| 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 | * |
| … | |
… | |
| 68 | /* |
68 | /* |
| 69 | * we handle EPOLL_CTL_DEL by ignoring it here |
69 | * we handle EPOLL_CTL_DEL by ignoring it here |
| 70 | * on the assumption that the fd is gone anyways |
70 | * on the assumption that the fd is gone anyways |
| 71 | * if that is wrong, we have to handle the spurious |
71 | * if that is wrong, we have to handle the spurious |
| 72 | * event in epoll_poll. |
72 | * event in epoll_poll. |
| 73 | * the fd is later added, we try to ADD it, and, if that |
73 | * if the fd is added again, we try to ADD it, and, if that |
| 74 | * fails, we assume it still has the same eventmask. |
74 | * fails, we assume it still has the same eventmask. |
| 75 | */ |
75 | */ |
| 76 | if (!nev) |
76 | if (!nev) |
| 77 | return; |
77 | return; |
| 78 | |
78 | |
| … | |
… | |
| 117 | |
117 | |
| 118 | static void |
118 | static void |
| 119 | epoll_poll (EV_P_ ev_tstamp timeout) |
119 | epoll_poll (EV_P_ ev_tstamp timeout) |
| 120 | { |
120 | { |
| 121 | int i; |
121 | int i; |
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122 | int eventcnt; |
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123 | |
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124 | EV_RELEASE_CB; |
| 122 | int eventcnt = epoll_wait (backend_fd, epoll_events, epoll_eventmax, (int)ceil (timeout * 1000.)); |
125 | eventcnt = epoll_wait (backend_fd, epoll_events, epoll_eventmax, (int)ceil (timeout * 1000.)); |
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126 | EV_ACQUIRE_CB; |
| 123 | |
127 | |
| 124 | if (expect_false (eventcnt < 0)) |
128 | if (expect_false (eventcnt < 0)) |
| 125 | { |
129 | { |
| 126 | if (errno != EINTR) |
130 | if (errno != EINTR) |
| 127 | ev_syserr ("(libev) epoll_wait"); |
131 | ev_syserr ("(libev) epoll_wait"); |
| … | |
… | |
| 175 | } |
179 | } |
| 176 | |
180 | |
| 177 | int inline_size |
181 | int inline_size |
| 178 | epoll_init (EV_P_ int flags) |
182 | epoll_init (EV_P_ int flags) |
| 179 | { |
183 | { |
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184 | #ifdef EPOLL_CLOEXEC |
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185 | backend_fd = epoll_create1 (EPOLL_CLOEXEC); |
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186 | |
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187 | if (backend_fd <= 0) |
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188 | #endif |
| 180 | backend_fd = epoll_create (256); |
189 | backend_fd = epoll_create (256); |
| 181 | |
190 | |
| 182 | if (backend_fd < 0) |
191 | if (backend_fd < 0) |
| 183 | return 0; |
192 | return 0; |
| 184 | |
193 | |
| 185 | fcntl (backend_fd, F_SETFD, FD_CLOEXEC); |
194 | fcntl (backend_fd, F_SETFD, FD_CLOEXEC); |
