content/renderer/pepper/pepper_broker_impl.h

   1 // Copyright (c) 2012 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_PEPPER_BROKER_IMPL_H_
   6 #define CONTENT_RENDERER_PEPPER_PEPPER_BROKER_IMPL_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "base/process.h"
  10 #include "content/common/content_export.h"
  11 #include "ppapi/proxy/proxy_channel.h"
  12 #include "webkit/plugins/ppapi/plugin_delegate.h"
  13 #include "webkit/plugins/ppapi/ppb_broker_impl.h"
  14
  15 namespace IPC {
  16 struct ChannelHandle;
  17 }
  18
  19 namespace ppapi {
  20 namespace proxy {
  21 class BrokerDispatcher;
  22 }
  23 }
  24
  25 namespace webkit {
  26 namespace ppapi {
  27 class PluginModule;
  28 }
  29 }
  30
  31 namespace content {
  32
  33 class PepperPluginDelegateImpl;
  34
  35 // This object is NOT thread-safe.
  36 class CONTENT_EXPORT PepperBrokerDispatcherWrapper {
  37  public:
  38   PepperBrokerDispatcherWrapper();
  39   ~PepperBrokerDispatcherWrapper();
  40
  41   bool Init(base::ProcessId broker_pid,
  42             const IPC::ChannelHandle& channel_handle);
  43
  44   int32_t SendHandleToBroker(PP_Instance instance,
  45                              base::SyncSocket::Handle handle);
  46
  47  private:
  48   scoped_ptr<ppapi::proxy::BrokerDispatcher> dispatcher_;
  49   scoped_ptr<ppapi::proxy::ProxyChannel::Delegate> dispatcher_delegate_;
  50 };
  51
  52 class PepperBrokerImpl : public webkit::ppapi::PluginDelegate::Broker,
  53                          public base::RefCountedThreadSafe<PepperBrokerImpl>{
  54  public:
  55   PepperBrokerImpl(webkit::ppapi::PluginModule* plugin_module,
  56                    PepperPluginDelegateImpl* delegate_);
  57
  58   // webkit::ppapi::PluginDelegate::Broker implementation.
  59   virtual void Disconnect(webkit::ppapi::PPB_Broker_Impl* client) OVERRIDE;
  60
  61   // Adds a pending connection to the broker. Balances out Disconnect() calls.
  62   void AddPendingConnect(webkit::ppapi::PPB_Broker_Impl* client);
  63
  64   // Called when the channel to the broker has been established.
  65   void OnBrokerChannelConnected(base::ProcessId broker_pid,
  66                                 const IPC::ChannelHandle& channel_handle);
  67
  68   // Called when we know whether permission to access the PPAPI broker was
  69   // granted.
  70   void OnBrokerPermissionResult(webkit::ppapi::PPB_Broker_Impl* client,
  71                                 bool result);
  72
  73  private:
  74   friend class base::RefCountedThreadSafe<PepperBrokerImpl>;
  75
  76   struct PendingConnection {
  77     PendingConnection();
  78     ~PendingConnection();
  79
  80     bool is_authorized;
  81     base::WeakPtr<webkit::ppapi::PPB_Broker_Impl> client;
  82   };
  83
  84   virtual ~PepperBrokerImpl();
  85
  86   // Reports failure to all clients that had pending operations.
  87   void ReportFailureToClients(int error_code);
  88
  89   // Connects the plugin to the broker via a pipe.
  90   void ConnectPluginToBroker(webkit::ppapi::PPB_Broker_Impl* client);
  91
  92   scoped_ptr<PepperBrokerDispatcherWrapper> dispatcher_;
  93
  94   // A map of pointers to objects that have requested a connection to the weak
  95   // pointer we can use to reference them. The mapping is needed so we can clean
  96   // up entries for objects that may have been deleted.
  97   typedef std::map<webkit::ppapi::PPB_Broker_Impl*, PendingConnection>
  98       ClientMap;
  99   ClientMap pending_connects_;
 100
 101   // Pointer to the associated plugin module.
 102   // Always set and cleared at the same time as the module's pointer to this.
 103   webkit::ppapi::PluginModule* plugin_module_;
 104
 105   base::WeakPtr<PepperPluginDelegateImpl> delegate_;
 106
 107   DISALLOW_COPY_AND_ASSIGN(PepperBrokerImpl);
 108 };
 109
 110 }  // namespace content
 111
 112 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_BROKER_IMPL_H_