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/cvs/libev/ev_select.c
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Comparing libev/ev_select.c (file contents):
Revision 1.39 by root, Mon Jan 5 14:41:35 2009 UTC vs.
Revision 1.46 by root, Sun Jul 19 04:06:13 2009 UTC

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
82 assert (("libev: fd >= FD_SETSIZE passed to fd_set-based select backend", fd < FD_SETSIZE));
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)
… …
136{ 138{
137 struct timeval tv; 139 struct timeval tv;
138 int res; 140 int res;
139 int fd_setsize; 141 int fd_setsize;
140 142
143 EV_RELEASE_CB;
141 tv.tv_sec = (long)timeout; 144 tv.tv_sec = (long)timeout;
142 tv.tv_usec = (long)((timeout - (ev_tstamp)tv.tv_sec) * 1e6); 145 tv.tv_usec = (long)((timeout - (ev_tstamp)tv.tv_sec) * 1e6);
143 146
144#if EV_SELECT_USE_FD_SET 147#if EV_SELECT_USE_FD_SET
145 fd_setsize = sizeof (fd_set); 148 fd_setsize = sizeof (fd_set);
… …
156 * errors to be reported as an exception and not by setting 159 * errors to be reported as an exception and not by setting
157 * the writable bit. this is so uncontrollably lame. 160 * the writable bit. this is so uncontrollably lame.
158 */ 161 */
159 memcpy (vec_eo, vec_wi, fd_setsize); 162 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); 163 res = select (vec_max * NFDBITS, (fd_set *)vec_ro, (fd_set *)vec_wo, (fd_set *)vec_eo, &tv);
164#elif EV_SELECT_USE_FD_SET
165 fd_setsize = anfdmax < FD_SETSIZE ? anfdmax : FD_SETSIZE;
166 res = select (fd_setsize, (fd_set *)vec_ro, (fd_set *)vec_wo, 0, &tv);
161#else 167#else
162 res = select (vec_max * NFDBITS, (fd_set *)vec_ro, (fd_set *)vec_wo, 0, &tv); 168 res = select (vec_max * NFDBITS, (fd_set *)vec_ro, (fd_set *)vec_wo, 0, &tv);
163#endif 169#endif
170 EV_ACQUIRE_CB;
164 171
165 if (expect_false (res < 0)) 172 if (expect_false (res < 0))
166 { 173 {
167 #if EV_SELECT_IS_WINSOCKET 174 #if EV_SELECT_IS_WINSOCKET
168 errno = WSAGetLastError (); 175 errno = WSAGetLastError ();
… …
263 backend_fudge = 0.; /* posix says this is zero */ 270 backend_fudge = 0.; /* posix says this is zero */
264 backend_modify = select_modify; 271 backend_modify = select_modify;
265 backend_poll = select_poll; 272 backend_poll = select_poll;
266 273
267#if EV_SELECT_USE_FD_SET 274#if EV_SELECT_USE_FD_SET
268 vec_max = FD_SETSIZE / 32;
269 vec_ri = ev_malloc (sizeof (fd_set)); FD_ZERO ((fd_set *)vec_ri); 275 vec_ri = ev_malloc (sizeof (fd_set)); FD_ZERO ((fd_set *)vec_ri);
270 vec_ro = ev_malloc (sizeof (fd_set)); 276 vec_ro = ev_malloc (sizeof (fd_set));
271 vec_wi = ev_malloc (sizeof (fd_set)); FD_ZERO ((fd_set *)vec_wi); 277 vec_wi = ev_malloc (sizeof (fd_set)); FD_ZERO ((fd_set *)vec_wi);
272 vec_wo = ev_malloc (sizeof (fd_set)); 278 vec_wo = ev_malloc (sizeof (fd_set));
273 #ifdef _WIN32 279 #ifdef _WIN32
274 vec_eo = ev_malloc (sizeof (fd_set)); 280 vec_eo = ev_malloc (sizeof (fd_set));
275 #endif 281 #endif
276#else 282#else
277 vec_max = 0; 283 vec_max = 0;
278 vec_ri = 0; 284 vec_ri = 0;
279 vec_ri = 0; 285 vec_ro = 0;
286 vec_wi = 0;
280 vec_wo = 0; 287 vec_wo = 0;
288 #ifdef _WIN32
281 vec_wo = 0; 289 vec_eo = 0;
290 #endif
282#endif 291#endif
283 292
284 return EVBACKEND_SELECT; 293 return EVBACKEND_SELECT;
285} 294}
286 295
… …
289{ 298{
290 ev_free (vec_ri); 299 ev_free (vec_ri);
291 ev_free (vec_ro); 300 ev_free (vec_ro);
292 ev_free (vec_wi); 301 ev_free (vec_wi);
293 ev_free (vec_wo); 302 ev_free (vec_wo);
303 #ifdef _WIN32
304 ev_free (vec_eo);
305 #endif
294} 306}
295 307
296 308

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