src/smt/smt_engine_scope.h

   1 /*********************                                                        */
   2 /*! \file smt_engine_scope.h
   3  ** \verbatim
   4  ** Original author: mdeters
   5  ** Major contributors: none
   6  ** Minor contributors (to current version): none
   7  ** This file is part of the CVC4 prototype.
   8  ** Copyright (c) 2009-2012  The Analysis of Computer Systems Group (ACSys)
   9  ** Courant Institute of Mathematical Sciences
  10  ** New York University
  11  ** See the file COPYING in the top-level source directory for licensing
  12  ** information.\endverbatim
  13  **
  14  ** \brief [[ Add one-line brief description here ]]
  15  **
  16  ** [[ Add lengthier description here ]]
  17  ** \todo document this file
  18  **/
  19
  20 #include "cvc4_private.h"
  21
  22 #include "smt/smt_engine.h"
  23 #include "util/tls.h"
  24 #include "util/Assert.h"
  25 #include "expr/node_manager.h"
  26 #include "util/output.h"
  27
  28 #pragma once
  29
  30 namespace CVC4 {
  31 namespace smt {
  32
  33 extern CVC4_THREADLOCAL(SmtEngine*) s_smtEngine_current;
  34
  35 inline SmtEngine* currentSmtEngine() {
  36   Assert(s_smtEngine_current != NULL);
  37   return s_smtEngine_current;
  38 }
  39
  40 class SmtScope : public NodeManagerScope {
  41   /** The old NodeManager, to be restored on destruction. */
  42   SmtEngine* d_oldSmtEngine;
  43
  44 public:
  45
  46   SmtScope(const SmtEngine* smt) :
  47     NodeManagerScope(smt->d_nodeManager),
  48     d_oldSmtEngine(s_smtEngine_current) {
  49     Assert(smt != NULL);
  50     s_smtEngine_current = const_cast<SmtEngine*>(smt);
  51     Debug("current") << "smt scope: " << s_smtEngine_current << std::endl;
  52   }
  53
  54   ~SmtScope() {
  55     s_smtEngine_current = d_oldSmtEngine;
  56     Debug("current") << "smt scope: returning to " << s_smtEngine_current << std::endl;
  57   }
  58 };/* class SmtScope */
  59
  60 }/* CVC4::smt namespace */
  61 }/* CVC4 namespace */