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 "smt/smt_engine.h"
  21 #include "util/tls.h"
  22 #include "util/Assert.h"
  23 #include "expr/node_manager.h"
  24 #include "util/output.h"
  25
  26 #pragma once
  27
  28 namespace CVC4 {
  29 namespace smt {
  30
  31 extern CVC4_THREADLOCAL(SmtEngine*) s_smtEngine_current;
  32
  33 inline SmtEngine* currentSmtEngine() {
  34   Assert(s_smtEngine_current != NULL);
  35   return s_smtEngine_current;
  36 }
  37
  38 class SmtScope : public NodeManagerScope {
  39   /** The old NodeManager, to be restored on destruction. */
  40   SmtEngine* d_oldSmtEngine;
  41
  42 public:
  43
  44   SmtScope(const SmtEngine* smt) :
  45     NodeManagerScope(smt->d_nodeManager),
  46     d_oldSmtEngine(s_smtEngine_current) {
  47     Assert(smt != NULL);
  48     s_smtEngine_current = const_cast<SmtEngine*>(smt);
  49     Debug("current") << "smt scope: " << s_smtEngine_current << std::endl;
  50   }
  51
  52   ~SmtScope() {
  53     s_smtEngine_current = d_oldSmtEngine;
  54     Debug("current") << "smt scope: returning to " << s_smtEngine_current << std::endl;
  55   }
  56 };/* class SmtScope */
  57
  58 }/* CVC4::smt namespace */
  59 }/* CVC4 namespace */