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Comparing libev/ev_poll.c (file contents):
Revision 1.27 by root, Wed Oct 29 06:32:48 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) 2007,2008 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 pratically guarenteed 45 /* consider using memset (.., -1, ...), which is practically guaranteed
46 * to work on all systems implementing poll */ 46 * to work on all systems implementing poll */
47 while (count--) 47 while (count--)
48 *base++ = -1; 48 *base++ = -1;
49} 49}
50 50
… …
87 87
88static void 88static void
89poll_poll (EV_P_ ev_tstamp timeout) 89poll_poll (EV_P_ ev_tstamp timeout)
90{ 90{
91 struct pollfd *p; 91 struct pollfd *p;
92 int res;
93
94 EV_RELEASE_CB;
92 int res = poll (polls, pollcnt, (int)ceil (timeout * 1000.)); 95 res = poll (polls, pollcnt, timeout * 1e3);
96 EV_ACQUIRE_CB;
93 97
94 if (expect_false (res < 0)) 98 if (expect_false (res < 0))
95 { 99 {
96 if (errno == EBADF) 100 if (errno == EBADF)
97 fd_ebadf (EV_A); 101 fd_ebadf (EV_A);
… …
100 else if (errno != EINTR) 104 else if (errno != EINTR)
101 ev_syserr ("(libev) poll"); 105 ev_syserr ("(libev) poll");
102 } 106 }
103 else 107 else
104 for (p = polls; res; ++p) 108 for (p = polls; res; ++p)
105 if (expect_false (p->revents)) /* this expect is debatable */
106 { 109 {
107 --res; 110 assert (("libev: poll() returned illegal result, broken BSD kernel?", p < polls + pollcnt));
108 111
112 if (expect_false (p->revents)) /* this expect is debatable */
113 {
114 --res;
115
109 if (expect_false (p->revents & POLLNVAL)) 116 if (expect_false (p->revents & POLLNVAL))
110 fd_kill (EV_A_ p->fd); 117 fd_kill (EV_A_ p->fd);
111 else 118 else
112 fd_event ( 119 fd_event (
113 EV_A_ 120 EV_A_
114 p->fd, 121 p->fd,
115 (p->revents & (POLLOUT | POLLERR | POLLHUP) ? EV_WRITE : 0) 122 (p->revents & (POLLOUT | POLLERR | POLLHUP) ? EV_WRITE : 0)
116 | (p->revents & (POLLIN | POLLERR | POLLHUP) ? EV_READ : 0) 123 | (p->revents & (POLLIN | POLLERR | POLLHUP) ? EV_READ : 0)
117 ); 124 );
118 } 125 }
126 }
119} 127}
120 128
121int inline_size 129int inline_size
122poll_init (EV_P_ int flags) 130poll_init (EV_P_ int flags)
123{ 131{
124 backend_fudge = 0.; /* posix says this is zero */ 132 backend_mintime = 1e-3;
125 backend_modify = poll_modify; 133 backend_modify = poll_modify;
126 backend_poll = poll_poll; 134 backend_poll = poll_poll;
127 135
128 pollidxs = 0; pollidxmax = 0; 136 pollidxs = 0; pollidxmax = 0;
129 polls = 0; pollmax = 0; pollcnt = 0; 137 polls = 0; pollmax = 0; pollcnt = 0;
130 138
131 return EVBACKEND_POLL; 139 return EVBACKEND_POLL;

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