Re: Confused about a thread-safe singleton example.

Pete Becker <>
Wed, 3 Dec 2008 10:26:04 -0500
On 2008-12-03 07:42:55 -0500, (Stefan Ram) said:

Alan Johnson <> writes:

1. Don't use singletons. Ever. Pretty much all of the value of the GoF
Design Patterns book is negated by the fact that they chose to
legitimize Singleton as a design pattern. Singleton is just a fancy
name for global variable. We should call it the Global Variable

  In the C++ "Hello world!" program, usually ??::std::cout?? is used,
  which seems to be a ??global variable?? to me.
  (In Java, ??java.lang.System.out?? has the same r??le.)

  Do you see a way to get rid of it (Possibly by a redesign of
  the library)?

Before you redesign the library you have to be clear on what the goal
of the redesign is. Why is it bad for std::cout to be global? No
slogans, please. We all know that global variables are "evil". What
specific harm occurs because std::cout is global?

Roundhouse Consulting, Ltd. ( Author of "The
Standard C++ Library Extensions: a Tutorial and Reference

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