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-rw-r--r--trunk/qpid/cpp/src/qpid/cluster/WriteEstimate.cpp63
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diff --git a/trunk/qpid/cpp/src/qpid/cluster/WriteEstimate.cpp b/trunk/qpid/cpp/src/qpid/cluster/WriteEstimate.cpp
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@@ -1,63 +0,0 @@
-/*
- *
- * 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 "WriteEstimate.h"
-#include "qpid/log/Statement.h"
-#include <boost/current_function.hpp>
-
-namespace qpid {
-namespace cluster {
-
-WriteEstimate::WriteEstimate(size_t initial)
- : growing(true), estimate(initial) {}
-
-size_t WriteEstimate::sending(size_t buffered) {
- // We want to send a doOutput request for enough data such
- // that if estimate bytes are written before it is self
- // delivered then what is left in the buffer plus the doOutput
- // request will be estimate bytes.
-
- size_t predictLeft = (buffered > estimate) ? buffered - estimate : 0;
- size_t request = (estimate > predictLeft) ? estimate - predictLeft : 0;
- return request;
-}
-
-size_t pad(size_t value) { return value + value/2; }
-
-void WriteEstimate::delivered(size_t sent, size_t buffered) {
- size_t wrote = sent > buffered ? sent - buffered : 0;
- if (wrote == 0) // No change
- return;
- if (buffered > 0) { // Buffer was over-stocked, we wrote to capacity.
- growing = false;
- estimate = pad(wrote); // Estimate at 1.5 write for padding.
- }
- else if (wrote > estimate) { // Wrote everything, buffer was under-stocked
- if (growing)
- estimate = std::max(estimate*2, pad(wrote)); // Grow quickly if we have not yet seen an over-stock.
- else
- estimate = pad(wrote);
- }
-}
-
-}} // namespace qpid::cluster
-
-