* Wockenfuß, Frank wrote on Wed, Apr 02, 2008 at 09:07 +0200:
> Thank you for that hint.
> I will try to rebuild the class as singleton. This could help,
> but isn't really nice.
I think you'd need multiple classes. For things done once a
program life time, a C++ class (singleton) may not be suited, a
simple ordinary init function may be sufficient. However, such an
instance could make sense for instance if used on stack around
main in something like this:
int main()
{
OpenSSLAllEverything allocation;
return main_();
}
to ensure that it is released exactly once even in case of
exceptions. Maybe the class assert()s that it is constructed only
once to help application developers to find usage problems
quickly.
I think it is essential and required to call RAND_seed once and
only once. Functions like X509_verify_cert may be desired as
X509Certificat::verify().
> > Doing it per-object creation is unnecessary and error prone
> > (as maybe the case here). I believe it should be possible to
> > do it once per program lifetime without changing your C++
> > class too much.
Maybe having a static instance counter, so resources could be
freed if the last instance is destroyed? But to much automagic
handling may not be good; imagine, this would be linked with a
similar class that also has its own instance counter...
oki,
Steffen
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