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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #ifndef VM_RANDOM_H_ | 5 #ifndef VM_ATOMIC_H_ |
6 #define VM_RANDOM_H_ | 6 #define VM_ATOMIC_H_ |
7 | 7 |
8 #include "vm/globals.h" | |
9 #include "vm/allocation.h" | 8 #include "vm/allocation.h" |
10 | 9 |
11 namespace dart { | 10 namespace dart { |
12 | 11 |
13 class Random : public ValueObject { | 12 class AtomicOperations : public AllStatic { |
14 public: | 13 public: |
15 Random(); | 14 // Atomically fetch the value at p and increment the value at p. |
16 ~Random(); | 15 // Returns the original value at p. |
| 16 static uintptr_t FetchAndIncrement(uintptr_t* p); |
| 17 }; |
17 | 18 |
18 uint32_t NextUInt32(); | |
19 | |
20 private: | |
21 void NextState(); | |
22 | |
23 uint64_t _state; | |
24 | |
25 DISALLOW_ALLOCATION(); | |
26 DISALLOW_COPY_AND_ASSIGN(Random); | |
27 }; | |
28 | 19 |
29 } // namespace dart | 20 } // namespace dart |
30 | 21 |
31 #endif // VM_RANDOM_H_ | 22 #endif // VM_ATOMIC_H_ |
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