PPI: optimized internal connector packet handling (queuing only if necessary, pass...

[senf.git] / senf / PPI / Connectors.cci

diff --git a/senf/PPI/Connectors.cci b/senf/PPI/Connectors.cci
index af21cf9..957f15c 100644 (file)
--- a/senf/PPI/Connectors.cci
+++ b/senf/PPI/Connectors.cci
@@ -2,23 +2,28 @@
 //
 // Copyright (C) 2007
 // Fraunhofer Institute for Open Communication Systems (FOKUS)
-// Competence Center NETwork research (NET), St. Augustin, GERMANY
-//     Stefan Bund <g0dil@berlios.de>
 //
-// This program is free software; you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation; either version 2 of the License, or
-// (at your option) any later version.
+// The contents of this file are subject to the Fraunhofer FOKUS Public License
+// Version 1.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at 
+// http://senf.berlios.de/license.html
 //
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
+// The Fraunhofer FOKUS Public License Version 1.0 is based on, 
+// but modifies the Mozilla Public License Version 1.1.
+// See the full license text for the amendments.
 //
-// You should have received a copy of the GNU General Public License
-// along with this program; if not, write to the
-// Free Software Foundation, Inc.,
-// 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+// Software distributed under the License is distributed on an "AS IS" basis, 
+// WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 
+// for the specific language governing rights and limitations under the License.
+//
+// The Original Code is Fraunhofer FOKUS code.
+//
+// The Initial Developer of the Original Code is Fraunhofer-Gesellschaft e.V. 
+// (registered association), Hansastraße 27 c, 80686 Munich, Germany.
+// All Rights Reserved.
+//
+// Contributor(s):
+//   Stefan Bund <g0dil@berlios.de>
 
 /** \file
     \brief Connectors inline non-template implementation */
@@ -208,7 +213,7 @@ prefix_ senf::ppi::connector::ActiveConnector::ActiveConnector()
 //-/////////////////////////////////////////////////////////////////////////////////////////////////
 // senf::ppi::connector::InputConnector
 
-prefix_ senf::Packet senf::ppi::connector::InputConnector::read()
+prefix_ senf::Packet const & senf::ppi::connector::InputConnector::read()
 {
     return operator()();
 }
@@ -220,46 +225,24 @@ prefix_ senf::ppi::connector::OutputConnector & senf::ppi::connector::InputConne
     return *peer_;
 }
 
-prefix_ senf::ppi::connector::InputConnector::queue_iterator
-senf::ppi::connector::InputConnector::begin()
-    const
-{
-    return queue_.begin();
-}
-
-prefix_ senf::ppi::connector::InputConnector::queue_iterator
-senf::ppi::connector::InputConnector::end()
-    const
-{
-    return queue_.end();
-}
-
-prefix_ senf::Packet senf::ppi::connector::InputConnector::peek()
-    const
-{
-    // Cannot peek() head of empty queue
-    SENF_ASSERT( ! queue_.empty(),
-                 "senf::ppi::connector::InputConnector: cannot call peek() on empty queue" );
-    return queue_.back();
-}
-
 prefix_ senf::ppi::connector::InputConnector::size_type
 senf::ppi::connector::InputConnector::queueSize()
     const
 {
-    return queue_.size();
+    return queue_.size() + (fastPacket_ ? 1 : 0);
 }
 
 prefix_ bool senf::ppi::connector::InputConnector::empty()
     const
 {
-    return queue_.empty();
+    return fastPacket_ == NULL && queue_.empty();
 }
 
 //-/////////////////////////////////////////////////////////////////////////////////////////////////
 // protected members
 
 prefix_ senf::ppi::connector::InputConnector::InputConnector()
+    : fastPacket_(NULL)
 {}
 
 //-/////////////////////////////////////////////////////////////////////////////////////////////////
@@ -267,8 +250,22 @@ prefix_ senf::ppi::connector::InputConnector::InputConnector()
 
 prefix_ void senf::ppi::connector::InputConnector::enqueue(Packet const & p)
 {
-    queue_.push_front(p);
-    v_enqueueEvent();
+    if (queue_.empty()) {
+        fastPacket_ = &p;
+        try {
+            v_enqueueEvent();
+        } catch (Exception & e) {
+            queue_.push_front(p);
+            throw e;
+        }
+        if (fastPacket_) {
+            queue_.push_front(p);
+            fastPacket_ = NULL;
+        }
+    } else {
+        queue_.push_front(p);
+        v_enqueueEvent();
+    }
 }
 
 //-/////////////////////////////////////////////////////////////////////////////////////////////////