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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.
*/
#ifndef _THRIFT_CONCURRENCY_MONITOR_H_
#define _THRIFT_CONCURRENCY_MONITOR_H_ 1
#include "Exception.h"
namespace apache { namespace thrift { namespace concurrency {
/**
* A monitor is a combination mutex and condition-event. Waiting and
* notifying condition events requires that the caller own the mutex. Mutex
* lock and unlock operations can be performed independently of condition
* events. This is more or less analogous to java.lang.Object multi-thread
* operations
*
* Note that all methods are const. Monitors implement logical constness, not
* bit constness. This allows const methods to call monitor methods without
* needing to cast away constness or change to non-const signatures.
*
* @version $Id:$
*/
class Monitor {
public:
Monitor();
virtual ~Monitor();
virtual void lock() const;
virtual void unlock() const;
virtual void wait(int64_t timeout=0LL) const;
virtual void notify() const;
virtual void notifyAll() const;
private:
class Impl;
Impl* impl_;
};
class Synchronized {
public:
Synchronized(const Monitor& value) :
monitor_(value) {
monitor_.lock();
}
~Synchronized() {
monitor_.unlock();
}
private:
const Monitor& monitor_;
};
}}} // apache::thrift::concurrency
#endif // #ifndef _THRIFT_CONCURRENCY_MONITOR_H_
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