ACE/examples/Smart_Pointers/Widget_Impl.cpp

   1 /* -*- C++ -*- */
   2 //=============================================================================
   3 /**
   4  *  @file    Widget_Impl.cpp
   5  *
   6  *  @author Christopher Kohlhoff <chris@kohlhoff.com>
   7  */
   8 //=============================================================================
   9
  10 #include "Widget_Impl.h"
  11 #include "ace/Log_Msg.h"
  12
  13 Widget_Impl::Widget_Impl ()
  14 {
  15   ACE_DEBUG ((LM_DEBUG, "Widget_Impl constructor\n"));
  16 }
  17
  18 Widget_Impl::~Widget_Impl ()
  19 {
  20   ACE_DEBUG ((LM_DEBUG, "Widget_Impl destructor\n"));
  21 }
  22
  23 void Widget_Impl::add_part (Widget_Part *part)
  24 {
  25   // Take ownership of the part object using a ACE_Refcounted_Auto_Ptr.
  26   ACE_Refcounted_Auto_Ptr<Widget_Part, ACE_SYNCH_MUTEX> new_part (part);
  27
  28   parts_.enqueue_tail (new_part);
  29 }
  30
  31 Widget_Part *Widget_Impl::remove_part ()
  32 {
  33   ACE_Refcounted_Auto_Ptr<Widget_Part, ACE_SYNCH_MUTEX> removed_part;
  34   if (parts_.dequeue_head (removed_part) == -1)
  35     return 0;
  36
  37   // Ownership of the part object is released and transferred to the caller.
  38   return removed_part.release();
  39 }
  40
  41 void Widget_Impl::list_parts ()
  42 {
  43   ACE_Unbounded_Queue_Iterator<ACE_Refcounted_Auto_Ptr<Widget_Part, ACE_SYNCH_MUTEX> > iter (parts_);
  44   ACE_Refcounted_Auto_Ptr<Widget_Part, ACE_SYNCH_MUTEX> *current_part;
  45   while (iter.next (current_part))
  46     {
  47       (*current_part)->print_info ();
  48       iter.advance ();
  49     }
  50 }