mfbt/ReentrancyGuard.h@97036ab72558 (annotated)
mfbt/ReentrancyGuard.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.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* vim: set ts=8 sts=2 et sw=2 tw=80: */ |
| michael@0 | 3 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 6 | |
| michael@0 | 7 | /* Small helper class for asserting uses of a class are non-reentrant. */ |
| michael@0 | 8 | |
| michael@0 | 9 | #ifndef mozilla_ReentrancyGuard_h |
| michael@0 | 10 | #define mozilla_ReentrancyGuard_h |
| michael@0 | 11 | |
| michael@0 | 12 | #include "mozilla/Assertions.h" |
| michael@0 | 13 | #include "mozilla/Attributes.h" |
| michael@0 | 14 | #include "mozilla/GuardObjects.h" |
| michael@0 | 15 | |
| michael@0 | 16 | namespace mozilla { |
| michael@0 | 17 | |
| michael@0 | 18 | /* Useful for implementing containers that assert non-reentrancy */ |
| michael@0 | 19 | class ReentrancyGuard |
| michael@0 | 20 | { |
| michael@0 | 21 | MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER |
| michael@0 | 22 | #ifdef DEBUG |
| michael@0 | 23 | bool& entered; |
| michael@0 | 24 | #endif |
| michael@0 | 25 | |
| michael@0 | 26 | public: |
| michael@0 | 27 | template<class T> |
| michael@0 | 28 | #ifdef DEBUG |
| michael@0 | 29 | ReentrancyGuard(T& obj |
| michael@0 | 30 | MOZ_GUARD_OBJECT_NOTIFIER_PARAM) |
| michael@0 | 31 | : entered(obj.entered) |
| michael@0 | 32 | #else |
| michael@0 | 33 | ReentrancyGuard(T& |
| michael@0 | 34 | MOZ_GUARD_OBJECT_NOTIFIER_PARAM) |
| michael@0 | 35 | #endif |
| michael@0 | 36 | { |
| michael@0 | 37 | MOZ_GUARD_OBJECT_NOTIFIER_INIT; |
| michael@0 | 38 | #ifdef DEBUG |
| michael@0 | 39 | MOZ_ASSERT(!entered); |
| michael@0 | 40 | entered = true; |
| michael@0 | 41 | #endif |
| michael@0 | 42 | } |
| michael@0 | 43 | ~ReentrancyGuard() |
| michael@0 | 44 | { |
| michael@0 | 45 | #ifdef DEBUG |
| michael@0 | 46 | entered = false; |
| michael@0 | 47 | #endif |
| michael@0 | 48 | } |
| michael@0 | 49 | |
| michael@0 | 50 | private: |
| michael@0 | 51 | ReentrancyGuard(const ReentrancyGuard&) MOZ_DELETE; |
| michael@0 | 52 | void operator=(const ReentrancyGuard&) MOZ_DELETE; |
| michael@0 | 53 | }; |
| michael@0 | 54 | |
| michael@0 | 55 | } // namespace mozilla |
| michael@0 | 56 | |
| michael@0 | 57 | #endif /* mozilla_ReentrancyGuard_h */ |
