From 7c5dc4f0064a89253fd770f896adca7ef49767a8 Mon Sep 17 00:00:00 2001
From: eap <eap@opencascade.com>
Date: Fri, 20 Jul 2012 16:11:12 +0000
Subject: [PATCH 1/1] Generalize "Cancel Compute" mechanism to be able to
 report "Computation canceled" instead of "Algorithm failed" as failure reason

+  volatile bool _computeCanceled; //!< is set to True while computing to stop it
---
 src/SMESH/SMESH_Algo.cxx | 12 ++++++++++--
 src/SMESH/SMESH_Algo.hxx |  8 ++++++--
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/src/SMESH/SMESH_Algo.cxx b/src/SMESH/SMESH_Algo.cxx
index 98e8af469..b92726fb1 100644
--- a/src/SMESH/SMESH_Algo.cxx
+++ b/src/SMESH/SMESH_Algo.cxx
@@ -682,11 +682,17 @@ bool SMESH_Algo::Compute(SMESH_Mesh & /*aMesh*/, SMESH_MesherHelper* /*aHelper*/
   return error( COMPERR_BAD_INPUT_MESH, "Mesh built on shape expected");
 }
 
-#ifdef WITH_SMESH_CANCEL_COMPUTE
+//=======================================================================
+//function : CancelCompute
+//purpose  : Sets _computeCanceled to true. It's usage depends on
+//  *        implementation of a particular mesher.
+//=======================================================================
+
 void SMESH_Algo::CancelCompute()
 {
+  _computeCanceled = true;
+  _error = COMPERR_CANCELED;
 }
-#endif
 
 //================================================================================
 /*!
@@ -748,6 +754,8 @@ void SMESH_Algo::InitComputeError()
     if ( (*elem)->GetID() < 1 )
       delete *elem;
   _badInputElements.clear();
+
+  _computeCanceled = false;
 }
 
 //================================================================================
diff --git a/src/SMESH/SMESH_Algo.hxx b/src/SMESH/SMESH_Algo.hxx
index ff0ab73b2..580445b48 100644
--- a/src/SMESH/SMESH_Algo.hxx
+++ b/src/SMESH/SMESH_Algo.hxx
@@ -134,9 +134,11 @@ public:
    */
   virtual bool Compute(SMESH_Mesh & aMesh, SMESH_MesherHelper* aHelper);
 
-#ifdef WITH_SMESH_CANCEL_COMPUTE
+  /*!
+   * \brief Sets _computeCanceled to true. It's usage depends on
+   *        implementation of a particular mesher.
+   */
   virtual void CancelCompute();
-#endif
 
   /*!
    * \brief evaluates size of prospective mesh on a shape
@@ -378,6 +380,8 @@ protected:
   int         _error;    //!< SMESH_ComputeErrorName or anything algo specific
   std::string _comment;  //!< any text explaining what is wrong in Compute()
   std::list<const SMDS_MeshElement*> _badInputElements; //!< to explain COMPERR_BAD_INPUT_MESH
+
+  volatile bool _computeCanceled; //!< is set to True while computing to stop it
 };
 
 #endif
-- 
2.30.2