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132 lines
4.9 KiB
C++
132 lines
4.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 nsCycleCollector_h__
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#define nsCycleCollector_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 nsCycleCollectionParticipant.h
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//#define DEBUG_CC
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class nsISupports;
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class nsICycleCollectorListener;
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class nsCycleCollectionParticipant;
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class nsCycleCollectionTraversalCallback;
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// An nsCycleCollectionLanguageRuntime is a per-language object that
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// implements language-specific aspects of the cycle collection task.
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struct nsCycleCollectionLanguageRuntime
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{
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virtual nsresult BeginCycleCollection(nsCycleCollectionTraversalCallback &cb,
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bool explainLiveExpectedGarbage) = 0;
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virtual nsresult FinishTraverse() = 0;
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virtual nsresult FinishCycleCollection() = 0;
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virtual nsCycleCollectionParticipant *ToParticipant(void *p) = 0;
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#ifdef DEBUG_CC
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virtual void PrintAllReferencesTo(void *p) = 0;
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#endif
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};
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nsresult nsCycleCollector_startup();
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typedef void (*CC_BeforeUnlinkCallback)(void);
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void nsCycleCollector_setBeforeUnlinkCallback(CC_BeforeUnlinkCallback aCB);
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typedef void (*CC_ForgetSkippableCallback)(void);
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void nsCycleCollector_setForgetSkippableCallback(CC_ForgetSkippableCallback aCB);
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void nsCycleCollector_forgetSkippable();
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#ifdef DEBUG_CC
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void nsCycleCollector_logPurpleRemoval(void* aObject);
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#endif
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// Returns the number of collected nodes.
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PRUint32 nsCycleCollector_collect(nsICycleCollectorListener *aListener);
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PRUint32 nsCycleCollector_suspectedCount();
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void nsCycleCollector_shutdownThreads();
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void nsCycleCollector_shutdown();
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// The JS runtime is special, it needs to call cycle collection during its GC.
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// If the JS runtime is registered nsCycleCollector_collect will call
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// nsCycleCollectionJSRuntime::Collect which will call
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// nsCycleCollector_doCollect, else nsCycleCollector_collect will call
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// nsCycleCollector_doCollect directly.
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struct nsCycleCollectionJSRuntime : public nsCycleCollectionLanguageRuntime
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{
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/**
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* Called before/after transitioning to/from the main thread.
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*/
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virtual void NotifyLeaveMainThread() = 0;
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virtual void NotifyEnterCycleCollectionThread() = 0;
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virtual void NotifyLeaveCycleCollectionThread() = 0;
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virtual void NotifyEnterMainThread() = 0;
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/**
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* Should we force a JavaScript GC before a CC?
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*/
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virtual bool NeedCollect() = 0;
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/**
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* Runs the JavaScript GC.
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*/
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virtual void Collect(bool shrinkingGC = false) = 0;
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};
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#ifdef DEBUG
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void nsCycleCollector_DEBUG_shouldBeFreed(nsISupports *n);
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void nsCycleCollector_DEBUG_wasFreed(nsISupports *n);
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#endif
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// Helpers for interacting with language-identified scripts
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void nsCycleCollector_registerRuntime(PRUint32 langID, nsCycleCollectionLanguageRuntime *rt);
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nsCycleCollectionLanguageRuntime * nsCycleCollector_getRuntime(PRUint32 langID);
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void nsCycleCollector_forgetRuntime(PRUint32 langID);
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#define NS_CYCLE_COLLECTOR_LOGGER_CID \
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{ 0x58be81b4, 0x39d2, 0x437c, \
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{ 0x94, 0xea, 0xae, 0xde, 0x2c, 0x62, 0x08, 0xd3 } }
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extern nsresult
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nsCycleCollectorLoggerConstructor(nsISupports* outer,
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const nsIID& aIID,
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void* *aInstancePtr);
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#endif // nsCycleCollector_h__
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