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1 | d3b12f5d | Paolo Bonzini | /*
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2 | d3b12f5d | Paolo Bonzini | * QEMU System Emulator
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3 | d3b12f5d | Paolo Bonzini | *
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4 | d3b12f5d | Paolo Bonzini | * Copyright (c) 2003-2008 Fabrice Bellard
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5 | d3b12f5d | Paolo Bonzini | *
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6 | d3b12f5d | Paolo Bonzini | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | d3b12f5d | Paolo Bonzini | * of this software and associated documentation files (the "Software"), to deal
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8 | d3b12f5d | Paolo Bonzini | * in the Software without restriction, including without limitation the rights
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9 | d3b12f5d | Paolo Bonzini | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | d3b12f5d | Paolo Bonzini | * copies of the Software, and to permit persons to whom the Software is
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11 | d3b12f5d | Paolo Bonzini | * furnished to do so, subject to the following conditions:
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12 | d3b12f5d | Paolo Bonzini | *
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13 | d3b12f5d | Paolo Bonzini | * The above copyright notice and this permission notice shall be included in
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14 | d3b12f5d | Paolo Bonzini | * all copies or substantial portions of the Software.
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15 | d3b12f5d | Paolo Bonzini | *
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16 | d3b12f5d | Paolo Bonzini | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | d3b12f5d | Paolo Bonzini | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | d3b12f5d | Paolo Bonzini | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | d3b12f5d | Paolo Bonzini | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | d3b12f5d | Paolo Bonzini | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | d3b12f5d | Paolo Bonzini | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | d3b12f5d | Paolo Bonzini | * THE SOFTWARE.
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23 | d3b12f5d | Paolo Bonzini | */
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24 | d3b12f5d | Paolo Bonzini | |
25 | 0ec024f6 | Stefan Weil | #include "qemu-common.h" |
26 | 1de7afc9 | Paolo Bonzini | #include "qemu/timer.h" |
27 | 520b6dd4 | Michael Tokarev | #include "qemu/sockets.h" // struct in_addr needed for libslirp.h |
28 | 520b6dd4 | Michael Tokarev | #include "slirp/libslirp.h" |
29 | 1de7afc9 | Paolo Bonzini | #include "qemu/main-loop.h" |
30 | 737e150e | Paolo Bonzini | #include "block/aio.h" |
31 | d3b12f5d | Paolo Bonzini | |
32 | d3b12f5d | Paolo Bonzini | #ifndef _WIN32
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33 | d3b12f5d | Paolo Bonzini | |
34 | 1de7afc9 | Paolo Bonzini | #include "qemu/compatfd.h" |
35 | 0ec024f6 | Stefan Weil | |
36 | d3b12f5d | Paolo Bonzini | /* If we have signalfd, we mask out the signals we want to handle and then
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37 | d3b12f5d | Paolo Bonzini | * use signalfd to listen for them. We rely on whatever the current signal
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38 | d3b12f5d | Paolo Bonzini | * handler is to dispatch the signals when we receive them.
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39 | d3b12f5d | Paolo Bonzini | */
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40 | d3b12f5d | Paolo Bonzini | static void sigfd_handler(void *opaque) |
41 | d3b12f5d | Paolo Bonzini | { |
42 | d3b12f5d | Paolo Bonzini | int fd = (intptr_t)opaque;
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43 | d3b12f5d | Paolo Bonzini | struct qemu_signalfd_siginfo info;
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44 | d3b12f5d | Paolo Bonzini | struct sigaction action;
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45 | d3b12f5d | Paolo Bonzini | ssize_t len; |
46 | d3b12f5d | Paolo Bonzini | |
47 | d3b12f5d | Paolo Bonzini | while (1) { |
48 | d3b12f5d | Paolo Bonzini | do {
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49 | d3b12f5d | Paolo Bonzini | len = read(fd, &info, sizeof(info));
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50 | d3b12f5d | Paolo Bonzini | } while (len == -1 && errno == EINTR); |
51 | d3b12f5d | Paolo Bonzini | |
52 | d3b12f5d | Paolo Bonzini | if (len == -1 && errno == EAGAIN) { |
53 | d3b12f5d | Paolo Bonzini | break;
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54 | d3b12f5d | Paolo Bonzini | } |
55 | d3b12f5d | Paolo Bonzini | |
56 | d3b12f5d | Paolo Bonzini | if (len != sizeof(info)) { |
57 | d3b12f5d | Paolo Bonzini | printf("read from sigfd returned %zd: %m\n", len);
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58 | d3b12f5d | Paolo Bonzini | return;
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59 | d3b12f5d | Paolo Bonzini | } |
60 | d3b12f5d | Paolo Bonzini | |
61 | d3b12f5d | Paolo Bonzini | sigaction(info.ssi_signo, NULL, &action);
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62 | d3b12f5d | Paolo Bonzini | if ((action.sa_flags & SA_SIGINFO) && action.sa_sigaction) {
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63 | d3b12f5d | Paolo Bonzini | action.sa_sigaction(info.ssi_signo, |
64 | d3b12f5d | Paolo Bonzini | (siginfo_t *)&info, NULL);
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65 | d3b12f5d | Paolo Bonzini | } else if (action.sa_handler) { |
66 | d3b12f5d | Paolo Bonzini | action.sa_handler(info.ssi_signo); |
67 | d3b12f5d | Paolo Bonzini | } |
68 | d3b12f5d | Paolo Bonzini | } |
69 | d3b12f5d | Paolo Bonzini | } |
70 | d3b12f5d | Paolo Bonzini | |
71 | d3b12f5d | Paolo Bonzini | static int qemu_signal_init(void) |
72 | d3b12f5d | Paolo Bonzini | { |
73 | d3b12f5d | Paolo Bonzini | int sigfd;
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74 | d3b12f5d | Paolo Bonzini | sigset_t set; |
75 | d3b12f5d | Paolo Bonzini | |
76 | d3b12f5d | Paolo Bonzini | /*
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77 | d3b12f5d | Paolo Bonzini | * SIG_IPI must be blocked in the main thread and must not be caught
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78 | d3b12f5d | Paolo Bonzini | * by sigwait() in the signal thread. Otherwise, the cpu thread will
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79 | d3b12f5d | Paolo Bonzini | * not catch it reliably.
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80 | d3b12f5d | Paolo Bonzini | */
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81 | d3b12f5d | Paolo Bonzini | sigemptyset(&set); |
82 | d3b12f5d | Paolo Bonzini | sigaddset(&set, SIG_IPI); |
83 | d3b12f5d | Paolo Bonzini | sigaddset(&set, SIGIO); |
84 | d3b12f5d | Paolo Bonzini | sigaddset(&set, SIGALRM); |
85 | d3b12f5d | Paolo Bonzini | sigaddset(&set, SIGBUS); |
86 | d3b12f5d | Paolo Bonzini | pthread_sigmask(SIG_BLOCK, &set, NULL);
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87 | d3b12f5d | Paolo Bonzini | |
88 | 4aa7534d | Lai Jiangshan | sigdelset(&set, SIG_IPI); |
89 | d3b12f5d | Paolo Bonzini | sigfd = qemu_signalfd(&set); |
90 | d3b12f5d | Paolo Bonzini | if (sigfd == -1) { |
91 | d3b12f5d | Paolo Bonzini | fprintf(stderr, "failed to create signalfd\n");
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92 | d3b12f5d | Paolo Bonzini | return -errno;
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93 | d3b12f5d | Paolo Bonzini | } |
94 | d3b12f5d | Paolo Bonzini | |
95 | d3b12f5d | Paolo Bonzini | fcntl_setfl(sigfd, O_NONBLOCK); |
96 | d3b12f5d | Paolo Bonzini | |
97 | d3b12f5d | Paolo Bonzini | qemu_set_fd_handler2(sigfd, NULL, sigfd_handler, NULL, |
98 | d3b12f5d | Paolo Bonzini | (void *)(intptr_t)sigfd);
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99 | d3b12f5d | Paolo Bonzini | |
100 | d3b12f5d | Paolo Bonzini | return 0; |
101 | d3b12f5d | Paolo Bonzini | } |
102 | d3b12f5d | Paolo Bonzini | |
103 | d3b12f5d | Paolo Bonzini | #else /* _WIN32 */ |
104 | d3b12f5d | Paolo Bonzini | |
105 | 4c8d0d27 | Paolo Bonzini | static int qemu_signal_init(void) |
106 | d3b12f5d | Paolo Bonzini | { |
107 | d3b12f5d | Paolo Bonzini | return 0; |
108 | d3b12f5d | Paolo Bonzini | } |
109 | 4c8d0d27 | Paolo Bonzini | #endif
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110 | 4c8d0d27 | Paolo Bonzini | |
111 | 4c8d0d27 | Paolo Bonzini | static AioContext *qemu_aio_context;
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112 | d3b12f5d | Paolo Bonzini | |
113 | 5f3aa1ff | Stefan Hajnoczi | AioContext *qemu_get_aio_context(void)
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114 | 5f3aa1ff | Stefan Hajnoczi | { |
115 | 5f3aa1ff | Stefan Hajnoczi | return qemu_aio_context;
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116 | 5f3aa1ff | Stefan Hajnoczi | } |
117 | 5f3aa1ff | Stefan Hajnoczi | |
118 | d3b12f5d | Paolo Bonzini | void qemu_notify_event(void) |
119 | d3b12f5d | Paolo Bonzini | { |
120 | 4c8d0d27 | Paolo Bonzini | if (!qemu_aio_context) {
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121 | ee77dfb2 | Michael Roth | return;
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122 | ee77dfb2 | Michael Roth | } |
123 | 4c8d0d27 | Paolo Bonzini | aio_notify(qemu_aio_context); |
124 | d3b12f5d | Paolo Bonzini | } |
125 | d3b12f5d | Paolo Bonzini | |
126 | cbff4b34 | Stefan Hajnoczi | static GArray *gpollfds;
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127 | cbff4b34 | Stefan Hajnoczi | |
128 | 172061a0 | Paolo Bonzini | int qemu_init_main_loop(void) |
129 | d3b12f5d | Paolo Bonzini | { |
130 | d3b12f5d | Paolo Bonzini | int ret;
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131 | 82cbbdc6 | Paolo Bonzini | GSource *src; |
132 | d3b12f5d | Paolo Bonzini | |
133 | 172061a0 | Paolo Bonzini | init_clocks(); |
134 | 172061a0 | Paolo Bonzini | |
135 | d3b12f5d | Paolo Bonzini | ret = qemu_signal_init(); |
136 | d3b12f5d | Paolo Bonzini | if (ret) {
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137 | d3b12f5d | Paolo Bonzini | return ret;
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138 | d3b12f5d | Paolo Bonzini | } |
139 | d3b12f5d | Paolo Bonzini | |
140 | cbff4b34 | Stefan Hajnoczi | gpollfds = g_array_new(FALSE, FALSE, sizeof(GPollFD));
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141 | f627aab1 | Paolo Bonzini | qemu_aio_context = aio_context_new(); |
142 | 82cbbdc6 | Paolo Bonzini | src = aio_get_g_source(qemu_aio_context); |
143 | 82cbbdc6 | Paolo Bonzini | g_source_attach(src, NULL);
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144 | 82cbbdc6 | Paolo Bonzini | g_source_unref(src); |
145 | d3b12f5d | Paolo Bonzini | return 0; |
146 | d3b12f5d | Paolo Bonzini | } |
147 | d3b12f5d | Paolo Bonzini | |
148 | d3b12f5d | Paolo Bonzini | static int max_priority; |
149 | d3b12f5d | Paolo Bonzini | |
150 | ea26ce76 | Paolo Bonzini | #ifndef _WIN32
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151 | 48ce11ff | Stefan Hajnoczi | static int glib_pollfds_idx; |
152 | 48ce11ff | Stefan Hajnoczi | static int glib_n_poll_fds; |
153 | 48ce11ff | Stefan Hajnoczi | |
154 | 7b595f35 | Alex Bligh | static void glib_pollfds_fill(int64_t *cur_timeout) |
155 | d3b12f5d | Paolo Bonzini | { |
156 | d3b12f5d | Paolo Bonzini | GMainContext *context = g_main_context_default(); |
157 | 4dae83ae | Paolo Bonzini | int timeout = 0; |
158 | 7b595f35 | Alex Bligh | int64_t timeout_ns; |
159 | 48ce11ff | Stefan Hajnoczi | int n;
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160 | d3b12f5d | Paolo Bonzini | |
161 | d3b12f5d | Paolo Bonzini | g_main_context_prepare(context, &max_priority); |
162 | d3b12f5d | Paolo Bonzini | |
163 | 48ce11ff | Stefan Hajnoczi | glib_pollfds_idx = gpollfds->len; |
164 | 48ce11ff | Stefan Hajnoczi | n = glib_n_poll_fds; |
165 | 48ce11ff | Stefan Hajnoczi | do {
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166 | 48ce11ff | Stefan Hajnoczi | GPollFD *pfds; |
167 | 48ce11ff | Stefan Hajnoczi | glib_n_poll_fds = n; |
168 | 48ce11ff | Stefan Hajnoczi | g_array_set_size(gpollfds, glib_pollfds_idx + glib_n_poll_fds); |
169 | 48ce11ff | Stefan Hajnoczi | pfds = &g_array_index(gpollfds, GPollFD, glib_pollfds_idx); |
170 | 48ce11ff | Stefan Hajnoczi | n = g_main_context_query(context, max_priority, &timeout, pfds, |
171 | 48ce11ff | Stefan Hajnoczi | glib_n_poll_fds); |
172 | 48ce11ff | Stefan Hajnoczi | } while (n != glib_n_poll_fds);
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173 | d3b12f5d | Paolo Bonzini | |
174 | 7b595f35 | Alex Bligh | if (timeout < 0) { |
175 | 7b595f35 | Alex Bligh | timeout_ns = -1;
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176 | 7b595f35 | Alex Bligh | } else {
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177 | 7b595f35 | Alex Bligh | timeout_ns = (int64_t)timeout * (int64_t)SCALE_MS; |
178 | d3b12f5d | Paolo Bonzini | } |
179 | 7b595f35 | Alex Bligh | |
180 | 7b595f35 | Alex Bligh | *cur_timeout = qemu_soonest_timeout(timeout_ns, *cur_timeout); |
181 | d3b12f5d | Paolo Bonzini | } |
182 | d3b12f5d | Paolo Bonzini | |
183 | 48ce11ff | Stefan Hajnoczi | static void glib_pollfds_poll(void) |
184 | d3b12f5d | Paolo Bonzini | { |
185 | d3b12f5d | Paolo Bonzini | GMainContext *context = g_main_context_default(); |
186 | 48ce11ff | Stefan Hajnoczi | GPollFD *pfds = &g_array_index(gpollfds, GPollFD, glib_pollfds_idx); |
187 | d3b12f5d | Paolo Bonzini | |
188 | 48ce11ff | Stefan Hajnoczi | if (g_main_context_check(context, max_priority, pfds, glib_n_poll_fds)) {
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189 | d3b12f5d | Paolo Bonzini | g_main_context_dispatch(context); |
190 | d3b12f5d | Paolo Bonzini | } |
191 | d3b12f5d | Paolo Bonzini | } |
192 | d3b12f5d | Paolo Bonzini | |
193 | 893986fe | Anthony Liguori | #define MAX_MAIN_LOOP_SPIN (1000) |
194 | 893986fe | Anthony Liguori | |
195 | 7b595f35 | Alex Bligh | static int os_host_main_loop_wait(int64_t timeout) |
196 | 15455536 | Paolo Bonzini | { |
197 | 15455536 | Paolo Bonzini | int ret;
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198 | 893986fe | Anthony Liguori | static int spin_counter; |
199 | 15455536 | Paolo Bonzini | |
200 | 48ce11ff | Stefan Hajnoczi | glib_pollfds_fill(&timeout); |
201 | 15455536 | Paolo Bonzini | |
202 | 893986fe | Anthony Liguori | /* If the I/O thread is very busy or we are incorrectly busy waiting in
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203 | 893986fe | Anthony Liguori | * the I/O thread, this can lead to starvation of the BQL such that the
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204 | 893986fe | Anthony Liguori | * VCPU threads never run. To make sure we can detect the later case,
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205 | 893986fe | Anthony Liguori | * print a message to the screen. If we run into this condition, create
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206 | 893986fe | Anthony Liguori | * a fake timeout in order to give the VCPU threads a chance to run.
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207 | 893986fe | Anthony Liguori | */
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208 | 7b595f35 | Alex Bligh | if (!timeout && (spin_counter > MAX_MAIN_LOOP_SPIN)) {
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209 | 893986fe | Anthony Liguori | static bool notified; |
210 | 893986fe | Anthony Liguori | |
211 | 893986fe | Anthony Liguori | if (!notified) {
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212 | 893986fe | Anthony Liguori | fprintf(stderr, |
213 | 893986fe | Anthony Liguori | "main-loop: WARNING: I/O thread spun for %d iterations\n",
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214 | 893986fe | Anthony Liguori | MAX_MAIN_LOOP_SPIN); |
215 | 893986fe | Anthony Liguori | notified = true;
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216 | 893986fe | Anthony Liguori | } |
217 | 893986fe | Anthony Liguori | |
218 | 7b595f35 | Alex Bligh | timeout = SCALE_MS; |
219 | 893986fe | Anthony Liguori | } |
220 | 893986fe | Anthony Liguori | |
221 | 7b595f35 | Alex Bligh | if (timeout) {
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222 | 893986fe | Anthony Liguori | spin_counter = 0;
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223 | 15455536 | Paolo Bonzini | qemu_mutex_unlock_iothread(); |
224 | 893986fe | Anthony Liguori | } else {
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225 | 893986fe | Anthony Liguori | spin_counter++; |
226 | 15455536 | Paolo Bonzini | } |
227 | 15455536 | Paolo Bonzini | |
228 | 7b595f35 | Alex Bligh | ret = qemu_poll_ns((GPollFD *)gpollfds->data, gpollfds->len, timeout); |
229 | cbff4b34 | Stefan Hajnoczi | |
230 | 7b595f35 | Alex Bligh | if (timeout) {
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231 | 15455536 | Paolo Bonzini | qemu_mutex_lock_iothread(); |
232 | 15455536 | Paolo Bonzini | } |
233 | 15455536 | Paolo Bonzini | |
234 | 48ce11ff | Stefan Hajnoczi | glib_pollfds_poll(); |
235 | 15455536 | Paolo Bonzini | return ret;
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236 | 15455536 | Paolo Bonzini | } |
237 | 15455536 | Paolo Bonzini | #else
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238 | d3b12f5d | Paolo Bonzini | /***********************************************************/
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239 | d3b12f5d | Paolo Bonzini | /* Polling handling */
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240 | d3b12f5d | Paolo Bonzini | |
241 | d3b12f5d | Paolo Bonzini | typedef struct PollingEntry { |
242 | d3b12f5d | Paolo Bonzini | PollingFunc *func; |
243 | d3b12f5d | Paolo Bonzini | void *opaque;
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244 | d3b12f5d | Paolo Bonzini | struct PollingEntry *next;
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245 | d3b12f5d | Paolo Bonzini | } PollingEntry; |
246 | d3b12f5d | Paolo Bonzini | |
247 | d3b12f5d | Paolo Bonzini | static PollingEntry *first_polling_entry;
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248 | d3b12f5d | Paolo Bonzini | |
249 | d3b12f5d | Paolo Bonzini | int qemu_add_polling_cb(PollingFunc *func, void *opaque) |
250 | d3b12f5d | Paolo Bonzini | { |
251 | d3b12f5d | Paolo Bonzini | PollingEntry **ppe, *pe; |
252 | d3b12f5d | Paolo Bonzini | pe = g_malloc0(sizeof(PollingEntry));
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253 | d3b12f5d | Paolo Bonzini | pe->func = func; |
254 | d3b12f5d | Paolo Bonzini | pe->opaque = opaque; |
255 | d3b12f5d | Paolo Bonzini | for(ppe = &first_polling_entry; *ppe != NULL; ppe = &(*ppe)->next); |
256 | d3b12f5d | Paolo Bonzini | *ppe = pe; |
257 | d3b12f5d | Paolo Bonzini | return 0; |
258 | d3b12f5d | Paolo Bonzini | } |
259 | d3b12f5d | Paolo Bonzini | |
260 | d3b12f5d | Paolo Bonzini | void qemu_del_polling_cb(PollingFunc *func, void *opaque) |
261 | d3b12f5d | Paolo Bonzini | { |
262 | d3b12f5d | Paolo Bonzini | PollingEntry **ppe, *pe; |
263 | d3b12f5d | Paolo Bonzini | for(ppe = &first_polling_entry; *ppe != NULL; ppe = &(*ppe)->next) { |
264 | d3b12f5d | Paolo Bonzini | pe = *ppe; |
265 | d3b12f5d | Paolo Bonzini | if (pe->func == func && pe->opaque == opaque) {
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266 | d3b12f5d | Paolo Bonzini | *ppe = pe->next; |
267 | d3b12f5d | Paolo Bonzini | g_free(pe); |
268 | d3b12f5d | Paolo Bonzini | break;
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269 | d3b12f5d | Paolo Bonzini | } |
270 | d3b12f5d | Paolo Bonzini | } |
271 | d3b12f5d | Paolo Bonzini | } |
272 | d3b12f5d | Paolo Bonzini | |
273 | d3b12f5d | Paolo Bonzini | /***********************************************************/
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274 | d3b12f5d | Paolo Bonzini | /* Wait objects support */
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275 | d3b12f5d | Paolo Bonzini | typedef struct WaitObjects { |
276 | d3b12f5d | Paolo Bonzini | int num;
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277 | 06ac7d49 | Paolo Bonzini | int revents[MAXIMUM_WAIT_OBJECTS + 1]; |
278 | d3b12f5d | Paolo Bonzini | HANDLE events[MAXIMUM_WAIT_OBJECTS + 1];
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279 | d3b12f5d | Paolo Bonzini | WaitObjectFunc *func[MAXIMUM_WAIT_OBJECTS + 1];
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280 | d3b12f5d | Paolo Bonzini | void *opaque[MAXIMUM_WAIT_OBJECTS + 1]; |
281 | d3b12f5d | Paolo Bonzini | } WaitObjects; |
282 | d3b12f5d | Paolo Bonzini | |
283 | d3b12f5d | Paolo Bonzini | static WaitObjects wait_objects = {0}; |
284 | d3b12f5d | Paolo Bonzini | |
285 | d3b12f5d | Paolo Bonzini | int qemu_add_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque) |
286 | d3b12f5d | Paolo Bonzini | { |
287 | d3b12f5d | Paolo Bonzini | WaitObjects *w = &wait_objects; |
288 | d3b12f5d | Paolo Bonzini | if (w->num >= MAXIMUM_WAIT_OBJECTS) {
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289 | d3b12f5d | Paolo Bonzini | return -1; |
290 | d3b12f5d | Paolo Bonzini | } |
291 | d3b12f5d | Paolo Bonzini | w->events[w->num] = handle; |
292 | d3b12f5d | Paolo Bonzini | w->func[w->num] = func; |
293 | d3b12f5d | Paolo Bonzini | w->opaque[w->num] = opaque; |
294 | 06ac7d49 | Paolo Bonzini | w->revents[w->num] = 0;
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295 | d3b12f5d | Paolo Bonzini | w->num++; |
296 | d3b12f5d | Paolo Bonzini | return 0; |
297 | d3b12f5d | Paolo Bonzini | } |
298 | d3b12f5d | Paolo Bonzini | |
299 | d3b12f5d | Paolo Bonzini | void qemu_del_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque) |
300 | d3b12f5d | Paolo Bonzini | { |
301 | d3b12f5d | Paolo Bonzini | int i, found;
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302 | d3b12f5d | Paolo Bonzini | WaitObjects *w = &wait_objects; |
303 | d3b12f5d | Paolo Bonzini | |
304 | d3b12f5d | Paolo Bonzini | found = 0;
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305 | d3b12f5d | Paolo Bonzini | for (i = 0; i < w->num; i++) { |
306 | d3b12f5d | Paolo Bonzini | if (w->events[i] == handle) {
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307 | d3b12f5d | Paolo Bonzini | found = 1;
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308 | d3b12f5d | Paolo Bonzini | } |
309 | d3b12f5d | Paolo Bonzini | if (found) {
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310 | d3b12f5d | Paolo Bonzini | w->events[i] = w->events[i + 1];
|
311 | d3b12f5d | Paolo Bonzini | w->func[i] = w->func[i + 1];
|
312 | d3b12f5d | Paolo Bonzini | w->opaque[i] = w->opaque[i + 1];
|
313 | 06ac7d49 | Paolo Bonzini | w->revents[i] = w->revents[i + 1];
|
314 | d3b12f5d | Paolo Bonzini | } |
315 | d3b12f5d | Paolo Bonzini | } |
316 | d3b12f5d | Paolo Bonzini | if (found) {
|
317 | d3b12f5d | Paolo Bonzini | w->num--; |
318 | d3b12f5d | Paolo Bonzini | } |
319 | d3b12f5d | Paolo Bonzini | } |
320 | d3b12f5d | Paolo Bonzini | |
321 | d3385eb4 | Paolo Bonzini | void qemu_fd_register(int fd) |
322 | d3385eb4 | Paolo Bonzini | { |
323 | 4c8d0d27 | Paolo Bonzini | WSAEventSelect(fd, event_notifier_get_handle(&qemu_aio_context->notifier), |
324 | 4c8d0d27 | Paolo Bonzini | FD_READ | FD_ACCEPT | FD_CLOSE | |
325 | d3385eb4 | Paolo Bonzini | FD_CONNECT | FD_WRITE | FD_OOB); |
326 | d3385eb4 | Paolo Bonzini | } |
327 | d3385eb4 | Paolo Bonzini | |
328 | cbff4b34 | Stefan Hajnoczi | static int pollfds_fill(GArray *pollfds, fd_set *rfds, fd_set *wfds, |
329 | cbff4b34 | Stefan Hajnoczi | fd_set *xfds) |
330 | cbff4b34 | Stefan Hajnoczi | { |
331 | cbff4b34 | Stefan Hajnoczi | int nfds = -1; |
332 | cbff4b34 | Stefan Hajnoczi | int i;
|
333 | cbff4b34 | Stefan Hajnoczi | |
334 | cbff4b34 | Stefan Hajnoczi | for (i = 0; i < pollfds->len; i++) { |
335 | cbff4b34 | Stefan Hajnoczi | GPollFD *pfd = &g_array_index(pollfds, GPollFD, i); |
336 | cbff4b34 | Stefan Hajnoczi | int fd = pfd->fd;
|
337 | cbff4b34 | Stefan Hajnoczi | int events = pfd->events;
|
338 | 8db165b3 | Stefan Hajnoczi | if (events & G_IO_IN) {
|
339 | cbff4b34 | Stefan Hajnoczi | FD_SET(fd, rfds); |
340 | cbff4b34 | Stefan Hajnoczi | nfds = MAX(nfds, fd); |
341 | cbff4b34 | Stefan Hajnoczi | } |
342 | 8db165b3 | Stefan Hajnoczi | if (events & G_IO_OUT) {
|
343 | cbff4b34 | Stefan Hajnoczi | FD_SET(fd, wfds); |
344 | cbff4b34 | Stefan Hajnoczi | nfds = MAX(nfds, fd); |
345 | cbff4b34 | Stefan Hajnoczi | } |
346 | cbff4b34 | Stefan Hajnoczi | if (events & G_IO_PRI) {
|
347 | cbff4b34 | Stefan Hajnoczi | FD_SET(fd, xfds); |
348 | cbff4b34 | Stefan Hajnoczi | nfds = MAX(nfds, fd); |
349 | cbff4b34 | Stefan Hajnoczi | } |
350 | cbff4b34 | Stefan Hajnoczi | } |
351 | cbff4b34 | Stefan Hajnoczi | return nfds;
|
352 | cbff4b34 | Stefan Hajnoczi | } |
353 | cbff4b34 | Stefan Hajnoczi | |
354 | cbff4b34 | Stefan Hajnoczi | static void pollfds_poll(GArray *pollfds, int nfds, fd_set *rfds, |
355 | cbff4b34 | Stefan Hajnoczi | fd_set *wfds, fd_set *xfds) |
356 | cbff4b34 | Stefan Hajnoczi | { |
357 | cbff4b34 | Stefan Hajnoczi | int i;
|
358 | cbff4b34 | Stefan Hajnoczi | |
359 | cbff4b34 | Stefan Hajnoczi | for (i = 0; i < pollfds->len; i++) { |
360 | cbff4b34 | Stefan Hajnoczi | GPollFD *pfd = &g_array_index(pollfds, GPollFD, i); |
361 | cbff4b34 | Stefan Hajnoczi | int fd = pfd->fd;
|
362 | cbff4b34 | Stefan Hajnoczi | int revents = 0; |
363 | cbff4b34 | Stefan Hajnoczi | |
364 | cbff4b34 | Stefan Hajnoczi | if (FD_ISSET(fd, rfds)) {
|
365 | 8db165b3 | Stefan Hajnoczi | revents |= G_IO_IN; |
366 | cbff4b34 | Stefan Hajnoczi | } |
367 | cbff4b34 | Stefan Hajnoczi | if (FD_ISSET(fd, wfds)) {
|
368 | 8db165b3 | Stefan Hajnoczi | revents |= G_IO_OUT; |
369 | cbff4b34 | Stefan Hajnoczi | } |
370 | cbff4b34 | Stefan Hajnoczi | if (FD_ISSET(fd, xfds)) {
|
371 | cbff4b34 | Stefan Hajnoczi | revents |= G_IO_PRI; |
372 | cbff4b34 | Stefan Hajnoczi | } |
373 | cbff4b34 | Stefan Hajnoczi | pfd->revents = revents & pfd->events; |
374 | cbff4b34 | Stefan Hajnoczi | } |
375 | cbff4b34 | Stefan Hajnoczi | } |
376 | cbff4b34 | Stefan Hajnoczi | |
377 | 7b595f35 | Alex Bligh | static int os_host_main_loop_wait(int64_t timeout) |
378 | d3b12f5d | Paolo Bonzini | { |
379 | ea26ce76 | Paolo Bonzini | GMainContext *context = g_main_context_default(); |
380 | 48ce11ff | Stefan Hajnoczi | GPollFD poll_fds[1024 * 2]; /* this is probably overkill */ |
381 | 134a03e0 | Stefan Hajnoczi | int select_ret = 0; |
382 | 48ce11ff | Stefan Hajnoczi | int g_poll_ret, ret, i, n_poll_fds;
|
383 | d3b12f5d | Paolo Bonzini | PollingEntry *pe; |
384 | d3385eb4 | Paolo Bonzini | WaitObjects *w = &wait_objects; |
385 | 42fe1c24 | Stefan Weil | gint poll_timeout; |
386 | 7b595f35 | Alex Bligh | int64_t poll_timeout_ns; |
387 | 15455536 | Paolo Bonzini | static struct timeval tv0; |
388 | 9cbaacf9 | Stefan Hajnoczi | fd_set rfds, wfds, xfds; |
389 | 9cbaacf9 | Stefan Hajnoczi | int nfds;
|
390 | d3b12f5d | Paolo Bonzini | |
391 | d3b12f5d | Paolo Bonzini | /* XXX: need to suppress polling by better using win32 events */
|
392 | d3b12f5d | Paolo Bonzini | ret = 0;
|
393 | d3b12f5d | Paolo Bonzini | for (pe = first_polling_entry; pe != NULL; pe = pe->next) { |
394 | d3b12f5d | Paolo Bonzini | ret |= pe->func(pe->opaque); |
395 | d3b12f5d | Paolo Bonzini | } |
396 | d3385eb4 | Paolo Bonzini | if (ret != 0) { |
397 | d3385eb4 | Paolo Bonzini | return ret;
|
398 | d3385eb4 | Paolo Bonzini | } |
399 | d3b12f5d | Paolo Bonzini | |
400 | 3cb8c205 | Stefan Hajnoczi | FD_ZERO(&rfds); |
401 | 3cb8c205 | Stefan Hajnoczi | FD_ZERO(&wfds); |
402 | 3cb8c205 | Stefan Hajnoczi | FD_ZERO(&xfds); |
403 | 3cb8c205 | Stefan Hajnoczi | nfds = pollfds_fill(gpollfds, &rfds, &wfds, &xfds); |
404 | 3cb8c205 | Stefan Hajnoczi | if (nfds >= 0) { |
405 | 3cb8c205 | Stefan Hajnoczi | select_ret = select(nfds + 1, &rfds, &wfds, &xfds, &tv0);
|
406 | 3cb8c205 | Stefan Hajnoczi | if (select_ret != 0) { |
407 | 3cb8c205 | Stefan Hajnoczi | timeout = 0;
|
408 | 3cb8c205 | Stefan Hajnoczi | } |
409 | 3cb8c205 | Stefan Hajnoczi | if (select_ret > 0) { |
410 | 3cb8c205 | Stefan Hajnoczi | pollfds_poll(gpollfds, nfds, &rfds, &wfds, &xfds); |
411 | 3cb8c205 | Stefan Hajnoczi | } |
412 | 3cb8c205 | Stefan Hajnoczi | } |
413 | 3cb8c205 | Stefan Hajnoczi | |
414 | ea26ce76 | Paolo Bonzini | g_main_context_prepare(context, &max_priority); |
415 | 42fe1c24 | Stefan Weil | n_poll_fds = g_main_context_query(context, max_priority, &poll_timeout, |
416 | ea26ce76 | Paolo Bonzini | poll_fds, ARRAY_SIZE(poll_fds)); |
417 | ea26ce76 | Paolo Bonzini | g_assert(n_poll_fds <= ARRAY_SIZE(poll_fds)); |
418 | ea26ce76 | Paolo Bonzini | |
419 | 06ac7d49 | Paolo Bonzini | for (i = 0; i < w->num; i++) { |
420 | 58b9630d | Stefan Weil | poll_fds[n_poll_fds + i].fd = (DWORD_PTR)w->events[i]; |
421 | ea26ce76 | Paolo Bonzini | poll_fds[n_poll_fds + i].events = G_IO_IN; |
422 | 06ac7d49 | Paolo Bonzini | } |
423 | 06ac7d49 | Paolo Bonzini | |
424 | 7b595f35 | Alex Bligh | if (poll_timeout < 0) { |
425 | 7b595f35 | Alex Bligh | poll_timeout_ns = -1;
|
426 | 7b595f35 | Alex Bligh | } else {
|
427 | 7b595f35 | Alex Bligh | poll_timeout_ns = (int64_t)poll_timeout * (int64_t)SCALE_MS; |
428 | 3239ad04 | Stefan Weil | } |
429 | 3239ad04 | Stefan Weil | |
430 | 7b595f35 | Alex Bligh | poll_timeout_ns = qemu_soonest_timeout(poll_timeout_ns, timeout); |
431 | 7b595f35 | Alex Bligh | |
432 | d3385eb4 | Paolo Bonzini | qemu_mutex_unlock_iothread(); |
433 | 7b595f35 | Alex Bligh | g_poll_ret = qemu_poll_ns(poll_fds, n_poll_fds + w->num, poll_timeout_ns); |
434 | 7b595f35 | Alex Bligh | |
435 | d3385eb4 | Paolo Bonzini | qemu_mutex_lock_iothread(); |
436 | 5e3bc735 | Fabien Chouteau | if (g_poll_ret > 0) { |
437 | 06ac7d49 | Paolo Bonzini | for (i = 0; i < w->num; i++) { |
438 | ea26ce76 | Paolo Bonzini | w->revents[i] = poll_fds[n_poll_fds + i].revents; |
439 | d3385eb4 | Paolo Bonzini | } |
440 | 06ac7d49 | Paolo Bonzini | for (i = 0; i < w->num; i++) { |
441 | 06ac7d49 | Paolo Bonzini | if (w->revents[i] && w->func[i]) {
|
442 | 06ac7d49 | Paolo Bonzini | w->func[i](w->opaque[i]); |
443 | d3b12f5d | Paolo Bonzini | } |
444 | d3b12f5d | Paolo Bonzini | } |
445 | d3b12f5d | Paolo Bonzini | } |
446 | d3b12f5d | Paolo Bonzini | |
447 | ea26ce76 | Paolo Bonzini | if (g_main_context_check(context, max_priority, poll_fds, n_poll_fds)) {
|
448 | ea26ce76 | Paolo Bonzini | g_main_context_dispatch(context); |
449 | ea26ce76 | Paolo Bonzini | } |
450 | ea26ce76 | Paolo Bonzini | |
451 | 5e3bc735 | Fabien Chouteau | return select_ret || g_poll_ret;
|
452 | d3b12f5d | Paolo Bonzini | } |
453 | d3b12f5d | Paolo Bonzini | #endif
|
454 | d3b12f5d | Paolo Bonzini | |
455 | d3b12f5d | Paolo Bonzini | int main_loop_wait(int nonblocking) |
456 | d3b12f5d | Paolo Bonzini | { |
457 | 7c7db755 | Stefano Stabellini | int ret;
|
458 | 7c7db755 | Stefano Stabellini | uint32_t timeout = UINT32_MAX; |
459 | 7b595f35 | Alex Bligh | int64_t timeout_ns; |
460 | d3b12f5d | Paolo Bonzini | |
461 | d3b12f5d | Paolo Bonzini | if (nonblocking) {
|
462 | d3b12f5d | Paolo Bonzini | timeout = 0;
|
463 | d3b12f5d | Paolo Bonzini | } |
464 | d3b12f5d | Paolo Bonzini | |
465 | d3b12f5d | Paolo Bonzini | /* poll any events */
|
466 | cbff4b34 | Stefan Hajnoczi | g_array_set_size(gpollfds, 0); /* reset for new iteration */ |
467 | d3b12f5d | Paolo Bonzini | /* XXX: separate device handlers from system ones */
|
468 | d3b12f5d | Paolo Bonzini | #ifdef CONFIG_SLIRP
|
469 | a42e9c41 | Liu Ping Fan | slirp_pollfds_fill(gpollfds, &timeout); |
470 | d3b12f5d | Paolo Bonzini | #endif
|
471 | a3e4b4a8 | Stefan Hajnoczi | qemu_iohandler_fill(gpollfds); |
472 | 7b595f35 | Alex Bligh | |
473 | 7b595f35 | Alex Bligh | if (timeout == UINT32_MAX) {
|
474 | 7b595f35 | Alex Bligh | timeout_ns = -1;
|
475 | 7b595f35 | Alex Bligh | } else {
|
476 | 7b595f35 | Alex Bligh | timeout_ns = (uint64_t)timeout * (int64_t)(SCALE_MS); |
477 | 7b595f35 | Alex Bligh | } |
478 | 7b595f35 | Alex Bligh | |
479 | 7b595f35 | Alex Bligh | timeout_ns = qemu_soonest_timeout(timeout_ns, |
480 | 7b595f35 | Alex Bligh | timerlistgroup_deadline_ns( |
481 | 7b595f35 | Alex Bligh | &main_loop_tlg)); |
482 | 7b595f35 | Alex Bligh | |
483 | 7b595f35 | Alex Bligh | ret = os_host_main_loop_wait(timeout_ns); |
484 | a3e4b4a8 | Stefan Hajnoczi | qemu_iohandler_poll(gpollfds, ret); |
485 | d3b12f5d | Paolo Bonzini | #ifdef CONFIG_SLIRP
|
486 | 8917c3bd | Stefan Hajnoczi | slirp_pollfds_poll(gpollfds, (ret < 0));
|
487 | d3b12f5d | Paolo Bonzini | #endif
|
488 | d3b12f5d | Paolo Bonzini | |
489 | 40daca54 | Alex Bligh | qemu_clock_run_all_timers(); |
490 | d3b12f5d | Paolo Bonzini | |
491 | d3b12f5d | Paolo Bonzini | return ret;
|
492 | d3b12f5d | Paolo Bonzini | } |
493 | f627aab1 | Paolo Bonzini | |
494 | f627aab1 | Paolo Bonzini | /* Functions to operate on the main QEMU AioContext. */
|
495 | f627aab1 | Paolo Bonzini | |
496 | f627aab1 | Paolo Bonzini | QEMUBH *qemu_bh_new(QEMUBHFunc *cb, void *opaque)
|
497 | f627aab1 | Paolo Bonzini | { |
498 | f627aab1 | Paolo Bonzini | return aio_bh_new(qemu_aio_context, cb, opaque);
|
499 | f627aab1 | Paolo Bonzini | } |
500 | f627aab1 | Paolo Bonzini | |
501 | a915f4bc | Paolo Bonzini | bool qemu_aio_wait(void) |
502 | a915f4bc | Paolo Bonzini | { |
503 | 7c0628b2 | Paolo Bonzini | return aio_poll(qemu_aio_context, true); |
504 | a915f4bc | Paolo Bonzini | } |
505 | a915f4bc | Paolo Bonzini | |
506 | f42b2207 | Paolo Bonzini | #ifdef CONFIG_POSIX
|
507 | a915f4bc | Paolo Bonzini | void qemu_aio_set_fd_handler(int fd, |
508 | a915f4bc | Paolo Bonzini | IOHandler *io_read, |
509 | a915f4bc | Paolo Bonzini | IOHandler *io_write, |
510 | a915f4bc | Paolo Bonzini | void *opaque)
|
511 | a915f4bc | Paolo Bonzini | { |
512 | f2e5dca4 | Stefan Hajnoczi | aio_set_fd_handler(qemu_aio_context, fd, io_read, io_write, opaque); |
513 | a915f4bc | Paolo Bonzini | } |
514 | 82cbbdc6 | Paolo Bonzini | #endif
|
515 | a915f4bc | Paolo Bonzini | |
516 | a915f4bc | Paolo Bonzini | void qemu_aio_set_event_notifier(EventNotifier *notifier,
|
517 | f2e5dca4 | Stefan Hajnoczi | EventNotifierHandler *io_read) |
518 | a915f4bc | Paolo Bonzini | { |
519 | f2e5dca4 | Stefan Hajnoczi | aio_set_event_notifier(qemu_aio_context, notifier, io_read); |
520 | a915f4bc | Paolo Bonzini | } |