0025748: Parallel version of progress indicator

Progress indication mechanism is refactored to support incrementing progress within multithreaded algorithms.

The class Message_ProgressIndicator is only an interface to the user application.
It accumulates the progress provided by progress scopes.
The counter is protected by mutex for thread-safety.

The new class Message_ProgressScope replacing Message_ProgressSentry should be used to advance the progress.
The scopes are nested to each other to reflect the nested nature of operations.
The new class Message_ProgressRange should be used to pass the progress to sub-scopes.

All OCCT algorithms involving progress indication have been updated to new API.

Improvements in Draw_ProgressIndicator:
- Separate console mode has been added in order to make possible to put the progress into std::cout instead
  or in addition to the draw interpreter, instead of trigger option "-tclOutput".
- Treatment of Ctrl-Break signal has been added.
  Now any operation can be aborted by Ctrl-C or Ctrl-Break keystroke.

Added new test case 'perf fclasses progr_par' for testing of parallel work of the progress.

src/StlAPI/StlAPI_Writer.cxx

@@ -42,7 +42,7 @@ StlAPI_Writer::StlAPI_Writer()
 //=============================================================================
 Standard_Boolean StlAPI_Writer::Write (const TopoDS_Shape&    theShape,
                                        const Standard_CString theFileName,
-                                       const Handle(Message_ProgressIndicator)& theProgress)
+                                       const Message_ProgressRange& theProgress)
 {
   Standard_Integer aNbNodes = 0;
   Standard_Integer aNbTriangles = 0;

src/StlAPI/StlAPI_Writer.hxx

@@ -16,12 +16,7 @@
 #ifndef _StlAPI_Writer_HeaderFile
 #define _StlAPI_Writer_HeaderFile
 
-#include <Poly_Triangulation.hxx>
-#include <Standard.hxx>
-#include <Standard_DefineAlloc.hxx>
-#include <Standard_Handle.hxx>
-#include <Standard_Boolean.hxx>
-#include <Standard_CString.hxx>
+#include <Message_ProgressScope.hxx>
 #include <Message_ProgressIndicator.hxx>
 
 class TopoDS_Shape;
@@ -47,7 +42,7 @@ public:
   //! \return the error state.
   Standard_EXPORT Standard_Boolean Write (const TopoDS_Shape& theShape,
                                           const Standard_CString theFileName,
-                                          const Handle(Message_ProgressIndicator)& theProgress = NULL);
+                                          const Message_ProgressRange& theProgress = Message_ProgressRange());
 
 private:
   Standard_Boolean myASCIIMode;