[postgis-tickets] [PostGIS] #2089: liblwgeom cannot be used through python ctypes

[PostGIS]

#2089: liblwgeom cannot be used through python ctypes
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 Reporter:  brushtyler   |       Owner:  strk         
     Type:  enhancement  |      Status:  new          
 Priority:  medium       |   Milestone:  PostGIS 2.1.0
Component:  liblwgeom    |     Version:  trunk        
 Keywords:               |  
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Comment(by strk):

 Still no luck with the second patch:
 {{{
 rt_module.c:58:1: error: redefinition of ‘Pg_magic_func’
 rt_module.c:23:1: note: previous definition of ‘Pg_magic_func’ was here
 rt_module.c:65:1: error: redefinition of ‘_PG_init’
 rt_module.c:30:1: note: previous definition of ‘_PG_init’ was here
 }}}

 Adding getters may be subject to race conditions (something else changes
 the handler between the getter call and the setter call). Not sure how a
 flexible and stable interface could look like for atomically setting the
 handlers. Maybe with input/output parameters (although that'd force the
 caller to provide non-const pointers). Or splitting into multiple
 functions each setting a single handler (although it wouldn't make much
 sense to register an allocator without a deallocator). Well, let's focus
 on a working build first :)

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/2089#comment:10>
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