gecko/xpcom/glue/nsCycleCollectionParticipant.cpp

69 lines
1.9 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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"
#ifdef MOZILLA_INTERNAL_API
#include "nsString.h"
#else
#include "nsStringAPI.h"
#endif
void
nsScriptObjectTracer::NoteJSChild(void *aScriptThing, const char *name,
void *aClosure)
{
nsCycleCollectionTraversalCallback *cb =
static_cast<nsCycleCollectionTraversalCallback*>(aClosure);
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(*cb, name);
cb->NoteJSChild(aScriptThing);
}
nsresult
nsXPCOMCycleCollectionParticipant::RootImpl(void *p)
{
nsISupports *s = static_cast<nsISupports*>(p);
NS_ADDREF(s);
return NS_OK;
}
nsresult
nsXPCOMCycleCollectionParticipant::UnrootImpl(void *p)
{
nsISupports *s = static_cast<nsISupports*>(p);
NS_RELEASE(s);
return NS_OK;
}
// 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::TraceImpl(void *p, TraceCallback cb,
void *closure)
{
}
bool
nsXPCOMCycleCollectionParticipant::CheckForRightISupports(nsISupports *s)
{
nsISupports* foo;
s->QueryInterface(NS_GET_IID(nsCycleCollectionISupports),
reinterpret_cast<void**>(&foo));
return s == foo;
}
void
CycleCollectionNoteEdgeNameImpl(nsCycleCollectionTraversalCallback& aCallback,
const char* aName,
uint32_t aFlags)
{
nsAutoCString arrayEdgeName(aName);
if (aFlags & CycleCollectionEdgeNameArrayFlag) {
arrayEdgeName.AppendLiteral("[i]");
}
aCallback.NoteNextEdgeName(arrayEdgeName.get());
}