1 // Copyright 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_ 31