security/sandbox/chromium/base/sequence_checker.h@97036ab72558
security/sandbox/chromium/base/sequence_checker.h
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
1 // Copyright (c) 2012 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.
5 #ifndef BASE_SEQUENCE_CHECKER_H_
6 #define BASE_SEQUENCE_CHECKER_H_
8 #include "base/memory/ref_counted.h"
10 // See comments for the similar block in thread_checker.h.
11 #if (!defined(NDEBUG) || defined(DCHECK_ALWAYS_ON))
12 #define ENABLE_SEQUENCE_CHECKER 1
13 #else
14 #define ENABLE_SEQUENCE_CHECKER 0
15 #endif
17 #if ENABLE_SEQUENCE_CHECKER
18 #include "base/sequence_checker_impl.h"
19 #endif
21 namespace base {
23 class SequencedTaskRunner;
25 // Do nothing implementation, for use in release mode.
26 //
27 // Note: You should almost always use the SequenceChecker class to get
28 // the right version for your build configuration.
29 class SequenceCheckerDoNothing {
30 public:
31 bool CalledOnValidSequencedThread() const {
32 return true;
33 }
35 void DetachFromSequence() {}
36 };
38 // SequenceChecker is a helper class used to help verify that some
39 // methods of a class are called in sequence -- that is, called from
40 // the same SequencedTaskRunner. It is a generalization of
41 // ThreadChecker; see comments in sequence_checker_impl.h for details.
42 //
43 // Example:
44 // class MyClass {
45 // public:
46 // void Foo() {
47 // DCHECK(sequence_checker_.CalledOnValidSequence());
48 // ... (do stuff) ...
49 // }
50 //
51 // private:
52 // SequenceChecker sequence_checker_;
53 // }
54 //
55 // In Release mode, CalledOnValidSequence will always return true.
56 #if ENABLE_SEQUENCE_CHECKER
57 class SequenceChecker : public SequenceCheckerImpl {
58 };
59 #else
60 class SequenceChecker : public SequenceCheckerDoNothing {
61 };
62 #endif // ENABLE_SEQUENCE_CHECKER
64 #undef ENABLE_SEQUENCE_CHECKER
66 } // namespace base
68 #endif // BASE_SEQUENCE_CHECKER_H_
