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/*
*
* Copyright (c) 2006 The Apache Software Foundation
*
* Licensed 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.
*
*/
#ifndef _APRIOProcessor_
#define _APRIOProcessor_
#include "apr_poll.h"
#include <queue>
#include <iostream>
#include "APRMonitor.h"
#include "APRThread.h"
#include "IOSession.h"
#include "Runnable.h"
namespace qpid {
namespace io {
/**
* Manages non-blocking io through the APR polling
* routines. Interacts with the actual io tasks to be performed
* through the IOSession interface, an implementing instance of
* which must be set as the client_data of the apr_pollfd_t
* structures registered.
*/
class APRIOProcessor : private virtual qpid::concurrent::Runnable
{
const int size;
const apr_interval_time_t timeout;
apr_pollset_t* pollset;
int count;
qpid::concurrent::APRThread thread;
qpid::concurrent::APRMonitor lock;
volatile bool stopped;
void poll();
virtual void run();
public:
APRIOProcessor(apr_pool_t* pool, int size, int timeout);
/**
* Add the fd to the poll set. Relies on the client_data being
* an instance implementing IOSession, through which the write
* and read operations will be performed when readiness is
* indicated by the poll response.
*/
void add(apr_pollfd_t* const fd);
/**
* Remove the fd from the poll set.
*/
void remove(apr_pollfd_t* const fd);
/**
* Indicates whether the capacity of this processor has been
* reached (or whether it can still handle further fd's).
*/
bool full();
/**
* Indicates whether there are any fd's registered.
*/
bool empty();
/**
* Stop processing.
*/
void stop();
~APRIOProcessor();
};
}
}
#endif
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