TAO/tao/RTCORBA/Continuous_Priority_Mapping.h

   1 // -*- C++ -*-
   2
   3 //=============================================================================
   4 /**
   5  *  @file    Continuous_Priority_Mapping.h
   6  *
   7  *  @author Irfan Pyarali
   8  */
   9 // ===================================================================
  10
  11 #ifndef TAO_CONTINUOUS_PRIORITY_MAPPING_H
  12 #define TAO_CONTINUOUS_PRIORITY_MAPPING_H
  13
  14 #include /**/ "ace/pre.h"
  15
  16 #include "tao/orbconf.h"
  17
  18 #if !defined (ACE_LACKS_PRAGMA_ONCE)
  19 # pragma once
  20 #endif /* ACE_LACKS_PRAGMA_ONCE */
  21
  22 #if defined (TAO_HAS_CORBA_MESSAGING) && TAO_HAS_CORBA_MESSAGING != 0
  23
  24 #include "tao/RTCORBA/rtcorba_export.h"
  25 #include "tao/RTCORBA/Priority_Mapping.h"
  26
  27 TAO_BEGIN_VERSIONED_NAMESPACE_DECL
  28
  29 /**
  30  * @class TAO_Continuous_Priority_Mapping
  31  *
  32  * @brief Maps the first n CORBA priorities to the range of native
  33  * priorities, where n is the number of native priorities.
  34  *
  35  * The lowest native priority is mapped to CORBA priority 0, next
  36  * higher native priority is mapped to CORBA priority 1, and so
  37  * on. Since in all the operating systems where TAO is supported the
  38  * native priority set contains less than 32767 priorities, part of
  39  * the CORBA priority range is left unused.  Consider NT as an
  40  * example. NT native priorities -15 -2 -1 0 1 2 15 are mapped to
  41  * CORBA priorities 0 1 2 3 4 5 6, respectively, and the rest of the
  42  * CORBA priority range is not used.
  43  *
  44  * This class was previously called Direct_Priority_Mapping.
  45  *
  46  * \nosubgrouping
  47  **/
  48 class TAO_RTCORBA_Export TAO_Continuous_Priority_Mapping
  49   : public TAO_Priority_Mapping
  50 {
  51 public:
  52   /// Constructor.
  53   TAO_Continuous_Priority_Mapping (int policy = ACE_SCHED_OTHER);
  54
  55   /// Destructor.
  56   ~TAO_Continuous_Priority_Mapping ();
  57
  58   /// Convert CORBA priority to native priority.
  59   CORBA::Boolean to_native (RTCORBA::Priority corba_priority,
  60                             RTCORBA::NativePriority &native_priority);
  61
  62   /// Convert native priority to CORBA priority.
  63   CORBA::Boolean to_CORBA (RTCORBA::NativePriority native_priority,
  64                            RTCORBA::Priority &corba_priority);
  65
  66 private:
  67   int policy_;
  68   int min_;
  69   int max_;
  70 };
  71
  72 TAO_END_VERSIONED_NAMESPACE_DECL
  73
  74 #endif /* TAO_HAS_CORBA_MESSAGING && TAO_HAS_CORBA_MESSAGING != 0 */
  75
  76 #include /**/ "ace/post.h"
  77
  78 #endif /* TAO_CONTINUOUS_PRIORITY_MAPPING_H */