[mapserver-users] Thread Safety

[Lime, Steve D (MNIT)]

Is this for MapScript? Should really let Tamas chime in. A single mapObj instance is modified during the course of a request once ingested from the mapfile. For example, it holds a populated label cache and other changes made after it is loaded specific to a request. So I guess that means one mapObj per thread.

From: kelly elton [mailto:its.the.doc at gmail.com]
Sent: Thursday, November 05, 2015 4:35 PM
To: Lime, Steve D (MNIT) <Steve.Lime at state.mn.us>; mapserver-users at lists.osgeo.org
Subject: Re: [mapserver-users] Thread Safety

To be sure, are you saying I can use a single map object for multiple threads, or will I need to have one map object per thread? What would you suggest?

On Thu, Nov 5, 2015 at 5:33 PM Lime, Steve D (MNIT) <Steve.Lime at state.mn.us<mailto:Steve.Lime at state.mn.us>> wrote:
You should be fine. I believe there are locks (mutex) around places where this is known to be a problem. I’ve never heard user reports of issues in this regard.

Steve

From: mapserver-users [mailto:mapserver-users-bounces at lists.osgeo.org<mailto:mapserver-users-bounces at lists.osgeo.org>] On Behalf Of kelly elton
Sent: Thursday, November 05, 2015 4:07 PM
To: mapserver-users at lists.osgeo.org<mailto:mapserver-users at lists.osgeo.org>
Subject: [mapserver-users] Thread Safety

Say....if I have two processes using the mapserver dll, are they going to conflict?
I'm noticing on the website it says "OGR layers: use unsafe CPL services"...In my map file I have 'CONNECTIONTYPE OGR'....what I do with the map object is project, and then draw to png, and that's about it....this isn't thread safe then? What about if I have multiple map objects, one per thread....is that thread safe?
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