Ranting on....
I did a small testing program using FPC on X86/32 Linux and found that
GS stays the same with multiple threads (always $0033). So seemingly -
just like with Windows (Linux using GS instead of FS) - it's not (as I
supposed) that the GS value is a per-Thread constant, but the selector
value is constant and the table it points to is different for each thread.
The address of the threadvar is the same in all threads, seemingly the
address calculation does not acknowledge the threadvar type by modifying
it's address to make relative to the DS selector (maybe this is not even
possible at all). Don't use pointers to threadvars !!!! (Maybe this
caused the problem mentioned in the other thread ???)
In Delphi (Win32) the address of the threadvar is different for the
threads, as there is one more indirection in Windows, and the the
FS-depending thread-specific area yields the DS-depending address of the
final threadvar area.
-Michael
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