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      1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CONTENT_RENDERER_PEPPER_HOST_DISPATCHER_WRAPPER_H_
      6 #define CONTENT_RENDERER_PEPPER_HOST_DISPATCHER_WRAPPER_H_
      7 
      8 #include "base/memory/ref_counted.h"
      9 #include "base/process/process_handle.h"
     10 #include "content/renderer/pepper/pepper_hung_plugin_filter.h"
     11 #include "ppapi/c/pp_instance.h"
     12 #include "ppapi/c/ppp.h"
     13 #include "ppapi/proxy/host_dispatcher.h"
     14 #include "ppapi/shared_impl/ppapi_permissions.h"
     15 
     16 namespace IPC {
     17 struct ChannelHandle;
     18 }
     19 
     20 namespace content {
     21 class PepperHungPluginFilter;
     22 class PluginModule;
     23 
     24 // This class wraps a dispatcher and has the same lifetime. A dispatcher has
     25 // the same lifetime as a plugin module, which is longer than any particular
     26 // RenderView or plugin instance.
     27 class HostDispatcherWrapper {
     28  public:
     29   HostDispatcherWrapper(PluginModule* module,
     30                         base::ProcessId peer_pid,
     31                         int plugin_child_id,
     32                         const ppapi::PpapiPermissions& perms,
     33                         bool is_external);
     34   virtual ~HostDispatcherWrapper();
     35 
     36   bool Init(const IPC::ChannelHandle& channel_handle,
     37             PP_GetInterface_Func local_get_interface,
     38             const ppapi::Preferences& preferences,
     39             scoped_refptr<PepperHungPluginFilter> filter);
     40 
     41   // Implements GetInterface for the proxied plugin.
     42   const void* GetProxiedInterface(const char* name);
     43 
     44   // Notification to the out-of-process layer that the given plugin instance
     45   // has been created. This will happen before the normal PPB_Instance method
     46   // calls so the out-of-process code can set up the tracking information for
     47   // the new instance.
     48   void AddInstance(PP_Instance instance);
     49 
     50   // Like AddInstance but removes the given instance. This is called after
     51   // regular instance shutdown so the out-of-process code can clean up its
     52   // tracking information.
     53   void RemoveInstance(PP_Instance instance);
     54 
     55   base::ProcessId peer_pid() { return peer_pid_; }
     56   int plugin_child_id() { return plugin_child_id_; }
     57   ppapi::proxy::HostDispatcher* dispatcher() { return dispatcher_.get(); }
     58 
     59  private:
     60   PluginModule* module_;
     61 
     62   base::ProcessId peer_pid_;
     63 
     64   // ID that the browser process uses to idetify the child process for the
     65   // plugin. This isn't directly useful from our process (the renderer) except
     66   // in messages to the browser to disambiguate plugins.
     67   int plugin_child_id_;
     68 
     69   ppapi::PpapiPermissions permissions_;
     70   bool is_external_;
     71 
     72   scoped_ptr<ppapi::proxy::HostDispatcher> dispatcher_;
     73   scoped_ptr<ppapi::proxy::ProxyChannel::Delegate> dispatcher_delegate_;
     74   // We hold the hung_plugin_filter_ to guarantee it outlives |dispatcher_|,
     75   // since it is an observer of |dispatcher_| for sync calls.
     76   scoped_refptr<PepperHungPluginFilter> hung_plugin_filter_;
     77 };
     78 
     79 }  // namespace content
     80 
     81 #endif  // CONTENT_RENDERER_PEPPER_HOST_DISPATCHER_WRAPPER_H_
     82