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Comparing libev/ev_poll.c (file contents):
Revision 1.23 by root, Thu Apr 10 06:48:12 2008 UTC vs.
Revision 1.39 by root, Sat Jun 4 05:33:29 2011 UTC

1/* 1/*
2 * libev poll fd activity backend 2 * libev poll fd activity backend
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
40#include <poll.h> 40#include <poll.h>
41 41
42void inline_size 42void inline_size
43pollidx_init (int *base, int count) 43pollidx_init (int *base, int count)
44{ 44{
45 /* consider using memset (.., -1, ...), which is practically guaranteed
46 * to work on all systems implementing poll */
45 while (count--) 47 while (count--)
46 *base++ = -1; 48 *base++ = -1;
47} 49}
48 50
49static void 51static void
… …
85 87
86static void 88static void
87poll_poll (EV_P_ ev_tstamp timeout) 89poll_poll (EV_P_ ev_tstamp timeout)
88{ 90{
89 struct pollfd *p; 91 struct pollfd *p;
92 int res;
93
94 EV_RELEASE_CB;
90 int res = poll (polls, pollcnt, (int)ceil (timeout * 1000.)); 95 res = poll (polls, pollcnt, timeout * 1e3);
96 EV_ACQUIRE_CB;
91 97
92 if (expect_false (res < 0)) 98 if (expect_false (res < 0))
93 { 99 {
94 if (errno == EBADF) 100 if (errno == EBADF)
95 fd_ebadf (EV_A); 101 fd_ebadf (EV_A);
96 else if (errno == ENOMEM && !syserr_cb) 102 else if (errno == ENOMEM && !syserr_cb)
97 fd_enomem (EV_A); 103 fd_enomem (EV_A);
98 else if (errno != EINTR) 104 else if (errno != EINTR)
99 syserr ("(libev) poll"); 105 ev_syserr ("(libev) poll");
100 } 106 }
107 else
108 for (p = polls; res; ++p)
109 {
110 assert (("libev: poll() returned illegal result, broken BSD kernel?", p < polls + pollcnt));
101 111
102 for (p = polls; res; ++p)
103 if (expect_false (p->revents)) /* this expect is debatable */ 112 if (expect_false (p->revents)) /* this expect is debatable */
104 { 113 {
105 --res; 114 --res;
106 115
107 if (expect_false (p->revents & POLLNVAL)) 116 if (expect_false (p->revents & POLLNVAL))
108 fd_kill (EV_A_ p->fd); 117 fd_kill (EV_A_ p->fd);
109 else 118 else
110 fd_event ( 119 fd_event (
111 EV_A_ 120 EV_A_
112 p->fd, 121 p->fd,
113 (p->revents & (POLLOUT | POLLERR | POLLHUP) ? EV_WRITE : 0) 122 (p->revents & (POLLOUT | POLLERR | POLLHUP) ? EV_WRITE : 0)
114 | (p->revents & (POLLIN | POLLERR | POLLHUP) ? EV_READ : 0) 123 | (p->revents & (POLLIN | POLLERR | POLLHUP) ? EV_READ : 0)
124 );
115 ); 125 }
116 } 126 }
117} 127}
118 128
119int inline_size 129int inline_size
120poll_init (EV_P_ int flags) 130poll_init (EV_P_ int flags)
121{ 131{
122 backend_fudge = 0.; /* posix says this is zero */ 132 backend_mintime = 1e-3;
123 backend_modify = poll_modify; 133 backend_modify = poll_modify;
124 backend_poll = poll_poll; 134 backend_poll = poll_poll;
125 135
126 pollidxs = 0; pollidxmax = 0; 136 pollidxs = 0; pollidxmax = 0;
127 polls = 0; pollmax = 0; pollcnt = 0; 137 polls = 0; pollmax = 0; pollcnt = 0;
128 138
129 return EVBACKEND_POLL; 139 return EVBACKEND_POLL;

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