TAO/tests/File_IO/File_i.h

   1
   2 //=============================================================================
   3 /**
   4  *  @file     File_i.h
   5  *
   6  *    Defines the implementation classes for the File IDL
   7  *   module
   8  *
   9  *  @author  Irfan Pyarali
  10  */
  11 //=============================================================================
  12
  13
  14 #include "FileS.h"
  15
  16 /**
  17  * @class FileImpl
  18  *
  19  * @brief FileImpl class provides the namespace for the File IDL module .
  20  */
  21 class FileImpl
  22 {
  23 public:
  24   /**
  25    * @class Descriptor
  26    *
  27    * @brief Descriptor implements the Descriptor interface in the File
  28    * Module A single Descriptor servant can serve multiple object
  29    * references
  30    */
  31   class Descriptor : public POA_File::Descriptor
  32   {
  33   public:
  34     /// Constructor
  35     Descriptor (PortableServer::POA_ptr poa);
  36
  37     /// Destructor
  38     ~Descriptor (void);
  39
  40     /// Returns the default POA of this object
  41     PortableServer::POA_ptr _default_POA (void);
  42
  43     /// write buffer to File corresponding to this Descriptor
  44     virtual CORBA::Long write (const File::Descriptor::DataBuffer &buffer);
  45
  46     virtual File::Descriptor::DataBuffer *read (CORBA::Long num_bytes);
  47
  48     /// seek to the offset in file from whence
  49     virtual CORBA::ULong lseek (CORBA::ULong offset,
  50                                 CORBA::Long whence);
  51
  52     /// closes the file corresponding to the requested ObjectID
  53     virtual void destroy (void);
  54
  55   private:
  56
  57     /// Extracts the ACE_HANDLE from the objectID
  58     ACE_HANDLE fd (void);
  59
  60     PortableServer::POA_var poa_;
  61   };
  62
  63   /**
  64    * @class System
  65    *
  66    * @brief File System implementation class.
  67    */
  68   class System : public POA_File::System
  69   {
  70   public:
  71     /// Constructor, Creates a single File Descriptor Servant and
  72     /// registers it with the POA as the Default Servant
  73     System (PortableServer::POA_ptr poa);
  74
  75     ///Destructor
  76     ~System (void);
  77
  78     ///Returns the default POA of this object
  79     PortableServer::POA_ptr _default_POA (void);
  80
  81     /// Opens a file ,creates a Descriptor reference with the
  82     /// ACE_HANDLE and returns that reference
  83     File::Descriptor_ptr open (const char *file_name,
  84                                CORBA::Long flags);
  85
  86   private:
  87     PortableServer::POA_var poa_;
  88
  89     /// The single File Descriptor servant which serves requests for
  90     /// any Descriptor object under poa_.
  91     Descriptor fd_servant_;
  92   };
  93 };