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Comment on two similar conditions in tevent_standard.c, which,
otherwise, at a first glance, seem useless, i.e. always true.
The conditions checking glue->epoll_ops for being non-NULL, imply that
it *can* be NULL. A casual reader would not generally expect a "member"
function to modify its container's pointer in a container higher up, and
would assume that glue->epoll_ops could be NULL before the call,
resulting in a near-NULL pointer dereference.
However, in this case epoll_ops is indeed cleared in those "member"
functions, in the case of an epoll interface failure, to signify
fallback to poll interface.
Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Uri Simchoni <uri@samba.org>
Autobuild-User(master): Uri Simchoni <uri@samba.org>
Autobuild-Date(master): Tue Jul 12 13:56:41 CEST 2016 on sn-devel-144
We also need to fallback in tevent_loop_wait()
otherwise we might miss events in the poll->fresh list.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This was a horrible hybrid of duplicated epoll and select()
code.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu Feb 14 22:40:30 CET 2013 on sn-devel-104
Falls back cleanly from epoll -> poll, or uses poll if
epoll not available.
Signed-off-by: Jeremy Allison <jra@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
We might be called during tevent_re_initialise()
which means we need to free our old additional_data.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Set/get a single callback function to be invoked at various trace
points. Define "before wait" and "after wait" trace points - more
trace points can be added later if required.
CTDB wants this to log long waits and events.
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>
Signed-off-by: Martin Schwenke <martin@meltin.net>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
If an application using libtevent starts a new process the epoll file descriptor
is leaked to the new process if the event context is not freed explicitly. By
setting FD_CLOEXEC this is not needed anymore.
Signed-off-by: Simo Sorce <idra@samba.org>
The s3 libsmbclient puts two different handlers on a single fd for readability
and writability. With select this works fine, however without this patch we
unconditionally call the write handler even if the socket is only readable. We
should have called the read handler instead.
Autobuild-User: Jeremy Allison <jra@samba.org>
Autobuild-Date: Wed Oct 6 23:40:24 UTC 2010 on sn-devel-104
This makes the logic much simpler for the callers,
and matches the samba3 behavior.
If needed we can add performance tunning for tevent_loop_wait()
later.
metze
