Willy Tarreau 77abb43ed1 MINOR: fd: add two flags ERR and SHUT to describe FD states ... There's currently a big ambiguity on our use of POLLHUP because we currently map POLLHUP and POLLRDHUP to FD_POLL_HUP. The first one indicates a close in *both* directions while the second one indicates a unidirectional close. Since we don't know from the resulting flag we always have to read when reported. Furthermore kqueue only reports unidirectional responses which are mapped to FD_POLL_HUP as well, and their write closes are mapped to a general error. We could add a new FD_POLL_RDHUP flag to improve the mapping, or switch only to the POLL* flags, but that further complicates the portability for operating systems like FreeBSD which do not have POLLRDHUP but have its semantics. Let's instead directly use the per-direction flag values we already have, and it will be a first step in the direction of finer states. Thus we introduce an ERR and a SHUT status for each direction, that the pollers will be able to compute and pass to fd_update_events(). It's worth noting that FD_EV_STATUS already sees the two new flags, but they are harmless since used only by fd_{recv,send}_state() which are never called. Thus in its current state this patch must be totally transparent.		2019-09-06 18:33:07 +02:00
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common	MINOR: tools: add a generic struct "name_desc" for name-description pairs	2019-08-29 09:34:53 +02:00
import	BUILD: threads/plock: fix a build issue on Clang without optimization	2017-11-20 21:06:35 +01:00
proto	MINOR: fd: add two new calls fd_cond_{recv,send}()	2019-09-06 17:50:36 +02:00
types	MINOR: fd: add two flags ERR and SHUT to describe FD states	2019-09-06 18:33:07 +02:00