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1 // Copyright 2010 the V8 project authors. All rights reserved. | 1 // Copyright 2010 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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31 #include "circular-queue.h" | 31 #include "circular-queue.h" |
32 | 32 |
33 namespace v8 { | 33 namespace v8 { |
34 namespace internal { | 34 namespace internal { |
35 | 35 |
36 | 36 |
37 template<typename Record> | 37 template<typename Record> |
38 CircularQueue<Record>::CircularQueue(int desired_buffer_size_in_bytes) | 38 CircularQueue<Record>::CircularQueue(int desired_buffer_size_in_bytes) |
39 : buffer_(NewArray<Record>(desired_buffer_size_in_bytes / sizeof(Record))), | 39 : buffer_(NewArray<Record>(desired_buffer_size_in_bytes / sizeof(Record))), |
40 buffer_end_(buffer_ + desired_buffer_size_in_bytes / sizeof(Record)), | 40 buffer_end_(buffer_ + desired_buffer_size_in_bytes / sizeof(Record)), |
41 enqueue_semaphore_(OS::CreateSemaphore((buffer_end_ - buffer_) - 1)), | 41 enqueue_semaphore_( |
| 42 OS::CreateSemaphore(static_cast<int>(buffer_end_ - buffer_) - 1)), |
42 enqueue_pos_(buffer_), | 43 enqueue_pos_(buffer_), |
43 dequeue_pos_(buffer_) { | 44 dequeue_pos_(buffer_) { |
44 // To be able to distinguish between a full and an empty queue | 45 // To be able to distinguish between a full and an empty queue |
45 // state, the queue must be capable of containing at least 2 | 46 // state, the queue must be capable of containing at least 2 |
46 // records. | 47 // records. |
47 ASSERT((buffer_end_ - buffer_) >= 2); | 48 ASSERT((buffer_end_ - buffer_) >= 2); |
48 } | 49 } |
49 | 50 |
50 | 51 |
51 template<typename Record> | 52 template<typename Record> |
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91 | 92 |
92 void SamplingCircularQueue::WrapPositionIfNeeded( | 93 void SamplingCircularQueue::WrapPositionIfNeeded( |
93 SamplingCircularQueue::Cell** pos) { | 94 SamplingCircularQueue::Cell** pos) { |
94 if (**pos == kEnd) *pos = buffer_; | 95 if (**pos == kEnd) *pos = buffer_; |
95 } | 96 } |
96 | 97 |
97 | 98 |
98 } } // namespace v8::internal | 99 } } // namespace v8::internal |
99 | 100 |
100 #endif // V8_CIRCULAR_BUFFER_INL_H_ | 101 #endif // V8_CIRCULAR_BUFFER_INL_H_ |
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