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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/IOHandle.h"
// FIXME aconway 2008-08-11: this could be of more general interest,
// move to sys namespace in common lib.
//
namespace qpid {
namespace cluster {
/**
* A pollable condition to integrate in-process conditions with IO
* conditions in a polling loop.
*
* Setting the condition makes it readable for a poller.
*
* Writable/disconnected conditions are undefined and should not be
* polled for.
*/
class PollableCondition : public sys::IOHandle {
public:
PollableCondition();
/** Set the condition, triggers readable in a poller. */
void set();
/** Get the current state of the condition, then clear it.
*@return The state of the condition before it was cleared.
*/
bool clear();
};
}} // namespace qpid::cluster
#endif /*!QPID_SYS_POLLABLECONDITION_H*/
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