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| 1 // Copyright (c) 2013 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 CONTENT_COMMON_SHARED_MEMORY_SEQLOCK_BUFFER_H_ |
| 6 #define CONTENT_COMMON_SHARED_MEMORY_SEQLOCK_BUFFER_H_ |
| 7 |
| 8 #include "content/common/one_writer_seqlock.h" |
| 9 |
| 10 namespace content { |
| 11 |
| 12 // This structure is stored in shared memory that's shared between the browser |
| 13 // which does the hardware polling, and the consumers of the data, |
| 14 // i.e. the renderers. The performance characteristics are that |
| 15 // we want low latency (so would like to avoid explicit communication via IPC |
| 16 // between producer and consumer) and relatively large data size. |
| 17 // |
| 18 // Writer and reader operate on the same buffer assuming contention is low, and |
| 19 // contention is detected by using the associated SeqLock. |
| 20 |
| 21 template<class Data> |
| 22 class SharedMemorySeqLockBuffer { |
| 23 public: |
| 24 OneWriterSeqLock seqlock; |
| 25 Data data; |
| 26 }; |
| 27 |
| 28 } // namespace content |
| 29 |
| 30 #endif // CONTENT_COMMON_SHARED_MEMORY_SEQLOCK_BUFFER_H_ |
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