jgmyers@netscape.com (John Myers) writes:
> Close. What we would have is a modification of the epoll_addf()
> semantics such that it would have an additional postcondition that if
> the new_fd is in the ready state (has data available) then at least
> one notification has been generated. In the code above, the three
> lines comprising the if statement labeled "7*" would be removed.
I see.
I assume the kernel implementation is no big deal: epoll_addf() has to
call the kernel internal equivalent to poll() with a zero timeout.
This wouldn't break the first "solution" in my earlier post, but it
would cause every new connection to experience one extra EAGAIN.
I see three possibilities:
1) keep the current epoll_addf()
2) modify it as John suggests, posting the initial ready state in
the next epoll_getevents()
3) both: add an option to epoll_addf() that says which of 1 or 2 is desired.
-- Buck
How hard would it be to modify the current epoll code to work that
way? I'd assume it's just a matter having epoll_addf call the legacy
poll() code to check the condition (with a zero timeout).
-- Buck
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Wed Oct 23 2002 - 22:00:46 EST