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Comparing libev/ev_select.c (file contents):
Revision 1.42 by root, Wed Jan 7 20:45:52 2009 UTC vs.
Revision 1.57 by root, Mon Jul 1 20:47:38 2019 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
… …
103#else 106#else
104 107
105 int word = fd / NFDBITS; 108 int word = fd / NFDBITS;
106 fd_mask mask = 1UL << (fd % NFDBITS); 109 fd_mask mask = 1UL << (fd % NFDBITS);
107 110
108 if (expect_false (vec_max <= word)) 111 if (ecb_expect_false (vec_max <= word))
109 { 112 {
110 int new_max = word + 1; 113 int new_max = word + 1;
111 114
112 vec_ri = ev_realloc (vec_ri, new_max * NFDBYTES); 115 vec_ri = ev_realloc (vec_ri, new_max * NFDBYTES);
113 vec_ro = ev_realloc (vec_ro, new_max * NFDBYTES); /* could free/malloc */ 116 vec_ro = ev_realloc (vec_ro, new_max * NFDBYTES); /* could free/malloc */
… …
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 tv.tv_sec = (long)timeout; 146 EV_RELEASE_CB;
144 tv.tv_usec = (long)((timeout - (ev_tstamp)tv.tv_sec) * 1e6); 147 EV_TV_SET (tv, timeout);
145 148
146#if EV_SELECT_USE_FD_SET 149#if EV_SELECT_USE_FD_SET
147 fd_setsize = sizeof (fd_set); 150 fd_setsize = sizeof (fd_set);
148#else 151#else
149 fd_setsize = vec_max * NFDBYTES; 152 fd_setsize = vec_max * NFDBYTES;
… …
164 fd_setsize = anfdmax < FD_SETSIZE ? anfdmax : FD_SETSIZE; 167 fd_setsize = anfdmax < FD_SETSIZE ? anfdmax : FD_SETSIZE;
165 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);
166#else 169#else
167 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);
168#endif 171#endif
172 EV_ACQUIRE_CB;
169 173
170 if (expect_false (res < 0)) 174 if (ecb_expect_false (res < 0))
171 { 175 {
172 #if EV_SELECT_IS_WINSOCKET 176 #if EV_SELECT_IS_WINSOCKET
173 errno = WSAGetLastError (); 177 errno = WSAGetLastError ();
174 #endif 178 #endif
175 #ifdef WSABASEERR 179 #ifdef WSABASEERR
… …
180 else 184 else
181 errno -= WSABASEERR; 185 errno -= WSABASEERR;
182 #endif 186 #endif
183 187
184 #ifdef _WIN32 188 #ifdef _WIN32
185 /* 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
186 * 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
187 * 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
188 * here and emulate by sleeping manually. 192 * here and emulate by sleeping manually.
189 * 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
190 * and assume that EINVAL always means: you have to wait manually. 194 * and assume that EINVAL always means: you have to wait manually.
191 */ 195 */
192 if (errno == EINVAL) 196 if (errno == EINVAL)
193 { 197 {
194 ev_sleep (timeout); 198 if (timeout)
199 {
200 unsigned long ms = timeout * 1e3;
201 Sleep (ms ? ms : 1);
202 }
203
195 return; 204 return;
196 } 205 }
197 #endif 206 #endif
198 207
199 if (errno == EBADF) 208 if (errno == EBADF)
… …
225 if (FD_ISSET (handle, (fd_set *)vec_wo)) events |= EV_WRITE; 234 if (FD_ISSET (handle, (fd_set *)vec_wo)) events |= EV_WRITE;
226 #ifdef _WIN32 235 #ifdef _WIN32
227 if (FD_ISSET (handle, (fd_set *)vec_eo)) events |= EV_WRITE; 236 if (FD_ISSET (handle, (fd_set *)vec_eo)) events |= EV_WRITE;
228 #endif 237 #endif
229 238
230 if (expect_true (events)) 239 if (ecb_expect_true (events))
231 fd_event (EV_A_ fd, events); 240 fd_event (EV_A_ fd, events);
232 } 241 }
233 } 242 }
234 243
235#else 244#else
… …
251 int events = 0; 260 int events = 0;
252 261
253 events |= word_r & mask ? EV_READ : 0; 262 events |= word_r & mask ? EV_READ : 0;
254 events |= word_w & mask ? EV_WRITE : 0; 263 events |= word_w & mask ? EV_WRITE : 0;
255 264
256 if (expect_true (events)) 265 if (ecb_expect_true (events))
257 fd_event (EV_A_ word * NFDBITS + bit, events); 266 fd_event (EV_A_ word * NFDBITS + bit, events);
258 } 267 }
259 } 268 }
260 } 269 }
261 270
262#endif 271#endif
263} 272}
264 273
265int inline_size 274inline_size
275int
266select_init (EV_P_ int flags) 276select_init (EV_P_ int flags)
267{ 277{
268 backend_fudge = 0.; /* posix says this is zero */ 278 backend_mintime = 1e-6;
269 backend_modify = select_modify; 279 backend_modify = select_modify;
270 backend_poll = select_poll; 280 backend_poll = select_poll;
271 281
272#if EV_SELECT_USE_FD_SET 282#if EV_SELECT_USE_FD_SET
273 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);
274 vec_ro = ev_malloc (sizeof (fd_set)); 284 vec_ro = ev_malloc (sizeof (fd_set));
275 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);
… …
277 #ifdef _WIN32 287 #ifdef _WIN32
278 vec_eo = ev_malloc (sizeof (fd_set)); 288 vec_eo = ev_malloc (sizeof (fd_set));
279 #endif 289 #endif
280#else 290#else
281 vec_max = 0; 291 vec_max = 0;
282 vec_ri = 0; 292 vec_ri = 0;
283 vec_ri = 0; 293 vec_ro = 0;
294 vec_wi = 0;
284 vec_wo = 0; 295 vec_wo = 0;
296 #ifdef _WIN32
285 vec_wo = 0; 297 vec_eo = 0;
298 #endif
286#endif 299#endif
287 300
288 return EVBACKEND_SELECT; 301 return EVBACKEND_SELECT;
289} 302}
290 303
291void inline_size 304inline_size
305void
292select_destroy (EV_P) 306select_destroy (EV_P)
293{ 307{
294 ev_free (vec_ri); 308 ev_free (vec_ri);
295 ev_free (vec_ro); 309 ev_free (vec_ro);
296 ev_free (vec_wi); 310 ev_free (vec_wi);
297 ev_free (vec_wo); 311 ev_free (vec_wo);
312 #ifdef _WIN32
313 ev_free (vec_eo);
314 #endif
298} 315}
299 316
300

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