nsCycleCollector.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* 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 nsICycleCollectorLogSink;

class nsISupports;

template <class T>

struct already_AddRefed;

#include <cstdint>

#include "mozilla/Attributes.h"

namespace js {

class SliceBudget;

namespace mozilla {

class CycleCollectedJSContext;

}  // namespace mozilla

bool nsCycleCollector_init();

void nsCycleCollector_startup();

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(js::SliceBudget& aBudget,

                                      bool aRemoveChildlessNodes = false,

                                      bool aAsyncSnowWhiteFreeing = false);

void nsCycleCollector_prepareForGarbageCollection();

// If an incremental cycle collection is in progress, finish it.

void nsCycleCollector_finishAnyCurrentCollection();

void nsCycleCollector_dispatchDeferredDeletion(bool aContinuation = false,

                                               bool aPurge = false);

bool nsCycleCollector_doDeferredDeletion();

bool nsCycleCollector_doDeferredDeletionWithBudget(js::SliceBudget& aBudget);

already_AddRefed<nsICycleCollectorLogSink> nsCycleCollector_createLogSink(

    bool aLogGC);

already_AddRefed<nsICycleCollectorListener> nsCycleCollector_createLogger();

// Run a cycle collection and return whether anything was collected.

bool nsCycleCollector_collect(mozilla::CCReason aReason,

                              nsICycleCollectorListener* aManualListener);

void nsCycleCollector_collectSlice(js::SliceBudget& budget,

                                   mozilla::CCReason aReason,

                                   bool aPreferShorterSlices = false);

uint32_t nsCycleCollector_suspectedCount();

// If aDoCollect is true, then run the GC and CC a few times before

// shutting down the CC completely.

MOZ_CAN_RUN_SCRIPT

void nsCycleCollector_shutdown(bool aDoCollect = true);

// Helpers for interacting with JS

void nsCycleCollector_registerJSContext(mozilla::CycleCollectedJSContext* aCx);

void nsCycleCollector_forgetJSContext();

#endif  // nsCycleCollector_h__