SCClassLibrary/Common/Streams/EventStreamCleanup.sc

   1 // Cleanup functions are passed a flag.
   2 // The flag is set false if nodes have already been freed by CmdPeriod
   3 // This caused a minor change to TempoClock:clear and TempoClock:cmdPeriod
   4
   5 EventStreamCleanup {
   6         var <>functions;                // cleanup functions from child streams and parent stream
   7         *new { ^super.new.clear }
   8
   9         clear {
  10                 functions = IdentitySet.new;
  11         }
  12
  13         addFunction { |event, function |
  14                 if(event.isKindOf(Dictionary)) {
  15                         functions = functions.add(function);
  16                         event[\addToCleanup] = event[\addToCleanup].add(function);
  17                 };
  18         }
  19
  20         addNodeCleanup { |event, function |
  21                 if(event.isKindOf(Dictionary)) {
  22                         functions = functions.add(function);
  23                         event[\addToNodeCleanup] = event[\addToNodeCleanup].add(function);
  24                 };
  25         }
  26
  27         update { | event |
  28                 if(event.isKindOf(Dictionary)) {
  29                         functions = functions.addAll(event[\addToNodeCleanup]);
  30                         functions = functions.addAll(event[\addToCleanup]);
  31                         functions = functions.removeAll(event[\removeFromCleanup]);
  32                 };
  33                 ^event
  34         }
  35
  36         exit { | event, freeNodes = true |
  37                 if(event.isKindOf(Dictionary)) {
  38                         this.update(event);
  39                         functions.do(_.value(freeNodes) );
  40                         event[\removeFromCleanup] = event[\removeFromCleanup].addAll(functions);
  41                         this.clear;
  42                 };
  43                 ^event
  44         }
  45
  46         terminate { | freeNodes = true |
  47                 functions.do(_.value(freeNodes));
  48                 this.clear
  49         }
  50
  51 }