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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef BASE_RAND_UTIL_H_ | 5 #ifndef BASE_RAND_UTIL_H_ |
6 #define BASE_RAND_UTIL_H_ | 6 #define BASE_RAND_UTIL_H_ |
7 #pragma once | 7 #pragma once |
8 | 8 |
9 #include <string> | |
10 | |
11 #include "base/basictypes.h" | 9 #include "base/basictypes.h" |
12 | 10 |
13 namespace base { | 11 namespace base { |
14 | 12 |
15 // Returns a random number in range [0, kuint64max]. Thread-safe. | 13 // Returns a random number in range [0, kuint64max]. Thread-safe. |
16 uint64 RandUint64(); | 14 uint64 RandUint64(); |
17 | 15 |
18 // Returns a random number between min and max (inclusive). Thread-safe. | 16 // Returns a random number between min and max (inclusive). Thread-safe. |
19 int RandInt(int min, int max); | 17 int RandInt(int min, int max); |
20 | 18 |
21 // Returns a random number in range [0, max). Thread-safe. | 19 // Returns a random number in range [0, max). Thread-safe. |
22 // | 20 // |
23 // Note that this can be used as an adapter for std::random_shuffle(): | 21 // Note that this can be used as an adapter for std::random_shuffle(): |
24 // Given a pre-populated |std::vector<int> myvector|, shuffle it as | 22 // Given a pre-populated |std::vector<int> myvector|, shuffle it as |
25 // std::random_shuffle(myvector.begin(), myvector.end(), base::RandGenerator); | 23 // std::random_shuffle(myvector.begin(), myvector.end(), base::RandGenerator); |
26 uint64 RandGenerator(uint64 max); | 24 uint64 RandGenerator(uint64 max); |
27 | 25 |
28 // Returns a random double in range [0, 1). Thread-safe. | 26 // Returns a random double in range [0, 1). Thread-safe. |
29 double RandDouble(); | 27 double RandDouble(); |
30 | 28 |
31 // Generate a 128-bit random GUID of the form: "%08X-%04X-%04X-%04X-%012llX". | |
32 std::string GenerateGUID(); | |
33 | |
34 } // namespace base | 29 } // namespace base |
35 | 30 |
36 #endif // BASE_RAND_UTIL_H_ | 31 #endif // BASE_RAND_UTIL_H_ |
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