[mkgmap-dev] [PATCH v7] make maps in parallel

Mon May 18 08:59:24 BST 2009

Hi Steve,

> Hi
> 
> > Unfortunately, I have just discovered another issue which is the static
> > int nextPriority in GType - this needs to be changed to one instance
> > per map but at the moment I can't work out what to use as a key to
> > select the correct value for each map being processed concurrently. If
> > you have any thoughts on that, please say.
> 
> I think it doesn't matter what the priority is, just that values that are
> obtained later are higher.  So adding synchronized to getNextPriority()
> should do it.  What is the nature of the problem you see?

I haven't yet seen any problems but just found the (potential) issue by
searching for static data items that could cause problems when running
stuff in parallel.

As it happens, I have now coded around it by serialising the loading
of the OSM data. It makes almost zero difference to the run-time
so I am happy to leave GType as-is.

Cheers,

Mark