0023631: Infinite memory consumption in BRepMesh
[occt.git] / src / BRepMesh / BRepMesh_EdgeChecker.hxx
diff --git a/src/BRepMesh/BRepMesh_EdgeChecker.hxx b/src/BRepMesh/BRepMesh_EdgeChecker.hxx
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+// Created on: 2014-05-28
+// Created by: Oleg AGASHIN
+// Copyright (c) 2011-2014 OPEN CASCADE SAS
+//
+// This file is part of Open CASCADE Technology software library.
+//
+// This library is free software; you can redistribute it and/or modify it under
+// the terms of the GNU Lesser General Public License version 2.1 as published
+// by the Free Software Foundation, with special exception defined in the file
+// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
+// distribution for complete text of the license and disclaimer of any warranty.
+//
+// Alternatively, this file may be used under the terms of Open CASCADE
+// commercial license or contractual agreement.
+
+#ifndef _BRepMesh_EdgeChecker_HeaderFile
+#define _BRepMesh_EdgeChecker_HeaderFile
+
+#include <Standard.hxx>
+#include <Standard_Mutex.hxx>
+#include <Poly_Triangulation.hxx>
+#include <TopLoc_Location.hxx>
+#include <TopoDS_Edge.hxx>
+#include <Poly_PolygonOnTriangulation.hxx>
+#include <BRep_Tool.hxx>
+
+//! Auxilary class implementing functionality for checking consistency 
+//! of polygon on triangulation of the given edge.
+class BRepMesh_EdgeChecker
+{
+public:
+
+  //! Constructor
+  //! \param theFaceTri Poly triangulation of face the edges relie to.
+  //! \param theFaceLoc Face location to be used to extract polygon on triangulation.
+  //! \param theMutex Upper level shared mutex to protect isFailed flag from concurrent write access.
+  //! \param isFailed Upper level shared flag indicating that polygon on triangulation of checked 
+  //! edge is not consistent. If this flag is set to TRUE, other tasks will not check details of their data.
+  BRepMesh_EdgeChecker( Handle(Poly_Triangulation)& theFaceTri,
+                        TopLoc_Location&            theFaceLoc,
+                        Standard_Mutex&             theMutex,
+                        Standard_Boolean&           isFailed)
+    : myMutex(theMutex),
+      myIsFailed(isFailed),
+      myFaceLoc(theFaceLoc),
+      myFaceTri(theFaceTri)
+  {
+  }
+
+  //! Checker's body.
+  //! \param theEdge edge to be checked.
+  void operator ()(const TopoDS_Edge& theEdge) const
+  {
+    if (theEdge.IsNull() || myIsFailed)
+      return;
+
+    const Handle(Poly_PolygonOnTriangulation)& aPoly =
+      BRep_Tool::PolygonOnTriangulation(theEdge, myFaceTri, myFaceLoc);
+
+    if (!aPoly.IsNull())
+      return;
+
+    // Trianglulation stored inside a face is different 
+    // than the one an edge data connected to.
+    Standard_Mutex::Sentry aSentry(myMutex);
+    myIsFailed = Standard_True;
+  }
+
+private:
+
+  void operator =(const BRepMesh_EdgeChecker& /*theOther*/)
+  {
+  }
+
+private:
+  Standard_Mutex&             myMutex;
+  Standard_Boolean&           myIsFailed;
+  TopLoc_Location&            myFaceLoc;
+  Handle(Poly_Triangulation)& myFaceTri;
+};
+
+#endif