Thread-safety in mapscript_csharp.dll?

[Umberto Nicoletti]

This document discusses what features are safe to use and what aren't:
http://mapserver.gis.umn.edu/docs/faq/thread_safety

This one is more Java-on-Linux-centred but should be helpful anyway:
http://mapserver.gis.umn.edu/docs/howto/javamapscript

HTH,
Umberto


On 6/23/06, Jeff Dege <jdege at korterra.com> wrote:
> I'm just beginning with mapserver, and I'm evaluating different
> possibilities.
>
> In our shop, Windows/IIS/ASP.NET/C# would be the preferred approach.
>
> Using the compiled ASP.NET 1.1 DLLs from MS4W, I've had no difficulty
> getting mapscript_csharp.dll to work.
>
> But the docs are full of warnings about lack of thread safety.  The
> installation instructions for PHP_mapscript indicate that PHP should be
> installed to run in CGI mode, rather than in ISAPI mode, so that a
> separate instance of the mapscript DLLs are loaded for each request -
> because the mapscript DLLs aren't threadsafe.
>
> I'm assuming that the problem is still there when using the C# wrappers.
> Is there something I need to do, when using mapscript_csharp.dll from
> IIS, to prevent this problem?  Something I need to set in the
> configuration or the code so that the ASP.NET pages are run as CGI?
>
> I'd really hate to waste too much time building on top of
> mapscript_csharp, only to find that it won't work reliably once multiple
> users start accessing it.
>
> Answers, or pointers to docs, would be appreciated.
>
> Thanks.
>