[geos-devel] initGEOS/finishGEOS and multiple subsystems

[strk at refractions.net]

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.

--strk;

On Fri, Jun 30, 2006 at 09:31:31AM -0500, Howard Butler wrote:
> Recently, Steve Lime reconfigured MapServer to use the GEOS C API 
> instead of the C++ one.  Python Cartographic Library, which builds on 
> MapServer and GEOS, among other things, *also* uses the GEOS C 
> API.  Each subsystem doesn't know when the other is calling 
> initGEOS/finishGEOS, and on teardown, this is causing a segfault 
> because the geomFactory has already been destroyed.
> 
> After some discussion on #gdal with Frank, Norman, and Mateusz, we 
> suggest that initGEOS/finishGEOS do some reference counting to ensure 
> that geomFactory isn't prematurely destroyed.
> 
> Does this seem reasonable?