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/****************************************************************************** |
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* Top contributors (to current version): |
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* Andrew Reynolds, Gereon Kremer |
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* |
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* This file is part of the cvc5 project. |
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* |
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* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS |
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* in the top-level source directory and their institutional affiliations. |
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* All rights reserved. See the file COPYING in the top-level source |
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* directory for licensing information. |
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* **************************************************************************** |
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* |
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* Management of a distributed approach for equality engines over |
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* all theories. |
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*/ |
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#include "cvc5_private.h" |
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#ifndef CVC5__THEORY__EE_MANAGER_DISTRIBUTED__H |
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#define CVC5__THEORY__EE_MANAGER_DISTRIBUTED__H |
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#include <memory> |
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#include "theory/ee_manager.h" |
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namespace cvc5 { |
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namespace theory { |
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namespace eq { |
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class EqualityEngine; |
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} |
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/** |
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* The (distributed) equality engine manager. This encapsulates an architecture |
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* in which all theories maintain their own copy of an equality engine. |
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* |
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* This class is not responsible for actually initializing equality engines in |
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* theories (since this class does not have access to the internals of Theory). |
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* Instead, it is only responsible for the construction of the equality |
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* engine objects themselves. TheoryEngine is responsible for querying this |
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* class during finishInit() to determine the equality engines to pass to each |
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* theories based on getEeTheoryInfo. |
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* |
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* This class is also responsible for setting up the master equality engine, |
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* which is used as a special communication channel to quantifiers engine (e.g. |
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* for ensuring quantifiers E-matching is aware of terms from all theories). |
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*/ |
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class EqEngineManagerDistributed : public EqEngineManager |
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{ |
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public: |
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EqEngineManagerDistributed(TheoryEngine& te, SharedSolver& shs); |
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~EqEngineManagerDistributed(); |
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/** |
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* Initialize theories. This method allocates unique equality engines |
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* per theories and connects them to a master equality engine. |
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*/ |
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void initializeTheories() override; |
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/** Notify model */ |
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void notifyModel(bool incomplete) override; |
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private: |
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/** notify class for master equality engine */ |
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class MasterNotifyClass : public theory::eq::EqualityEngineNotify |
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{ |
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public: |
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MasterNotifyClass(QuantifiersEngine* qe) : d_quantEngine(qe) {} |
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/** |
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* Called when a new equivalence class is created in the master equality |
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* engine. |
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*/ |
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void eqNotifyNewClass(TNode t) override; |
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bool eqNotifyTriggerPredicate(TNode predicate, bool value) override |
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{ |
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return true; |
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} |
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bool eqNotifyTriggerTermEquality(TheoryId tag, |
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TNode t1, |
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TNode t2, |
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bool value) override |
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{ |
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return true; |
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} |
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void eqNotifyConstantTermMerge(TNode t1, TNode t2) override {} |
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void eqNotifyMerge(TNode t1, TNode t2) override {} |
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void eqNotifyDisequal(TNode t1, TNode t2, TNode reason) override {} |
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private: |
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/** Pointer to quantifiers engine */ |
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QuantifiersEngine* d_quantEngine; |
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}; |
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/** The master equality engine notify class */ |
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std::unique_ptr<MasterNotifyClass> d_masterEENotify; |
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/** The master equality engine. */ |
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std::unique_ptr<eq::EqualityEngine> d_masterEqualityEngine; |
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/** The equality engine of the shared solver / shared terms database. */ |
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std::unique_ptr<eq::EqualityEngine> d_stbEqualityEngine; |
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}; |
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} // namespace theory |
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} // namespace cvc5 |
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#endif /* CVC5__THEORY__EE_MANAGER_DISTRIBUTED__H */ |