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Paolo Bonzinid3b12f52011-09-13 10:30:52 +02001/*
2 * QEMU System Emulator
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
Paolo Bonzinid3b12f52011-09-13 10:30:52 +020024
Stefan Weil0ec024f2011-10-25 22:23:17 +020025#include "qemu-common.h"
Paolo Bonzini1de7afc2012-12-17 18:20:00 +010026#include "qemu/timer.h"
Stefan Weil0ec024f2011-10-25 22:23:17 +020027#include "slirp/slirp.h"
Paolo Bonzini1de7afc2012-12-17 18:20:00 +010028#include "qemu/main-loop.h"
Paolo Bonzini737e1502012-12-17 18:19:44 +010029#include "block/aio.h"
Paolo Bonzinid3b12f52011-09-13 10:30:52 +020030
31#ifndef _WIN32
32
Paolo Bonzini1de7afc2012-12-17 18:20:00 +010033#include "qemu/compatfd.h"
Stefan Weil0ec024f2011-10-25 22:23:17 +020034
Paolo Bonzinid3b12f52011-09-13 10:30:52 +020035/* If we have signalfd, we mask out the signals we want to handle and then
36 * use signalfd to listen for them. We rely on whatever the current signal
37 * handler is to dispatch the signals when we receive them.
38 */
39static void sigfd_handler(void *opaque)
40{
41 int fd = (intptr_t)opaque;
42 struct qemu_signalfd_siginfo info;
43 struct sigaction action;
44 ssize_t len;
45
46 while (1) {
47 do {
48 len = read(fd, &info, sizeof(info));
49 } while (len == -1 && errno == EINTR);
50
51 if (len == -1 && errno == EAGAIN) {
52 break;
53 }
54
55 if (len != sizeof(info)) {
56 printf("read from sigfd returned %zd: %m\n", len);
57 return;
58 }
59
60 sigaction(info.ssi_signo, NULL, &action);
61 if ((action.sa_flags & SA_SIGINFO) && action.sa_sigaction) {
62 action.sa_sigaction(info.ssi_signo,
63 (siginfo_t *)&info, NULL);
64 } else if (action.sa_handler) {
65 action.sa_handler(info.ssi_signo);
66 }
67 }
68}
69
70static int qemu_signal_init(void)
71{
72 int sigfd;
73 sigset_t set;
74
75 /*
76 * SIG_IPI must be blocked in the main thread and must not be caught
77 * by sigwait() in the signal thread. Otherwise, the cpu thread will
78 * not catch it reliably.
79 */
80 sigemptyset(&set);
81 sigaddset(&set, SIG_IPI);
Paolo Bonzinid3b12f52011-09-13 10:30:52 +020082 sigaddset(&set, SIGIO);
83 sigaddset(&set, SIGALRM);
84 sigaddset(&set, SIGBUS);
85 pthread_sigmask(SIG_BLOCK, &set, NULL);
86
Lai Jiangshan4aa75342012-01-12 17:05:35 +080087 sigdelset(&set, SIG_IPI);
Paolo Bonzinid3b12f52011-09-13 10:30:52 +020088 sigfd = qemu_signalfd(&set);
89 if (sigfd == -1) {
90 fprintf(stderr, "failed to create signalfd\n");
91 return -errno;
92 }
93
94 fcntl_setfl(sigfd, O_NONBLOCK);
95
96 qemu_set_fd_handler2(sigfd, NULL, sigfd_handler, NULL,
97 (void *)(intptr_t)sigfd);
98
99 return 0;
100}
101
102#else /* _WIN32 */
103
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200104static int qemu_signal_init(void)
105{
106 return 0;
107}
108#endif
109
Paolo Bonzinif627aab2012-10-29 23:45:23 +0100110static AioContext *qemu_aio_context;
111
Paolo Bonzini4c8d0d22010-05-24 17:27:14 +0200112void qemu_notify_event(void)
113{
114 if (!qemu_aio_context) {
115 return;
116 }
117 aio_notify(qemu_aio_context);
118}
119
Stefan Hajnoczicbff4b32013-02-20 11:28:25 +0100120static GArray *gpollfds;
121
Paolo Bonzini172061a2012-10-29 15:28:36 +0100122int qemu_init_main_loop(void)
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200123{
124 int ret;
Paolo Bonzini82cbbdc2012-09-24 15:07:08 +0200125 GSource *src;
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200126
Paolo Bonzini172061a2012-10-29 15:28:36 +0100127 init_clocks();
Paolo Bonzinif9ab4652012-11-02 15:43:23 +0100128 if (init_timer_alarm() < 0) {
129 fprintf(stderr, "could not initialize alarm timer\n");
130 exit(1);
131 }
Paolo Bonzini172061a2012-10-29 15:28:36 +0100132
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200133 ret = qemu_signal_init();
134 if (ret) {
135 return ret;
136 }
137
Stefan Hajnoczicbff4b32013-02-20 11:28:25 +0100138 gpollfds = g_array_new(FALSE, FALSE, sizeof(GPollFD));
Paolo Bonzinif627aab2012-10-29 23:45:23 +0100139 qemu_aio_context = aio_context_new();
Paolo Bonzini82cbbdc2012-09-24 15:07:08 +0200140 src = aio_get_g_source(qemu_aio_context);
141 g_source_attach(src, NULL);
142 g_source_unref(src);
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200143 return 0;
144}
145
Paolo Bonzini15455532012-03-20 10:49:18 +0100146static fd_set rfds, wfds, xfds;
147static int nfds;
Paolo Bonzini06ac7d42012-03-20 10:49:20 +0100148static GPollFD poll_fds[1024 * 2]; /* this is probably overkill */
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200149static int n_poll_fds;
150static int max_priority;
151
Stefan Hajnoczicbff4b32013-02-20 11:28:25 +0100152/* Load rfds/wfds/xfds into gpollfds. Will be removed a few commits later. */
153static void gpollfds_from_select(void)
154{
155 int fd;
156 for (fd = 0; fd <= nfds; fd++) {
157 int events = 0;
158 if (FD_ISSET(fd, &rfds)) {
159 events |= G_IO_IN | G_IO_HUP | G_IO_ERR;
160 }
161 if (FD_ISSET(fd, &wfds)) {
162 events |= G_IO_OUT | G_IO_ERR;
163 }
164 if (FD_ISSET(fd, &xfds)) {
165 events |= G_IO_PRI;
166 }
167 if (events) {
168 GPollFD pfd = {
169 .fd = fd,
170 .events = events,
171 };
172 g_array_append_val(gpollfds, pfd);
173 }
174 }
175}
176
177/* Store gpollfds revents into rfds/wfds/xfds. Will be removed a few commits
178 * later.
179 */
180static void gpollfds_to_select(int ret)
181{
182 int i;
183
184 FD_ZERO(&rfds);
185 FD_ZERO(&wfds);
186 FD_ZERO(&xfds);
187
188 if (ret <= 0) {
189 return;
190 }
191
192 for (i = 0; i < gpollfds->len; i++) {
193 int fd = g_array_index(gpollfds, GPollFD, i).fd;
194 int revents = g_array_index(gpollfds, GPollFD, i).revents;
195
196 if (revents & (G_IO_IN | G_IO_HUP | G_IO_ERR)) {
197 FD_SET(fd, &rfds);
198 }
199 if (revents & (G_IO_OUT | G_IO_ERR)) {
200 FD_SET(fd, &wfds);
201 }
202 if (revents & G_IO_PRI) {
203 FD_SET(fd, &xfds);
204 }
205 }
206}
207
Paolo Bonziniea26ce72012-03-20 10:49:21 +0100208#ifndef _WIN32
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200209static void glib_select_fill(int *max_fd, fd_set *rfds, fd_set *wfds,
Stefano Stabellini7c7db752012-04-13 19:35:04 +0100210 fd_set *xfds, uint32_t *cur_timeout)
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200211{
212 GMainContext *context = g_main_context_default();
213 int i;
Paolo Bonzini4dae83a2012-03-20 10:49:17 +0100214 int timeout = 0;
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200215
216 g_main_context_prepare(context, &max_priority);
217
218 n_poll_fds = g_main_context_query(context, max_priority, &timeout,
219 poll_fds, ARRAY_SIZE(poll_fds));
220 g_assert(n_poll_fds <= ARRAY_SIZE(poll_fds));
221
222 for (i = 0; i < n_poll_fds; i++) {
223 GPollFD *p = &poll_fds[i];
224
225 if ((p->events & G_IO_IN)) {
226 FD_SET(p->fd, rfds);
227 *max_fd = MAX(*max_fd, p->fd);
228 }
229 if ((p->events & G_IO_OUT)) {
230 FD_SET(p->fd, wfds);
231 *max_fd = MAX(*max_fd, p->fd);
232 }
233 if ((p->events & G_IO_ERR)) {
234 FD_SET(p->fd, xfds);
235 *max_fd = MAX(*max_fd, p->fd);
236 }
237 }
238
Paolo Bonzini4dae83a2012-03-20 10:49:17 +0100239 if (timeout >= 0 && timeout < *cur_timeout) {
240 *cur_timeout = timeout;
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200241 }
242}
243
244static void glib_select_poll(fd_set *rfds, fd_set *wfds, fd_set *xfds,
245 bool err)
246{
247 GMainContext *context = g_main_context_default();
248
249 if (!err) {
250 int i;
251
252 for (i = 0; i < n_poll_fds; i++) {
253 GPollFD *p = &poll_fds[i];
254
255 if ((p->events & G_IO_IN) && FD_ISSET(p->fd, rfds)) {
256 p->revents |= G_IO_IN;
257 }
258 if ((p->events & G_IO_OUT) && FD_ISSET(p->fd, wfds)) {
259 p->revents |= G_IO_OUT;
260 }
261 if ((p->events & G_IO_ERR) && FD_ISSET(p->fd, xfds)) {
262 p->revents |= G_IO_ERR;
263 }
264 }
265 }
266
267 if (g_main_context_check(context, max_priority, poll_fds, n_poll_fds)) {
268 g_main_context_dispatch(context);
269 }
270}
271
Stefano Stabellini7c7db752012-04-13 19:35:04 +0100272static int os_host_main_loop_wait(uint32_t timeout)
Paolo Bonzini15455532012-03-20 10:49:18 +0100273{
Paolo Bonzini15455532012-03-20 10:49:18 +0100274 int ret;
275
276 glib_select_fill(&nfds, &rfds, &wfds, &xfds, &timeout);
277
278 if (timeout > 0) {
279 qemu_mutex_unlock_iothread();
280 }
281
Stefan Hajnoczicbff4b32013-02-20 11:28:25 +0100282 /* We'll eventually drop fd_set completely. But for now we still have
283 * *_fill() and *_poll() functions that use rfds/wfds/xfds.
284 */
285 gpollfds_from_select();
286
287 ret = g_poll((GPollFD *)gpollfds->data, gpollfds->len, timeout);
288
289 gpollfds_to_select(ret);
Paolo Bonzini15455532012-03-20 10:49:18 +0100290
291 if (timeout > 0) {
292 qemu_mutex_lock_iothread();
293 }
294
295 glib_select_poll(&rfds, &wfds, &xfds, (ret < 0));
296 return ret;
297}
298#else
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200299/***********************************************************/
300/* Polling handling */
301
302typedef struct PollingEntry {
303 PollingFunc *func;
304 void *opaque;
305 struct PollingEntry *next;
306} PollingEntry;
307
308static PollingEntry *first_polling_entry;
309
310int qemu_add_polling_cb(PollingFunc *func, void *opaque)
311{
312 PollingEntry **ppe, *pe;
313 pe = g_malloc0(sizeof(PollingEntry));
314 pe->func = func;
315 pe->opaque = opaque;
316 for(ppe = &first_polling_entry; *ppe != NULL; ppe = &(*ppe)->next);
317 *ppe = pe;
318 return 0;
319}
320
321void qemu_del_polling_cb(PollingFunc *func, void *opaque)
322{
323 PollingEntry **ppe, *pe;
324 for(ppe = &first_polling_entry; *ppe != NULL; ppe = &(*ppe)->next) {
325 pe = *ppe;
326 if (pe->func == func && pe->opaque == opaque) {
327 *ppe = pe->next;
328 g_free(pe);
329 break;
330 }
331 }
332}
333
334/***********************************************************/
335/* Wait objects support */
336typedef struct WaitObjects {
337 int num;
Paolo Bonzini06ac7d42012-03-20 10:49:20 +0100338 int revents[MAXIMUM_WAIT_OBJECTS + 1];
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200339 HANDLE events[MAXIMUM_WAIT_OBJECTS + 1];
340 WaitObjectFunc *func[MAXIMUM_WAIT_OBJECTS + 1];
341 void *opaque[MAXIMUM_WAIT_OBJECTS + 1];
342} WaitObjects;
343
344static WaitObjects wait_objects = {0};
345
346int qemu_add_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque)
347{
348 WaitObjects *w = &wait_objects;
349 if (w->num >= MAXIMUM_WAIT_OBJECTS) {
350 return -1;
351 }
352 w->events[w->num] = handle;
353 w->func[w->num] = func;
354 w->opaque[w->num] = opaque;
Paolo Bonzini06ac7d42012-03-20 10:49:20 +0100355 w->revents[w->num] = 0;
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200356 w->num++;
357 return 0;
358}
359
360void qemu_del_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque)
361{
362 int i, found;
363 WaitObjects *w = &wait_objects;
364
365 found = 0;
366 for (i = 0; i < w->num; i++) {
367 if (w->events[i] == handle) {
368 found = 1;
369 }
370 if (found) {
371 w->events[i] = w->events[i + 1];
372 w->func[i] = w->func[i + 1];
373 w->opaque[i] = w->opaque[i + 1];
Paolo Bonzini06ac7d42012-03-20 10:49:20 +0100374 w->revents[i] = w->revents[i + 1];
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200375 }
376 }
377 if (found) {
378 w->num--;
379 }
380}
381
Paolo Bonzinid3385eb2012-03-20 10:49:19 +0100382void qemu_fd_register(int fd)
383{
Paolo Bonzini4c8d0d22010-05-24 17:27:14 +0200384 WSAEventSelect(fd, event_notifier_get_handle(&qemu_aio_context->notifier),
385 FD_READ | FD_ACCEPT | FD_CLOSE |
Paolo Bonzinid3385eb2012-03-20 10:49:19 +0100386 FD_CONNECT | FD_WRITE | FD_OOB);
387}
388
Stefan Hajnoczicbff4b32013-02-20 11:28:25 +0100389static int pollfds_fill(GArray *pollfds, fd_set *rfds, fd_set *wfds,
390 fd_set *xfds)
391{
392 int nfds = -1;
393 int i;
394
395 for (i = 0; i < pollfds->len; i++) {
396 GPollFD *pfd = &g_array_index(pollfds, GPollFD, i);
397 int fd = pfd->fd;
398 int events = pfd->events;
399 if (events & (G_IO_IN | G_IO_HUP | G_IO_ERR)) {
400 FD_SET(fd, rfds);
401 nfds = MAX(nfds, fd);
402 }
403 if (events & (G_IO_OUT | G_IO_ERR)) {
404 FD_SET(fd, wfds);
405 nfds = MAX(nfds, fd);
406 }
407 if (events & G_IO_PRI) {
408 FD_SET(fd, xfds);
409 nfds = MAX(nfds, fd);
410 }
411 }
412 return nfds;
413}
414
415static void pollfds_poll(GArray *pollfds, int nfds, fd_set *rfds,
416 fd_set *wfds, fd_set *xfds)
417{
418 int i;
419
420 for (i = 0; i < pollfds->len; i++) {
421 GPollFD *pfd = &g_array_index(pollfds, GPollFD, i);
422 int fd = pfd->fd;
423 int revents = 0;
424
425 if (FD_ISSET(fd, rfds)) {
426 revents |= G_IO_IN | G_IO_HUP | G_IO_ERR;
427 }
428 if (FD_ISSET(fd, wfds)) {
429 revents |= G_IO_OUT | G_IO_ERR;
430 }
431 if (FD_ISSET(fd, xfds)) {
432 revents |= G_IO_PRI;
433 }
434 pfd->revents = revents & pfd->events;
435 }
436}
437
Stefano Stabellini7c7db752012-04-13 19:35:04 +0100438static int os_host_main_loop_wait(uint32_t timeout)
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200439{
Paolo Bonziniea26ce72012-03-20 10:49:21 +0100440 GMainContext *context = g_main_context_default();
Stefan Hajnoczi134a03e2013-02-20 11:28:24 +0100441 int select_ret = 0;
442 int g_poll_ret, ret, i;
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200443 PollingEntry *pe;
Paolo Bonzinid3385eb2012-03-20 10:49:19 +0100444 WaitObjects *w = &wait_objects;
Stefan Weil42fe1c22012-04-27 17:02:08 +0200445 gint poll_timeout;
Paolo Bonzini15455532012-03-20 10:49:18 +0100446 static struct timeval tv0;
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200447
448 /* XXX: need to suppress polling by better using win32 events */
449 ret = 0;
450 for (pe = first_polling_entry; pe != NULL; pe = pe->next) {
451 ret |= pe->func(pe->opaque);
452 }
Paolo Bonzinid3385eb2012-03-20 10:49:19 +0100453 if (ret != 0) {
454 return ret;
455 }
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200456
Paolo Bonziniea26ce72012-03-20 10:49:21 +0100457 g_main_context_prepare(context, &max_priority);
Stefan Weil42fe1c22012-04-27 17:02:08 +0200458 n_poll_fds = g_main_context_query(context, max_priority, &poll_timeout,
Paolo Bonziniea26ce72012-03-20 10:49:21 +0100459 poll_fds, ARRAY_SIZE(poll_fds));
460 g_assert(n_poll_fds <= ARRAY_SIZE(poll_fds));
461
Paolo Bonzini06ac7d42012-03-20 10:49:20 +0100462 for (i = 0; i < w->num; i++) {
Stefan Weil58b96302012-04-12 20:42:34 +0200463 poll_fds[n_poll_fds + i].fd = (DWORD_PTR)w->events[i];
Paolo Bonziniea26ce72012-03-20 10:49:21 +0100464 poll_fds[n_poll_fds + i].events = G_IO_IN;
Paolo Bonzinid3385eb2012-03-20 10:49:19 +0100465 }
466
Stefan Weil3239ad02012-04-29 19:15:02 +0200467 if (poll_timeout < 0 || timeout < poll_timeout) {
468 poll_timeout = timeout;
469 }
470
Paolo Bonzini06ac7d42012-03-20 10:49:20 +0100471 qemu_mutex_unlock_iothread();
Fabien Chouteau5e3bc732013-01-08 16:30:56 +0100472 g_poll_ret = g_poll(poll_fds, n_poll_fds + w->num, poll_timeout);
Paolo Bonzini06ac7d42012-03-20 10:49:20 +0100473 qemu_mutex_lock_iothread();
Fabien Chouteau5e3bc732013-01-08 16:30:56 +0100474 if (g_poll_ret > 0) {
Paolo Bonzini06ac7d42012-03-20 10:49:20 +0100475 for (i = 0; i < w->num; i++) {
Paolo Bonziniea26ce72012-03-20 10:49:21 +0100476 w->revents[i] = poll_fds[n_poll_fds + i].revents;
Paolo Bonzini06ac7d42012-03-20 10:49:20 +0100477 }
478 for (i = 0; i < w->num; i++) {
479 if (w->revents[i] && w->func[i]) {
480 w->func[i](w->opaque[i]);
481 }
482 }
483 }
Paolo Bonzinid3385eb2012-03-20 10:49:19 +0100484
Paolo Bonziniea26ce72012-03-20 10:49:21 +0100485 if (g_main_context_check(context, max_priority, poll_fds, n_poll_fds)) {
486 g_main_context_dispatch(context);
487 }
488
Fabien Chouteau5e3bc732013-01-08 16:30:56 +0100489 /* Call select after g_poll to avoid a useless iteration and therefore
490 * improve socket latency.
Paolo Bonzinid3385eb2012-03-20 10:49:19 +0100491 */
492
Stefan Hajnoczicbff4b32013-02-20 11:28:25 +0100493 /* This back-and-forth between GPollFDs and select(2) is temporary. We'll
494 * drop it in a couple of patches, I promise :).
495 */
496 gpollfds_from_select();
497 FD_ZERO(&rfds);
498 FD_ZERO(&wfds);
499 FD_ZERO(&xfds);
500 nfds = pollfds_fill(gpollfds, &rfds, &wfds, &xfds);
Fabien Chouteau5e3bc732013-01-08 16:30:56 +0100501 if (nfds >= 0) {
502 select_ret = select(nfds + 1, &rfds, &wfds, &xfds, &tv0);
503 if (select_ret != 0) {
504 timeout = 0;
505 }
Stefan Hajnoczicbff4b32013-02-20 11:28:25 +0100506 if (select_ret > 0) {
507 pollfds_poll(gpollfds, nfds, &rfds, &wfds, &xfds);
508 }
Fabien Chouteau5e3bc732013-01-08 16:30:56 +0100509 }
Stefan Hajnoczicbff4b32013-02-20 11:28:25 +0100510 gpollfds_to_select(select_ret);
Fabien Chouteau5e3bc732013-01-08 16:30:56 +0100511
512 return select_ret || g_poll_ret;
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200513}
514#endif
515
516int main_loop_wait(int nonblocking)
517{
Stefano Stabellini7c7db752012-04-13 19:35:04 +0100518 int ret;
519 uint32_t timeout = UINT32_MAX;
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200520
521 if (nonblocking) {
522 timeout = 0;
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200523 }
524
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200525 /* poll any events */
Stefan Hajnoczicbff4b32013-02-20 11:28:25 +0100526 g_array_set_size(gpollfds, 0); /* reset for new iteration */
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200527 /* XXX: separate device handlers from system ones */
528 nfds = -1;
529 FD_ZERO(&rfds);
530 FD_ZERO(&wfds);
531 FD_ZERO(&xfds);
532
533#ifdef CONFIG_SLIRP
Stefano Stabellini7c7db752012-04-13 19:35:04 +0100534 slirp_update_timeout(&timeout);
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200535 slirp_select_fill(&nfds, &rfds, &wfds, &xfds);
536#endif
537 qemu_iohandler_fill(&nfds, &rfds, &wfds, &xfds);
Paolo Bonzini15455532012-03-20 10:49:18 +0100538 ret = os_host_main_loop_wait(timeout);
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200539 qemu_iohandler_poll(&rfds, &wfds, &xfds, ret);
540#ifdef CONFIG_SLIRP
541 slirp_select_poll(&rfds, &wfds, &xfds, (ret < 0));
542#endif
543
544 qemu_run_all_timers();
545
Paolo Bonzinid3b12f52011-09-13 10:30:52 +0200546 return ret;
547}
Paolo Bonzinif627aab2012-10-29 23:45:23 +0100548
549/* Functions to operate on the main QEMU AioContext. */
550
551QEMUBH *qemu_bh_new(QEMUBHFunc *cb, void *opaque)
552{
553 return aio_bh_new(qemu_aio_context, cb, opaque);
554}
555
Paolo Bonzinia915f4b2012-09-13 12:28:51 +0200556bool qemu_aio_wait(void)
557{
Paolo Bonzini7c0628b2012-09-24 14:37:53 +0200558 return aio_poll(qemu_aio_context, true);
Paolo Bonzinia915f4b2012-09-13 12:28:51 +0200559}
560
Paolo Bonzinif42b2202012-06-09 04:01:51 +0200561#ifdef CONFIG_POSIX
Paolo Bonzinia915f4b2012-09-13 12:28:51 +0200562void qemu_aio_set_fd_handler(int fd,
563 IOHandler *io_read,
564 IOHandler *io_write,
565 AioFlushHandler *io_flush,
566 void *opaque)
567{
568 aio_set_fd_handler(qemu_aio_context, fd, io_read, io_write, io_flush,
569 opaque);
Paolo Bonzinia915f4b2012-09-13 12:28:51 +0200570}
Paolo Bonzini82cbbdc2012-09-24 15:07:08 +0200571#endif
Paolo Bonzinia915f4b2012-09-13 12:28:51 +0200572
Paolo Bonzinia915f4b2012-09-13 12:28:51 +0200573void qemu_aio_set_event_notifier(EventNotifier *notifier,
574 EventNotifierHandler *io_read,
575 AioFlushEventNotifierHandler *io_flush)
576{
Paolo Bonzini82cbbdc2012-09-24 15:07:08 +0200577 aio_set_event_notifier(qemu_aio_context, notifier, io_read, io_flush);
Paolo Bonzinia915f4b2012-09-13 12:28:51 +0200578}