TAO/tao/Nested_Upcall_Guard.h

   1 // -*- C++ -*-
   2
   3 //=============================================================================
   4 /**
   5  *  @file    Nested_Upcall_Guard.h
   6  *
   7  *  @author  Chris Cleeland <cleeland@ociweb.com>
   8  */
   9 //=============================================================================
  10
  11
  12 #ifndef TAO_NESTED_UPCALL_GUARD_H
  13 #define TAO_NESTED_UPCALL_GUARD_H
  14
  15 #include /**/ "ace/pre.h"
  16
  17 #if !defined (ACE_LACKS_PRAGMA_ONCE)
  18 # pragma once
  19 #endif /* ACE_LACKS_PRAGMA_ONCE */
  20
  21 #include "tao/Transport.h"
  22 #include "tao/ORB_Core.h"
  23 #include "tao/ORB_Core_TSS_Resources.h"
  24 #include "tao/debug.h"
  25
  26 TAO_BEGIN_VERSIONED_NAMESPACE_DECL
  27 namespace TAO
  28 {
  29   /**
  30    * @class Nested_Upcall_Guard
  31    *
  32    * @brief: Magic class that sets the status of the thread in the
  33    * TSS.
  34    *
  35    * This class was originally internal to the Wait_On_LF_NoUpcall
  36    * implementation, but now it needs to be shared with the LF
  37    * Connect wait as well.
  38    */
  39   class Nested_Upcall_Guard
  40   {
  41   public:
  42     // Maybe we should instead just take in a ptr to
  43     // TAO_ORB_Core_TSS_Resources?  Or at least ORB_Core*?
  44     explicit Nested_Upcall_Guard (TAO_Transport *t, bool enable=true)
  45       : t_ (t),
  46         enable_ (enable)
  47     {
  48       if (!this->enable_)
  49         {
  50           return;
  51         }
  52
  53       TAO_ORB_Core_TSS_Resources *tss =
  54         t_->orb_core ()->get_tss_resources ();
  55
  56       tss->upcalls_temporarily_suspended_on_this_thread_ = true;
  57
  58       if (TAO_debug_level > 6)
  59         TAOLIB_DEBUG ((LM_DEBUG,
  60                     "TAO (%P|%t) - Wait_On_LF_No_Upcall[%d]::wait, "
  61                     "disabling upcalls\n", t->id ()));
  62     }
  63
  64     ~Nested_Upcall_Guard ()
  65     {
  66       if (!this->enable_)
  67         {
  68           return;
  69         }
  70
  71       TAO_ORB_Core_TSS_Resources *tss =
  72         this->t_->orb_core ()->get_tss_resources ();
  73
  74       tss->upcalls_temporarily_suspended_on_this_thread_ = false;
  75
  76       if (TAO_debug_level > 6)
  77         {
  78           TAOLIB_DEBUG ((LM_DEBUG,
  79                       "TAO (%P|%t) - Wait_On_LF_No_Upcall[%d]::wait, "
  80                       "re-enabling upcalls\n", this->t_->id ()));
  81         }
  82     }
  83
  84   private:
  85     Nested_Upcall_Guard ();
  86
  87     Nested_Upcall_Guard (const Nested_Upcall_Guard&) = delete;
  88     Nested_Upcall_Guard &operator= (const Nested_Upcall_Guard&) = delete;
  89     Nested_Upcall_Guard (Nested_Upcall_Guard&&) = delete;
  90     Nested_Upcall_Guard &operator= (Nested_Upcall_Guard&&) = delete;
  91
  92   private:
  93     /// Pointer to the transport that we plan to use.
  94     TAO_Transport *t_;
  95
  96     /// A flag to support conditional waiting in the LF_Connect_Strategy
  97     bool enable_;
  98   };
  99 }
 100
 101 TAO_END_VERSIONED_NAMESPACE_DECL
 102
 103 #include /**/ "ace/post.h"
 104
 105 #endif /* TAO_NESTED_UPCALL_GUARD_H */