Re: OT: Windows (Was: Re: Open Source does not mean easily

On Mon, 06 Jan 2025 15:05:33 GMT
scott@slp53.sl.home (Scott Lurndal) wibbled:

Muttley@DastardlyHQ.org writes:

In Windows yes, which frankly is probably not a coincidence. Not so much
in unix unless you're writing a GUI program.

>
ASTs and unix signals have similar semantics.  It's certainly possible to
use, for example, SIGIO in a similar manner to the VMS AST, where the
AST signals I/O completion and the AST handler initiates a subsequent
operation.

Unix signals should only be used to set flags that are then read later. Doing
anything complicated in a signal handler is asking for trouble as you have
no idea where the program was when the signal occured and there can be all
sorts of re-entrant issues or even deadlocks if using mutexes.