TAO/examples/Callback_Quoter/Consumer_Signal_Handler.h

   1 /* -*- C++ -*- */
   2
   3 //=============================================================================
   4 /**
   5  *  @file    Consumer_Signal_Handler.h
   6  *
   7  *  Definition of the Consumer_Signal_Handler class.
   8  *
   9  *  @author Kirthika Parameswaran <kirthika@cs.wustl.edu>
  10  */
  11 //=============================================================================
  12
  13
  14 #ifndef CONSUMER_SIGNAL_HANDLER_H
  15 #define CONSUMER_SIGNAL_HANDLER_H
  16
  17 #include "ace/Reactor.h"
  18 #include "ace/Event_Handler.h"
  19 #include "Consumer_Handler.h"
  20
  21 class Consumer_Handler;
  22
  23 /**
  24  * @class Consumer_Signal_Handler
  25  *
  26  * @brief Creating a class to handle signal events.
  27  *
  28  * Since only signals need to be handled, only the <handle_signal> method
  29  * is overlaoded.
  30  */
  31 class Consumer_Signal_Handler : public ACE_Event_Handler
  32 {
  33 public:
  34
  35   /// The consumer_handler refernce will be used to access the servant
  36   /// methods.
  37   Consumer_Signal_Handler (Consumer_Handler *consumer_handler);
  38
  39   /// This method takes action on an signal event.
  40   int handle_signal (int signum,
  41                      siginfo_t*,
  42                      ucontext_t*);
  43
  44   /**
  45    * For removal of the signal handler from the dispatch tables.  When
  46    * the handle_signal () returns < 0 this method will be executed
  47    * automatically.
  48    */
  49   int handle_close (ACE_HANDLE handle,
  50                     ACE_Reactor_Mask close_mask);
  51
  52 protected:
  53   /// Protected destructor so that the signal handler is always created
  54   /// dynamically and hence the heap doesnt get corrupted.
  55   ~Consumer_Signal_Handler (void);
  56
  57 private:
  58   /// Exit gracefully on a signal.
  59   int quit_on_signal (void);
  60
  61   /// Reference to the Consumer_Handler which is used in accessing the
  62   /// servant methods.
  63   Consumer_Handler *consumer_handler_;
  64 };
  65
  66 #endif /* CONSUMER_SIGNAL_HANDLER_H */