| 1 | /* |
1 | /* |
| 2 | * libev epoll fd activity backend |
2 | * libev epoll fd activity backend |
| 3 | * |
3 | * |
| 4 | * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de> |
4 | * Copyright (c) 2007,2008,2009 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 | * |
| … | |
… | |
| 119 | epoll_poll (EV_P_ ev_tstamp timeout) |
119 | epoll_poll (EV_P_ ev_tstamp timeout) |
| 120 | { |
120 | { |
| 121 | int i; |
121 | int i; |
| 122 | int eventcnt; |
122 | int eventcnt; |
| 123 | |
123 | |
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124 | /* epoll wait times cannot be larger than (LONG_MAX - 999UL) / HZ msecs, which is below */ |
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125 | /* the default libev max wait time, however. */ |
| 124 | EV_RELEASE_CB; |
126 | EV_RELEASE_CB; |
| 125 | eventcnt = epoll_wait (backend_fd, epoll_events, epoll_eventmax, (int)ceil (timeout * 1000.)); |
127 | eventcnt = epoll_wait (backend_fd, epoll_events, epoll_eventmax, (int)ceil (timeout * 1000.)); |
| 126 | EV_ACQUIRE_CB; |
128 | EV_ACQUIRE_CB; |
| 127 | |
129 | |
| 128 | if (expect_false (eventcnt < 0)) |
130 | if (expect_false (eventcnt < 0)) |
| … | |
… | |
| 157 | /* we received an event but are not interested in it, try mod or del */ |
159 | /* we received an event but are not interested in it, try mod or del */ |
| 158 | /* I don't think we ever need MOD, but let's handle it anyways */ |
160 | /* I don't think we ever need MOD, but let's handle it anyways */ |
| 159 | ev->events = (want & EV_READ ? EPOLLIN : 0) |
161 | ev->events = (want & EV_READ ? EPOLLIN : 0) |
| 160 | | (want & EV_WRITE ? EPOLLOUT : 0); |
162 | | (want & EV_WRITE ? EPOLLOUT : 0); |
| 161 | |
163 | |
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164 | /* pre-2.6.9 kernels require a non-null pointer with EPOLL_CTL_DEL, */ |
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165 | /* which is fortunately easy to do for us. */ |
| 162 | if (epoll_ctl (backend_fd, want ? EPOLL_CTL_MOD : EPOLL_CTL_DEL, fd, ev)) |
166 | if (epoll_ctl (backend_fd, want ? EPOLL_CTL_MOD : EPOLL_CTL_DEL, fd, ev)) |
| 163 | { |
167 | { |
| 164 | postfork = 1; /* an error occured, recreate kernel state */ |
168 | postfork = 1; /* an error occured, recreate kernel state */ |
| 165 | continue; |
169 | continue; |
| 166 | } |
170 | } |
| … | |
… | |
| 179 | } |
183 | } |
| 180 | |
184 | |
| 181 | int inline_size |
185 | int inline_size |
| 182 | epoll_init (EV_P_ int flags) |
186 | epoll_init (EV_P_ int flags) |
| 183 | { |
187 | { |
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|
188 | #ifdef EPOLL_CLOEXEC |
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189 | backend_fd = epoll_create1 (EPOLL_CLOEXEC); |
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190 | |
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191 | if (backend_fd <= 0) |
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192 | #endif |
| 184 | backend_fd = epoll_create (256); |
193 | backend_fd = epoll_create (256); |
| 185 | |
194 | |
| 186 | if (backend_fd < 0) |
195 | if (backend_fd < 0) |
| 187 | return 0; |
196 | return 0; |
| 188 | |
197 | |
| 189 | fcntl (backend_fd, F_SETFD, FD_CLOEXEC); |
198 | fcntl (backend_fd, F_SETFD, FD_CLOEXEC); |
