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#ifndef QPID_SYS_POLLABLECONDITION_H
#define QPID_SYS_POLLABLECONDITION_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/sys/Poller.h"
#include "qpid/CommonImportExport.h"
#include <boost/function.hpp>
#include <boost/shared_ptr.hpp>
namespace qpid {
namespace sys {
class PollableConditionPrivate;
class PollableCondition {
public:
typedef boost::function1<void, PollableCondition&> Callback;
QPID_COMMON_EXTERN PollableCondition(const Callback& cb,
const boost::shared_ptr<sys::Poller>& poller);
QPID_COMMON_EXTERN ~PollableCondition();
/**
* Set the condition. Triggers callback to Callback from Poller.
* When callback is made, condition is suspended. Call rearm() to
* resume reacting to the condition.
*/
QPID_COMMON_EXTERN void set();
/**
* Get the current state of the condition, then clear it.
*
* @return The state of the condition before it was cleared.
*/
QPID_COMMON_EXTERN bool clear();
/**
* Temporarily suspend the ability for the poller to react to the
* condition. It can be rearm()ed later.
*/
QPID_COMMON_EXTERN void disarm();
/**
* Reset the ability for the poller to react to the condition.
*/
QPID_COMMON_EXTERN void rearm();
private:
PollableConditionPrivate *impl;
Callback callback;
boost::shared_ptr<sys::Poller> poller;
};
}} // namespace qpid::sys
#endif /*!QPID_SYS_POLLABLECONDITION_H*/
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