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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 | 0ec024f6 | Stefan Weil | #include "slirp/slirp.h" |
28 | 1de7afc9 | Paolo Bonzini | #include "qemu/main-loop.h" |
29 | 737e150e | Paolo Bonzini | #include "block/aio.h" |
30 | d3b12f5d | Paolo Bonzini | |
31 | d3b12f5d | Paolo Bonzini | #ifndef _WIN32
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32 | d3b12f5d | Paolo Bonzini | |
33 | 1de7afc9 | Paolo Bonzini | #include "qemu/compatfd.h" |
34 | 0ec024f6 | Stefan Weil | |
35 | d3b12f5d | Paolo Bonzini | /* If we have signalfd, we mask out the signals we want to handle and then
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36 | d3b12f5d | Paolo Bonzini | * use signalfd to listen for them. We rely on whatever the current signal
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37 | d3b12f5d | Paolo Bonzini | * handler is to dispatch the signals when we receive them.
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38 | d3b12f5d | Paolo Bonzini | */
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39 | d3b12f5d | Paolo Bonzini | static void sigfd_handler(void *opaque) |
40 | d3b12f5d | Paolo Bonzini | { |
41 | d3b12f5d | Paolo Bonzini | int fd = (intptr_t)opaque;
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42 | d3b12f5d | Paolo Bonzini | struct qemu_signalfd_siginfo info;
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43 | d3b12f5d | Paolo Bonzini | struct sigaction action;
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44 | d3b12f5d | Paolo Bonzini | ssize_t len; |
45 | d3b12f5d | Paolo Bonzini | |
46 | d3b12f5d | Paolo Bonzini | while (1) { |
47 | d3b12f5d | Paolo Bonzini | do {
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48 | d3b12f5d | Paolo Bonzini | len = read(fd, &info, sizeof(info));
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49 | d3b12f5d | Paolo Bonzini | } while (len == -1 && errno == EINTR); |
50 | d3b12f5d | Paolo Bonzini | |
51 | d3b12f5d | Paolo Bonzini | if (len == -1 && errno == EAGAIN) { |
52 | d3b12f5d | Paolo Bonzini | break;
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53 | d3b12f5d | Paolo Bonzini | } |
54 | d3b12f5d | Paolo Bonzini | |
55 | d3b12f5d | Paolo Bonzini | if (len != sizeof(info)) { |
56 | d3b12f5d | Paolo Bonzini | printf("read from sigfd returned %zd: %m\n", len);
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57 | d3b12f5d | Paolo Bonzini | return;
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58 | d3b12f5d | Paolo Bonzini | } |
59 | d3b12f5d | Paolo Bonzini | |
60 | d3b12f5d | Paolo Bonzini | sigaction(info.ssi_signo, NULL, &action);
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61 | d3b12f5d | Paolo Bonzini | if ((action.sa_flags & SA_SIGINFO) && action.sa_sigaction) {
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62 | d3b12f5d | Paolo Bonzini | action.sa_sigaction(info.ssi_signo, |
63 | d3b12f5d | Paolo Bonzini | (siginfo_t *)&info, NULL);
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64 | d3b12f5d | Paolo Bonzini | } else if (action.sa_handler) { |
65 | d3b12f5d | Paolo Bonzini | action.sa_handler(info.ssi_signo); |
66 | d3b12f5d | Paolo Bonzini | } |
67 | d3b12f5d | Paolo Bonzini | } |
68 | d3b12f5d | Paolo Bonzini | } |
69 | d3b12f5d | Paolo Bonzini | |
70 | d3b12f5d | Paolo Bonzini | static int qemu_signal_init(void) |
71 | d3b12f5d | Paolo Bonzini | { |
72 | d3b12f5d | Paolo Bonzini | int sigfd;
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73 | d3b12f5d | Paolo Bonzini | sigset_t set; |
74 | d3b12f5d | Paolo Bonzini | |
75 | d3b12f5d | Paolo Bonzini | /*
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76 | d3b12f5d | Paolo Bonzini | * SIG_IPI must be blocked in the main thread and must not be caught
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77 | d3b12f5d | Paolo Bonzini | * by sigwait() in the signal thread. Otherwise, the cpu thread will
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78 | d3b12f5d | Paolo Bonzini | * not catch it reliably.
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79 | d3b12f5d | Paolo Bonzini | */
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80 | d3b12f5d | Paolo Bonzini | sigemptyset(&set); |
81 | d3b12f5d | Paolo Bonzini | sigaddset(&set, SIG_IPI); |
82 | d3b12f5d | Paolo Bonzini | sigaddset(&set, SIGIO); |
83 | d3b12f5d | Paolo Bonzini | sigaddset(&set, SIGALRM); |
84 | d3b12f5d | Paolo Bonzini | sigaddset(&set, SIGBUS); |
85 | d3b12f5d | Paolo Bonzini | pthread_sigmask(SIG_BLOCK, &set, NULL);
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86 | d3b12f5d | Paolo Bonzini | |
87 | 4aa7534d | Lai Jiangshan | sigdelset(&set, SIG_IPI); |
88 | d3b12f5d | Paolo Bonzini | sigfd = qemu_signalfd(&set); |
89 | d3b12f5d | Paolo Bonzini | if (sigfd == -1) { |
90 | d3b12f5d | Paolo Bonzini | fprintf(stderr, "failed to create signalfd\n");
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91 | d3b12f5d | Paolo Bonzini | return -errno;
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92 | d3b12f5d | Paolo Bonzini | } |
93 | d3b12f5d | Paolo Bonzini | |
94 | d3b12f5d | Paolo Bonzini | fcntl_setfl(sigfd, O_NONBLOCK); |
95 | d3b12f5d | Paolo Bonzini | |
96 | d3b12f5d | Paolo Bonzini | qemu_set_fd_handler2(sigfd, NULL, sigfd_handler, NULL, |
97 | d3b12f5d | Paolo Bonzini | (void *)(intptr_t)sigfd);
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98 | d3b12f5d | Paolo Bonzini | |
99 | d3b12f5d | Paolo Bonzini | return 0; |
100 | d3b12f5d | Paolo Bonzini | } |
101 | d3b12f5d | Paolo Bonzini | |
102 | d3b12f5d | Paolo Bonzini | #else /* _WIN32 */ |
103 | d3b12f5d | Paolo Bonzini | |
104 | 4c8d0d27 | Paolo Bonzini | static int qemu_signal_init(void) |
105 | d3b12f5d | Paolo Bonzini | { |
106 | d3b12f5d | Paolo Bonzini | return 0; |
107 | d3b12f5d | Paolo Bonzini | } |
108 | 4c8d0d27 | Paolo Bonzini | #endif
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109 | 4c8d0d27 | Paolo Bonzini | |
110 | 4c8d0d27 | Paolo Bonzini | static AioContext *qemu_aio_context;
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111 | d3b12f5d | Paolo Bonzini | |
112 | d3b12f5d | Paolo Bonzini | void qemu_notify_event(void) |
113 | d3b12f5d | Paolo Bonzini | { |
114 | 4c8d0d27 | Paolo Bonzini | if (!qemu_aio_context) {
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115 | ee77dfb2 | Michael Roth | return;
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116 | ee77dfb2 | Michael Roth | } |
117 | 4c8d0d27 | Paolo Bonzini | aio_notify(qemu_aio_context); |
118 | d3b12f5d | Paolo Bonzini | } |
119 | d3b12f5d | Paolo Bonzini | |
120 | cbff4b34 | Stefan Hajnoczi | static GArray *gpollfds;
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121 | cbff4b34 | Stefan Hajnoczi | |
122 | 172061a0 | Paolo Bonzini | int qemu_init_main_loop(void) |
123 | d3b12f5d | Paolo Bonzini | { |
124 | d3b12f5d | Paolo Bonzini | int ret;
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125 | 82cbbdc6 | Paolo Bonzini | GSource *src; |
126 | d3b12f5d | Paolo Bonzini | |
127 | 172061a0 | Paolo Bonzini | init_clocks(); |
128 | f9ab4654 | Paolo Bonzini | if (init_timer_alarm() < 0) { |
129 | f9ab4654 | Paolo Bonzini | fprintf(stderr, "could not initialize alarm timer\n");
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130 | f9ab4654 | Paolo Bonzini | exit(1);
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131 | f9ab4654 | Paolo Bonzini | } |
132 | 172061a0 | Paolo Bonzini | |
133 | d3b12f5d | Paolo Bonzini | ret = qemu_signal_init(); |
134 | d3b12f5d | Paolo Bonzini | if (ret) {
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135 | d3b12f5d | Paolo Bonzini | return ret;
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136 | d3b12f5d | Paolo Bonzini | } |
137 | d3b12f5d | Paolo Bonzini | |
138 | cbff4b34 | Stefan Hajnoczi | gpollfds = g_array_new(FALSE, FALSE, sizeof(GPollFD));
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139 | f627aab1 | Paolo Bonzini | qemu_aio_context = aio_context_new(); |
140 | 82cbbdc6 | Paolo Bonzini | src = aio_get_g_source(qemu_aio_context); |
141 | 82cbbdc6 | Paolo Bonzini | g_source_attach(src, NULL);
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142 | 82cbbdc6 | Paolo Bonzini | g_source_unref(src); |
143 | d3b12f5d | Paolo Bonzini | return 0; |
144 | d3b12f5d | Paolo Bonzini | } |
145 | d3b12f5d | Paolo Bonzini | |
146 | 15455536 | Paolo Bonzini | static fd_set rfds, wfds, xfds;
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147 | 15455536 | Paolo Bonzini | static int nfds; |
148 | d3b12f5d | Paolo Bonzini | static int max_priority; |
149 | d3b12f5d | Paolo Bonzini | |
150 | cbff4b34 | Stefan Hajnoczi | /* Load rfds/wfds/xfds into gpollfds. Will be removed a few commits later. */
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151 | cbff4b34 | Stefan Hajnoczi | static void gpollfds_from_select(void) |
152 | cbff4b34 | Stefan Hajnoczi | { |
153 | cbff4b34 | Stefan Hajnoczi | int fd;
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154 | cbff4b34 | Stefan Hajnoczi | for (fd = 0; fd <= nfds; fd++) { |
155 | cbff4b34 | Stefan Hajnoczi | int events = 0; |
156 | cbff4b34 | Stefan Hajnoczi | if (FD_ISSET(fd, &rfds)) {
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157 | cbff4b34 | Stefan Hajnoczi | events |= G_IO_IN | G_IO_HUP | G_IO_ERR; |
158 | cbff4b34 | Stefan Hajnoczi | } |
159 | cbff4b34 | Stefan Hajnoczi | if (FD_ISSET(fd, &wfds)) {
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160 | cbff4b34 | Stefan Hajnoczi | events |= G_IO_OUT | G_IO_ERR; |
161 | cbff4b34 | Stefan Hajnoczi | } |
162 | cbff4b34 | Stefan Hajnoczi | if (FD_ISSET(fd, &xfds)) {
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163 | cbff4b34 | Stefan Hajnoczi | events |= G_IO_PRI; |
164 | cbff4b34 | Stefan Hajnoczi | } |
165 | cbff4b34 | Stefan Hajnoczi | if (events) {
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166 | cbff4b34 | Stefan Hajnoczi | GPollFD pfd = { |
167 | cbff4b34 | Stefan Hajnoczi | .fd = fd, |
168 | cbff4b34 | Stefan Hajnoczi | .events = events, |
169 | cbff4b34 | Stefan Hajnoczi | }; |
170 | cbff4b34 | Stefan Hajnoczi | g_array_append_val(gpollfds, pfd); |
171 | cbff4b34 | Stefan Hajnoczi | } |
172 | cbff4b34 | Stefan Hajnoczi | } |
173 | cbff4b34 | Stefan Hajnoczi | } |
174 | cbff4b34 | Stefan Hajnoczi | |
175 | cbff4b34 | Stefan Hajnoczi | /* Store gpollfds revents into rfds/wfds/xfds. Will be removed a few commits
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176 | cbff4b34 | Stefan Hajnoczi | * later.
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177 | cbff4b34 | Stefan Hajnoczi | */
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178 | cbff4b34 | Stefan Hajnoczi | static void gpollfds_to_select(int ret) |
179 | cbff4b34 | Stefan Hajnoczi | { |
180 | cbff4b34 | Stefan Hajnoczi | int i;
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181 | cbff4b34 | Stefan Hajnoczi | |
182 | cbff4b34 | Stefan Hajnoczi | FD_ZERO(&rfds); |
183 | cbff4b34 | Stefan Hajnoczi | FD_ZERO(&wfds); |
184 | cbff4b34 | Stefan Hajnoczi | FD_ZERO(&xfds); |
185 | cbff4b34 | Stefan Hajnoczi | |
186 | cbff4b34 | Stefan Hajnoczi | if (ret <= 0) { |
187 | cbff4b34 | Stefan Hajnoczi | return;
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188 | cbff4b34 | Stefan Hajnoczi | } |
189 | cbff4b34 | Stefan Hajnoczi | |
190 | cbff4b34 | Stefan Hajnoczi | for (i = 0; i < gpollfds->len; i++) { |
191 | cbff4b34 | Stefan Hajnoczi | int fd = g_array_index(gpollfds, GPollFD, i).fd;
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192 | cbff4b34 | Stefan Hajnoczi | int revents = g_array_index(gpollfds, GPollFD, i).revents;
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193 | cbff4b34 | Stefan Hajnoczi | |
194 | cbff4b34 | Stefan Hajnoczi | if (revents & (G_IO_IN | G_IO_HUP | G_IO_ERR)) {
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195 | cbff4b34 | Stefan Hajnoczi | FD_SET(fd, &rfds); |
196 | cbff4b34 | Stefan Hajnoczi | } |
197 | cbff4b34 | Stefan Hajnoczi | if (revents & (G_IO_OUT | G_IO_ERR)) {
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198 | cbff4b34 | Stefan Hajnoczi | FD_SET(fd, &wfds); |
199 | cbff4b34 | Stefan Hajnoczi | } |
200 | cbff4b34 | Stefan Hajnoczi | if (revents & G_IO_PRI) {
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201 | cbff4b34 | Stefan Hajnoczi | FD_SET(fd, &xfds); |
202 | cbff4b34 | Stefan Hajnoczi | } |
203 | cbff4b34 | Stefan Hajnoczi | } |
204 | cbff4b34 | Stefan Hajnoczi | } |
205 | cbff4b34 | Stefan Hajnoczi | |
206 | ea26ce76 | Paolo Bonzini | #ifndef _WIN32
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207 | 48ce11ff | Stefan Hajnoczi | static int glib_pollfds_idx; |
208 | 48ce11ff | Stefan Hajnoczi | static int glib_n_poll_fds; |
209 | 48ce11ff | Stefan Hajnoczi | |
210 | 48ce11ff | Stefan Hajnoczi | static void glib_pollfds_fill(uint32_t *cur_timeout) |
211 | d3b12f5d | Paolo Bonzini | { |
212 | d3b12f5d | Paolo Bonzini | GMainContext *context = g_main_context_default(); |
213 | 4dae83ae | Paolo Bonzini | int timeout = 0; |
214 | 48ce11ff | Stefan Hajnoczi | int n;
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215 | d3b12f5d | Paolo Bonzini | |
216 | d3b12f5d | Paolo Bonzini | g_main_context_prepare(context, &max_priority); |
217 | d3b12f5d | Paolo Bonzini | |
218 | 48ce11ff | Stefan Hajnoczi | glib_pollfds_idx = gpollfds->len; |
219 | 48ce11ff | Stefan Hajnoczi | n = glib_n_poll_fds; |
220 | 48ce11ff | Stefan Hajnoczi | do {
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221 | 48ce11ff | Stefan Hajnoczi | GPollFD *pfds; |
222 | 48ce11ff | Stefan Hajnoczi | glib_n_poll_fds = n; |
223 | 48ce11ff | Stefan Hajnoczi | g_array_set_size(gpollfds, glib_pollfds_idx + glib_n_poll_fds); |
224 | 48ce11ff | Stefan Hajnoczi | pfds = &g_array_index(gpollfds, GPollFD, glib_pollfds_idx); |
225 | 48ce11ff | Stefan Hajnoczi | n = g_main_context_query(context, max_priority, &timeout, pfds, |
226 | 48ce11ff | Stefan Hajnoczi | glib_n_poll_fds); |
227 | 48ce11ff | Stefan Hajnoczi | } while (n != glib_n_poll_fds);
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228 | d3b12f5d | Paolo Bonzini | |
229 | 4dae83ae | Paolo Bonzini | if (timeout >= 0 && timeout < *cur_timeout) { |
230 | 4dae83ae | Paolo Bonzini | *cur_timeout = timeout; |
231 | d3b12f5d | Paolo Bonzini | } |
232 | d3b12f5d | Paolo Bonzini | } |
233 | d3b12f5d | Paolo Bonzini | |
234 | 48ce11ff | Stefan Hajnoczi | static void glib_pollfds_poll(void) |
235 | d3b12f5d | Paolo Bonzini | { |
236 | d3b12f5d | Paolo Bonzini | GMainContext *context = g_main_context_default(); |
237 | 48ce11ff | Stefan Hajnoczi | GPollFD *pfds = &g_array_index(gpollfds, GPollFD, glib_pollfds_idx); |
238 | d3b12f5d | Paolo Bonzini | |
239 | 48ce11ff | Stefan Hajnoczi | if (g_main_context_check(context, max_priority, pfds, glib_n_poll_fds)) {
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240 | d3b12f5d | Paolo Bonzini | g_main_context_dispatch(context); |
241 | d3b12f5d | Paolo Bonzini | } |
242 | d3b12f5d | Paolo Bonzini | } |
243 | d3b12f5d | Paolo Bonzini | |
244 | 7c7db755 | Stefano Stabellini | static int os_host_main_loop_wait(uint32_t timeout) |
245 | 15455536 | Paolo Bonzini | { |
246 | 15455536 | Paolo Bonzini | int ret;
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247 | 15455536 | Paolo Bonzini | |
248 | 48ce11ff | Stefan Hajnoczi | glib_pollfds_fill(&timeout); |
249 | 15455536 | Paolo Bonzini | |
250 | 15455536 | Paolo Bonzini | if (timeout > 0) { |
251 | 15455536 | Paolo Bonzini | qemu_mutex_unlock_iothread(); |
252 | 15455536 | Paolo Bonzini | } |
253 | 15455536 | Paolo Bonzini | |
254 | cbff4b34 | Stefan Hajnoczi | /* We'll eventually drop fd_set completely. But for now we still have
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255 | cbff4b34 | Stefan Hajnoczi | * *_fill() and *_poll() functions that use rfds/wfds/xfds.
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256 | cbff4b34 | Stefan Hajnoczi | */
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257 | cbff4b34 | Stefan Hajnoczi | gpollfds_from_select(); |
258 | cbff4b34 | Stefan Hajnoczi | |
259 | cbff4b34 | Stefan Hajnoczi | ret = g_poll((GPollFD *)gpollfds->data, gpollfds->len, timeout); |
260 | cbff4b34 | Stefan Hajnoczi | |
261 | cbff4b34 | Stefan Hajnoczi | gpollfds_to_select(ret); |
262 | 15455536 | Paolo Bonzini | |
263 | 15455536 | Paolo Bonzini | if (timeout > 0) { |
264 | 15455536 | Paolo Bonzini | qemu_mutex_lock_iothread(); |
265 | 15455536 | Paolo Bonzini | } |
266 | 15455536 | Paolo Bonzini | |
267 | 48ce11ff | Stefan Hajnoczi | glib_pollfds_poll(); |
268 | 15455536 | Paolo Bonzini | return ret;
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269 | 15455536 | Paolo Bonzini | } |
270 | 15455536 | Paolo Bonzini | #else
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271 | d3b12f5d | Paolo Bonzini | /***********************************************************/
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272 | d3b12f5d | Paolo Bonzini | /* Polling handling */
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273 | d3b12f5d | Paolo Bonzini | |
274 | d3b12f5d | Paolo Bonzini | typedef struct PollingEntry { |
275 | d3b12f5d | Paolo Bonzini | PollingFunc *func; |
276 | d3b12f5d | Paolo Bonzini | void *opaque;
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277 | d3b12f5d | Paolo Bonzini | struct PollingEntry *next;
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278 | d3b12f5d | Paolo Bonzini | } PollingEntry; |
279 | d3b12f5d | Paolo Bonzini | |
280 | d3b12f5d | Paolo Bonzini | static PollingEntry *first_polling_entry;
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281 | d3b12f5d | Paolo Bonzini | |
282 | d3b12f5d | Paolo Bonzini | int qemu_add_polling_cb(PollingFunc *func, void *opaque) |
283 | d3b12f5d | Paolo Bonzini | { |
284 | d3b12f5d | Paolo Bonzini | PollingEntry **ppe, *pe; |
285 | d3b12f5d | Paolo Bonzini | pe = g_malloc0(sizeof(PollingEntry));
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286 | d3b12f5d | Paolo Bonzini | pe->func = func; |
287 | d3b12f5d | Paolo Bonzini | pe->opaque = opaque; |
288 | d3b12f5d | Paolo Bonzini | for(ppe = &first_polling_entry; *ppe != NULL; ppe = &(*ppe)->next); |
289 | d3b12f5d | Paolo Bonzini | *ppe = pe; |
290 | d3b12f5d | Paolo Bonzini | return 0; |
291 | d3b12f5d | Paolo Bonzini | } |
292 | d3b12f5d | Paolo Bonzini | |
293 | d3b12f5d | Paolo Bonzini | void qemu_del_polling_cb(PollingFunc *func, void *opaque) |
294 | d3b12f5d | Paolo Bonzini | { |
295 | d3b12f5d | Paolo Bonzini | PollingEntry **ppe, *pe; |
296 | d3b12f5d | Paolo Bonzini | for(ppe = &first_polling_entry; *ppe != NULL; ppe = &(*ppe)->next) { |
297 | d3b12f5d | Paolo Bonzini | pe = *ppe; |
298 | d3b12f5d | Paolo Bonzini | if (pe->func == func && pe->opaque == opaque) {
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299 | d3b12f5d | Paolo Bonzini | *ppe = pe->next; |
300 | d3b12f5d | Paolo Bonzini | g_free(pe); |
301 | d3b12f5d | Paolo Bonzini | break;
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302 | d3b12f5d | Paolo Bonzini | } |
303 | d3b12f5d | Paolo Bonzini | } |
304 | d3b12f5d | Paolo Bonzini | } |
305 | d3b12f5d | Paolo Bonzini | |
306 | d3b12f5d | Paolo Bonzini | /***********************************************************/
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307 | d3b12f5d | Paolo Bonzini | /* Wait objects support */
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308 | d3b12f5d | Paolo Bonzini | typedef struct WaitObjects { |
309 | d3b12f5d | Paolo Bonzini | int num;
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310 | 06ac7d49 | Paolo Bonzini | int revents[MAXIMUM_WAIT_OBJECTS + 1]; |
311 | d3b12f5d | Paolo Bonzini | HANDLE events[MAXIMUM_WAIT_OBJECTS + 1];
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312 | d3b12f5d | Paolo Bonzini | WaitObjectFunc *func[MAXIMUM_WAIT_OBJECTS + 1];
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313 | d3b12f5d | Paolo Bonzini | void *opaque[MAXIMUM_WAIT_OBJECTS + 1]; |
314 | d3b12f5d | Paolo Bonzini | } WaitObjects; |
315 | d3b12f5d | Paolo Bonzini | |
316 | d3b12f5d | Paolo Bonzini | static WaitObjects wait_objects = {0}; |
317 | d3b12f5d | Paolo Bonzini | |
318 | d3b12f5d | Paolo Bonzini | int qemu_add_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque) |
319 | d3b12f5d | Paolo Bonzini | { |
320 | d3b12f5d | Paolo Bonzini | WaitObjects *w = &wait_objects; |
321 | d3b12f5d | Paolo Bonzini | if (w->num >= MAXIMUM_WAIT_OBJECTS) {
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322 | d3b12f5d | Paolo Bonzini | return -1; |
323 | d3b12f5d | Paolo Bonzini | } |
324 | d3b12f5d | Paolo Bonzini | w->events[w->num] = handle; |
325 | d3b12f5d | Paolo Bonzini | w->func[w->num] = func; |
326 | d3b12f5d | Paolo Bonzini | w->opaque[w->num] = opaque; |
327 | 06ac7d49 | Paolo Bonzini | w->revents[w->num] = 0;
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328 | d3b12f5d | Paolo Bonzini | w->num++; |
329 | d3b12f5d | Paolo Bonzini | return 0; |
330 | d3b12f5d | Paolo Bonzini | } |
331 | d3b12f5d | Paolo Bonzini | |
332 | d3b12f5d | Paolo Bonzini | void qemu_del_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque) |
333 | d3b12f5d | Paolo Bonzini | { |
334 | d3b12f5d | Paolo Bonzini | int i, found;
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335 | d3b12f5d | Paolo Bonzini | WaitObjects *w = &wait_objects; |
336 | d3b12f5d | Paolo Bonzini | |
337 | d3b12f5d | Paolo Bonzini | found = 0;
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338 | d3b12f5d | Paolo Bonzini | for (i = 0; i < w->num; i++) { |
339 | d3b12f5d | Paolo Bonzini | if (w->events[i] == handle) {
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340 | d3b12f5d | Paolo Bonzini | found = 1;
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341 | d3b12f5d | Paolo Bonzini | } |
342 | d3b12f5d | Paolo Bonzini | if (found) {
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343 | d3b12f5d | Paolo Bonzini | w->events[i] = w->events[i + 1];
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344 | d3b12f5d | Paolo Bonzini | w->func[i] = w->func[i + 1];
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345 | d3b12f5d | Paolo Bonzini | w->opaque[i] = w->opaque[i + 1];
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346 | 06ac7d49 | Paolo Bonzini | w->revents[i] = w->revents[i + 1];
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347 | d3b12f5d | Paolo Bonzini | } |
348 | d3b12f5d | Paolo Bonzini | } |
349 | d3b12f5d | Paolo Bonzini | if (found) {
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350 | d3b12f5d | Paolo Bonzini | w->num--; |
351 | d3b12f5d | Paolo Bonzini | } |
352 | d3b12f5d | Paolo Bonzini | } |
353 | d3b12f5d | Paolo Bonzini | |
354 | d3385eb4 | Paolo Bonzini | void qemu_fd_register(int fd) |
355 | d3385eb4 | Paolo Bonzini | { |
356 | 4c8d0d27 | Paolo Bonzini | WSAEventSelect(fd, event_notifier_get_handle(&qemu_aio_context->notifier), |
357 | 4c8d0d27 | Paolo Bonzini | FD_READ | FD_ACCEPT | FD_CLOSE | |
358 | d3385eb4 | Paolo Bonzini | FD_CONNECT | FD_WRITE | FD_OOB); |
359 | d3385eb4 | Paolo Bonzini | } |
360 | d3385eb4 | Paolo Bonzini | |
361 | cbff4b34 | Stefan Hajnoczi | static int pollfds_fill(GArray *pollfds, fd_set *rfds, fd_set *wfds, |
362 | cbff4b34 | Stefan Hajnoczi | fd_set *xfds) |
363 | cbff4b34 | Stefan Hajnoczi | { |
364 | cbff4b34 | Stefan Hajnoczi | int nfds = -1; |
365 | cbff4b34 | Stefan Hajnoczi | int i;
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366 | cbff4b34 | Stefan Hajnoczi | |
367 | cbff4b34 | Stefan Hajnoczi | for (i = 0; i < pollfds->len; i++) { |
368 | cbff4b34 | Stefan Hajnoczi | GPollFD *pfd = &g_array_index(pollfds, GPollFD, i); |
369 | cbff4b34 | Stefan Hajnoczi | int fd = pfd->fd;
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370 | cbff4b34 | Stefan Hajnoczi | int events = pfd->events;
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371 | cbff4b34 | Stefan Hajnoczi | if (events & (G_IO_IN | G_IO_HUP | G_IO_ERR)) {
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372 | cbff4b34 | Stefan Hajnoczi | FD_SET(fd, rfds); |
373 | cbff4b34 | Stefan Hajnoczi | nfds = MAX(nfds, fd); |
374 | cbff4b34 | Stefan Hajnoczi | } |
375 | cbff4b34 | Stefan Hajnoczi | if (events & (G_IO_OUT | G_IO_ERR)) {
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376 | cbff4b34 | Stefan Hajnoczi | FD_SET(fd, wfds); |
377 | cbff4b34 | Stefan Hajnoczi | nfds = MAX(nfds, fd); |
378 | cbff4b34 | Stefan Hajnoczi | } |
379 | cbff4b34 | Stefan Hajnoczi | if (events & G_IO_PRI) {
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380 | cbff4b34 | Stefan Hajnoczi | FD_SET(fd, xfds); |
381 | cbff4b34 | Stefan Hajnoczi | nfds = MAX(nfds, fd); |
382 | cbff4b34 | Stefan Hajnoczi | } |
383 | cbff4b34 | Stefan Hajnoczi | } |
384 | cbff4b34 | Stefan Hajnoczi | return nfds;
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385 | cbff4b34 | Stefan Hajnoczi | } |
386 | cbff4b34 | Stefan Hajnoczi | |
387 | cbff4b34 | Stefan Hajnoczi | static void pollfds_poll(GArray *pollfds, int nfds, fd_set *rfds, |
388 | cbff4b34 | Stefan Hajnoczi | fd_set *wfds, fd_set *xfds) |
389 | cbff4b34 | Stefan Hajnoczi | { |
390 | cbff4b34 | Stefan Hajnoczi | int i;
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391 | cbff4b34 | Stefan Hajnoczi | |
392 | cbff4b34 | Stefan Hajnoczi | for (i = 0; i < pollfds->len; i++) { |
393 | cbff4b34 | Stefan Hajnoczi | GPollFD *pfd = &g_array_index(pollfds, GPollFD, i); |
394 | cbff4b34 | Stefan Hajnoczi | int fd = pfd->fd;
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395 | cbff4b34 | Stefan Hajnoczi | int revents = 0; |
396 | cbff4b34 | Stefan Hajnoczi | |
397 | cbff4b34 | Stefan Hajnoczi | if (FD_ISSET(fd, rfds)) {
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398 | cbff4b34 | Stefan Hajnoczi | revents |= G_IO_IN | G_IO_HUP | G_IO_ERR; |
399 | cbff4b34 | Stefan Hajnoczi | } |
400 | cbff4b34 | Stefan Hajnoczi | if (FD_ISSET(fd, wfds)) {
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401 | cbff4b34 | Stefan Hajnoczi | revents |= G_IO_OUT | G_IO_ERR; |
402 | cbff4b34 | Stefan Hajnoczi | } |
403 | cbff4b34 | Stefan Hajnoczi | if (FD_ISSET(fd, xfds)) {
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404 | cbff4b34 | Stefan Hajnoczi | revents |= G_IO_PRI; |
405 | cbff4b34 | Stefan Hajnoczi | } |
406 | cbff4b34 | Stefan Hajnoczi | pfd->revents = revents & pfd->events; |
407 | cbff4b34 | Stefan Hajnoczi | } |
408 | cbff4b34 | Stefan Hajnoczi | } |
409 | cbff4b34 | Stefan Hajnoczi | |
410 | 7c7db755 | Stefano Stabellini | static int os_host_main_loop_wait(uint32_t timeout) |
411 | d3b12f5d | Paolo Bonzini | { |
412 | ea26ce76 | Paolo Bonzini | GMainContext *context = g_main_context_default(); |
413 | 48ce11ff | Stefan Hajnoczi | GPollFD poll_fds[1024 * 2]; /* this is probably overkill */ |
414 | 134a03e0 | Stefan Hajnoczi | int select_ret = 0; |
415 | 48ce11ff | Stefan Hajnoczi | int g_poll_ret, ret, i, n_poll_fds;
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416 | d3b12f5d | Paolo Bonzini | PollingEntry *pe; |
417 | d3385eb4 | Paolo Bonzini | WaitObjects *w = &wait_objects; |
418 | 42fe1c24 | Stefan Weil | gint poll_timeout; |
419 | 15455536 | Paolo Bonzini | static struct timeval tv0; |
420 | d3b12f5d | Paolo Bonzini | |
421 | d3b12f5d | Paolo Bonzini | /* XXX: need to suppress polling by better using win32 events */
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422 | d3b12f5d | Paolo Bonzini | ret = 0;
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423 | d3b12f5d | Paolo Bonzini | for (pe = first_polling_entry; pe != NULL; pe = pe->next) { |
424 | d3b12f5d | Paolo Bonzini | ret |= pe->func(pe->opaque); |
425 | d3b12f5d | Paolo Bonzini | } |
426 | d3385eb4 | Paolo Bonzini | if (ret != 0) { |
427 | d3385eb4 | Paolo Bonzini | return ret;
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428 | d3385eb4 | Paolo Bonzini | } |
429 | d3b12f5d | Paolo Bonzini | |
430 | ea26ce76 | Paolo Bonzini | g_main_context_prepare(context, &max_priority); |
431 | 42fe1c24 | Stefan Weil | n_poll_fds = g_main_context_query(context, max_priority, &poll_timeout, |
432 | ea26ce76 | Paolo Bonzini | poll_fds, ARRAY_SIZE(poll_fds)); |
433 | ea26ce76 | Paolo Bonzini | g_assert(n_poll_fds <= ARRAY_SIZE(poll_fds)); |
434 | ea26ce76 | Paolo Bonzini | |
435 | 06ac7d49 | Paolo Bonzini | for (i = 0; i < w->num; i++) { |
436 | 58b9630d | Stefan Weil | poll_fds[n_poll_fds + i].fd = (DWORD_PTR)w->events[i]; |
437 | ea26ce76 | Paolo Bonzini | poll_fds[n_poll_fds + i].events = G_IO_IN; |
438 | 06ac7d49 | Paolo Bonzini | } |
439 | 06ac7d49 | Paolo Bonzini | |
440 | 3239ad04 | Stefan Weil | if (poll_timeout < 0 || timeout < poll_timeout) { |
441 | 3239ad04 | Stefan Weil | poll_timeout = timeout; |
442 | 3239ad04 | Stefan Weil | } |
443 | 3239ad04 | Stefan Weil | |
444 | d3385eb4 | Paolo Bonzini | qemu_mutex_unlock_iothread(); |
445 | 5e3bc735 | Fabien Chouteau | g_poll_ret = g_poll(poll_fds, n_poll_fds + w->num, poll_timeout); |
446 | d3385eb4 | Paolo Bonzini | qemu_mutex_lock_iothread(); |
447 | 5e3bc735 | Fabien Chouteau | if (g_poll_ret > 0) { |
448 | 06ac7d49 | Paolo Bonzini | for (i = 0; i < w->num; i++) { |
449 | ea26ce76 | Paolo Bonzini | w->revents[i] = poll_fds[n_poll_fds + i].revents; |
450 | d3385eb4 | Paolo Bonzini | } |
451 | 06ac7d49 | Paolo Bonzini | for (i = 0; i < w->num; i++) { |
452 | 06ac7d49 | Paolo Bonzini | if (w->revents[i] && w->func[i]) {
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453 | 06ac7d49 | Paolo Bonzini | w->func[i](w->opaque[i]); |
454 | d3b12f5d | Paolo Bonzini | } |
455 | d3b12f5d | Paolo Bonzini | } |
456 | d3b12f5d | Paolo Bonzini | } |
457 | d3b12f5d | Paolo Bonzini | |
458 | ea26ce76 | Paolo Bonzini | if (g_main_context_check(context, max_priority, poll_fds, n_poll_fds)) {
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459 | ea26ce76 | Paolo Bonzini | g_main_context_dispatch(context); |
460 | ea26ce76 | Paolo Bonzini | } |
461 | ea26ce76 | Paolo Bonzini | |
462 | 5e3bc735 | Fabien Chouteau | /* Call select after g_poll to avoid a useless iteration and therefore
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463 | 5e3bc735 | Fabien Chouteau | * improve socket latency.
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464 | d3385eb4 | Paolo Bonzini | */
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465 | d3385eb4 | Paolo Bonzini | |
466 | cbff4b34 | Stefan Hajnoczi | /* This back-and-forth between GPollFDs and select(2) is temporary. We'll
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467 | cbff4b34 | Stefan Hajnoczi | * drop it in a couple of patches, I promise :).
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468 | cbff4b34 | Stefan Hajnoczi | */
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469 | cbff4b34 | Stefan Hajnoczi | gpollfds_from_select(); |
470 | cbff4b34 | Stefan Hajnoczi | FD_ZERO(&rfds); |
471 | cbff4b34 | Stefan Hajnoczi | FD_ZERO(&wfds); |
472 | cbff4b34 | Stefan Hajnoczi | FD_ZERO(&xfds); |
473 | cbff4b34 | Stefan Hajnoczi | nfds = pollfds_fill(gpollfds, &rfds, &wfds, &xfds); |
474 | 5e3bc735 | Fabien Chouteau | if (nfds >= 0) { |
475 | 5e3bc735 | Fabien Chouteau | select_ret = select(nfds + 1, &rfds, &wfds, &xfds, &tv0);
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476 | 5e3bc735 | Fabien Chouteau | if (select_ret != 0) { |
477 | 5e3bc735 | Fabien Chouteau | timeout = 0;
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478 | 5e3bc735 | Fabien Chouteau | } |
479 | cbff4b34 | Stefan Hajnoczi | if (select_ret > 0) { |
480 | cbff4b34 | Stefan Hajnoczi | pollfds_poll(gpollfds, nfds, &rfds, &wfds, &xfds); |
481 | cbff4b34 | Stefan Hajnoczi | } |
482 | 5e3bc735 | Fabien Chouteau | } |
483 | cbff4b34 | Stefan Hajnoczi | gpollfds_to_select(select_ret); |
484 | 5e3bc735 | Fabien Chouteau | |
485 | 5e3bc735 | Fabien Chouteau | return select_ret || g_poll_ret;
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486 | d3b12f5d | Paolo Bonzini | } |
487 | d3b12f5d | Paolo Bonzini | #endif
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488 | d3b12f5d | Paolo Bonzini | |
489 | d3b12f5d | Paolo Bonzini | int main_loop_wait(int nonblocking) |
490 | d3b12f5d | Paolo Bonzini | { |
491 | 7c7db755 | Stefano Stabellini | int ret;
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492 | 7c7db755 | Stefano Stabellini | uint32_t timeout = UINT32_MAX; |
493 | d3b12f5d | Paolo Bonzini | |
494 | d3b12f5d | Paolo Bonzini | if (nonblocking) {
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495 | d3b12f5d | Paolo Bonzini | timeout = 0;
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496 | d3b12f5d | Paolo Bonzini | } |
497 | d3b12f5d | Paolo Bonzini | |
498 | d3b12f5d | Paolo Bonzini | /* poll any events */
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499 | cbff4b34 | Stefan Hajnoczi | g_array_set_size(gpollfds, 0); /* reset for new iteration */ |
500 | d3b12f5d | Paolo Bonzini | /* XXX: separate device handlers from system ones */
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501 | d3b12f5d | Paolo Bonzini | nfds = -1;
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502 | d3b12f5d | Paolo Bonzini | FD_ZERO(&rfds); |
503 | d3b12f5d | Paolo Bonzini | FD_ZERO(&wfds); |
504 | d3b12f5d | Paolo Bonzini | FD_ZERO(&xfds); |
505 | d3b12f5d | Paolo Bonzini | |
506 | d3b12f5d | Paolo Bonzini | #ifdef CONFIG_SLIRP
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507 | 7c7db755 | Stefano Stabellini | slirp_update_timeout(&timeout); |
508 | d3b12f5d | Paolo Bonzini | slirp_select_fill(&nfds, &rfds, &wfds, &xfds); |
509 | d3b12f5d | Paolo Bonzini | #endif
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510 | d3b12f5d | Paolo Bonzini | qemu_iohandler_fill(&nfds, &rfds, &wfds, &xfds); |
511 | 15455536 | Paolo Bonzini | ret = os_host_main_loop_wait(timeout); |
512 | d3b12f5d | Paolo Bonzini | qemu_iohandler_poll(&rfds, &wfds, &xfds, ret); |
513 | d3b12f5d | Paolo Bonzini | #ifdef CONFIG_SLIRP
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514 | d3b12f5d | Paolo Bonzini | slirp_select_poll(&rfds, &wfds, &xfds, (ret < 0));
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515 | d3b12f5d | Paolo Bonzini | #endif
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516 | d3b12f5d | Paolo Bonzini | |
517 | d3b12f5d | Paolo Bonzini | qemu_run_all_timers(); |
518 | d3b12f5d | Paolo Bonzini | |
519 | d3b12f5d | Paolo Bonzini | return ret;
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520 | d3b12f5d | Paolo Bonzini | } |
521 | f627aab1 | Paolo Bonzini | |
522 | f627aab1 | Paolo Bonzini | /* Functions to operate on the main QEMU AioContext. */
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523 | f627aab1 | Paolo Bonzini | |
524 | f627aab1 | Paolo Bonzini | QEMUBH *qemu_bh_new(QEMUBHFunc *cb, void *opaque)
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525 | f627aab1 | Paolo Bonzini | { |
526 | f627aab1 | Paolo Bonzini | return aio_bh_new(qemu_aio_context, cb, opaque);
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527 | f627aab1 | Paolo Bonzini | } |
528 | f627aab1 | Paolo Bonzini | |
529 | a915f4bc | Paolo Bonzini | bool qemu_aio_wait(void) |
530 | a915f4bc | Paolo Bonzini | { |
531 | 7c0628b2 | Paolo Bonzini | return aio_poll(qemu_aio_context, true); |
532 | a915f4bc | Paolo Bonzini | } |
533 | a915f4bc | Paolo Bonzini | |
534 | f42b2207 | Paolo Bonzini | #ifdef CONFIG_POSIX
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535 | a915f4bc | Paolo Bonzini | void qemu_aio_set_fd_handler(int fd, |
536 | a915f4bc | Paolo Bonzini | IOHandler *io_read, |
537 | a915f4bc | Paolo Bonzini | IOHandler *io_write, |
538 | a915f4bc | Paolo Bonzini | AioFlushHandler *io_flush, |
539 | a915f4bc | Paolo Bonzini | void *opaque)
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540 | a915f4bc | Paolo Bonzini | { |
541 | a915f4bc | Paolo Bonzini | aio_set_fd_handler(qemu_aio_context, fd, io_read, io_write, io_flush, |
542 | a915f4bc | Paolo Bonzini | opaque); |
543 | a915f4bc | Paolo Bonzini | } |
544 | 82cbbdc6 | Paolo Bonzini | #endif
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545 | a915f4bc | Paolo Bonzini | |
546 | a915f4bc | Paolo Bonzini | void qemu_aio_set_event_notifier(EventNotifier *notifier,
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547 | a915f4bc | Paolo Bonzini | EventNotifierHandler *io_read, |
548 | a915f4bc | Paolo Bonzini | AioFlushEventNotifierHandler *io_flush) |
549 | a915f4bc | Paolo Bonzini | { |
550 | 82cbbdc6 | Paolo Bonzini | aio_set_event_notifier(qemu_aio_context, notifier, io_read, io_flush); |
551 | a915f4bc | Paolo Bonzini | } |