[fdo-trac] #65: GDAL: Connection RefCount incremented for Internal woker objects

[FDO]

#65: GDAL: Connection RefCount incremented for Internal woker objects
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 Reporter:  gregboone         |         Owner:  gregboone
     Type:  defect            |        Status:  assigned 
 Priority:  major             |     Milestone:  3.2.2    
Component:  GDAL Provider     |       Version:  3.2.2    
 Severity:  1                 |    Resolution:           
 Keywords:  refcount, addref  |   External_id:           
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Old description:

> When the GDAL provider connection is created and Open() is called, the
> resulting !RefCount should be 1. With the GDAL provider the !RefCount is
> incremented to 3. These additional increments are caused during the Open
> process as the connection object is passed via method parameters, to
> several internal worker objects (including !FdoRfpClassData and
> !FdoRfpGeoBandRaster) who in turn call !AddRef on the connection. When
> dealing with internal worker objects, whoose lifespan is guaranteed to be
> the lifespan to the connection, these types of object should only hold
> soft references to the connection object so that a circular dependency
> does not occur. The solution to this issue is to not !AddRef the
> connection when storing the pointer as class data.

New description:

 When the GDAL provider connection is created and Open() is called, the
 resulting !RefCount should be 1. With the GDAL provider the !RefCount is
 incremented to 3. These additional increments are caused during the Open
 process as the connection object is passed, via method parameters, to
 several internal worker objects (including !FdoRfpClassData and
 !FdoRfpGeoBandRaster) who in turn call !AddRef on the connection. When
 dealing with internal worker objects, whoose lifespan is guaranteed to be
 the lifespan to the connection, these types of object should only hold
 soft references to the connection object so that a circular dependency
 does not occur. The solution to this issue is to not !AddRef the
 connection when storing the pointer as class data.

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Ticket URL: <http://trac.osgeo.org/fdo/ticket/65#comment:2>
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