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Comparing libev/ev_select.c (file contents):
Revision 1.40 by root, Tue Jan 6 19:46:56 2009 UTC vs.
Revision 1.56 by root, Thu Feb 18 04:48:05 2016 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
… …
70 if (oev == nev) 73 if (oev == nev)
71 return; 74 return;
72 75
73 { 76 {
74#if EV_SELECT_USE_FD_SET 77#if EV_SELECT_USE_FD_SET
75 assert (("libev: fd >= FD_SETSIZE passed to fd_set-based select backend", fd < FD_SETSIZE));
76 78
77 #if EV_SELECT_IS_WINSOCKET 79 #if EV_SELECT_IS_WINSOCKET
78 SOCKET handle = anfds [fd].handle; 80 SOCKET handle = anfds [fd].handle;
79 #else 81 #else
80 int handle = fd; 82 int handle = fd;
81 #endif 83 #endif
84
85 assert (("libev: fd >= FD_SETSIZE passed to fd_set-based select backend", fd < FD_SETSIZE));
82 86
83 /* FD_SET is broken on windows (it adds the fd to a set twice or more, 87 /* FD_SET is broken on windows (it adds the fd to a set twice or more,
84 * which eventually leads to overflows). Need to call it only on changes. 88 * which eventually leads to overflows). Need to call it only on changes.
85 */ 89 */
86 #if EV_SELECT_IS_WINSOCKET 90 #if EV_SELECT_IS_WINSOCKET
… …
137{ 141{
138 struct timeval tv; 142 struct timeval tv;
139 int res; 143 int res;
140 int fd_setsize; 144 int fd_setsize;
141 145
142 tv.tv_sec = (long)timeout; 146 EV_RELEASE_CB;
143 tv.tv_usec = (long)((timeout - (ev_tstamp)tv.tv_sec) * 1e6); 147 EV_TV_SET (tv, timeout);
144 148
145#if EV_SELECT_USE_FD_SET 149#if EV_SELECT_USE_FD_SET
146 fd_setsize = sizeof (fd_set); 150 fd_setsize = sizeof (fd_set);
147#else 151#else
148 fd_setsize = vec_max * NFDBYTES; 152 fd_setsize = vec_max * NFDBYTES;
… …
163 fd_setsize = anfdmax < FD_SETSIZE ? anfdmax : FD_SETSIZE; 167 fd_setsize = anfdmax < FD_SETSIZE ? anfdmax : FD_SETSIZE;
164 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);
165#else 169#else
166 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);
167#endif 171#endif
172 EV_ACQUIRE_CB;
168 173
169 if (expect_false (res < 0)) 174 if (expect_false (res < 0))
170 { 175 {
171 #if EV_SELECT_IS_WINSOCKET 176 #if EV_SELECT_IS_WINSOCKET
172 errno = WSAGetLastError (); 177 errno = WSAGetLastError ();
… …
179 else 184 else
180 errno -= WSABASEERR; 185 errno -= WSABASEERR;
181 #endif 186 #endif
182 187
183 #ifdef _WIN32 188 #ifdef _WIN32
184 /* 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
185 * 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
186 * 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
187 * here and emulate by sleeping manually. 192 * here and emulate by sleeping manually.
188 * 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
189 * and assume that EINVAL always means: you have to wait manually. 194 * and assume that EINVAL always means: you have to wait manually.
190 */ 195 */
191 if (errno == EINVAL) 196 if (errno == EINVAL)
192 { 197 {
193 ev_sleep (timeout); 198 if (timeout)
199 {
200 unsigned long ms = timeout * 1e3;
201 Sleep (ms ? ms : 1);
202 }
203
194 return; 204 return;
195 } 205 }
196 #endif 206 #endif
197 207
198 if (errno == EBADF) 208 if (errno == EBADF)
… …
259 } 269 }
260 270
261#endif 271#endif
262} 272}
263 273
264int inline_size 274inline_size
275int
265select_init (EV_P_ int flags) 276select_init (EV_P_ int flags)
266{ 277{
267 backend_fudge = 0.; /* posix says this is zero */ 278 backend_mintime = 1e-6;
268 backend_modify = select_modify; 279 backend_modify = select_modify;
269 backend_poll = select_poll; 280 backend_poll = select_poll;
270 281
271#if EV_SELECT_USE_FD_SET 282#if EV_SELECT_USE_FD_SET
272 vec_ri = ev_malloc (sizeof (fd_set)); FD_ZERO ((fd_set *)vec_ri); 283 vec_ri = ev_malloc (sizeof (fd_set)); FD_ZERO ((fd_set *)vec_ri);
273 vec_ro = ev_malloc (sizeof (fd_set)); 284 vec_ro = ev_malloc (sizeof (fd_set));
274 vec_wi = ev_malloc (sizeof (fd_set)); FD_ZERO ((fd_set *)vec_wi); 285 vec_wi = ev_malloc (sizeof (fd_set)); FD_ZERO ((fd_set *)vec_wi);
… …
276 #ifdef _WIN32 287 #ifdef _WIN32
277 vec_eo = ev_malloc (sizeof (fd_set)); 288 vec_eo = ev_malloc (sizeof (fd_set));
278 #endif 289 #endif
279#else 290#else
280 vec_max = 0; 291 vec_max = 0;
281 vec_ri = 0; 292 vec_ri = 0;
282 vec_ri = 0; 293 vec_ro = 0;
294 vec_wi = 0;
283 vec_wo = 0; 295 vec_wo = 0;
296 #ifdef _WIN32
284 vec_wo = 0; 297 vec_eo = 0;
298 #endif
285#endif 299#endif
286 300
287 return EVBACKEND_SELECT; 301 return EVBACKEND_SELECT;
288} 302}
289 303
290void inline_size 304inline_size
305void
291select_destroy (EV_P) 306select_destroy (EV_P)
292{ 307{
293 ev_free (vec_ri); 308 ev_free (vec_ri);
294 ev_free (vec_ro); 309 ev_free (vec_ro);
295 ev_free (vec_wi); 310 ev_free (vec_wi);
296 ev_free (vec_wo); 311 ev_free (vec_wo);
312 #ifdef _WIN32
313 ev_free (vec_eo);
314 #endif
297} 315}
298 316
299

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