File: shared_memory_seqlock_buffer.h

package info (click to toggle)
chromium 145.0.7632.116-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 5,974,048 kB
  • sloc: cpp: 36,197,932; ansic: 7,602,761; javascript: 3,563,590; python: 1,649,324; xml: 838,470; asm: 717,087; pascal: 185,708; sh: 88,786; perl: 88,718; objc: 79,984; sql: 59,811; cs: 42,452; fortran: 24,101; makefile: 21,016; tcl: 15,277; php: 14,022; yacc: 9,066; ruby: 7,553; awk: 3,720; lisp: 3,233; lex: 1,328; ada: 727; jsp: 228; sed: 36
file content (30 lines) | stat: -rw-r--r-- 1,064 bytes parent folder | download | duplicates (14) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
 
// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef DEVICE_BASE_SYNCHRONIZATION_SHARED_MEMORY_SEQLOCK_BUFFER_H_
#define DEVICE_BASE_SYNCHRONIZATION_SHARED_MEMORY_SEQLOCK_BUFFER_H_

#include "device/base/synchronization/one_writer_seqlock.h"

namespace device {

// This structure is stored in shared memory that's shared between the browser
// which does the hardware polling, and the consumers of the data,
// i.e. the renderers. The performance characteristics are that
// we want low latency (so would like to avoid explicit communication via IPC
// between producer and consumer) and relatively large data size.
//
// Writer and reader operate on the same buffer assuming contention is low, and
// contention is detected by using the associated SeqLock.

template <class Data>
class SharedMemorySeqLockBuffer {
 public:
  OneWriterSeqLock seqlock;
  Data data;
};

}  // namespace device

#endif  // DEVICE_BASE_SYNCHRONIZATION_SHARED_MEMORY_SEQLOCK_BUFFER_H_