[Tipc-discussion] Non-blocking I/O Support Questions

[<all...@wi...>]

Hi there:
 
I've been looking at the code relating to non-blocking sockets in TIPC, and
it doesn't seem to be quite right to me.
 
Question 1: The ioctl() routine in socket.c is using F_SETFL and O_NONBLOCK
to enable the non-blocking capability.  Shouldn't it be using FIONBIO?
(F_SETFL and O_NONBLOCK are used with fcntl(), not ioctl(), as far as I
know.)
 
Question 2: The implementation of ioctl() allows you to make a socket
non-blocking, but not to revert it back to blocking.  Is there a reason this
is not provided?
 
Question 3: Why is there a TIPC-specific socket option called
O_NONBLOCK_OPTION?  This seems to duplicate the existing standard socket
mechanism for making a socket non-blocking.
 
Question 4: I see code that prevents read operations from blocking, but
nothing that prevents a write operation from blocking.  Is this an
oversight?
 
Somehow I get the feeling I'm missing something important here ...
 
Regards,
Al