xpcom/glue/nsCycleCollectionTraversalCallback.h@97036ab72558 (annotated)
xpcom/glue/nsCycleCollectionTraversalCallback.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: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | #ifndef nsCycleCollectionTraversalCallback_h__ |
| michael@0 | 7 | #define nsCycleCollectionTraversalCallback_h__ |
| michael@0 | 8 | |
| michael@0 | 9 | #include "nsISupports.h" |
| michael@0 | 10 | |
| michael@0 | 11 | class nsCycleCollectionParticipant; |
| michael@0 | 12 | |
| michael@0 | 13 | class NS_NO_VTABLE nsCycleCollectionTraversalCallback |
| michael@0 | 14 | { |
| michael@0 | 15 | public: |
| michael@0 | 16 | // You must call DescribeRefCountedNode() with an accurate |
| michael@0 | 17 | // refcount, otherwise cycle collection will fail, and probably crash. |
| michael@0 | 18 | // If the callback cares about objname, it should put |
| michael@0 | 19 | // WANT_DEBUG_INFO in mFlags. |
| michael@0 | 20 | NS_IMETHOD_(void) DescribeRefCountedNode(nsrefcnt refcount, |
| michael@0 | 21 | const char* objname) = 0; |
| michael@0 | 22 | // Note, aCompartmentAddress is 0 if it is unknown. |
| michael@0 | 23 | NS_IMETHOD_(void) DescribeGCedNode(bool ismarked, |
| michael@0 | 24 | const char* objname, |
| michael@0 | 25 | uint64_t aCompartmentAddress = 0) = 0; |
| michael@0 | 26 | |
| michael@0 | 27 | NS_IMETHOD_(void) NoteXPCOMChild(nsISupports *child) = 0; |
| michael@0 | 28 | NS_IMETHOD_(void) NoteJSChild(void *child) = 0; |
| michael@0 | 29 | NS_IMETHOD_(void) NoteNativeChild(void *child, |
| michael@0 | 30 | nsCycleCollectionParticipant *helper) = 0; |
| michael@0 | 31 | |
| michael@0 | 32 | // Give a name to the edge associated with the next call to |
| michael@0 | 33 | // NoteXPCOMChild, NoteJSChild, or NoteNativeChild. |
| michael@0 | 34 | // Callbacks who care about this should set WANT_DEBUG_INFO in the |
| michael@0 | 35 | // flags. |
| michael@0 | 36 | NS_IMETHOD_(void) NoteNextEdgeName(const char* name) = 0; |
| michael@0 | 37 | |
| michael@0 | 38 | enum { |
| michael@0 | 39 | // Values for flags: |
| michael@0 | 40 | |
| michael@0 | 41 | // Caller should call NoteNextEdgeName and pass useful objName |
| michael@0 | 42 | // to DescribeRefCountedNode and DescribeGCedNode. |
| michael@0 | 43 | WANT_DEBUG_INFO = (1<<0), |
| michael@0 | 44 | |
| michael@0 | 45 | // Caller should not skip objects that we know will be |
| michael@0 | 46 | // uncollectable. |
| michael@0 | 47 | WANT_ALL_TRACES = (1<<1) |
| michael@0 | 48 | }; |
| michael@0 | 49 | uint32_t Flags() const { return mFlags; } |
| michael@0 | 50 | bool WantDebugInfo() const { return (mFlags & WANT_DEBUG_INFO) != 0; } |
| michael@0 | 51 | bool WantAllTraces() const { return (mFlags & WANT_ALL_TRACES) != 0; } |
| michael@0 | 52 | protected: |
| michael@0 | 53 | nsCycleCollectionTraversalCallback() : mFlags(0) {} |
| michael@0 | 54 | |
| michael@0 | 55 | uint32_t mFlags; |
| michael@0 | 56 | }; |
| michael@0 | 57 | |
| michael@0 | 58 | #endif // nsCycleCollectionTraversalCallback_h__ |
