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Side by Side Diff: src/utils/random-number-generator.h

Issue 23494047: Deuglify V8_INLINE and V8_NOINLINE. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 7 years, 3 months ago
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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
(...skipping 41 matching lines...) Expand 10 before | Expand all | Expand 10 after
52 static void SetEntropySource(EntropySource entropy_source); 52 static void SetEntropySource(EntropySource entropy_source);
53 53
54 RandomNumberGenerator(); 54 RandomNumberGenerator();
55 explicit RandomNumberGenerator(int64_t seed) { SetSeed(seed); } 55 explicit RandomNumberGenerator(int64_t seed) { SetSeed(seed); }
56 56
57 // Returns the next pseudorandom, uniformly distributed int value from this 57 // Returns the next pseudorandom, uniformly distributed int value from this
58 // random number generator's sequence. The general contract of |NextInt()| is 58 // random number generator's sequence. The general contract of |NextInt()| is
59 // that one int value is pseudorandomly generated and returned. 59 // that one int value is pseudorandomly generated and returned.
60 // All 2^32 possible integer values are produced with (approximately) equal 60 // All 2^32 possible integer values are produced with (approximately) equal
61 // probability. 61 // probability.
62 V8_INLINE(int NextInt()) V8_WARN_UNUSED_RESULT { 62 V8_INLINE int NextInt() V8_WARN_UNUSED_RESULT {
63 return Next(32); 63 return Next(32);
64 } 64 }
65 65
66 // Returns a pseudorandom, uniformly distributed int value between 0 66 // Returns a pseudorandom, uniformly distributed int value between 0
67 // (inclusive) and the specified max value (exclusive), drawn from this random 67 // (inclusive) and the specified max value (exclusive), drawn from this random
68 // number generator's sequence. The general contract of |NextInt(int)| is that 68 // number generator's sequence. The general contract of |NextInt(int)| is that
69 // one int value in the specified range is pseudorandomly generated and 69 // one int value in the specified range is pseudorandomly generated and
70 // returned. All max possible int values are produced with (approximately) 70 // returned. All max possible int values are produced with (approximately)
71 // equal probability. 71 // equal probability.
72 int NextInt(int max) V8_WARN_UNUSED_RESULT; 72 int NextInt(int max) V8_WARN_UNUSED_RESULT;
73 73
74 // Returns the next pseudorandom, uniformly distributed boolean value from 74 // Returns the next pseudorandom, uniformly distributed boolean value from
75 // this random number generator's sequence. The general contract of 75 // this random number generator's sequence. The general contract of
76 // |NextBoolean()| is that one boolean value is pseudorandomly generated and 76 // |NextBoolean()| is that one boolean value is pseudorandomly generated and
77 // returned. The values true and false are produced with (approximately) equal 77 // returned. The values true and false are produced with (approximately) equal
78 // probability. 78 // probability.
79 V8_INLINE(bool NextBool()) V8_WARN_UNUSED_RESULT { 79 V8_INLINE bool NextBool() V8_WARN_UNUSED_RESULT {
80 return Next(1) != 0; 80 return Next(1) != 0;
81 } 81 }
82 82
83 // Returns the next pseudorandom, uniformly distributed double value between 83 // Returns the next pseudorandom, uniformly distributed double value between
84 // 0.0 and 1.0 from this random number generator's sequence. 84 // 0.0 and 1.0 from this random number generator's sequence.
85 // The general contract of |NextDouble()| is that one double value, chosen 85 // The general contract of |NextDouble()| is that one double value, chosen
86 // (approximately) uniformly from the range 0.0 (inclusive) to 1.0 86 // (approximately) uniformly from the range 0.0 (inclusive) to 1.0
87 // (exclusive), is pseudorandomly generated and returned. 87 // (exclusive), is pseudorandomly generated and returned.
88 double NextDouble() V8_WARN_UNUSED_RESULT; 88 double NextDouble() V8_WARN_UNUSED_RESULT;
89 89
90 // Fills the elements of a specified array of bytes with random numbers. 90 // Fills the elements of a specified array of bytes with random numbers.
91 void NextBytes(void* buffer, size_t buflen); 91 void NextBytes(void* buffer, size_t buflen);
92 92
93 private: 93 private:
94 static const int64_t kMultiplier = V8_2PART_UINT64_C(0x5, deece66d); 94 static const int64_t kMultiplier = V8_2PART_UINT64_C(0x5, deece66d);
95 static const int64_t kAddend = 0xb; 95 static const int64_t kAddend = 0xb;
96 static const int64_t kMask = V8_2PART_UINT64_C(0xffff, ffffffff); 96 static const int64_t kMask = V8_2PART_UINT64_C(0xffff, ffffffff);
97 97
98 int Next(int bits) V8_WARN_UNUSED_RESULT; 98 int Next(int bits) V8_WARN_UNUSED_RESULT;
99 void SetSeed(int64_t seed); 99 void SetSeed(int64_t seed);
100 100
101 int64_t seed_; 101 int64_t seed_;
102 }; 102 };
103 103
104 } } // namespace v8::internal 104 } } // namespace v8::internal
105 105
106 #endif // V8_UTILS_RANDOM_NUMBER_GENERATOR_H_ 106 #endif // V8_UTILS_RANDOM_NUMBER_GENERATOR_H_
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