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| 1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 the V8 project authors. All rights reserved. |
| 2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
| 3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
| 4 // met: | 4 // met: |
| 5 // | 5 // |
| 6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
| 7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
| 8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
| 9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
| 10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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| 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | 27 |
| 28 #ifndef V8_UTILS_RANDOM_NUMBER_GENERATOR_H_ | 28 #ifndef V8_UTILS_RANDOM_NUMBER_GENERATOR_H_ |
| 29 #define V8_UTILS_RANDOM_NUMBER_GENERATOR_H_ | 29 #define V8_UTILS_RANDOM_NUMBER_GENERATOR_H_ |
| 30 | 30 |
| 31 #include "globals.h" | 31 #include "base/globals.h" |
| 32 | 32 |
| 33 namespace v8 { | 33 namespace v8 { |
| 34 namespace internal { | 34 namespace internal { |
| 35 | 35 |
| 36 // ----------------------------------------------------------------------------- | 36 // ----------------------------------------------------------------------------- |
| 37 // RandomNumberGenerator | 37 // RandomNumberGenerator |
| 38 // | 38 // |
| 39 // This class is used to generate a stream of pseudorandom numbers. The class | 39 // This class is used to generate a stream of pseudorandom numbers. The class |
| 40 // uses a 48-bit seed, which is modified using a linear congruential formula. | 40 // uses a 48-bit seed, which is modified using a linear congruential formula. |
| 41 // (See Donald Knuth, The Art of Computer Programming, Volume 3, Section 3.2.1.) | 41 // (See Donald Knuth, The Art of Computer Programming, Volume 3, Section 3.2.1.) |
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| 101 | 101 |
| 102 int Next(int bits) V8_WARN_UNUSED_RESULT; | 102 int Next(int bits) V8_WARN_UNUSED_RESULT; |
| 103 void SetSeed(int64_t seed); | 103 void SetSeed(int64_t seed); |
| 104 | 104 |
| 105 int64_t seed_; | 105 int64_t seed_; |
| 106 }; | 106 }; |
| 107 | 107 |
| 108 } } // namespace v8::internal | 108 } } // namespace v8::internal |
| 109 | 109 |
| 110 #endif // V8_UTILS_RANDOM_NUMBER_GENERATOR_H_ | 110 #endif // V8_UTILS_RANDOM_NUMBER_GENERATOR_H_ |
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