| 1 | /* |
1 | /* |
| 2 | iom.C -- generic I/O multiplexer |
2 | iom.C -- generic I/O multiplexer |
| 3 | Copyright (C) 2003, 2004 Marc Lehmann <pcg@goof.com> |
3 | Copyright (C) 2003, 2004 Marc Lehmann <gvpe@schmorp.de> |
| 4 | |
4 | |
|
|
5 | This file is part of GVPE. |
|
|
6 | |
| 5 | This program is free software; you can redistribute it and/or modify |
7 | GVPE is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
8 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation; either version 2 of the License, or |
9 | the Free Software Foundation; either version 2 of the License, or |
| 8 | (at your option) any later version. |
10 | (at your option) any later version. |
| 9 | |
11 | |
| 10 | This program is distributed in the hope that it will be useful, |
12 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
15 | GNU General Public License for more details. |
| 14 | |
16 | |
| 15 | You should have received a copy of the GNU General Public License |
17 | You should have received a copy of the GNU General Public License |
| 16 | along with this program; if not, write to the Free Software |
18 | along with gvpe; if not, write to the Free Software |
| 17 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | */ |
20 | */ |
| 19 | |
21 | |
| 20 | #include "iom.h" |
22 | #include "iom.h" |
| 21 | |
23 | |
| 22 | #include <cstdio> |
24 | #include <cstdio> |
| … | |
… | |
| 33 | # include <time.h> |
35 | # include <time.h> |
| 34 | #endif |
36 | #endif |
| 35 | |
37 | |
| 36 | // for IOM_SIG |
38 | // for IOM_SIG |
| 37 | #if IOM_SIG |
39 | #if IOM_SIG |
| 38 | # include <signal.h> |
40 | # include <csignal> |
| 39 | # include <fcntl.h> |
41 | # include <fcntl.h> |
| 40 | #endif |
42 | #endif |
| 41 | |
43 | |
| 42 | // if the BSDs would at least be marginally POSIX-compatible.. *sigh* |
44 | // if the BSDs would at least be marginally POSIX-compatible.. *sigh* |
| 43 | // until that happens, sys/select.h must come last |
45 | // until that happens, sys/select.h must come last |
| 44 | #include <sys/select.h> |
46 | #include <sys/select.h> |
| 45 | |
|
|
| 46 | // TSTAMP_MAX must still fit into a positive struct timeval |
|
|
| 47 | #define TSTAMP_MAX (double)(1UL<<31) |
|
|
| 48 | |
47 | |
| 49 | #define TIMEVAL timeval |
48 | #define TIMEVAL timeval |
| 50 | #define TV_FRAC tv_usec |
49 | #define TV_FRAC tv_usec |
| 51 | #define TV_MULT 1000000L |
50 | #define TV_MULT 1000000L |
| 52 | |
51 | |
| … | |
… | |
| 136 | |
135 | |
| 137 | tw0.start (TSTAMP_MAX); |
136 | tw0.start (TSTAMP_MAX); |
| 138 | #endif |
137 | #endif |
| 139 | } |
138 | } |
| 140 | |
139 | |
|
|
140 | ~init () |
|
|
141 | { |
|
|
142 | iom_valid = false; |
|
|
143 | } |
|
|
144 | |
| 141 | static void required (); |
145 | static void required (); |
| 142 | } init; |
146 | } init; |
| 143 | |
147 | |
| 144 | void |
148 | void |
| 145 | init::required () |
149 | init::required () |
| … | |
… | |
| 380 | # if IOM_SIG |
384 | # if IOM_SIG |
| 381 | sigprocmask (SIG_BLOCK, &sigs, NULL); |
385 | sigprocmask (SIG_BLOCK, &sigs, NULL); |
| 382 | # endif |
386 | # endif |
| 383 | |
387 | |
| 384 | # if IOM_TIME |
388 | # if IOM_TIME |
|
|
389 | { |
|
|
390 | // update time, try to compensate for gross non-monotonic time changes |
|
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391 | tstamp diff = NOW; |
| 385 | set_now (); |
392 | set_now (); |
|
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393 | diff = NOW - diff; |
|
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394 | |
|
|
395 | if (diff < 0) |
|
|
396 | for (io_manager_vec<time_watcher>::const_iterator i = tw.end (); i-- > tw.begin (); ) |
|
|
397 | if (*i) |
|
|
398 | (*i)->at += diff; |
|
|
399 | } |
| 386 | # endif |
400 | # endif |
| 387 | |
401 | |
| 388 | if (fds > 0) |
402 | if (fds > 0) |
| 389 | { |
403 | { |
| 390 | # if IOM_SIG |
404 | # if IOM_SIG |
| … | |
… | |
| 414 | for (int i = iow.size (); i--; ) |
428 | for (int i = iow.size (); i--; ) |
| 415 | if (!iow[i]) |
429 | if (!iow[i]) |
| 416 | iow.erase_unordered (i); |
430 | iow.erase_unordered (i); |
| 417 | else |
431 | else |
| 418 | { |
432 | { |
|
|
433 | io_watcher &w = *iow[i]; |
| 419 | short revents = iow[i]->events; |
434 | short revents = w.events; |
| 420 | |
435 | |
| 421 | if (!FD_ISSET (iow[i]->fd, &rfd)) revents &= ~EVENT_READ; |
436 | if (!FD_ISSET (w.fd, &rfd)) revents &= ~EVENT_READ; |
| 422 | if (!FD_ISSET (iow[i]->fd, &wfd)) revents &= ~EVENT_WRITE; |
437 | if (!FD_ISSET (w.fd, &wfd)) revents &= ~EVENT_WRITE; |
| 423 | |
438 | |
| 424 | if (revents) |
439 | if (revents) |
| 425 | iow[i]->call (*iow[i], revents); |
440 | w.call (w, revents); |
| 426 | } |
441 | } |
| 427 | #endif |
442 | #endif |
| 428 | } |
443 | } |
| 429 | else if (fds < 0 && errno != EINTR) |
444 | else if (fds < 0 && errno != EINTR) |
| 430 | { |
445 | { |
