| // Copyright (c) 2011 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. |
| |
| #ifndef PPAPI_PROXY_PLUGIN_MESSAGE_FILTER_H_ |
| #define PPAPI_PROXY_PLUGIN_MESSAGE_FILTER_H_ |
| |
| #include <set> |
| |
| #include "base/compiler_specific.h" |
| #include "ipc/ipc_channel_proxy.h" |
| #include "ipc/ipc_sender.h" |
| #include "ppapi/c/pp_instance.h" |
| |
| namespace ppapi { |
| namespace proxy { |
| |
| // Listens for messages on the I/O thread of the plugin and handles some of |
| // them to avoid needing to block on the plugin. |
| // |
| // There is one instance of this class for each renderer channel (same as for |
| // the PluginDispatchers). |
| class PluginMessageFilter : public IPC::ChannelProxy::MessageFilter, |
| public IPC::Sender { |
| public: |
| // The input is a pointer to a set that will be used to uniquify PP_Instances |
| // across all renderer channels. The same pointer should be passed to each |
| // MessageFilter to ensure uniqueness, and the value should outlive this |
| // class. |
| PluginMessageFilter(std::set<PP_Instance>* seen_instance_ids); |
| virtual ~PluginMessageFilter(); |
| |
| // MessageFilter implementation. |
| virtual void OnFilterAdded(IPC::Channel* channel) OVERRIDE; |
| virtual void OnFilterRemoved() OVERRIDE; |
| virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE; |
| |
| // IPC::Sender implementation. |
| virtual bool Send(IPC::Message* msg) OVERRIDE; |
| |
| private: |
| void OnMsgReserveInstanceId(PP_Instance instance, bool* usable); |
| |
| // All instance IDs every queried by any renderer on this plugin. This is |
| // used to make sure that new instance IDs are unique. This is a non-owning |
| // pointer, it will be managed by the later that creates this class. |
| std::set<PP_Instance>* seen_instance_ids_; |
| |
| // The IPC channel to the renderer. May be NULL if we're not currently |
| // attached as a filter. |
| IPC::Channel* channel_; |
| }; |
| |
| } // namespace proxy |
| } // namespace ppapi |
| |
| #endif // PPAPI_PROXY_PLUGIN_MESSAGE_FILTER_H_ |