js/public/WeakMapPtr.h@97036ab72558 (annotated)
js/public/WeakMapPtr.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: 4 -*- |
| michael@0 | 2 | * vim: set ts=8 sts=4 et sw=4 tw=99: |
| 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 | #ifndef js_WeakMapPtr_h |
| michael@0 | 8 | #define js_WeakMapPtr_h |
| michael@0 | 9 | |
| michael@0 | 10 | #include "jspubtd.h" |
| michael@0 | 11 | |
| michael@0 | 12 | #include "js/TypeDecls.h" |
| michael@0 | 13 | |
| michael@0 | 14 | namespace JS { |
| michael@0 | 15 | |
| michael@0 | 16 | // A wrapper around the internal C++ representation of SpiderMonkey WeakMaps, |
| michael@0 | 17 | // usable outside the engine. |
| michael@0 | 18 | // |
| michael@0 | 19 | // The supported template specializations are enumerated in WeakMapPtr.cpp. If |
| michael@0 | 20 | // you want to use this class for a different key/value combination, add it to |
| michael@0 | 21 | // the list and the compiler will generate the relevant machinery. |
| michael@0 | 22 | template <typename K, typename V> |
| michael@0 | 23 | class JS_PUBLIC_API(WeakMapPtr) |
| michael@0 | 24 | { |
| michael@0 | 25 | public: |
| michael@0 | 26 | WeakMapPtr() : ptr(nullptr) {}; |
| michael@0 | 27 | bool init(JSContext *cx); |
| michael@0 | 28 | bool initialized() { return ptr != nullptr; }; |
| michael@0 | 29 | void destroy(); |
| michael@0 | 30 | virtual ~WeakMapPtr() { MOZ_ASSERT(!initialized()); } |
| michael@0 | 31 | void trace(JSTracer *tracer); |
| michael@0 | 32 | |
| michael@0 | 33 | V lookup(const K &key); |
| michael@0 | 34 | bool put(JSContext *cx, const K &key, const V &value); |
| michael@0 | 35 | |
| michael@0 | 36 | static void keyMarkCallback(JSTracer *trc, K key, void *data); |
| michael@0 | 37 | |
| michael@0 | 38 | private: |
| michael@0 | 39 | void *ptr; |
| michael@0 | 40 | |
| michael@0 | 41 | // WeakMapPtr is neither copyable nor assignable. |
| michael@0 | 42 | WeakMapPtr(const WeakMapPtr &wmp) MOZ_DELETE; |
| michael@0 | 43 | WeakMapPtr &operator=(const WeakMapPtr &wmp) MOZ_DELETE; |
| michael@0 | 44 | }; |
| michael@0 | 45 | |
| michael@0 | 46 | } /* namespace JS */ |
| michael@0 | 47 | |
| michael@0 | 48 | #endif /* js_WeakMapPtr_h */ |
