[Openmcl-devel] HANDLE leak in windows port

Raymond Wiker rwiker at gmail.com
Tue Jun 16 14:40:28 PDT 2009

I have a small web application built on top of Hunchentoot and  
supporting libraries, and have noticed that the number of Windows  
"handles" allocated to the process is steadily increasing. In fact,  
there seems to be a small number of handles leaked on every HTTP  

Having spent some time on this, my guess is that the low-level socket  
code tries to close sockets using the close() call. This would work on  
most Unixes (and Unixalikes), but Windows requires that closesocket()  
is used instead of close().

It appears that the function make-ioblock-stream has a hook for adding  
a socket-specific close() function, but it is hardcoded to 'fd-stream- 
close in the call from make-fd-stream. The call to make-fd-stream, in  
turn, has a TODO comment that indicates that the implementors have  
thought about the possible need for specializing close() behaviour.

Does this make sense? 

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