ppapi/proxy/plugin_array_buffer_var.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_PLUGIN_ARRAY_BUFFER_VAR_H_
   6 #define PPAPI_PROXY_PLUGIN_ARRAY_BUFFER_VAR_H_
   7
   8 #include <vector>
   9
  10 #include "base/basictypes.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/memory/shared_memory.h"
  13 #include "ppapi/c/pp_instance.h"
  14 #include "ppapi/c/pp_stdint.h"
  15 #include "ppapi/shared_impl/var.h"
  16
  17 namespace ppapi {
  18
  19 // Represents a plugin-side ArrayBufferVar. In the plugin process, it's
  20 // owned as a vector.
  21 class PluginArrayBufferVar : public ArrayBufferVar {
  22  public:
  23   explicit PluginArrayBufferVar(uint32 size_in_bytes);
  24   PluginArrayBufferVar(uint32 size_in_bytes,
  25                        base::SharedMemoryHandle plugin_handle);
  26   ~PluginArrayBufferVar() override;
  27
  28   // ArrayBufferVar implementation.
  29   void* Map() override;
  30   void Unmap() override;
  31   uint32 ByteLength() override;
  32   bool CopyToNewShmem(
  33       PP_Instance instance,
  34       int* host_handle,
  35       base::SharedMemoryHandle* plugin_handle) override;
  36
  37  private:
  38   // Non-shared memory
  39   std::vector<uint8> buffer_;
  40
  41   // Shared memory
  42   base::SharedMemoryHandle plugin_handle_;
  43   scoped_ptr<base::SharedMemory> shmem_;
  44   uint32 size_in_bytes_;
  45
  46   DISALLOW_COPY_AND_ASSIGN(PluginArrayBufferVar);
  47 };
  48
  49 }  // namespace ppapi
  50
  51 #endif  // PPAPI_PROXY_PLUGIN_ARRAY_BUFFER_VAR_H_