native_client_sdk/src/libraries/nacl_io/pepper_interface_delegate.h

   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 LIBRARIES_NACL_IO_PEPPER_INTERFACE_DELEGATE_H_
   6 #define LIBRARIES_NACL_IO_PEPPER_INTERFACE_DELEGATE_H_
   7
   8 #include "nacl_io/pepper_interface.h"
   9
  10 // This class allows you to delegate Interface requests to different
  11 // PepperInterface-derived classes.
  12 //
  13 // For example:
  14 //  class FooPepperInterface : public PepperInterface {
  15 //    ...
  16 //    CoreInterface* GetCoreInterface() { ... };
  17 //    ...
  18 //  };
  19 //
  20 //  class BarPepperInterface : public PepperInterface {
  21 //    ...
  22 //    VarInterface* GetVarInterface() { ... };
  23 //    ...
  24 //  };
  25 //
  26 //  void SomeFunction() {
  27 //    FooPepperInterface foo;
  28 //    BarPepperInterface bar;
  29 //    PepperInterfaceDelegate delegate(pp_instance);
  30 //    delegate.SetCoreInterface(foo.GetCoreInterface());
  31 //    delegate.SetVarInterface(bar.GetVarInterface());
  32 //    ...
  33 //  }
  34
  35 namespace nacl_io {
  36
  37 class PepperInterfaceDelegate : public PepperInterface {
  38  public:
  39   explicit PepperInterfaceDelegate(PP_Instance instance);
  40   virtual ~PepperInterfaceDelegate();
  41   virtual PP_Instance GetInstance();
  42
  43 // Interface getters.
  44 //
  45 // These declarations look like:
  46 //
  47 //   CoreInterface* GetCoreInterface();
  48 //
  49 #include "nacl_io/pepper/undef_macros.h"
  50 #include "nacl_io/pepper/define_empty_macros.h"
  51 #undef BEGIN_INTERFACE
  52 #define BEGIN_INTERFACE(BaseClass, PPInterface, InterfaceString) \
  53   virtual BaseClass* Get##BaseClass();
  54 #include "nacl_io/pepper/all_interfaces.h"
  55
  56 // Interface delegate setters.
  57 //
  58 // These declarations look like:
  59 //
  60 //   void SetCoreInterface(CoreInterface* delegate);
  61 //
  62 #include "nacl_io/pepper/undef_macros.h"
  63 #include "nacl_io/pepper/define_empty_macros.h"
  64 #undef BEGIN_INTERFACE
  65 #define BEGIN_INTERFACE(BaseClass, PPInterface, InterfaceString) \
  66   void Set##BaseClass##Delegate(BaseClass* delegate);
  67 #include "nacl_io/pepper/all_interfaces.h"
  68
  69  private:
  70   PP_Instance instance_;
  71 // Interface delegate pointers.
  72 #include "nacl_io/pepper/undef_macros.h"
  73 #include "nacl_io/pepper/define_empty_macros.h"
  74 #undef BEGIN_INTERFACE
  75 #define BEGIN_INTERFACE(BaseClass, PPInterface, InterfaceString) \
  76   BaseClass* BaseClass##delegate_;
  77 #include "nacl_io/pepper/all_interfaces.h"
  78 };
  79
  80 }  // namespace nacl_io
  81
  82 #endif  // LIBRARIES_NACL_IO_PEPPER_INTERFACE_DELEGATE_H_