js/ipc/JavaScriptChild.h
author maliu <max@mxli.us>
Wed, 25 Oct 2017 22:51:44 +0800
changeset 388396 31f87080283b1dc558f3781e0ec2ca59d102de82
parent 322595 39ac4382a2c019178604b90acd816753fe142908
child 448947 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1360587 - Part 2. Remove bouncer apk build config; source; docs, r=nalexander MozReview-Commit-ID: C1QJcr65yWu

/* -*- 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/. */

#ifndef mozilla_jsipc_JavaScriptChild_h_
#define mozilla_jsipc_JavaScriptChild_h_

#include "JavaScriptBase.h"
#include "mozilla/jsipc/PJavaScriptChild.h"

namespace mozilla {
namespace jsipc {

class JavaScriptChild : public JavaScriptBase<PJavaScriptChild>
{
  public:
    JavaScriptChild() : strongReferenceObjIdMinimum_(0) {}
    virtual ~JavaScriptChild();

    bool init();
    void trace(JSTracer* trc);
    void updateWeakPointers();

    void drop(JSObject* obj);

    bool allowMessage(JSContext* cx) override { return true; }

  protected:
    virtual bool isParent() override { return false; }
    virtual JSObject* scopeForTargetObjects() override;

    mozilla::ipc::IPCResult RecvDropTemporaryStrongReferences(const uint64_t& upToObjId) override;

  private:
    bool fail(JSContext* cx, ReturnStatus* rs);
    bool ok(ReturnStatus* rs);

    // JavaScriptChild will keep strong references to JS objects that are
    // referenced by the parent only if their ID is >=
    // strongReferenceObjIdMinimum_.
    uint64_t strongReferenceObjIdMinimum_;
};

} // namespace jsipc
} // namespace mozilla

#endif