Hi all,
I was looking at the RTL code to see if the embedded target could be used as a workaround for unsupported OSes (e.g. some custom kernel) and noticed that there are some global function pointers used as callbacks for system-specific functionality - which is neat.
However i also noticed that the do_close procedure in sysfile.inc doesn't do anything (it is empty) and nothing calls the rtl_do_close callback (the other do_xxx procedures do call the equivalent rtl_do_xxx if they are set). I don't have any actual program to test that out, it was just something i noticed by reading the code but it seems like a bug to me as i can't see a way to close a file handle otherwise.
The code can be seen here:
https://gitlab.com/freepascal.org/fpc/source/-/blob/main/rtl/embedded/sysfile.inc?ref_type=heads#L25
My guess is that the code above should call rtl_do_close defined here:
https://gitlab.com/freepascal.org/fpc/source/-/blob/main/rtl/embedded/system.pp?ref_type=heads#L108
...like it is done in the other procedures in the sysfile.inc file.
FWIW the code for freertos seems to be exactly the same - empty do_close despite there being a rtl_do_close callback (which isn't used anywhere).
Kostas