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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 |
9 #include "base/basictypes.h" | 11 #include "base/basictypes.h" |
10 | 12 |
11 namespace base { | 13 namespace base { |
12 | 14 |
13 // Returns a random number in range [0, kuint64max]. Thread-safe. | 15 // Returns a random number in range [0, kuint64max]. Thread-safe. |
14 uint64 RandUint64(); | 16 uint64 RandUint64(); |
15 | 17 |
16 // Returns a random number between min and max (inclusive). Thread-safe. | 18 // Returns a random number between min and max (inclusive). Thread-safe. |
17 int RandInt(int min, int max); | 19 int RandInt(int min, int max); |
18 | 20 |
19 // Returns a random number in range [0, max). Thread-safe. | 21 // Returns a random number in range [0, max). Thread-safe. |
20 // | 22 // |
21 // Note that this can be used as an adapter for std::random_shuffle(): | 23 // Note that this can be used as an adapter for std::random_shuffle(): |
22 // Given a pre-populated |std::vector<int> myvector|, shuffle it as | 24 // Given a pre-populated |std::vector<int> myvector|, shuffle it as |
23 // std::random_shuffle(myvector.begin(), myvector.end(), base::RandGenerator); | 25 // std::random_shuffle(myvector.begin(), myvector.end(), base::RandGenerator); |
24 uint64 RandGenerator(uint64 max); | 26 uint64 RandGenerator(uint64 max); |
25 | 27 |
26 // Returns a random double in range [0, 1). Thread-safe. | 28 // Returns a random double in range [0, 1). Thread-safe. |
27 double RandDouble(); | 29 double RandDouble(); |
28 | 30 |
| 31 // Generate a 128-bit random GUID of the form: "%08X-%04X-%04X-%04X-%012llX". |
| 32 std::string GenerateGUID(); |
| 33 |
29 } // namespace base | 34 } // namespace base |
30 | 35 |
31 #endif // BASE_RAND_UTIL_H_ | 36 #endif // BASE_RAND_UTIL_H_ |
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