> > Is it possible to use SSL communications calls in a non-blocking fashion? I
> > am trying to implement SSL on a VMS environment that currently uses a lot of
> > asynchronous QIO calls. It appears that the existing SSL library consists
> > of socket style synchronous calls - or am I failing to understand it all.
> > Any pointers welcomed :-)
>
> fcntl(fd, F_SETFL, O_NONBLOCK);
>
> This means that your reads & writes will return instantly.
>
> select() can also be used to determine how much stuff is waiting in a
> socket.
but thats not the same as a VMS style asynchronous call, where sys$qio is
called with a callback routine. when data shows up on the port, the
callback routine is executed.
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