Synchronizing, part 1

In BB.Sync there are a few useful classes:

• TFuture<T>, calls a method within a thread and/or waits for the result. In TinyChess I use it to get the response from the search (here ProcessComputer is called over an infinite loop)

function TChessEngine.ProcessComputer: TMoveStatus;
var
  move: TMove;

begin
  if FTask = nil then
    FTask := TFuture<TMove>.Create(FSearch.Execute, tpHighest);

  if FTask.Available then
  begin
    move := FTask.Value;
    if move <> 0 then
    begin
      SendDataToProtocol(msMove, TMoveHelper.ToString(move));

      result := Play(move);
    end else
      result := msCheckmate;

    FreeAndNil(FTask);
  end else
    result := msNone;
end;

Many locks that implements the ILock interface (semaphores, mutex, SpinLocks, LockFree locks, critical sections, etc)
Extended thread (TThreadEx) with Java behaviour (threads can wait or awake other threads)
Interlocked functions (including 64 bit operations)