[Fdo-trac] [fdo-trac] #965: Static object destructors not called on Linux

[FDO]

#965: Static object destructors not called on Linux
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   Reporter:  jng      |      Owner:  jng
       Type:  defect   |     Status:  assigned
   Priority:  major    |  Milestone:
  Component:  FDO API  |    Version:
   Severity:  3        |   Keywords:
External ID:           |
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 I've noticed in running the various unit tests that static object
 destructors in various providers are not being called which results in the
 various teardown functions that are supposed to be called when the
 provider is being {{{dlclose()}}}'d are not being called.

 Upon further reading, a better solution is to have a Linux-specific
 teardown function decorated with {{{__attribute__((destructor))}}} like
 so:

 {{{

 //Various providers use this pattern for global data
 class InitClass
 {
 public:
     InitClass()
     {
         //...provider-specific setup
     }
     ~InitClass()
     {
         //...provider-specific teardown
     }
 }

 static InitClass init; //Supposedly calls destructor when cleaned up, but
 doesn't on Linux when dlclose()'d

 #ifndef _WIN32
 void __attribute__((destructor)) Teardown()
 {
     //...Call same provider-specific teardown as ~InitClass()
 }
 #endif

 }}}

 Such functions will be called when the provider is {{{dlclose()}}}'d

-- 
Ticket URL: <https://trac.osgeo.org/fdo/ticket/965>
FDO <http://fdo.osgeo.org/>
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