signal handling

[rlonstein via Digitalmars-d-learn]

On Friday, 6 February 2015 at 19:40:44 UTC, Danny wrote:
> Hi,
>
> if I want to clean up inside a signal handler and then exit the 
> process (as it would have without me handling it), what do I do?
>
> Can I exit() inside a signal handler or should I use a more 
> direct "quit now" function? (after all, it could have been in 
> the middle of relinking the free list when the signal arrived)

I'm using a basic C-style sigaction with core.sys.posix.signal 
and calling std.c.stdlib:exit. For context, I'm performing serial 
communication with an actual device so the signal may come when 
my code is blocked in an vendor API call or on an underlying 
syscall. I have very little state so I'm doing equally little 
beside freeing extern handles. Setting a global flag and testing 
it didn't really prove adequate and littered the checks 
everywhere so I'm thinking now of leveraging std.signals but I'm 
not sure that will be reliable.