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Commit | Line | Data |
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d3b12f5d PB |
1 | /* |
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 | */ | |
d3b12f5d | 24 | |
0ec024f6 | 25 | #include "qemu-common.h" |
1de7afc9 | 26 | #include "qemu/timer.h" |
0ec024f6 | 27 | #include "slirp/slirp.h" |
1de7afc9 | 28 | #include "qemu/main-loop.h" |
737e150e | 29 | #include "block/aio.h" |
d3b12f5d PB |
30 | |
31 | #ifndef _WIN32 | |
32 | ||
1de7afc9 | 33 | #include "qemu/compatfd.h" |
0ec024f6 | 34 | |
d3b12f5d PB |
35 | /* 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 | */ | |
39 | static 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 | ||
70 | static 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); | |
d3b12f5d PB |
82 | sigaddset(&set, SIGIO); |
83 | sigaddset(&set, SIGALRM); | |
84 | sigaddset(&set, SIGBUS); | |
85 | pthread_sigmask(SIG_BLOCK, &set, NULL); | |
86 | ||
4aa7534d | 87 | sigdelset(&set, SIG_IPI); |
d3b12f5d PB |
88 | 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 | ||
4c8d0d27 | 104 | static int qemu_signal_init(void) |
d3b12f5d | 105 | { |
d3b12f5d PB |
106 | return 0; |
107 | } | |
4c8d0d27 PB |
108 | #endif |
109 | ||
110 | static AioContext *qemu_aio_context; | |
d3b12f5d PB |
111 | |
112 | void qemu_notify_event(void) | |
113 | { | |
4c8d0d27 | 114 | if (!qemu_aio_context) { |
ee77dfb2 MR |
115 | return; |
116 | } | |
4c8d0d27 | 117 | aio_notify(qemu_aio_context); |
d3b12f5d PB |
118 | } |
119 | ||
cbff4b34 SH |
120 | static GArray *gpollfds; |
121 | ||
172061a0 | 122 | int qemu_init_main_loop(void) |
d3b12f5d PB |
123 | { |
124 | int ret; | |
82cbbdc6 | 125 | GSource *src; |
d3b12f5d | 126 | |
172061a0 | 127 | init_clocks(); |
f9ab4654 PB |
128 | if (init_timer_alarm() < 0) { |
129 | fprintf(stderr, "could not initialize alarm timer\n"); | |
130 | exit(1); | |
131 | } | |
172061a0 | 132 | |
d3b12f5d PB |
133 | ret = qemu_signal_init(); |
134 | if (ret) { | |
135 | return ret; | |
136 | } | |
137 | ||
cbff4b34 | 138 | gpollfds = g_array_new(FALSE, FALSE, sizeof(GPollFD)); |
f627aab1 | 139 | qemu_aio_context = aio_context_new(); |
82cbbdc6 PB |
140 | src = aio_get_g_source(qemu_aio_context); |
141 | g_source_attach(src, NULL); | |
142 | g_source_unref(src); | |
d3b12f5d PB |
143 | return 0; |
144 | } | |
145 | ||
15455536 PB |
146 | static fd_set rfds, wfds, xfds; |
147 | static int nfds; | |
06ac7d49 | 148 | static GPollFD poll_fds[1024 * 2]; /* this is probably overkill */ |
d3b12f5d PB |
149 | static int n_poll_fds; |
150 | static int max_priority; | |
151 | ||
cbff4b34 SH |
152 | /* Load rfds/wfds/xfds into gpollfds. Will be removed a few commits later. */ |
153 | static 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 | */ | |
180 | static 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 | ||
ea26ce76 | 208 | #ifndef _WIN32 |
d3b12f5d | 209 | static void glib_select_fill(int *max_fd, fd_set *rfds, fd_set *wfds, |
7c7db755 | 210 | fd_set *xfds, uint32_t *cur_timeout) |
d3b12f5d PB |
211 | { |
212 | GMainContext *context = g_main_context_default(); | |
213 | int i; | |
4dae83ae | 214 | int timeout = 0; |
d3b12f5d PB |
215 | |
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 | ||
4dae83ae PB |
239 | if (timeout >= 0 && timeout < *cur_timeout) { |
240 | *cur_timeout = timeout; | |
d3b12f5d PB |
241 | } |
242 | } | |
243 | ||
244 | static 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 | ||
7c7db755 | 272 | static int os_host_main_loop_wait(uint32_t timeout) |
15455536 | 273 | { |
15455536 PB |
274 | int ret; |
275 | ||
276 | glib_select_fill(&nfds, &rfds, &wfds, &xfds, &timeout); | |
277 | ||
278 | if (timeout > 0) { | |
279 | qemu_mutex_unlock_iothread(); | |
280 | } | |
281 | ||
cbff4b34 SH |
282 | /* 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); | |
15455536 PB |
290 | |
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 | |
d3b12f5d PB |
299 | /***********************************************************/ |
300 | /* Polling handling */ | |
301 | ||
302 | typedef struct PollingEntry { | |
303 | PollingFunc *func; | |
304 | void *opaque; | |
305 | struct PollingEntry *next; | |
306 | } PollingEntry; | |
307 | ||
308 | static PollingEntry *first_polling_entry; | |
309 | ||
310 | int 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 | ||
321 | void 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 */ | |
336 | typedef struct WaitObjects { | |
337 | int num; | |
06ac7d49 | 338 | int revents[MAXIMUM_WAIT_OBJECTS + 1]; |
d3b12f5d PB |
339 | HANDLE events[MAXIMUM_WAIT_OBJECTS + 1]; |
340 | WaitObjectFunc *func[MAXIMUM_WAIT_OBJECTS + 1]; | |
341 | void *opaque[MAXIMUM_WAIT_OBJECTS + 1]; | |
342 | } WaitObjects; | |
343 | ||
344 | static WaitObjects wait_objects = {0}; | |
345 | ||
346 | int 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; | |
06ac7d49 | 355 | w->revents[w->num] = 0; |
d3b12f5d PB |
356 | w->num++; |
357 | return 0; | |
358 | } | |
359 | ||
360 | void 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]; | |
06ac7d49 | 374 | w->revents[i] = w->revents[i + 1]; |
d3b12f5d PB |
375 | } |
376 | } | |
377 | if (found) { | |
378 | w->num--; | |
379 | } | |
380 | } | |
381 | ||
d3385eb4 PB |
382 | void qemu_fd_register(int fd) |
383 | { | |
4c8d0d27 PB |
384 | WSAEventSelect(fd, event_notifier_get_handle(&qemu_aio_context->notifier), |
385 | FD_READ | FD_ACCEPT | FD_CLOSE | | |
d3385eb4 PB |
386 | FD_CONNECT | FD_WRITE | FD_OOB); |
387 | } | |
388 | ||
cbff4b34 SH |
389 | static 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 | ||
415 | static 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 | ||
7c7db755 | 438 | static int os_host_main_loop_wait(uint32_t timeout) |
d3b12f5d | 439 | { |
ea26ce76 | 440 | GMainContext *context = g_main_context_default(); |
134a03e0 SH |
441 | int select_ret = 0; |
442 | int g_poll_ret, ret, i; | |
d3b12f5d | 443 | PollingEntry *pe; |
d3385eb4 | 444 | WaitObjects *w = &wait_objects; |
42fe1c24 | 445 | gint poll_timeout; |
15455536 | 446 | static struct timeval tv0; |
d3b12f5d PB |
447 | |
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 | } | |
d3385eb4 PB |
453 | if (ret != 0) { |
454 | return ret; | |
455 | } | |
d3b12f5d | 456 | |
ea26ce76 | 457 | g_main_context_prepare(context, &max_priority); |
42fe1c24 | 458 | n_poll_fds = g_main_context_query(context, max_priority, &poll_timeout, |
ea26ce76 PB |
459 | poll_fds, ARRAY_SIZE(poll_fds)); |
460 | g_assert(n_poll_fds <= ARRAY_SIZE(poll_fds)); | |
461 | ||
06ac7d49 | 462 | for (i = 0; i < w->num; i++) { |
58b9630d | 463 | poll_fds[n_poll_fds + i].fd = (DWORD_PTR)w->events[i]; |
ea26ce76 | 464 | poll_fds[n_poll_fds + i].events = G_IO_IN; |
06ac7d49 PB |
465 | } |
466 | ||
3239ad04 SW |
467 | if (poll_timeout < 0 || timeout < poll_timeout) { |
468 | poll_timeout = timeout; | |
469 | } | |
470 | ||
d3385eb4 | 471 | qemu_mutex_unlock_iothread(); |
5e3bc735 | 472 | g_poll_ret = g_poll(poll_fds, n_poll_fds + w->num, poll_timeout); |
d3385eb4 | 473 | qemu_mutex_lock_iothread(); |
5e3bc735 | 474 | if (g_poll_ret > 0) { |
06ac7d49 | 475 | for (i = 0; i < w->num; i++) { |
ea26ce76 | 476 | w->revents[i] = poll_fds[n_poll_fds + i].revents; |
d3385eb4 | 477 | } |
06ac7d49 PB |
478 | for (i = 0; i < w->num; i++) { |
479 | if (w->revents[i] && w->func[i]) { | |
480 | w->func[i](w->opaque[i]); | |
d3b12f5d | 481 | } |
d3b12f5d PB |
482 | } |
483 | } | |
484 | ||
ea26ce76 PB |
485 | if (g_main_context_check(context, max_priority, poll_fds, n_poll_fds)) { |
486 | g_main_context_dispatch(context); | |
487 | } | |
488 | ||
5e3bc735 FC |
489 | /* Call select after g_poll to avoid a useless iteration and therefore |
490 | * improve socket latency. | |
d3385eb4 PB |
491 | */ |
492 | ||
cbff4b34 SH |
493 | /* 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); | |
5e3bc735 FC |
501 | if (nfds >= 0) { |
502 | select_ret = select(nfds + 1, &rfds, &wfds, &xfds, &tv0); | |
503 | if (select_ret != 0) { | |
504 | timeout = 0; | |
505 | } | |
cbff4b34 SH |
506 | if (select_ret > 0) { |
507 | pollfds_poll(gpollfds, nfds, &rfds, &wfds, &xfds); | |
508 | } | |
5e3bc735 | 509 | } |
cbff4b34 | 510 | gpollfds_to_select(select_ret); |
5e3bc735 FC |
511 | |
512 | return select_ret || g_poll_ret; | |
d3b12f5d PB |
513 | } |
514 | #endif | |
515 | ||
516 | int main_loop_wait(int nonblocking) | |
517 | { | |
7c7db755 SS |
518 | int ret; |
519 | uint32_t timeout = UINT32_MAX; | |
d3b12f5d PB |
520 | |
521 | if (nonblocking) { | |
522 | timeout = 0; | |
d3b12f5d PB |
523 | } |
524 | ||
d3b12f5d | 525 | /* poll any events */ |
cbff4b34 | 526 | g_array_set_size(gpollfds, 0); /* reset for new iteration */ |
d3b12f5d PB |
527 | /* 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 | |
7c7db755 | 534 | slirp_update_timeout(&timeout); |
d3b12f5d PB |
535 | slirp_select_fill(&nfds, &rfds, &wfds, &xfds); |
536 | #endif | |
537 | qemu_iohandler_fill(&nfds, &rfds, &wfds, &xfds); | |
15455536 | 538 | ret = os_host_main_loop_wait(timeout); |
d3b12f5d PB |
539 | 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 | ||
d3b12f5d PB |
546 | return ret; |
547 | } | |
f627aab1 PB |
548 | |
549 | /* Functions to operate on the main QEMU AioContext. */ | |
550 | ||
551 | QEMUBH *qemu_bh_new(QEMUBHFunc *cb, void *opaque) | |
552 | { | |
553 | return aio_bh_new(qemu_aio_context, cb, opaque); | |
554 | } | |
555 | ||
a915f4bc PB |
556 | bool qemu_aio_wait(void) |
557 | { | |
7c0628b2 | 558 | return aio_poll(qemu_aio_context, true); |
a915f4bc PB |
559 | } |
560 | ||
f42b2207 | 561 | #ifdef CONFIG_POSIX |
a915f4bc PB |
562 | void 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); | |
a915f4bc | 570 | } |
82cbbdc6 | 571 | #endif |
a915f4bc | 572 | |
a915f4bc PB |
573 | void qemu_aio_set_event_notifier(EventNotifier *notifier, |
574 | EventNotifierHandler *io_read, | |
575 | AioFlushEventNotifierHandler *io_flush) | |
576 | { | |
82cbbdc6 | 577 | aio_set_event_notifier(qemu_aio_context, notifier, io_read, io_flush); |
a915f4bc | 578 | } |