Re: select() in dynamically-linked code

Michel Schinz <[email protected]> writes:

> Martin Gasbichler <[email protected]> writes:
>
>> Michel Schinz <[email protected]> writes:
>
> [...]
>
>>> If yes, is there a solution, or are all libraries which use select()
>>> (or any signal stuff, I presume) fundamentally incompatible with scsh?
>>
>> You could block signals using sigprocmask() before calling the C
>> function.
>
> Ok, I'll look into that. Just a question, though: why doesn't scsh
> (well, I guess it's more Scheme 48, but anyway) disable its timer
> interrupt during calls to C functions, and re-enable it on return? It
> seems to me that these signals which keep on coming can cause
> problems, as in my case, and aren't needed at all while the C code is
> running. Am I missing something?

Well, first that would require two syscalls for every FFI call which
seems rather expensive. Second, I think C code should really be
prepared for incoming signals, SIGCHLD for example may also happen at
any time if you start processes.


-- 
Martin