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.

tests/bugs/fclasses/bug28478

@@ -5,10 +5,13 @@ puts ""
 puts "# Test output of progress indicator in text mode"
 
 pload QAcommands
+
+XProgress +t
+
 set out [OCC28478 3 2]
 
 set expected {
-  {Progress: 0% Outer: 0 / 3}
+  {Progress: 0%}
   {Progress: 17% Outer: 1 / 3 Inner: 1 / 2}
   {Progress: 33% Outer: 1 / 3 Inner: 2 / 2}
   {Progress: 50% Outer: 2 / 3 Inner: 1 / 2}

tests/bugs/fclasses/bug31092

@@ -5,21 +5,27 @@ puts ""
 puts "# Test output of progress indicator in text mode (infinite scale)"
 
 pload QAcommands
+
+XProgress +t
+
 set out [OCC28478 3 2 -inf]
 
 set expected {
-  {Progress: 0% Outer: 0 / 3}
+  {Progress: 0%}
   {Progress: 11% Outer: 1 / 3 Inner: 1}
   {Progress: 17% Outer: 1 / 3 Inner: 2}
   {Progress: 20% Outer: 1 / 3 Inner: 3}
+  {Progress: 22% Outer: 1 / 3 Inner: 4}
   {Progress: 33% Outer: 1 / 3 Inner: finished}
   {Progress: 44% Outer: 2 / 3 Inner: 1}
   {Progress: 50% Outer: 2 / 3 Inner: 2}
   {Progress: 53% Outer: 2 / 3 Inner: 3}
+  {Progress: 56% Outer: 2 / 3 Inner: 4}
   {Progress: 67% Outer: 2 / 3 Inner: finished}
   {Progress: 78% Outer: 3 / 3 Inner: 1}
   {Progress: 83% Outer: 3 / 3 Inner: 2}
   {Progress: 87% Outer: 3 / 3 Inner: 3}
+  {Progress: 89% Outer: 3 / 3 Inner: 4}
   {Progress: 100% Outer: 3 / 3 Inner: finished}
 }