blob: 64d07d6c328b3e3e5430dcecb19d6aca0759424b [file] [log] [blame]
// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/callback.h"
#include "content/common/content_export.h"
#include "content/public/browser/browser_message_filter.h"
namespace content {
// Filter for MessagePort related IPC messages (creating and destroying a
// MessagePort, sending a message via a MessagePort etc).
class CONTENT_EXPORT MessagePortMessageFilter : public BrowserMessageFilter {
typedef base::Callback<int(void)> NextRoutingIDCallback;
// |next_routing_id| is owned by this object. It can be used up until
// OnChannelClosing.
explicit MessagePortMessageFilter(const NextRoutingIDCallback& callback);
// BrowserMessageFilter implementation.
virtual void OnChannelClosing() OVERRIDE;
virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
virtual void OnDestruct() const OVERRIDE;
int GetNextRoutingID();
// Updates message ports registered for |message_port_ids| and returns
// new routing IDs for the updated ports via |new_routing_ids|.
void UpdateMessagePortsWithNewRoutes(
const std::vector<int>& message_port_ids,
std::vector<int>* new_routing_ids);
// This is protected, so we can define sub classes for testing.
virtual ~MessagePortMessageFilter();
friend class BrowserThread;
friend class base::DeleteHelper<MessagePortMessageFilter>;
// Message handlers.
void OnCreateMessagePort(int* route_id, int* message_port_id);
// This is guaranteed to be valid until OnChannelClosing is invoked, and it's
// not used after.
NextRoutingIDCallback next_routing_id_;
} // namespace content