gecko-dev/xpcom/glue/nsCycleCollectionParticipant.cpp

123 lines
3.3 KiB
C++

/* -*- 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/. */
#include "nsCycleCollectionParticipant.h"
#include "nsCOMPtr.h"
#include "jsapi.h"
#ifdef MOZILLA_INTERNAL_API
#include "nsString.h"
#else
#include "nsStringAPI.h"
#endif
void
nsScriptObjectTracer::NoteJSChild(void* aScriptThing, const char* aName,
void* aClosure)
{
nsCycleCollectionTraversalCallback* cb =
static_cast<nsCycleCollectionTraversalCallback*>(aClosure);
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(*cb, aName);
cb->NoteJSChild(aScriptThing);
}
NS_IMETHODIMP_(void)
nsXPCOMCycleCollectionParticipant::Root(void* aPtr)
{
nsISupports* s = static_cast<nsISupports*>(aPtr);
NS_ADDREF(s);
}
NS_IMETHODIMP_(void)
nsXPCOMCycleCollectionParticipant::Unroot(void* aPtr)
{
nsISupports* s = static_cast<nsISupports*>(aPtr);
NS_RELEASE(s);
}
// We define a default trace function because some participants don't need
// to trace anything, so it is okay for them not to define one.
NS_IMETHODIMP_(void)
nsXPCOMCycleCollectionParticipant::Trace(void* aPtr, const TraceCallbacks& aCb,
void* aClosure)
{
}
bool
nsXPCOMCycleCollectionParticipant::CheckForRightISupports(nsISupports* aSupports)
{
nsISupports* foo;
aSupports->QueryInterface(NS_GET_IID(nsCycleCollectionISupports),
reinterpret_cast<void**>(&foo));
return aSupports == foo;
}
void
CycleCollectionNoteEdgeNameImpl(nsCycleCollectionTraversalCallback& aCallback,
const char* aName,
uint32_t aFlags)
{
nsAutoCString arrayEdgeName(aName);
if (aFlags & CycleCollectionEdgeNameArrayFlag) {
arrayEdgeName.AppendLiteral("[i]");
}
aCallback.NoteNextEdgeName(arrayEdgeName.get());
}
void
TraceCallbackFunc::Trace(JS::Heap<JS::Value>* aPtr, const char* aName,
void* aClosure) const
{
if (aPtr->isMarkable()) {
mCallback(aPtr->toGCThing(), aName, aClosure);
}
}
void
TraceCallbackFunc::Trace(JS::Heap<jsid>* aPtr, const char* aName,
void* aClosure) const
{
void* thing = JSID_TO_GCTHING(*aPtr);
if (thing) {
mCallback(thing, aName, aClosure);
}
}
void
TraceCallbackFunc::Trace(JS::Heap<JSObject*>* aPtr, const char* aName,
void* aClosure) const
{
mCallback(*aPtr, aName, aClosure);
}
void
TraceCallbackFunc::Trace(JS::TenuredHeap<JSObject*>* aPtr, const char* aName,
void* aClosure) const
{
mCallback(*aPtr, aName, aClosure);
}
void
TraceCallbackFunc::Trace(JS::Heap<JSFunction*>* aPtr, const char* aName,
void* aClosure) const
{
mCallback(*aPtr, aName, aClosure);
}
void
TraceCallbackFunc::Trace(JS::Heap<JSString*>* aPtr, const char* aName,
void* aClosure) const
{
mCallback(*aPtr, aName, aClosure);
}
void
TraceCallbackFunc::Trace(JS::Heap<JSScript*>* aPtr, const char* aName,
void* aClosure) const
{
mCallback(aPtr->get(), aName, aClosure);
}