RFC: Cygwin 64 bit?

Ryan Johnson ryan.johnson@cs.utoronto.ca
Wed Jun 29 13:23:00 GMT 2011


On 29/06/2011 3:30 AM, Corinna Vinschen wrote:
> On Jun 28 17:05, Ryan Johnson wrote:
>> One last thought, a question, actually: given that LONG is 32 bits
>> in 64-bit windows, and only the low 32-bits of handles are
>> meaningful****
>> ****how does that impact dll loading, BTW?
> No.  Should it?  Do you have an example to show what you're concerned
> about?
I just remember (somewhere in this now-enormous thread) somebody 
mentioned that only the low 32 bits of handles are meaningful in order 
to allow sharing of handles between 64- and 32-bit processes. It seems 
that this would force dlls to load in the low 2/4GB of memory so that 
their handles are shareable. Perhaps (hopefully) the sharing thing only 
applies to HANDLE and not to HMODULE?

Ryan



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