File: syncable_changes_version.h

package info (click to toggle)
chromium-browser 70.0.3538.110-1~deb9u1
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 1,619,476 kB
  • sloc: cpp: 13,024,755; ansic: 1,349,823; python: 916,672; xml: 314,489; java: 280,047; asm: 276,936; perl: 75,771; objc: 66,634; sh: 45,860; cs: 28,354; php: 11,064; makefile: 10,911; yacc: 9,109; tcl: 8,403; ruby: 4,065; lex: 1,779; pascal: 1,411; lisp: 1,055; awk: 41; jsp: 39; sed: 17; sql: 3
file content (29 lines) | stat: -rw-r--r-- 973 bytes parent folder | download | duplicates (3) 
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
 
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_SYNC_SYNCABLE_SYNCABLE_CHANGES_VERSION_H_
#define COMPONENTS_SYNC_SYNCABLE_SYNCABLE_CHANGES_VERSION_H_

namespace syncer {
namespace syncable {

// For the most part, the sync engine treats version numbers as opaque values.
// However, there are parts of our code base that break this abstraction, and
// depend on the following two invariants:
//
//  1.  CHANGES_VERSION is less than 0.
//  2.  The server only issues positive version numbers.
//
// Breaking these abstractions makes some operations 10 times
// faster.  If either of these invariants change, then those queries
// must be revisited.

enum { CHANGES_VERSION = -1 };

#define CHANGES_VERSION_STRING "-1"

}  // namespace syncable
}  // namespace syncer

#endif  // COMPONENTS_SYNC_SYNCABLE_SYNCABLE_CHANGES_VERSION_H_