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1 | /* |
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2 | * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions are |
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7 | * met: |
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8 | * |
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9 | * * Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * |
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12 | * * Redistributions in binary form must reproduce the above |
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13 | * copyright notice, this list of conditions and the following |
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14 | * disclaimer in the documentation and/or other materials provided |
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15 | * with the distribution. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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18 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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19 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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20 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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21 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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22 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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23 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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27 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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28 | */ |
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29 | |
1 | #include <sys/epoll.h> |
30 | #include <sys/epoll.h> |
2 | |
31 | |
3 | static int epoll_fd = -1; |
32 | static int epoll_fd = -1; |
4 | |
33 | |
5 | static void |
34 | static void |
… | |
… | |
11 | ev.data.fd = fd; |
40 | ev.data.fd = fd; |
12 | ev.events = |
41 | ev.events = |
13 | (nev & EV_READ ? EPOLLIN : 0) |
42 | (nev & EV_READ ? EPOLLIN : 0) |
14 | | (nev & EV_WRITE ? EPOLLOUT : 0); |
43 | | (nev & EV_WRITE ? EPOLLOUT : 0); |
15 | |
44 | |
16 | fprintf (stderr, "reify %d,%d,%d m%d (r=%d)\n", fd, oev, nev, mode,//D |
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17 | epoll_ctl (epoll_fd, mode, fd, &ev) |
45 | epoll_ctl (epoll_fd, mode, fd, &ev); |
18 | );//D |
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19 | } |
46 | } |
20 | |
47 | |
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48 | static void |
21 | void epoll_postfork_child (void) |
49 | epoll_postfork_child (void) |
22 | { |
50 | { |
23 | int fd; |
51 | int fd; |
24 | |
52 | |
25 | epoll_fd = epoll_create (256); |
53 | epoll_fd = epoll_create (256); |
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54 | fcntl (epoll_fd, F_SETFD, FD_CLOEXEC); |
26 | |
55 | |
27 | /* re-register interest in fds */ |
56 | /* re-register interest in fds */ |
28 | for (fd = 0; fd < anfdmax; ++fd) |
57 | for (fd = 0; fd < anfdmax; ++fd) |
29 | if (anfds [fd].wev) |
58 | if (anfds [fd].events && !(anfds [fd].events & EV_REIFY))//D |
30 | epoll_modify (fd, EV_NONE, anfds [fd].wev); |
59 | epoll_modify (fd, EV_NONE, anfds [fd].events); |
31 | } |
60 | } |
32 | |
61 | |
33 | static struct epoll_event *events; |
62 | static struct epoll_event *events; |
34 | static int eventmax; |
63 | static int eventmax; |
35 | |
64 | |
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65 | static void |
36 | static void epoll_poll (ev_tstamp timeout) |
66 | epoll_poll (ev_tstamp timeout) |
37 | { |
67 | { |
38 | int eventcnt = epoll_wait (epoll_fd, events, eventmax, ceil (timeout * 1000.)); |
68 | int eventcnt = epoll_wait (epoll_fd, events, eventmax, ceil (timeout * 1000.)); |
39 | int i; |
69 | int i; |
40 | |
70 | |
41 | if (eventcnt < 0) |
71 | if (eventcnt < 0) |
… | |
… | |
55 | eventmax += eventmax >> 1; |
85 | eventmax += eventmax >> 1; |
56 | events = malloc (sizeof (struct epoll_event) * eventmax); |
86 | events = malloc (sizeof (struct epoll_event) * eventmax); |
57 | } |
87 | } |
58 | } |
88 | } |
59 | |
89 | |
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90 | static void |
60 | int epoll_init (int flags) |
91 | epoll_init (int flags) |
61 | { |
92 | { |
62 | epoll_fd = epoll_create (256); |
93 | epoll_fd = epoll_create (256); |
63 | |
94 | |
64 | if (epoll_fd < 0) |
95 | if (epoll_fd < 0) |
65 | return 0; |
96 | return; |
66 | |
97 | |
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98 | fcntl (epoll_fd, F_SETFD, FD_CLOEXEC); |
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99 | |
67 | ev_method = EVMETHOD_EPOLL; |
100 | ev_method = EVMETHOD_EPOLL; |
68 | method_fudge = 1e-3; /* needed to compensate for epoll returning early */ |
101 | method_fudge = 1e-3; /* needed to compensate for epoll returning early */ |
69 | method_modify = epoll_modify; |
102 | method_modify = epoll_modify; |
70 | method_poll = epoll_poll; |
103 | method_poll = epoll_poll; |
71 | |
104 | |
72 | eventmax = 64; /* intiial number of events receivable per poll */ |
105 | eventmax = 64; /* intiial number of events receivable per poll */ |
73 | events = malloc (sizeof (struct epoll_event) * eventmax); |
106 | events = malloc (sizeof (struct epoll_event) * eventmax); |
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107 | } |
74 | |
108 | |
75 | return 1; |
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76 | } |
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