Yep, you're correct.
However, if your 'getMySingleton()' method is called only occasionally (i.e. it is not part of some performance sensitive code-path), making it thread-safe like that is good enough. No need to squeeze out every optimization.
Using DCL or the 'on-demand' holder work all OK, but it just complicates things if they are not absolutely necessary. Less code an more readable. :-)
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