2 * libev solaris event port backend
4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de>
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42 * http://bugs.opensolaris.org/view_bug.do?bug_id=6268715 (random results)
43 * http://bugs.opensolaris.org/view_bug.do?bug_id=6455223 (just totally broken)
44 * http://bugs.opensolaris.org/view_bug.do?bug_id=6873782 (manpage ETIME)
45 * http://bugs.opensolaris.org/view_bug.do?bug_id=6874410 (implementation ETIME)
46 * http://www.mail-archive.com/networking-discuss@opensolaris.org/msg11898.html ETIME vs. nget
47 * http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/lib/libc/port/gen/event_port.c (libc)
48 * http://cvs.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/common/fs/portfs/port.c#1325 (kernel)
51 #include <sys/types.h>
60 port_associate_and_check (EV_P_ int fd, int ev)
64 backend_fd, PORT_SOURCE_FD, fd,
65 (ev & EV_READ ? POLLIN : 0)
66 | (ev & EV_WRITE ? POLLOUT : 0),
74 ev_syserr ("(libev) port_associate");
79 port_modify (EV_P_ int fd, int oev, int nev)
81 /* we need to reassociate no matter what, as closes are
82 * once more silently being discarded.
87 port_dissociate (backend_fd, PORT_SOURCE_FD, fd);
90 port_associate_and_check (EV_A_ fd, nev);
94 port_poll (EV_P_ ev_tstamp timeout)
100 /* we initialise this to something we will skip in the loop, as */
101 /* port_getn can return with nget unchanged, but no indication */
102 /* whether it was the original value or has been updated :/ */
103 port_events [0].portev_source = 0;
106 EV_TS_SET (ts, timeout);
107 res = port_getn (backend_fd, port_events, port_eventmax, &nget, &ts);
110 /* port_getn may or may not set nget on error */
111 /* so we rely on port_events [0].portev_source not being updated */
112 if (res == -1 && errno != ETIME && errno != EINTR)
113 ev_syserr ("(libev) port_getn (see http://bugs.opensolaris.org/view_bug.do?bug_id=6268715, try LIBEV_FLAGS=3 env variable)");
115 for (i = 0; i < nget; ++i)
117 if (port_events [i].portev_source == PORT_SOURCE_FD)
119 int fd = port_events [i].portev_object;
124 (port_events [i].portev_events & (POLLOUT | POLLERR | POLLHUP) ? EV_WRITE : 0)
125 | (port_events [i].portev_events & (POLLIN | POLLERR | POLLHUP) ? EV_READ : 0)
128 fd_change (EV_A_ fd, EV__IOFDSET);
132 if (expect_false (nget == port_eventmax))
134 ev_free (port_events);
135 port_eventmax = array_nextsize (sizeof (port_event_t), port_eventmax, port_eventmax + 1);
136 port_events = (port_event_t *)ev_malloc (sizeof (port_event_t) * port_eventmax);
142 port_init (EV_P_ int flags)
144 /* Initialize the kernel queue */
145 if ((backend_fd = port_create ()) < 0)
148 assert (("libev: PORT_SOURCE_FD must not be zero", PORT_SOURCE_FD));
150 fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */
152 /* if my reading of the opensolaris kernel sources are correct, then
153 * opensolaris does something very stupid: it checks if the time has already
154 * elapsed and doesn't round up if that is the case,m otherwise it DOES round
155 * up. Since we can't know what the case is, we need to guess by using a
156 * "large enough" timeout. Normally, 1e-9 would be correct.
158 backend_mintime = 1e-3; /* needed to compensate for port_getn returning early */
159 backend_modify = port_modify;
160 backend_poll = port_poll;
162 port_eventmax = 64; /* initial number of events receivable per poll */
163 port_events = (port_event_t *)ev_malloc (sizeof (port_event_t) * port_eventmax);
165 return EVBACKEND_PORT;
172 ev_free (port_events);
181 while ((backend_fd = port_create ()) < 0)
182 ev_syserr ("(libev) port");
184 fcntl (backend_fd, F_SETFD, FD_CLOEXEC);
186 /* re-register interest in fds */