TAO/tao/LF_Follower.h

   1 // -*- C++ -*-
   2
   3 //=============================================================================
   4 /**
   5  *  @file LF_Follower.h
   6  *
   7  *  @author Carlos O'Ryan <coryan@uci.edu>
   8  */
   9 //=============================================================================
  10
  11 #ifndef TAO_LF_FOLLOWER_H
  12 #define TAO_LF_FOLLOWER_H
  13
  14 #include /**/ "ace/pre.h"
  15
  16 #include /**/ "tao/TAO_Export.h"
  17
  18 #if !defined (ACE_LACKS_PRAGMA_ONCE)
  19 # pragma once
  20 #endif /* ACE_LACKS_PRAGMA_ONCE */
  21
  22 #include /**/ "tao/Versioned_Namespace.h"
  23
  24 #include "ace/Condition_Thread_Mutex.h"
  25 #include "ace/Synch_Traits.h"
  26 #include "ace/Intrusive_List_Node.h"
  27
  28
  29 TAO_BEGIN_VERSIONED_NAMESPACE_DECL
  30
  31 class TAO_Leader_Follower;
  32
  33 /**
  34  * @class TAO_LF_Follower
  35  *
  36  * @brief Represent a thread blocked, as a follower, in the
  37  *        Leader/Followers set.
  38  *
  39  * @todo Currently this class offers little abstraction, the follower
  40  * loop should be implemented by this class.
  41  */
  42 class TAO_Export TAO_LF_Follower
  43   : public ACE_Intrusive_List_Node<TAO_LF_Follower>
  44 {
  45 public:
  46   /// Constructor
  47   TAO_LF_Follower (TAO_Leader_Follower &leader_follower);
  48
  49   /// Destructor
  50   ~TAO_LF_Follower ();
  51
  52   /// Access the leader follower that owns this follower
  53   TAO_Leader_Follower &leader_follower ();
  54
  55   /// Wait until on the underlying condition variable
  56   int wait (ACE_Time_Value *tv);
  57
  58   /// Signal the underlying condition variable
  59   int signal ();
  60
  61 private:
  62   /// The Leader/Follower set this Follower belongs to
  63   TAO_Leader_Follower &leader_follower_;
  64
  65   /// Condition variable used to
  66   ACE_SYNCH_CONDITION condition_;
  67 };
  68
  69 TAO_END_VERSIONED_NAMESPACE_DECL
  70
  71 #if defined (__ACE_INLINE__)
  72 # include "tao/LF_Follower.inl"
  73 #endif /* __ACE_INLINE__ */
  74
  75 #include /**/ "ace/post.h"
  76
  77 #endif  /* TAO_LF_FOLLOWER_H */