1 files changed, 68 insertions, 0 deletions
diff --git a/ACE/examples/Smart_Pointers/Gadget_Part_Impl.cpp b/ACE/examples/Smart_Pointers/Gadget_Part_Impl.cpp
new file mode 100644
index 00000000000..472e6d3e859
--- /dev/null
+++ b/ACE/examples/Smart_Pointers/Gadget_Part_Impl.cpp
@@ -0,0 +1,68 @@
+/* -*- C++ -*- */
+//=============================================================================
+/**
+ *  @file    Gadget_Part_Impl.cpp
+ *
+ *  $Id$
+ *
+ *  @author Christopher Kohlhoff <chris@kohlhoff.com>
+ */
+//=============================================================================
+
+#include "Gadget_Part_Impl.h"
+#include "ace/ACE.h"
+#include "ace/Log_Msg.h"
+#include "ace/Unbounded_Queue.h"
+
+Gadget_Part_Impl::Gadget_Part_Impl (Gadget_ptr owner,
+                                    const char* name,
+                                    int size)
+  : owner_ (owner),
+    name_ (ACE::strnew (name)),
+    size_ (size)
+{
+  ACE_DEBUG ((LM_DEBUG, "Gadget_Part_Impl constructor\n"));
+}
+
+Gadget_Part_Impl::~Gadget_Part_Impl (void)
+{
+  ACE_DEBUG ((LM_DEBUG, "Gadget_Part_Impl destructor\n"));
+
+  delete [] name_;
+}
+
+void Gadget_Part_Impl::print_info (void)
+{
+  ACE_DEBUG ((LM_INFO, "Gadget part: name=%s size=%d\n", name_, size_));
+}
+
+void Gadget_Part_Impl::remove_from_owner (void)
+{
+  // Need to guarantee the existence of the owner for the duration of this call.
+  Gadget_var owner = owner_;
+
+  // Weak pointers are automatically set to NULL if the object they refer to
+  // is deleted. We can use this fact to check that our owner still exists.
+  if (owner == 0)
+    return;
+
+  // Take all existing parts from the owner and build up a temporary list. If
+  // we find ourselves then we won't add ourselves to the list.
+  ACE_Unbounded_Queue<Gadget_Part_var> parts;
+  for (;;)
+    {
+      Gadget_Part_var part = owner->remove_part ();
+      if (part == 0)
+        break;
+      if (part != this)
+        parts.enqueue_tail (part);
+    }
+
+  // Add the remaining parts back to the gadget.
+  while (!parts.is_empty ())
+    {
+      Gadget_Part_var part;
+      parts.dequeue_head (part);
+      owner->add_part (part);
+    }
+}