ACE/ace/Dynamic_Service_Base.h

   1 /* -*- C++ -*- */
   2
   3 //=============================================================================
   4 /**
   5  *  @file Dynamic_Service_Base.h
   6  *
   7  *  @author Prashant Jain <pjain@cs.wustl.edu>
   8  *  @author Douglas C. Schmidt <d.schmidt@vanderbilt.edu>
   9  */
  10 //=============================================================================
  11
  12 #ifndef ACE_DYNAMIC_SERVICE_BASE_H
  13 #define ACE_DYNAMIC_SERVICE_BASE_H
  14
  15 #include /**/ "ace/pre.h"
  16
  17 #include /**/ "ace/ACE_export.h"
  18
  19 #if !defined (ACE_LACKS_PRAGMA_ONCE)
  20 # pragma once
  21 #endif /* ACE_LACKS_PRAGMA_ONCE */
  22
  23 ACE_BEGIN_VERSIONED_NAMESPACE_DECL
  24
  25 class ACE_Service_Gestalt;
  26 class ACE_Service_Type;
  27
  28 /**
  29  * @class ACE_Dynamic_Service_Base
  30  *
  31  * @brief Base class for all ACE_Dynamic_Service instantiations.
  32  *
  33  * Factors out common code shared by all ACE_Dynamic_Service
  34  * instantiations, this avoid code bloat.
  35  */
  36 class ACE_Export ACE_Dynamic_Service_Base
  37 {
  38 public:
  39   /// Dump the current static of the object
  40   void dump () const;
  41
  42 protected:
  43   /// Perform the default repo search, but optionally skip searching the global
  44   /// repo.
  45   static void* instance (const ACE_TCHAR *name, bool no_global = false);
  46
  47   static void* instance (const ACE_Service_Gestalt* repo,
  48                          const ACE_TCHAR *name,
  49                          bool no_global = false);
  50
  51   /// No need to create, or assign instances of this class
  52   ACE_Dynamic_Service_Base ();
  53   ~ACE_Dynamic_Service_Base ();
  54   const ACE_Dynamic_Service_Base& operator= (const ACE_Dynamic_Service_Base&);
  55
  56 private:
  57   /// Implement the service search policy, i.e. "look for the service first
  58   /// locally and then globally"
  59   static const ACE_Service_Type *find_i (const ACE_Service_Gestalt* &repo,
  60                                          const ACE_TCHAR *name,
  61                                          bool no_global);
  62
  63   /// The dependency declaration class needs access to the service search
  64   /// policy, implemented by find_i()
  65   friend class ACE_Dynamic_Service_Dependency;
  66 };
  67
  68 ACE_END_VERSIONED_NAMESPACE_DECL
  69
  70 #include /**/ "ace/post.h"
  71 #endif /* ACE_DYNAMIC_SERVICE_BASE_H */