From: Roland Schwarz (roland.schwarz_at_[hidden])
Date: 2006-10-30 04:09:18
Martin Bonner wrote:
> You may be able to do a little better. The standard says "The storage
> for objects with static storage duration (3.7.1) shall be
> zeroinitialized (8.5) before any other initialization takes place."
> What is more, most normal operating systems give programs pages of
> memory that are zero-initialized, so compilers would have to do work to
> avoid this.
Sorry, I do not understand "so compilers would have to do work to
avoid this". Could you please try to state it with different
wording?
> I think that means you can declare constructors and STILL have the
> object well behaved.
Do you mean: the object might be already zero initialized before
the ctor runs? If yes: this is very dangerous to rely on!
1) "Might": the standard does not require it.
2) E.g.: MSVC initializes memory to "CDCDCDCDCDCD...." in debugging
builds, so there is at least one prominent case where the
assumption is false.
Roland