kc3-lang/libevent/make_epoll_table.py
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Hash : b1b69ac7
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Date : 2014-01-17T23:20:42
Implemented EV_CLOSED event for epoll backend (EPOLLRDHUP). - Added new EV_CLOSED event - detects premature connection close by clients without the necessity of reading all the pending data. Does not depend on EV_READ and/or EV_WRITE. - Added new EV_FEATURE_EARLY_CLOSED feature for epoll. Must be supported for listening to EV_CLOSED event. - Added new regression test: test-closed.c - All regression tests passed (test/regress and test/test.sh) - strace output of test-closed using EV_CLOSED: socketpair(PF_LOCAL, SOCK_STREAM, 0, [6, 7]) = 0 sendto(6, "test string\0", 12, 0, NULL, 0) = 12 shutdown(6, SHUT_WR) = 0 epoll_ctl(3, EPOLL_CTL_ADD, 7, {EPOLLRDHUP, {u32=7, u64=7}}) = 0 epoll_wait(3, {{EPOLLRDHUP, {u32=7, u64=7}}}, 32, 3000) = 1 epoll_ctl(3, EPOLL_CTL_MOD, 7, {EPOLLRDHUP, {u32=7, u64=7}}) = 0 fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 4), ...}) mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYM... write(1, "closed_cb: detected connection close "..., 45) = 45
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make_epoll_table.py
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#!/usr/bin/python2 def get(old,wc,rc,cc): if ('xxx' in (rc, wc, cc)): return "0",255 if ('add' in (rc, wc, cc)): events = [] if rc == 'add' or (rc != 'del' and 'r' in old): events.append("EPOLLIN") if wc == 'add' or (wc != 'del' and 'w' in old): events.append("EPOLLOUT") if cc == 'add' or (cc != 'del' and 'c' in old): events.append("EPOLLRDHUP") if old == "0": op = "EPOLL_CTL_ADD" else: op = "EPOLL_CTL_MOD" return "|".join(events), op if ('del' in (rc, wc, cc)): delevents = [] modevents = [] op = "EPOLL_CTL_DEL" if 'r' in old: modevents.append("EPOLLIN") if 'w' in old: modevents.append("EPOLLOUT") if 'c' in old: modevents.append("EPOLLRDHUP") for item, event in [(rc,"EPOLLIN"), (wc,"EPOLLOUT"), (cc,"EPOLLRDHUP")]: if item == 'del': delevents.append(event) if event in modevents: modevents.remove(event) if modevents: return "|".join(modevents), "EPOLL_CTL_MOD" else: return "|".join(delevents), "EPOLL_CTL_DEL" return 0, 0 def fmt(op, ev, old, wc, rc, cc): entry = "{ %s, %s },"%(op, ev) print "\t/* old=%3s, write:%3s, read:%3s, close:%3s */\n\t%s" % ( old, wc, rc, cc, entry) return len(entry) for old in ('0','r','w','rw','c','cr','cw','crw'): for wc in ('0', 'add', 'del', 'xxx'): for rc in ('0', 'add', 'del', 'xxx'): for cc in ('0', 'add', 'del', 'xxx'): op,ev = get(old,wc,rc,cc) fmt(op, ev, old, wc, rc, cc)