ppapi/cpp/dev/buffer_dev.h

   1 // Copyright (c) 2011 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_CPP_DEV_BUFFER_DEV_H_
   6 #define PPAPI_CPP_DEV_BUFFER_DEV_H_
   7
   8 #include "ppapi/cpp/resource.h"
   9
  10 namespace pp {
  11
  12 class InstanceHandle;
  13
  14 class Buffer_Dev : public Resource {
  15  public:
  16   // Creates an is_null() Buffer object.
  17   Buffer_Dev();
  18   Buffer_Dev(const Buffer_Dev& other);
  19   explicit Buffer_Dev(PP_Resource resource);
  20
  21   // Creates & Maps a new Buffer in the browser with the given size. The
  22   // resulting object will be is_null() if either Create() or Map() fails.
  23   Buffer_Dev(const InstanceHandle& instance, uint32_t size);
  24
  25   // Constructor used when the buffer resource already has a reference count
  26   // assigned. No additional reference is taken.
  27   Buffer_Dev(PassRef, PP_Resource resource);
  28
  29   // Unmap the underlying shared memory.
  30   virtual ~Buffer_Dev();
  31
  32   Buffer_Dev& operator=(const Buffer_Dev& rhs);
  33
  34   uint32_t size() const { return size_; }
  35   void* data() const { return data_; }
  36
  37  private:
  38   void Init();
  39
  40   void* data_;
  41   uint32_t size_;
  42 };
  43
  44 }  // namespace pp
  45
  46 #endif  // PPAPI_CPP_DEV_BUFFER_DEV_H_