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76 lines
2.1 KiB
C++
76 lines
2.1 KiB
C++
// Copyright (C) 2022 Check Point Software Technologies Ltd. All rights reserved.
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// Licensed under the Apache License, Version 2.0 (the "License");
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// 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, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef __SINGLETON_H__
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#define __SINGLETON_H__
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#include <typeinfo>
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#include <typeindex>
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#include <map>
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#include <set>
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#include <memory>
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#include "common.h"
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class Singleton
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{
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public:
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template <class I_Face>
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class Provide;
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template <class I_Face>
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class Consume;
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template <typename T>
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static bool exists();
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// Dealing with owned singletons - see advanced topics.
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class OwnedSingleton;
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template <typename DerivedFromOwnedSingleton>
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static DerivedFromOwnedSingleton * getOwned();
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template <typename DerivedFromOwnedSingleton>
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static bool existsOwned();
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template <typename DerivedFromOwnedSingleton, typename ... BuildArgs>
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static void newOwned(BuildArgs ... args);
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template <typename DerivedFromOwnedSingleton>
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static void deleteOwned();
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template <typename DerivedFromOwnedSingleton>
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static void setOwned(std::unique_ptr<DerivedFromOwnedSingleton> &&ptr);
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private:
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Singleton() {}
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template <typename I_Face>
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static I_Face * get();
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static void registerSingleton(std::type_index type, void *ptr);
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static void unregisterSingleton(std::type_index type, void *ptr);
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static void * get(const std::type_index &index);
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static bool exists(const std::type_index &index);
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static std::map<std::type_index, std::set<void *>> singles;
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static std::map<std::type_index, std::unique_ptr<OwnedSingleton>> owned_singles;
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};
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template <typename Component, typename Interface>
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Interface * getInterface();
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#include "impl/singleton.h"
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#endif // __SINGLETON_H__
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