Initial Mangos Three Commit

dep/acelite/ace/Notification_Queue.cpp

@@ -0,0 +1,225 @@
+#include "ace/Notification_Queue.h"
+
+#if !defined (__ACE_INLINE__)
+#include "ace/Notification_Queue.inl"
+#endif /* __ACE_INLINE__ */
+
+#include "ace/Guard_T.h"
+
+ACE_BEGIN_VERSIONED_NAMESPACE_DECL
+
+ACE_ALLOC_HOOK_DEFINE(ACE_Notification_Queue_Node)
+
+ACE_Notification_Queue::
+ACE_Notification_Queue()
+  : ACE_Copy_Disabled()
+  , alloc_queue_()
+  , notify_queue_()
+  , free_queue_()
+{
+}
+
+ACE_Notification_Queue::
+~ACE_Notification_Queue()
+{
+  reset();
+}
+
+int
+ACE_Notification_Queue::open()
+{
+  ACE_TRACE ("ACE_Notification_Queue::open");
+
+  ACE_GUARD_RETURN (ACE_SYNCH_MUTEX, mon, this->notify_queue_lock_, -1);
+
+  if (!this->free_queue_.is_empty ())
+    return 0;
+
+  return allocate_more_buffers();
+}
+
+void
+ACE_Notification_Queue::reset()
+{
+  ACE_TRACE ("ACE_Notification_Queue::reset");
+
+  // Release all the event handlers still in the queue ...
+  for (ACE_Notification_Queue_Node * node = notify_queue_.head();
+       node != 0;
+       node = node->next())
+    {
+      if (node->get().eh_ == 0)
+        {
+          continue;
+        }
+      (void) node->get().eh_->remove_reference();
+    }
+
+  // ... free up the dynamically allocated resources ...
+  ACE_Notification_Queue_Node **b = 0;
+  for (ACE_Unbounded_Queue_Iterator<ACE_Notification_Queue_Node *> alloc_iter (this->alloc_queue_);
+       alloc_iter.next (b) != 0;
+       alloc_iter.advance ())
+    {
+      delete [] *b;
+      *b = 0;
+    }
+
+  // ... cleanup the list of allocated blocks ...
+  this->alloc_queue_.reset ();
+
+  // ... swap with empty lists to reset the contents ...
+  Buffer_List().swap(notify_queue_);
+  Buffer_List().swap(free_queue_);
+}
+
+int
+ACE_Notification_Queue::allocate_more_buffers()
+{
+  ACE_TRACE ("ACE_Notification_Queue::allocate_more_buffers");
+
+  ACE_Notification_Queue_Node *temp = 0;
+
+  ACE_NEW_RETURN (temp,
+                  ACE_Notification_Queue_Node[ACE_REACTOR_NOTIFICATION_ARRAY_SIZE],
+                  -1);
+
+  if (this->alloc_queue_.enqueue_head (temp) == -1)
+    {
+      delete [] temp;
+      return -1;
+    }
+
+  for (size_t i = 0; i < ACE_REACTOR_NOTIFICATION_ARRAY_SIZE; ++i)
+    {
+      free_queue_.push_front(temp + i);
+    }
+
+  return 0;
+}
+
+int
+ACE_Notification_Queue::purge_pending_notifications(
+  ACE_Event_Handler * eh,
+  ACE_Reactor_Mask mask)
+{
+  ACE_TRACE ("ACE_Notification_Queue::purge_pending_notifications");
+
+  ACE_GUARD_RETURN (ACE_SYNCH_MUTEX, mon, this->notify_queue_lock_, -1);
+
+  if (this->notify_queue_.is_empty ())
+    return 0;
+
+  int number_purged = 0;
+  ACE_Notification_Queue_Node * node = notify_queue_.head();
+  while(node != 0)
+    {
+      if (!node->matches_for_purging(eh))
+        {
+          // Easy case, skip to the next node
+          node = node->next();
+          continue;
+        }
+
+      if (!node->mask_disables_all_notifications(mask))
+        {
+          // ... another easy case, skip this node too, but clear the
+          // mask first ...
+          node->clear_mask(mask);
+          node = node->next();
+          continue;
+        }
+
+      // ... this is the more complicated case, we want to remove the
+      // node from the notify_queue_ list.  First save the next node
+      // on the list:
+      ACE_Notification_Queue_Node * next = node->next();
+
+      // ... then remove it ...
+      notify_queue_.unsafe_remove(node);
+      ++number_purged;
+
+      // ... release resources ...
+      ACE_Event_Handler *event_handler = node->get().eh_;
+      event_handler->remove_reference ();
+
+      // ... now this is a free node ...
+      free_queue_.push_front(node);
+
+      // ... go to the next node, if there is one ...
+      node = next;
+    }
+
+  return number_purged;
+}
+
+int
+ACE_Notification_Queue::push_new_notification(
+  ACE_Notification_Buffer const & buffer)
+{
+  ACE_TRACE ("ACE_Notification_Queue::push_new_notification");
+
+  bool notification_required = false;
+
+  ACE_GUARD_RETURN (ACE_SYNCH_MUTEX, mon, this->notify_queue_lock_, -1);
+
+  // No pending notifications.
+  if (this->notify_queue_.is_empty ())
+    notification_required = true;
+
+  if (free_queue_.is_empty())
+    {
+      if (allocate_more_buffers() == -1)
+        {
+          return -1;
+        }
+    }
+
+  ACE_Notification_Queue_Node * node =
+    free_queue_.pop_front();
+
+  ACE_ASSERT (node != 0);
+  node->set(buffer);
+
+  notify_queue_.push_back(node);
+
+  if (!notification_required)
+    {
+      return 0;
+    }
+
+  return 1;
+}
+
+int
+ACE_Notification_Queue::pop_next_notification(
+  ACE_Notification_Buffer & current,
+  bool & more_messages_queued,
+  ACE_Notification_Buffer & next)
+{
+  ACE_TRACE ("ACE_Notification_Queue::pop_next_notification");
+
+  more_messages_queued = false;
+
+  ACE_GUARD_RETURN (ACE_SYNCH_MUTEX, mon, this->notify_queue_lock_, -1);
+
+  if (notify_queue_.is_empty ())
+    {
+      return 0;
+    }
+
+  ACE_Notification_Queue_Node * node = notify_queue_.pop_front();
+
+  current = node->get();
+  free_queue_.push_front(node);
+
+  if(!this->notify_queue_.is_empty())
+    {
+      more_messages_queued = true;
+      next = notify_queue_.head()->get();
+    }
+
+  return 1;
+}
+
+ACE_END_VERSIONED_NAMESPACE_DECL