[geos-devel] initGEOS/finishGEOS and multiple subsystems

[Mateusz Loskot]

strk at refractions.net wrote:
> On Fri, Jun 30, 2006 at 10:30:21PM +0200, Mateusz Loskot wrote:
>> strk at refractions.net wrote:
>>> With GEOS-3.0.0 initGEOS/finishGEOS do not instantiate/delete a 
>>> GeometryFactory anymore. Rather the default GeometryFactory is 
>>> used. This should fix the problem.
>> What about backport to 2.2.x with ref-counted proposal? Such 
>> changes could would not affect existing code.
> 
> Ok with me.
> 
>> I'd like to repeat that in general, global factory should be 
>> replaced with shared object (e.g. managed by shared_ptr from Boost 
>> or our own home-made shared smart pointer). static factory can 
>> cause problems too: 
>> http://www.parashift.com/c++-faq-lite/ctors.html#faq-10.12
> 
> We're using "construct on first use" idiom if I'm not wrong (see faq 
> 10.13).

Yes, we are.
But we still need to be careful:
http://www.parashift.com/c++-faq-lite/ctors.html#faq-10.14

Cheers
-- 
Mateusz Loskot
http://mateusz.loskot.net