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Comparing libev/ev_select.c (file contents):
Revision 1.44 by root, Fri Jul 10 00:36:21 2009 UTC vs.
Revision 1.54 by root, Fri Jun 3 00:04:52 2011 UTC

1/* 1/*
2 * libev select fd activity backend 2 * libev select fd activity backend
3 * 3 *
4 * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011 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 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
37 * either the BSD or the GPL. 37 * either the BSD or the GPL.
38 */ 38 */
39 39
40#ifndef _WIN32 40#ifndef _WIN32
41/* for unix systems */ 41/* for unix systems */
42# include <sys/select.h>
43# include <inttypes.h> 42# include <inttypes.h>
43# ifndef __hpux
44/* for REAL unix systems */
45# include <sys/select.h>
46# endif
44#endif 47#endif
45 48
46#ifndef EV_SELECT_USE_FD_SET 49#ifndef EV_SELECT_USE_FD_SET
47# ifdef NFDBITS 50# ifdef NFDBITS
48# define EV_SELECT_USE_FD_SET 0 51# define EV_SELECT_USE_FD_SET 0
… …
138{ 141{
139 struct timeval tv; 142 struct timeval tv;
140 int res; 143 int res;
141 int fd_setsize; 144 int fd_setsize;
142 145
143 EV_SUSPEND_CB; 146 EV_RELEASE_CB;
144 tv.tv_sec = (long)timeout; 147 EV_TV_SET (tv, timeout);
145 tv.tv_usec = (long)((timeout - (ev_tstamp)tv.tv_sec) * 1e6);
146 148
147#if EV_SELECT_USE_FD_SET 149#if EV_SELECT_USE_FD_SET
148 fd_setsize = sizeof (fd_set); 150 fd_setsize = sizeof (fd_set);
149#else 151#else
150 fd_setsize = vec_max * NFDBYTES; 152 fd_setsize = vec_max * NFDBYTES;
… …
165 fd_setsize = anfdmax < FD_SETSIZE ? anfdmax : FD_SETSIZE; 167 fd_setsize = anfdmax < FD_SETSIZE ? anfdmax : FD_SETSIZE;
166 res = select (fd_setsize, (fd_set *)vec_ro, (fd_set *)vec_wo, 0, &tv); 168 res = select (fd_setsize, (fd_set *)vec_ro, (fd_set *)vec_wo, 0, &tv);
167#else 169#else
168 res = select (vec_max * NFDBITS, (fd_set *)vec_ro, (fd_set *)vec_wo, 0, &tv); 170 res = select (vec_max * NFDBITS, (fd_set *)vec_ro, (fd_set *)vec_wo, 0, &tv);
169#endif 171#endif
170 EV_RESUME_CB; 172 EV_ACQUIRE_CB;
171 173
172 if (expect_false (res < 0)) 174 if (expect_false (res < 0))
173 { 175 {
174 #if EV_SELECT_IS_WINSOCKET 176 #if EV_SELECT_IS_WINSOCKET
175 errno = WSAGetLastError (); 177 errno = WSAGetLastError ();
… …
182 else 184 else
183 errno -= WSABASEERR; 185 errno -= WSABASEERR;
184 #endif 186 #endif
185 187
186 #ifdef _WIN32 188 #ifdef _WIN32
187 /* select on windows errornously returns EINVAL when no fd sets have been 189 /* select on windows erroneously returns EINVAL when no fd sets have been
188 * provided (this is documented). what microsoft doesn't tell you that this bug 190 * provided (this is documented). what microsoft doesn't tell you that this bug
189 * exists even when the fd sets _are_ provided, so we have to check for this bug 191 * exists even when the fd sets _are_ provided, so we have to check for this bug
190 * here and emulate by sleeping manually. 192 * here and emulate by sleeping manually.
191 * we also get EINVAL when the timeout is invalid, but we ignore this case here 193 * we also get EINVAL when the timeout is invalid, but we ignore this case here
192 * and assume that EINVAL always means: you have to wait manually. 194 * and assume that EINVAL always means: you have to wait manually.
193 */ 195 */
194 if (errno == EINVAL) 196 if (errno == EINVAL)
195 { 197 {
196 ev_sleep (timeout); 198 if (timeout)
199 {
200 unsigned long ms = timeout * 1e3;
201 Sleep (ms ? ms : 1);
202 }
203
197 return; 204 return;
198 } 205 }
199 #endif 206 #endif
200 207
201 if (errno == EBADF) 208 if (errno == EBADF)
… …
265} 272}
266 273
267int inline_size 274int inline_size
268select_init (EV_P_ int flags) 275select_init (EV_P_ int flags)
269{ 276{
270 backend_fudge = 0.; /* posix says this is zero */ 277 backend_fudge = 1e-6;
271 backend_modify = select_modify; 278 backend_modify = select_modify;
272 backend_poll = select_poll; 279 backend_poll = select_poll;
273 280
274#if EV_SELECT_USE_FD_SET 281#if EV_SELECT_USE_FD_SET
275 vec_ri = ev_malloc (sizeof (fd_set)); FD_ZERO ((fd_set *)vec_ri); 282 vec_ri = ev_malloc (sizeof (fd_set)); FD_ZERO ((fd_set *)vec_ri);
… …
279 #ifdef _WIN32 286 #ifdef _WIN32
280 vec_eo = ev_malloc (sizeof (fd_set)); 287 vec_eo = ev_malloc (sizeof (fd_set));
281 #endif 288 #endif
282#else 289#else
283 vec_max = 0; 290 vec_max = 0;
284 vec_ri = 0; 291 vec_ri = 0;
285 vec_ri = 0; 292 vec_ro = 0;
293 vec_wi = 0;
286 vec_wo = 0; 294 vec_wo = 0;
295 #ifdef _WIN32
287 vec_wo = 0; 296 vec_eo = 0;
297 #endif
288#endif 298#endif
289 299
290 return EVBACKEND_SELECT; 300 return EVBACKEND_SELECT;
291} 301}
292 302
… …
295{ 305{
296 ev_free (vec_ri); 306 ev_free (vec_ri);
297 ev_free (vec_ro); 307 ev_free (vec_ro);
298 ev_free (vec_wi); 308 ev_free (vec_wi);
299 ev_free (vec_wo); 309 ev_free (vec_wo);
310 #ifdef _WIN32
311 ev_free (vec_eo);
312 #endif
300} 313}
301 314
302

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