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 12 namespace base { 13 14 // Returns a random number in range [0, kuint64max]. Thread-safe. 15 BASE_API uint64 RandUint64(); 16 17 // Returns a random number between min and max (inclusive). Thread-safe. 18 BASE_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); 25 BASE_API uint64 RandGenerator(uint64 max); 26 27 // Returns a random double in range [0, 1). Thread-safe. 28 BASE_API double RandDouble(); 29 30 } // namespace base 31 32 #endif // BASE_RAND_UTIL_H_ 33