TAO/tao/RTCORBA/Multi_Priority_Mapping.h

   1 // -*- C++ -*-
   2
   3
   4 //=============================================================================
   5 /**
   6  *  @file   Multi_Priority_Mapping.h
   7  *
   8  * Declares a priority mapping to support cross platform communication.
   9  *
  10  *  @author Brian Mendel (brian.r.mendel@boeing.com)
  11  */
  12 //=============================================================================
  13
  14
  15 #ifndef TAO_MULTI_PRIORITY_MAPPING_H
  16 #define TAO_MULTI_PRIORITY_MAPPING_H
  17
  18 #include "tao/orbconf.h"
  19
  20 #if !defined (ACE_LACKS_PRAGMA_ONCE)
  21 # pragma once
  22 #endif /* ACE_LACKS_PRAGMA_ONCE */
  23
  24 #if defined (TAO_HAS_CORBA_MESSAGING) && TAO_HAS_CORBA_MESSAGING != 0
  25
  26 #include "tao/RTCORBA/Priority_Mapping.h"
  27
  28 TAO_BEGIN_VERSIONED_NAMESPACE_DECL
  29
  30 /**
  31  * @class TAO_Multi_Priority_Mapping
  32  *
  33  * @brief An implementation of the Priority_Mapping interface for communication
  34  * between different platforms
  35  *
  36  * This implementation uses a custom mapping between the range of
  37  * priorities for a given scheduling class (ACE_SCHED_OTHER,
  38  * ACE_SCHED_FIFO, ACE_SCHED_RR) and the valid range of CORBA
  39  * priorities (0...32767)
  40  */
  41 class TAO_RTCORBA_Export TAO_Multi_Priority_Mapping
  42 : public TAO_Priority_Mapping
  43 {
  44 public:
  45   /// Default constructor
  46   /**
  47    * @param base_native_priority The native priority to use for the highest
  48    * priority endpoint.
  49    * @param base_corba_priority The corba priority to use for the highest
  50    * priority endpoint
  51    * @param priority_spacing The priority increment to use between endpoints
  52    * @param priorities_contiguous Some platforms do use contiguous priorities
  53    * @param policy The scheduling policy to use.
  54    */
  55   TAO_Multi_Priority_Mapping (int base_native_priority,
  56                               int base_corba_priority,
  57                               int priority_spacing = 1,
  58                               int priorities_contiguous = 1,
  59                               int policy = ACE_SCHED_FIFO);
  60
  61   /// The destructor
  62   virtual ~TAO_Multi_Priority_Mapping ();
  63
  64   virtual CORBA::Boolean
  65       to_native (RTCORBA::Priority corba_priority,
  66                  RTCORBA::NativePriority &native_priority);
  67   virtual CORBA::Boolean
  68       to_CORBA (RTCORBA::NativePriority native_priority,
  69                 RTCORBA::Priority &corba_priority);
  70
  71 private:
  72   /// The base settings
  73   int base_native_priority_;
  74   int base_corba_priority_;
  75
  76   const int priority_spacing_;
  77   const int priorities_contiguous_;
  78
  79   /// The scheduling policy
  80   int policy_;
  81
  82   /// The range
  83   int const min_;
  84   int const max_;
  85 };
  86
  87 TAO_END_VERSIONED_NAMESPACE_DECL
  88
  89 #endif /* TAO_HAS_CORBA_MESSAGING && TAO_HAS_CORBA_MESSAGING != 0 */
  90
  91 #endif /* TAO_MULTI_PRIORITY_MAPPING_H */