Mercurial > hg > orthanc-stone
view Framework/Deprecated/Messages/LockingEmitter.h @ 1314:9b126de2cde2 broker
Since the observer system now uses shared_ptr and many registrations are
done in the constructors, and since we cannot called shared_from_this() in
the constructors, it is mandatory to split construction from registration.
This has been done by making many ctors protected and replacing them
by factory methods that directly return shared_ptrs + added PostConstructor
method when base classes perform shared_from_this() calls too.
author | Benjamin Golinvaux <bgo@osimis.io> |
---|---|
date | Mon, 16 Mar 2020 11:19:50 +0100 |
parents | 7ec8fea061b9 |
children | 30deba7bc8e2 |
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/** * Stone of Orthanc * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics * Department, University Hospital of Liege, Belgium * Copyright (C) 2017-2020 Osimis S.A., Belgium * * This program is free software: you can redistribute it and/or * modify it under the terms of the GNU Affero General Public License * as published by the Free Software Foundation, either version 3 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. **/ #pragma once #include <Core/Enumerations.h> #include <Core/OrthancException.h> #include "../../Messages/IMessageEmitter.h" #include "../../Messages/IObservable.h" #include <Core/Enumerations.h> // For ORTHANC_OVERRIDE #include <boost/thread/shared_mutex.hpp> namespace Deprecated { /** * This class is used when using the ThreadedOracle : since messages * can be sent from multiple Oracle threads, this IMessageEmitter * implementation serializes the callbacks. * * The internal mutex used in Oracle messaging can also be used to * protect the application data. Thus, this class can be used as a single * application-wide mutex. */ class LockingEmitter : public OrthancStone::IMessageEmitter { private: boost::shared_mutex mutex_; OrthancStone::IObservable oracleObservable_; public: virtual void EmitMessage(boost::weak_ptr<OrthancStone::IObserver> observer, const OrthancStone::IMessage& message) ORTHANC_OVERRIDE; class ReaderLock : public boost::noncopyable { private: LockingEmitter& that_; boost::shared_lock<boost::shared_mutex> lock_; public: ReaderLock(LockingEmitter& that) : that_(that), lock_(that.mutex_) { } }; class WriterLock : public boost::noncopyable { private: LockingEmitter& that_; boost::unique_lock<boost::shared_mutex> lock_; public: WriterLock(LockingEmitter& that) : that_(that), lock_(that.mutex_) { } OrthancStone::IObservable& GetOracleObservable() { return that_.oracleObservable_; } }; }; }