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/*
*
* 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/sys/AggregateOutput.h"
#include "qpid/log/Statement.h"
#include <algorithm>
namespace qpid {
namespace sys {
void AggregateOutput::activateOutput() { control.activateOutput(); }
void AggregateOutput::giveReadCredit(int32_t credit) { control.giveReadCredit(credit); }
bool AggregateOutput::hasOutput() {
for (TaskList::const_iterator i = tasks.begin(); i != tasks.end(); ++i)
if ((*i)->hasOutput()) return true;
return false;
}
bool AggregateOutput::doOutput()
{
bool result = false;
if (!tasks.empty()) {
if (next >= tasks.size()) next = next % tasks.size();
size_t start = next;
//loop until a task generated some output
while (!result) {
result = tasks[next++]->doOutput();
if (tasks.empty()) break;
if (next >= tasks.size()) next = next % tasks.size();
if (start == next) break;
}
}
return result;
}
void AggregateOutput::addOutputTask(OutputTask* t)
{
tasks.push_back(t);
}
void AggregateOutput::removeOutputTask(OutputTask* t)
{
TaskList::iterator i = std::find(tasks.begin(), tasks.end(), t);
if (i != tasks.end()) tasks.erase(i);
}
void AggregateOutput::removeAll()
{
tasks.clear();
}
}} // namespace qpid::sys
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