gecko-dev/js/ipc/JavaScriptChild.cpp

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * vim: set ts=4 sw=4 et 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 "JavaScriptChild.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/BindingUtils.h"
#include "mozilla/ipc/MessageChannel.h"
#include "nsContentUtils.h"
#include "xpcprivate.h"
#include "jsfriendapi.h"
#include "AccessCheck.h"

using namespace JS;
using namespace mozilla;
using namespace mozilla::jsipc;

using mozilla::AutoSafeJSContext;

static void
FinalizeChild(JSFreeOp *fop, JSFinalizeStatus status, bool isCompartment, void *data)
{
    if (status == JSFINALIZE_GROUP_START) {
        static_cast<JavaScriptChild *>(data)->finalize();
    }
}

static void
FixupChildAfterMovingGC(JSRuntime *rt, void *data)
{
    static_cast<JavaScriptChild *>(data)->fixupAfterMovingGC();
}

JavaScriptChild::JavaScriptChild(JSRuntime *rt)
  : JavaScriptShared(rt),
    JavaScriptBase<PJavaScriptChild>(rt)
{
}

JavaScriptChild::~JavaScriptChild()
{
    JS_RemoveFinalizeCallback(rt_, FinalizeChild);
    JS_RemoveMovingGCCallback(rt_, FixupChildAfterMovingGC);
}

bool
JavaScriptChild::init()
{
    if (!WrapperOwner::init())
        return false;
    if (!WrapperAnswer::init())
        return false;

    JS_AddFinalizeCallback(rt_, FinalizeChild, this);
    JS_AddMovingGCCallback(rt_, FixupChildAfterMovingGC, this);
    return true;
}

void
JavaScriptChild::finalize()
{
    objects_.sweep();
    objectIds_.sweep();
}

JSObject *
JavaScriptChild::defaultScope()
{
    return xpc::PrivilegedJunkScope();
}