1 files changed, 95 insertions, 0 deletions
diff --git a/src/theory/shared_solver_distributed.cpp b/src/theory/shared_solver_distributed.cpp
new file mode 100644
index 000000000..873c81db1
--- /dev/null
+++ b/src/theory/shared_solver_distributed.cpp
@@ -0,0 +1,95 @@
+/*********************                                                        */
+/*! \file shared_solver_distributed.cpp
+ ** \verbatim
+ ** Top contributors (to current version):
+ **   Andrew Reynolds
+ ** This file is part of the CVC4 project.
+ ** Copyright (c) 2009-2020 by the authors listed in the file AUTHORS
+ ** in the top-level source directory) and their institutional affiliations.
+ ** All rights reserved.  See the file COPYING in the top-level source
+ ** directory for licensing information.\endverbatim
+ **
+ ** \brief Shared solver in the distributed architecture
+ **/
+
+#include "theory/shared_solver_distributed.h"
+
+#include "theory/theory_engine.h"
+
+namespace CVC4 {
+namespace theory {
+
+SharedSolverDistributed::SharedSolverDistributed(TheoryEngine& te)
+    : SharedSolver(te)
+{
+}
+
+bool SharedSolverDistributed::needsEqualityEngine(theory::EeSetupInfo& esi)
+{
+  return d_sharedTerms.needsEqualityEngine(esi);
+}
+
+void SharedSolverDistributed::setEqualityEngine(eq::EqualityEngine* ee)
+{
+  d_sharedTerms.setEqualityEngine(ee);
+}
+
+void SharedSolverDistributed::preRegisterSharedInternal(TNode t)
+{
+  if (t.getKind() == kind::EQUAL)
+  {
+    // When sharing is enabled, we propagate from the shared terms manager also
+    d_sharedTerms.addEqualityToPropagate(t);
+  }
+}
+
+EqualityStatus SharedSolverDistributed::getEqualityStatus(TNode a, TNode b)
+{
+  // if we're using a shared terms database, ask its status if a and b are
+  // shared.
+  if (d_sharedTerms.isShared(a) && d_sharedTerms.isShared(b))
+  {
+    if (d_sharedTerms.areEqual(a, b))
+    {
+      return EQUALITY_TRUE_AND_PROPAGATED;
+    }
+    else if (d_sharedTerms.areDisequal(a, b))
+    {
+      return EQUALITY_FALSE_AND_PROPAGATED;
+    }
+  }
+  // otherwise, ask the theory
+  return d_te.theoryOf(Theory::theoryOf(a.getType()))->getEqualityStatus(a, b);
+}
+
+TrustNode SharedSolverDistributed::explain(TNode literal, TheoryId id)
+{
+  TrustNode texp;
+  if (id == THEORY_BUILTIN)
+  {
+    // explanation using the shared terms database
+    Node exp = d_sharedTerms.explain(literal);
+    texp = TrustNode::mkTrustPropExp(literal, exp, nullptr);
+    Trace("shared-solver")
+        << "\tTerm was propagated by THEORY_BUILTIN. Explanation: "
+        << texp.getNode() << std::endl;
+  }
+  else
+  {
+    // By default, we ask the individual theory for the explanation.
+    texp = d_te.theoryOf(id)->explain(literal);
+    Trace("shared-solver") << "\tTerm was propagated by owner theory: " << id
+                           << ". Explanation: " << texp.getNode() << std::endl;
+  }
+  return texp;
+}
+
+void SharedSolverDistributed::assertSharedEquality(TNode equality,
+                                                   bool polarity,
+                                                   TNode reason)
+{
+  d_sharedTerms.assertEquality(equality, polarity, reason);
+}
+
+}  // namespace theory
+}  // namespace CVC4