[fpc-pascal] Set ioresult

[L]

how to set it without writing a text driver plugin?

There was something like SetInOutRes for delphi in some unit.

Is global inoutres a threadvar, btw? Safe to set it directly as a global 
variable (eek.. should there be some function?) The docs say that it is 
"read only".

http://www.freepascal.org/docs-html/rtl/system/inoutres.html

Can this rule be broken in special cases..

p.s. I am working on a  operating system file locking solution that 
plugs right into the regular Text or TextFile records using 
fmShareDenyNone on windows and using fpFlock on windows. I don't want to 
write my own text driver to do this if I don't have to,  and just use a 
"cast" for now with my own special reset/assign calls. It's almost 
reinventing my own text driver but not needed yet. I want to set the 
inoutres based on some fpFlock and FileCreate(,fmsharedenynone) error 
results. But eventually i may just write my own text driver. All this 
will be available to the fpc community as a file sharing unit or text 
driver plugin btw. I am sick of not having file sharing/locking for the 
standard writeln Text handles.