зеркало из https://github.com/mozilla/pjs.git
503 строки
26 KiB
C++
503 строки
26 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* The Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2006
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsCycleCollectionParticipant_h__
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#define nsCycleCollectionParticipant_h__
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#include "nsISupports.h"
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// NOTE: If you use header files to define DEBUG_CC, you must do so here
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// *and* in nsCycleCollector.h
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//#define DEBUG_CC
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#ifdef DEBUG_CC
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#define IF_DEBUG_CC_PARAM(_p) , _p
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#define IF_DEBUG_CC_ONLY_PARAM(_p) _p
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#else
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#define IF_DEBUG_CC_PARAM(_p)
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#define IF_DEBUG_CC_ONLY_PARAM(_p)
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#endif
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#define NS_CYCLECOLLECTIONPARTICIPANT_IID \
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{ \
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0x9674489b, \
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0x1f6f, \
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0x4550, \
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{ 0xa7, 0x30, 0xcc, 0xae, 0xdd, 0x10, 0x4c, 0xf9 } \
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}
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/**
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* Special IID to get at the base nsISupports for a class. Usually this is the
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* canonical nsISupports pointer, but in the case of tearoffs for example it is
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* the base nsISupports pointer of the tearoff. This allow the cycle collector
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* to have separate nsCycleCollectionParticipant's for tearoffs or aggregated
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* classes.
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*/
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#define NS_CYCLECOLLECTIONISUPPORTS_IID \
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{ \
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0xc61eac14, \
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0x5f7a, \
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0x4481, \
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{ 0x96, 0x5e, 0x7e, 0xaa, 0x6e, 0xff, 0xa8, 0x5f } \
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}
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/**
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* Just holds the IID so NS_GET_IID works.
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*/
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class nsCycleCollectionISupports
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{
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_CYCLECOLLECTIONISUPPORTS_IID)
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsCycleCollectionISupports,
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NS_CYCLECOLLECTIONISUPPORTS_IID)
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class nsCycleCollectionParticipant;
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class NS_NO_VTABLE nsCycleCollectionTraversalCallback
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{
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public:
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// You must call DescribeNode() with an accurate refcount,
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// otherwise cycle collection will fail, and probably crash.
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#ifdef DEBUG_CC
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NS_IMETHOD_(void) DescribeNode(nsrefcnt refcount,
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size_t objsz,
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const char *objname) = 0;
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#else
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NS_IMETHOD_(void) DescribeNode(nsrefcnt refcount) = 0;
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#endif
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NS_IMETHOD_(void) NoteScriptChild(PRUint32 langID, void *child) = 0;
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NS_IMETHOD_(void) NoteXPCOMChild(nsISupports *child) = 0;
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NS_IMETHOD_(void) NoteNativeChild(void *child,
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nsCycleCollectionParticipant *helper) = 0;
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};
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class NS_NO_VTABLE nsCycleCollectionParticipant
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{
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_CYCLECOLLECTIONPARTICIPANT_IID)
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NS_IMETHOD Traverse(void *p, nsCycleCollectionTraversalCallback &cb) = 0;
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NS_IMETHOD Root(void *p) = 0;
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NS_IMETHOD Unlink(void *p) = 0;
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NS_IMETHOD Unroot(void *p) = 0;
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsCycleCollectionParticipant,
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NS_CYCLECOLLECTIONPARTICIPANT_IID)
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#undef IMETHOD_VISIBILITY
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#define IMETHOD_VISIBILITY NS_COM_GLUE
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class NS_COM_GLUE nsXPCOMCycleCollectionParticipant
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: public nsCycleCollectionParticipant
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{
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public:
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NS_IMETHOD Traverse(void *p, nsCycleCollectionTraversalCallback &cb);
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NS_IMETHOD Root(void *p);
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NS_IMETHOD Unlink(void *p);
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NS_IMETHOD Unroot(void *p);
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NS_IMETHOD_(void) UnmarkPurple(nsISupports *p);
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PRBool CheckForRightISupports(nsISupports *s);
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};
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#undef IMETHOD_VISIBILITY
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#define IMETHOD_VISIBILITY NS_VISIBILITY_HIDDEN
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///////////////////////////////////////////////////////////////////////////////
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// Helpers for implementing a QI to nsXPCOMCycleCollectionParticipant
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///////////////////////////////////////////////////////////////////////////////
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#define NS_CYCLE_COLLECTION_INNERCLASS \
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cycleCollection
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#define NS_CYCLE_COLLECTION_CLASSNAME(_class) \
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_class::NS_CYCLE_COLLECTION_INNERCLASS
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#define NS_CYCLE_COLLECTION_NAME(_class) \
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_class##_cycleCollectorGlobal
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#define NS_IMPL_QUERY_CYCLE_COLLECTION(_class) \
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if ( aIID.Equals(NS_GET_IID(nsXPCOMCycleCollectionParticipant)) ) { \
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*aInstancePtr = & NS_CYCLE_COLLECTION_NAME(_class); \
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return NS_OK; \
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} else
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#define NS_IMPL_QUERY_CYCLE_COLLECTION_ISUPPORTS(_class) \
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if ( aIID.Equals(NS_GET_IID(nsCycleCollectionISupports)) ) \
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foundInterface = NS_CYCLE_COLLECTION_CLASSNAME(_class)::Upcast(this); \
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else
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#define NS_INTERFACE_MAP_ENTRY_CYCLE_COLLECTION(_class) \
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NS_IMPL_QUERY_CYCLE_COLLECTION(_class)
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#define NS_INTERFACE_MAP_ENTRY_CYCLE_COLLECTION_ISUPPORTS(_class) \
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NS_IMPL_QUERY_CYCLE_COLLECTION_ISUPPORTS(_class)
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#define NS_INTERFACE_MAP_ENTRIES_CYCLE_COLLECTION(_class) \
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NS_INTERFACE_MAP_ENTRY_CYCLE_COLLECTION(_class) \
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NS_INTERFACE_MAP_ENTRY_CYCLE_COLLECTION_ISUPPORTS(_class)
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#define NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(_class) \
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NS_INTERFACE_MAP_BEGIN(_class) \
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NS_INTERFACE_MAP_ENTRIES_CYCLE_COLLECTION(_class)
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#define NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(_class) \
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NS_INTERFACE_MAP_BEGIN(_class) \
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NS_INTERFACE_MAP_ENTRY_CYCLE_COLLECTION(_class)
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#define NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(_class) \
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if (rv == NS_OK) return rv; \
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nsISupports* foundInterface; \
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NS_INTERFACE_MAP_ENTRIES_CYCLE_COLLECTION(_class)
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#define NS_INTERFACE_TABLE_HEAD_CYCLE_COLLECTION_INHERITED(_class) \
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NS_IMETHODIMP _class::QueryInterface(REFNSIID aIID, void** aInstancePtr) \
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{ \
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NS_PRECONDITION(aInstancePtr, "null out param"); \
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\
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if ( aIID.Equals(NS_GET_IID(nsXPCOMCycleCollectionParticipant)) ) { \
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*aInstancePtr = &NS_CYCLE_COLLECTION_NAME(_class); \
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return NS_OK; \
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} \
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nsresult rv;
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///////////////////////////////////////////////////////////////////////////////
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// Helpers for implementing nsCycleCollectionParticipant::Unlink
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///////////////////////////////////////////////////////////////////////////////
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#define NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \
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NS_IMETHODIMP \
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NS_CYCLE_COLLECTION_CLASSNAME(_class)::Unlink(void *p) \
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{ \
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nsISupports *s = static_cast<nsISupports*>(p); \
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NS_ASSERTION(CheckForRightISupports(s), \
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"not the nsISupports pointer we expect"); \
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_class *tmp = Downcast(s);
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#define NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(_class, _base_class) \
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NS_IMETHODIMP \
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NS_CYCLE_COLLECTION_CLASSNAME(_class)::Unlink(void *p) \
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{ \
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nsISupports *s = static_cast<nsISupports*>(p); \
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NS_ASSERTION(CheckForRightISupports(s), \
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"not the nsISupports pointer we expect"); \
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_class *tmp = static_cast<_class*>(Downcast(s)); \
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NS_CYCLE_COLLECTION_CLASSNAME(_base_class)::Unlink(s);
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#define NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_NATIVE(_class) \
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NS_IMETHODIMP \
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NS_CYCLE_COLLECTION_CLASSNAME(_class)::Unlink(void *p) \
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{ \
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_class *tmp = static_cast<_class*>(p);
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#define NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_field) \
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tmp->_field = NULL;
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#define NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMARRAY(_field) \
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tmp->_field.Clear();
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#define NS_IMPL_CYCLE_COLLECTION_UNLINK_NSTARRAY(_field) \
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tmp->_field.Clear();
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#define NS_IMPL_CYCLE_COLLECTION_UNLINK_END \
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return NS_OK; \
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}
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#define NS_IMPL_CYCLE_COLLECTION_UNLINK_0(_class) \
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NS_IMETHODIMP \
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NS_CYCLE_COLLECTION_CLASSNAME(_class)::Unlink(void *p) \
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{ \
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NS_ASSERTION(CheckForRightISupports(static_cast<nsISupports*>(p)), \
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"not the nsISupports pointer we expect"); \
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return NS_OK; \
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}
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#define NS_IMPL_CYCLE_COLLECTION_UNLINK_NATIVE_0(_class) \
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NS_IMETHODIMP \
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NS_CYCLE_COLLECTION_CLASSNAME(_class)::Unlink(void *p) \
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{ \
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return NS_OK; \
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}
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///////////////////////////////////////////////////////////////////////////////
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// Helpers for implementing nsCycleCollectionParticipant::Traverse
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///////////////////////////////////////////////////////////////////////////////
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#ifdef DEBUG_CC
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#define NS_IMPL_CYCLE_COLLECTION_DESCRIBE(_class) \
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cb.DescribeNode(tmp->mRefCnt.get(), sizeof(_class), #_class);
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#else
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#define NS_IMPL_CYCLE_COLLECTION_DESCRIBE(_class) \
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cb.DescribeNode(tmp->mRefCnt.get());
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#endif
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#define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \
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NS_IMETHODIMP \
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NS_CYCLE_COLLECTION_CLASSNAME(_class)::Traverse \
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(void *p, \
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nsCycleCollectionTraversalCallback &cb) \
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{ \
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nsISupports *s = static_cast<nsISupports*>(p); \
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NS_ASSERTION(CheckForRightISupports(s), \
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"not the nsISupports pointer we expect"); \
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_class *tmp = Downcast(s); \
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NS_IMPL_CYCLE_COLLECTION_DESCRIBE(_class)
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#define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(_class, _base_class) \
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NS_IMETHODIMP \
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NS_CYCLE_COLLECTION_CLASSNAME(_class)::Traverse \
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(void *p, \
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nsCycleCollectionTraversalCallback &cb) \
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{ \
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nsISupports *s = static_cast<nsISupports*>(p); \
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NS_ASSERTION(CheckForRightISupports(s), \
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"not the nsISupports pointer we expect"); \
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_class *tmp = static_cast<_class*>(Downcast(s)); \
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NS_CYCLE_COLLECTION_CLASSNAME(_base_class)::Traverse(s, cb);
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#define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NATIVE_BEGIN(_class) \
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NS_IMETHODIMP \
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NS_CYCLE_COLLECTION_CLASSNAME(_class)::Traverse \
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(void *p, \
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nsCycleCollectionTraversalCallback &cb) \
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{ \
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_class *tmp = static_cast<_class*>(p); \
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NS_IMPL_CYCLE_COLLECTION_DESCRIBE(_class)
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#define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_RAWPTR(_field) \
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cb.NoteXPCOMChild(tmp->_field);
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#define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_field) \
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cb.NoteXPCOMChild(tmp->_field.get());
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#define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR_AMBIGUOUS(_field, _base) \
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cb.NoteXPCOMChild(NS_ISUPPORTS_CAST(_base*, tmp->_field));
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#define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMARRAY(_field) \
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{ \
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PRInt32 i; \
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for (i = 0; i < tmp->_field.Count(); ++i) \
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cb.NoteXPCOMChild(tmp->_field[i]); \
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}
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#define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NATIVE_PTR(_ptr, _ptr_class) \
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cb.NoteNativeChild(_ptr, &NS_CYCLE_COLLECTION_NATIVE_NAME(_ptr_class));
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#define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NATIVE_MEMBER(_field, _field_class) \
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NATIVE_PTR(tmp->_field, _field_class)
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#define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSTARRAY(_array, _element_class) \
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{ \
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PRUint32 i, length = (_array).Length(); \
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for (i = 0; i < length; ++i) \
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NATIVE_PTR((_array)[i], \
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_element_class); \
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}
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#define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSTARRAY_MEMBER(_field, \
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_element_class) \
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSTARRAY(tmp->_field, _element_class)
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#define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END \
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return NS_OK; \
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}
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///////////////////////////////////////////////////////////////////////////////
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// Helpers for implementing a concrete nsCycleCollectionParticipant
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///////////////////////////////////////////////////////////////////////////////
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#define NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(_class, _base) \
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class NS_CYCLE_COLLECTION_INNERCLASS \
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: public nsXPCOMCycleCollectionParticipant \
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{ \
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public: \
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NS_IMETHOD Unlink(void *p); \
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NS_IMETHOD Traverse(void *p, \
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nsCycleCollectionTraversalCallback &cb); \
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NS_IMETHOD_(void) UnmarkPurple(nsISupports *s) \
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{ \
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Downcast(s)->UnmarkPurple(); \
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} \
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static _class* Downcast(nsISupports* s) \
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{ \
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return static_cast<_class*>(static_cast<_base*>(s)); \
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} \
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static nsISupports* Upcast(_class *p) \
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{ \
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return NS_ISUPPORTS_CAST(_base*, p); \
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} \
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};
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#define NS_DECL_CYCLE_COLLECTION_CLASS(_class) \
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NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(_class, _class)
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#define NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(_class, _base_class) \
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class NS_CYCLE_COLLECTION_INNERCLASS \
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: public NS_CYCLE_COLLECTION_CLASSNAME(_base_class) \
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{ \
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public: \
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NS_IMETHOD Unlink(void *p); \
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NS_IMETHOD Traverse(void *p, \
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nsCycleCollectionTraversalCallback &cb); \
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static _class* Downcast(nsISupports* s) \
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{ \
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return static_cast<_class*>(static_cast<_base_class*>( \
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NS_CYCLE_COLLECTION_CLASSNAME(_base_class)::Downcast(s))); \
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} \
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};
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#define NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED_NO_UNLINK(_class, \
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_base_class) \
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class NS_CYCLE_COLLECTION_INNERCLASS \
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: public NS_CYCLE_COLLECTION_CLASSNAME(_base_class) \
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{ \
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public: \
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NS_IMETHOD Traverse(void *p, \
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nsCycleCollectionTraversalCallback &cb); \
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static _class* Downcast(nsISupports* s) \
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{ \
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return static_cast<_class*>(static_cast<_base_class*>( \
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NS_CYCLE_COLLECTION_CLASSNAME(_base_class)::Downcast(s))); \
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} \
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};
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/**
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* This implements a stub UnmarkPurple function for classes that want to be
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* traversed but whose AddRef/Release functions don't add/remove them to/from
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* the purple buffer. If you're just using NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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* then you don't need this.
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*/
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#define NS_DECL_CYCLE_COLLECTION_UNMARK_PURPLE_STUB(_class) \
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NS_IMETHODIMP_(void) UnmarkPurple() \
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{ \
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} \
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#define NS_IMPL_CYCLE_COLLECTION_CLASS(_class) \
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static NS_CYCLE_COLLECTION_CLASSNAME(_class) \
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NS_CYCLE_COLLECTION_NAME(_class);
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#define NS_CYCLE_COLLECTION_NATIVE_INNERNAME \
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_cycleCollectorGlobal
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#define NS_CYCLE_COLLECTION_NATIVE_NAME(_class) \
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_class::NS_CYCLE_COLLECTION_NATIVE_INNERNAME
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#define NS_DECL_CYCLE_COLLECTION_NATIVE_CLASS(_class) \
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class NS_CYCLE_COLLECTION_INNERCLASS \
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: public nsCycleCollectionParticipant \
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{ \
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public: \
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NS_IMETHOD Root(void *n); \
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NS_IMETHOD Unlink(void *n); \
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NS_IMETHOD Unroot(void *n); \
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NS_IMETHOD Traverse(void *n, \
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nsCycleCollectionTraversalCallback &cb); \
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}; \
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static NS_CYCLE_COLLECTION_INNERCLASS \
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NS_CYCLE_COLLECTION_NATIVE_INNERNAME;
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#define NS_IMPL_CYCLE_COLLECTION_NATIVE_CLASS(_class) \
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NS_CYCLE_COLLECTION_CLASSNAME(_class) NS_CYCLE_COLLECTION_NATIVE_NAME(_class);
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#define NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(_class, _root_function) \
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NS_IMETHODIMP \
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NS_CYCLE_COLLECTION_CLASSNAME(_class)::Root(void *p) \
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{ \
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_class *tmp = static_cast<_class*>(p); \
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tmp->_root_function(); \
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return NS_OK; \
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}
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#define NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(_class, _unroot_function) \
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NS_IMETHODIMP \
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NS_CYCLE_COLLECTION_CLASSNAME(_class)::Unroot(void *p) \
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{ \
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_class *tmp = static_cast<_class*>(p); \
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tmp->_unroot_function(); \
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return NS_OK; \
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}
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#define NS_IMPL_CYCLE_COLLECTION_0(_class) \
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NS_IMPL_CYCLE_COLLECTION_CLASS(_class) \
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END \
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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#define NS_IMPL_CYCLE_COLLECTION_1(_class, _f) \
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NS_IMPL_CYCLE_COLLECTION_CLASS(_class) \
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \
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NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f) \
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END \
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f) \
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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#define NS_IMPL_CYCLE_COLLECTION_2(_class, _f1, _f2) \
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NS_IMPL_CYCLE_COLLECTION_CLASS(_class) \
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \
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NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f1) \
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NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f2) \
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END \
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f1) \
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f2) \
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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#define NS_IMPL_CYCLE_COLLECTION_3(_class, _f1, _f2, _f3) \
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NS_IMPL_CYCLE_COLLECTION_CLASS(_class) \
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \
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NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f1) \
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NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f2) \
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NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f3) \
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END \
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f1) \
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f2) \
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f3) \
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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#endif // nsCycleCollectionParticipant_h__
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