ppapi/proxy/ppb_buffer_proxy.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 PPAPI_PROXY_PPB_BUFFER_PROXY_H_
   6 #define PPAPI_PROXY_PPB_BUFFER_PROXY_H_
   7
   8 #include "base/memory/shared_memory.h"
   9 #include "ppapi/c/pp_instance.h"
  10 #include "ppapi/proxy/interface_proxy.h"
  11 #include "ppapi/shared_impl/resource.h"
  12 #include "ppapi/thunk/ppb_buffer_api.h"
  13
  14 namespace ppapi {
  15
  16 class HostResource;
  17
  18 namespace proxy {
  19
  20 class SerializedHandle;
  21
  22 class Buffer : public thunk::PPB_Buffer_API, public Resource {
  23  public:
  24   Buffer(const HostResource& resource,
  25          const base::SharedMemoryHandle& shm_handle,
  26          uint32_t size);
  27   ~Buffer() override;
  28
  29   // Resource overrides.
  30   thunk::PPB_Buffer_API* AsPPB_Buffer_API() override;
  31
  32   // PPB_Buffer_API implementation.
  33   PP_Bool Describe(uint32_t* size_in_bytes) override;
  34   PP_Bool IsMapped() override;
  35   void* Map() override;
  36   void Unmap() override;
  37
  38   // Trusted
  39   int32_t GetSharedMemory(int* handle) override;
  40
  41  private:
  42   base::SharedMemory shm_;
  43   uint32_t size_;
  44   int map_count_;
  45
  46   DISALLOW_COPY_AND_ASSIGN(Buffer);
  47 };
  48
  49 class PPB_Buffer_Proxy : public InterfaceProxy {
  50  public:
  51   explicit PPB_Buffer_Proxy(Dispatcher* dispatcher);
  52   virtual ~PPB_Buffer_Proxy();
  53
  54   static PP_Resource CreateProxyResource(PP_Instance instance,
  55                                          uint32_t size);
  56   static PP_Resource AddProxyResource(const HostResource& resource,
  57                                       base::SharedMemoryHandle shm_handle,
  58                                       uint32_t size);
  59
  60   // InterfaceProxy implementation.
  61   virtual bool OnMessageReceived(const IPC::Message& msg);
  62
  63   static const ApiID kApiID = API_ID_PPB_BUFFER;
  64
  65  private:
  66   // Message handlers.
  67   void OnMsgCreate(PP_Instance instance,
  68                    uint32_t size,
  69                    HostResource* result_resource,
  70                    ppapi::proxy::SerializedHandle* result_shm_handle);
  71 };
  72
  73 }  // namespace proxy
  74 }  // namespace ppapi
  75
  76 #endif  // PPAPI_PROXY_PPB_BUFFER_PROXY_H_