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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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#ifndef _THRIFT_CONCURRENCY_MONITOR_H_
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#define _THRIFT_CONCURRENCY_MONITOR_H_ 1
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#include "Exception.h"
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namespace apache { namespace thrift { namespace concurrency {
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/**
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* A monitor is a combination mutex and condition-event. Waiting and
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* notifying condition events requires that the caller own the mutex. Mutex
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* lock and unlock operations can be performed independently of condition
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* events. This is more or less analogous to java.lang.Object multi-thread
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* operations
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*
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* Note that all methods are const. Monitors implement logical constness, not
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* bit constness. This allows const methods to call monitor methods without
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* needing to cast away constness or change to non-const signatures.
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*
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* @version $Id:$
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*/
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class Monitor {
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public:
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Monitor();
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virtual ~Monitor();
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virtual void lock() const;
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virtual void unlock() const;
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virtual void wait(int64_t timeout=0LL) const;
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virtual void notify() const;
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virtual void notifyAll() const;
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private:
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class Impl;
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Impl* impl_;
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};
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class Synchronized {
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public:
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Synchronized(const Monitor& value) :
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monitor_(value) {
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monitor_.lock();
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}
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~Synchronized() {
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monitor_.unlock();
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}
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private:
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const Monitor& monitor_;
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};
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}}} // apache::thrift::concurrency
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#endif // #ifndef _THRIFT_CONCURRENCY_MONITOR_H_
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