TAO/tao/Transport_Selection_Guard.cpp

   1 // -*- C++ -*-
   2 #include "tao/Transport_Selection_Guard.h"
   3 #include "tao/TSS_Resources.h"
   4
   5 TAO_BEGIN_VERSIONED_NAMESPACE_DECL
   6
   7 namespace TAO
   8 {
   9   Transport_Selection_Guard*
  10   Transport_Selection_Guard::current (TAO_ORB_Core* core, size_t tss_slot_id)
  11   {
  12     // @NOTE: (Iliyan) Started making this method aware of the core
  13     // and the tss slot that correspond to the "current" transport,
  14     // influenced by a general design preference to keep things
  15     // local. The idea was to make the current TSG part of the TSS
  16     // storage for a specific ORB Core, as opposed to using the global
  17     // TSS Resources. However, it really doesn't offer any benefit to
  18     // store a Transport pointer locally, for each ORB. There is
  19     // always only one current Transport per thread. Period. The
  20     // number of ORB Core instances in existence does not change that
  21     // fact, so keeping a separate pointer would have been an
  22     // over-kill.
  23     ACE_UNUSED_ARG (core);
  24     ACE_UNUSED_ARG (tss_slot_id);
  25
  26 #if TAO_HAS_TRANSPORT_CURRENT == 1
  27     return TAO_TSS_Resources::instance ()->tsg_;
  28 #else  /* TAO_HAS_TRANSPORT_CURRENT != 1 */
  29     return 0;
  30 #endif  /* TAO_HAS_TRANSPORT_CURRENT == 1 */
  31   }
  32
  33   /// Ctor
  34   Transport_Selection_Guard::Transport_Selection_Guard (TAO_Transport* t)
  35     :
  36 #if TAO_HAS_TRANSPORT_CURRENT == 1
  37     prev_ (TAO_TSS_Resources::instance ()->tsg_) ,
  38 #endif  /* TAO_HAS_TRANSPORT_CURRENT == 1 */
  39     curr_ (t)
  40   {
  41 #if TAO_HAS_TRANSPORT_CURRENT == 1
  42     TAO_TSS_Resources::instance ()->tsg_ = this;
  43 #endif  /* TAO_HAS_TRANSPORT_CURRENT == 1 */
  44   }
  45
  46   /// Dtor
  47   Transport_Selection_Guard::~Transport_Selection_Guard ()
  48   {
  49 #if TAO_HAS_TRANSPORT_CURRENT == 1
  50     TAO_TSS_Resources::instance ()->tsg_ = prev_;
  51     this->prev_ = nullptr;
  52 #endif  /* TAO_HAS_TRANSPORT_CURRENT == 1 */
  53     this->curr_ = nullptr;
  54   }
  55
  56   bool
  57   operator== (const Transport_Selection_Guard& lhs,
  58               const TAO_Transport* rhs)
  59   {
  60     return lhs.curr_ == rhs;
  61   }
  62
  63   bool
  64   operator== (const TAO_Transport* lhs,
  65               const Transport_Selection_Guard& rhs)
  66   {
  67     return lhs == rhs.curr_;
  68   }
  69
  70   bool
  71   operator!= (const Transport_Selection_Guard& lhs,
  72               const TAO_Transport* rhs)
  73   {
  74     return lhs.curr_ != rhs;
  75   }
  76
  77   bool
  78   operator!= (const TAO_Transport* lhs,
  79               const Transport_Selection_Guard& rhs)
  80   {
  81     return lhs != rhs.curr_;
  82   }
  83 } /* namespace TAO */
  84
  85 TAO_END_VERSIONED_NAMESPACE_DECL