0: }  // namespace
michael@0: 
michael@0: namespace base {
michael@0: 
michael@0: uint64_t RandUint64() {
michael@0:   uint32_t first_half = RandUint32();
michael@0:   uint32_t second_half = RandUint32();
michael@0:   return (static_cast<uint64_t>(first_half) << 32) + second_half;
michael@0: }
michael@0: 
michael@0: }  // namespace base