Calling TThread.Synchronize in main thread

user_512728 0
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Stealing from Uwe Raabe's article Synchronize and Queue with Parameters I do this:

if GetCurrentThreadID = MainThreadID then
  FDataLogger(IntToStr(lNrItems) + ' elements:')
else
  TThread.Synchronize(nil,
          procedure
          begin
            FDataLogger(IntToStr(lNrItems) + ' elements:');
          end);

But if I just

  TThread.Synchronize(nil,
          procedure
          begin
            FDataLogger(IntToStr(lNrItems) + ' elements:');
          end);

that seems to work as well.

Since the first construct leads to more code, is there really much benefit from distinguishing the main thread?

delphi-10.3-rio delphi multithreading
1 Answers

Although the documentation warns you to do that, the actual code inside TThread.Synchronize resembles the wrapping code shown. So I am pretty sure that you can get away with the shorter version.

Perhaps I was also mislead by the documentation (or in ancient times may have been bitten by such a behavior in Delphi 5 or so) when I wrote that article.

user_268330
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