Optimized handling of accepts and completions.

SemanticState::accept/completed now make a single pass through the
SequenceSet of commands and the unacked DeliveryRecord list in
parallel, rather than doing a pass through unacked for every range in
the SequenceSet.


git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk/qpid@803655 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 51 insertions, 0 deletions

diff --git a/cpp/src/qpid/framing/IsInSequenceSet.h b/cpp/src/qpid/framing/IsInSequenceSet.h
new file mode 100644
index 0000000000..fe10c1b9fa
--- /dev/null
+++ b/cpp/src/qpid/framing/IsInSequenceSet.h
@@ -0,0 +1,51 @@
+#ifndef QPID_FRAMING_ISINSEQUENCESET_H
+#define QPID_FRAMING_ISINSEQUENCESET_H
+
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+
+#include "qpid/framing/SequenceSet.h"
+
+namespace qpid {
+namespace framing {
+/**
+ * Functor to test whether values are in a sequence set.  This is a
+ * stateful functor that requires the values to be supplied in order
+ * and takes advantage of that ordering to avoid multiple scans.
+ */
+class IsInSequenceSet
+{
+  public:
+    IsInSequenceSet(const SequenceSet& s) : set(s), i(set.rangesBegin()) {}
+
+    bool operator()(const SequenceNumber& n) {
+        while (i != set.rangesEnd() && i->end() <= n) ++i;
+        return i != set.rangesEnd() && i->begin() <= n;
+    }
+
+  private:
+    const SequenceSet& set;
+    SequenceSet::RangeIterator i;
+};
+
+}} // namespace qpid::framing
+
+#endif  /*!QPID_FRAMING_ISINSEQUENCESET_H*/