gecko/xpcom/base/nsCycleCollector.h
2013-07-09 13:30:58 -04:00

100 lines
2.9 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsCycleCollector_h__
#define nsCycleCollector_h__
class nsICycleCollectorListener;
class nsISupports;
class nsScriptObjectTracer;
#include "nsError.h"
#include "nsID.h"
namespace mozilla {
class CycleCollectedJSRuntime;
// See the comments in nsContentUtils.h for explanations of these functions.
typedef void* (*DeferredFinalizeAppendFunction)(void* pointers, void* thing);
typedef bool (*DeferredFinalizeFunction)(uint32_t slice, void* data);
}
// Contains various stats about the cycle collection.
class nsCycleCollectorResults
{
public:
nsCycleCollectorResults() :
mForcedGC(false), mMergedZones(false),
mVisitedRefCounted(0), mVisitedGCed(0),
mFreedRefCounted(0), mFreedGCed(0) {}
bool mForcedGC;
bool mMergedZones;
uint32_t mVisitedRefCounted;
uint32_t mVisitedGCed;
uint32_t mFreedRefCounted;
uint32_t mFreedGCed;
};
bool nsCycleCollector_init();
enum CCThreadingModel {
CCSingleThread,
CCWithTraverseThread
};
nsresult nsCycleCollector_startup(CCThreadingModel aThreadingModel);
typedef void (*CC_BeforeUnlinkCallback)(void);
void nsCycleCollector_setBeforeUnlinkCallback(CC_BeforeUnlinkCallback aCB);
typedef void (*CC_ForgetSkippableCallback)(void);
void nsCycleCollector_setForgetSkippableCallback(CC_ForgetSkippableCallback aCB);
void nsCycleCollector_forgetSkippable(bool aRemoveChildlessNodes = false);
void nsCycleCollector_dispatchDeferredDeletion();
void nsCycleCollector_collect(bool aManuallyTriggered,
nsCycleCollectorResults *aResults,
nsICycleCollectorListener *aListener);
uint32_t nsCycleCollector_suspectedCount();
void nsCycleCollector_shutdownThreads();
void nsCycleCollector_shutdown();
// Helpers for interacting with JS
void nsCycleCollector_registerJSRuntime(mozilla::CycleCollectedJSRuntime *aRt);
void nsCycleCollector_forgetJSRuntime();
#define NS_CYCLE_COLLECTOR_LOGGER_CID \
{ 0x58be81b4, 0x39d2, 0x437c, \
{ 0x94, 0xea, 0xae, 0xde, 0x2c, 0x62, 0x08, 0xd3 } }
extern nsresult
nsCycleCollectorLoggerConstructor(nsISupports* outer,
const nsIID& aIID,
void* *aInstancePtr);
namespace mozilla {
namespace cyclecollector {
void AddJSHolder(void* aHolder, nsScriptObjectTracer* aTracer);
void RemoveJSHolder(void* aHolder);
#ifdef DEBUG
bool TestJSHolder(void* aHolder);
#endif
void DeferredFinalize(DeferredFinalizeAppendFunction aAppendFunc,
DeferredFinalizeFunction aFunc,
void* aThing);
void DeferredFinalize(nsISupports* aSupports);
} // namespace cyclecollector
} // namespace mozilla
#endif // nsCycleCollector_h__