| 1 | /* |
1 | /* |
| 2 | * libev select fd activity backend |
2 | * libev select 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 | * |
| … | |
… | |
| 77 | SOCKET handle = anfds [fd].handle; |
77 | SOCKET handle = anfds [fd].handle; |
| 78 | #else |
78 | #else |
| 79 | int handle = fd; |
79 | int handle = fd; |
| 80 | #endif |
80 | #endif |
| 81 | |
81 | |
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82 | assert (("libev: fd >= FD_SETSIZE passed to fd_set-based select backend", fd < FD_SETSIZE)); |
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83 | |
| 82 | /* FD_SET is broken on windows (it adds the fd to a set twice or more, |
84 | /* FD_SET is broken on windows (it adds the fd to a set twice or more, |
| 83 | * which eventually leads to overflows). Need to call it only on changes. |
85 | * which eventually leads to overflows). Need to call it only on changes. |
| 84 | */ |
86 | */ |
| 85 | #if EV_SELECT_IS_WINSOCKET |
87 | #if EV_SELECT_IS_WINSOCKET |
| 86 | if ((oev ^ nev) & EV_READ) |
88 | if ((oev ^ nev) & EV_READ) |
| … | |
… | |
| 156 | * errors to be reported as an exception and not by setting |
158 | * errors to be reported as an exception and not by setting |
| 157 | * the writable bit. this is so uncontrollably lame. |
159 | * the writable bit. this is so uncontrollably lame. |
| 158 | */ |
160 | */ |
| 159 | memcpy (vec_eo, vec_wi, fd_setsize); |
161 | memcpy (vec_eo, vec_wi, fd_setsize); |
| 160 | res = select (vec_max * NFDBITS, (fd_set *)vec_ro, (fd_set *)vec_wo, (fd_set *)vec_eo, &tv); |
162 | res = select (vec_max * NFDBITS, (fd_set *)vec_ro, (fd_set *)vec_wo, (fd_set *)vec_eo, &tv); |
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163 | #elif EV_SELECT_USE_FD_SET |
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164 | fd_setsize = anfdmax < FD_SETSIZE ? anfdmax : FD_SETSIZE; |
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165 | res = select (fd_setsize, (fd_set *)vec_ro, (fd_set *)vec_wo, 0, &tv); |
| 161 | #else |
166 | #else |
| 162 | res = select (vec_max * NFDBITS, (fd_set *)vec_ro, (fd_set *)vec_wo, 0, &tv); |
167 | res = select (vec_max * NFDBITS, (fd_set *)vec_ro, (fd_set *)vec_wo, 0, &tv); |
| 163 | #endif |
168 | #endif |
| 164 | |
169 | |
| 165 | if (expect_false (res < 0)) |
170 | if (expect_false (res < 0)) |
| … | |
… | |
| 263 | backend_fudge = 0.; /* posix says this is zero */ |
268 | backend_fudge = 0.; /* posix says this is zero */ |
| 264 | backend_modify = select_modify; |
269 | backend_modify = select_modify; |
| 265 | backend_poll = select_poll; |
270 | backend_poll = select_poll; |
| 266 | |
271 | |
| 267 | #if EV_SELECT_USE_FD_SET |
272 | #if EV_SELECT_USE_FD_SET |
| 268 | vec_max = FD_SETSIZE / 32; |
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| 269 | vec_ri = ev_malloc (sizeof (fd_set)); FD_ZERO ((fd_set *)vec_ri); |
273 | vec_ri = ev_malloc (sizeof (fd_set)); FD_ZERO ((fd_set *)vec_ri); |
| 270 | vec_ro = ev_malloc (sizeof (fd_set)); |
274 | vec_ro = ev_malloc (sizeof (fd_set)); |
| 271 | vec_wi = ev_malloc (sizeof (fd_set)); FD_ZERO ((fd_set *)vec_wi); |
275 | vec_wi = ev_malloc (sizeof (fd_set)); FD_ZERO ((fd_set *)vec_wi); |
| 272 | vec_wo = ev_malloc (sizeof (fd_set)); |
276 | vec_wo = ev_malloc (sizeof (fd_set)); |
| 273 | #ifdef _WIN32 |
277 | #ifdef _WIN32 |
