rand_util.h revision ddb351dbec246cf1fab5ec20d2d5520909041de1 
1// Copyright (c) 2011 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#ifndef BASE_RAND_UTIL_H_
6#define BASE_RAND_UTIL_H_
7#pragma once
8
9#include "base/base_api.h"
10#include "base/basictypes.h"
11
12namespace base {
13
14// Returns a random number in range [0, kuint64max]. Thread-safe.
15BASE_API uint64 RandUint64();
16
17// Returns a random number between min and max (inclusive). Thread-safe.
18BASE_API int RandInt(int min, int max);
19
20// Returns a random number in range [0, max).  Thread-safe.
21//
22// Note that this can be used as an adapter for std::random_shuffle():
23// Given a pre-populated |std::vector<int> myvector|, shuffle it as
24//   std::random_shuffle(myvector.begin(), myvector.end(), base::RandGenerator);
25BASE_API uint64 RandGenerator(uint64 max);
26
27// Returns a random double in range [0, 1). Thread-safe.
28BASE_API double RandDouble();
29
30}  // namespace base
31
32#endif  // BASE_RAND_UTIL_H_
33