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b08432d55e
GC_SHRINK is a fairly new type of GC that does more aggressive cleanups than a normal GC. This patch makes the browser run the GC in this mode when under memory pressure, or when the user pushes the Minimize Memory Usage button when on the about:memory page. --HG-- extra : rebase_source : abdd11ee5fa5eb0e3d58122d3d72e98328d47668
119 lines
4.5 KiB
C++
119 lines
4.5 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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// 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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