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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 | d3b12f5d | Paolo Bonzini | #include "qemu-timer.h" |
27 | 0ec024f6 | Stefan Weil | #include "slirp/slirp.h" |
28 | 0ec024f6 | Stefan Weil | #include "main-loop.h" |
29 | d3b12f5d | Paolo Bonzini | |
30 | d3b12f5d | Paolo Bonzini | #ifndef _WIN32
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31 | d3b12f5d | Paolo Bonzini | |
32 | 0ec024f6 | Stefan Weil | #include "compatfd.h" |
33 | 0ec024f6 | Stefan Weil | |
34 | d3b12f5d | Paolo Bonzini | static int io_thread_fd = -1; |
35 | d3b12f5d | Paolo Bonzini | |
36 | d3b12f5d | Paolo Bonzini | void qemu_notify_event(void) |
37 | d3b12f5d | Paolo Bonzini | { |
38 | d3b12f5d | Paolo Bonzini | /* Write 8 bytes to be compatible with eventfd. */
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39 | d3b12f5d | Paolo Bonzini | static const uint64_t val = 1; |
40 | d3b12f5d | Paolo Bonzini | ssize_t ret; |
41 | d3b12f5d | Paolo Bonzini | |
42 | d3b12f5d | Paolo Bonzini | if (io_thread_fd == -1) { |
43 | d3b12f5d | Paolo Bonzini | return;
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44 | d3b12f5d | Paolo Bonzini | } |
45 | d3b12f5d | Paolo Bonzini | do {
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46 | d3b12f5d | Paolo Bonzini | ret = write(io_thread_fd, &val, sizeof(val));
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47 | d3b12f5d | Paolo Bonzini | } while (ret < 0 && errno == EINTR); |
48 | d3b12f5d | Paolo Bonzini | |
49 | d3b12f5d | Paolo Bonzini | /* EAGAIN is fine, a read must be pending. */
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50 | d3b12f5d | Paolo Bonzini | if (ret < 0 && errno != EAGAIN) { |
51 | d3b12f5d | Paolo Bonzini | fprintf(stderr, "qemu_notify_event: write() failed: %s\n",
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52 | d3b12f5d | Paolo Bonzini | strerror(errno)); |
53 | d3b12f5d | Paolo Bonzini | exit(1);
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54 | d3b12f5d | Paolo Bonzini | } |
55 | d3b12f5d | Paolo Bonzini | } |
56 | d3b12f5d | Paolo Bonzini | |
57 | d3b12f5d | Paolo Bonzini | static void qemu_event_read(void *opaque) |
58 | d3b12f5d | Paolo Bonzini | { |
59 | d3b12f5d | Paolo Bonzini | int fd = (intptr_t)opaque;
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60 | d3b12f5d | Paolo Bonzini | ssize_t len; |
61 | d3b12f5d | Paolo Bonzini | char buffer[512]; |
62 | d3b12f5d | Paolo Bonzini | |
63 | d3b12f5d | Paolo Bonzini | /* Drain the notify pipe. For eventfd, only 8 bytes will be read. */
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64 | d3b12f5d | Paolo Bonzini | do {
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65 | d3b12f5d | Paolo Bonzini | len = read(fd, buffer, sizeof(buffer));
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66 | d3b12f5d | Paolo Bonzini | } while ((len == -1 && errno == EINTR) || len == sizeof(buffer)); |
67 | d3b12f5d | Paolo Bonzini | } |
68 | d3b12f5d | Paolo Bonzini | |
69 | d3b12f5d | Paolo Bonzini | static int qemu_event_init(void) |
70 | d3b12f5d | Paolo Bonzini | { |
71 | d3b12f5d | Paolo Bonzini | int err;
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72 | d3b12f5d | Paolo Bonzini | int fds[2]; |
73 | d3b12f5d | Paolo Bonzini | |
74 | d3b12f5d | Paolo Bonzini | err = qemu_eventfd(fds); |
75 | d3b12f5d | Paolo Bonzini | if (err == -1) { |
76 | d3b12f5d | Paolo Bonzini | return -errno;
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77 | d3b12f5d | Paolo Bonzini | } |
78 | d3b12f5d | Paolo Bonzini | err = fcntl_setfl(fds[0], O_NONBLOCK);
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79 | d3b12f5d | Paolo Bonzini | if (err < 0) { |
80 | d3b12f5d | Paolo Bonzini | goto fail;
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81 | d3b12f5d | Paolo Bonzini | } |
82 | d3b12f5d | Paolo Bonzini | err = fcntl_setfl(fds[1], O_NONBLOCK);
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83 | d3b12f5d | Paolo Bonzini | if (err < 0) { |
84 | d3b12f5d | Paolo Bonzini | goto fail;
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85 | d3b12f5d | Paolo Bonzini | } |
86 | d3b12f5d | Paolo Bonzini | qemu_set_fd_handler2(fds[0], NULL, qemu_event_read, NULL, |
87 | d3b12f5d | Paolo Bonzini | (void *)(intptr_t)fds[0]); |
88 | d3b12f5d | Paolo Bonzini | |
89 | d3b12f5d | Paolo Bonzini | io_thread_fd = fds[1];
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90 | d3b12f5d | Paolo Bonzini | return 0; |
91 | d3b12f5d | Paolo Bonzini | |
92 | d3b12f5d | Paolo Bonzini | fail:
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93 | d3b12f5d | Paolo Bonzini | close(fds[0]);
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94 | d3b12f5d | Paolo Bonzini | close(fds[1]);
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95 | d3b12f5d | Paolo Bonzini | return err;
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96 | d3b12f5d | Paolo Bonzini | } |
97 | d3b12f5d | Paolo Bonzini | |
98 | d3b12f5d | Paolo Bonzini | /* If we have signalfd, we mask out the signals we want to handle and then
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99 | d3b12f5d | Paolo Bonzini | * use signalfd to listen for them. We rely on whatever the current signal
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100 | d3b12f5d | Paolo Bonzini | * handler is to dispatch the signals when we receive them.
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101 | d3b12f5d | Paolo Bonzini | */
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102 | d3b12f5d | Paolo Bonzini | static void sigfd_handler(void *opaque) |
103 | d3b12f5d | Paolo Bonzini | { |
104 | d3b12f5d | Paolo Bonzini | int fd = (intptr_t)opaque;
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105 | d3b12f5d | Paolo Bonzini | struct qemu_signalfd_siginfo info;
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106 | d3b12f5d | Paolo Bonzini | struct sigaction action;
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107 | d3b12f5d | Paolo Bonzini | ssize_t len; |
108 | d3b12f5d | Paolo Bonzini | |
109 | d3b12f5d | Paolo Bonzini | while (1) { |
110 | d3b12f5d | Paolo Bonzini | do {
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111 | d3b12f5d | Paolo Bonzini | len = read(fd, &info, sizeof(info));
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112 | d3b12f5d | Paolo Bonzini | } while (len == -1 && errno == EINTR); |
113 | d3b12f5d | Paolo Bonzini | |
114 | d3b12f5d | Paolo Bonzini | if (len == -1 && errno == EAGAIN) { |
115 | d3b12f5d | Paolo Bonzini | break;
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116 | d3b12f5d | Paolo Bonzini | } |
117 | d3b12f5d | Paolo Bonzini | |
118 | d3b12f5d | Paolo Bonzini | if (len != sizeof(info)) { |
119 | d3b12f5d | Paolo Bonzini | printf("read from sigfd returned %zd: %m\n", len);
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120 | d3b12f5d | Paolo Bonzini | return;
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121 | d3b12f5d | Paolo Bonzini | } |
122 | d3b12f5d | Paolo Bonzini | |
123 | d3b12f5d | Paolo Bonzini | sigaction(info.ssi_signo, NULL, &action);
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124 | d3b12f5d | Paolo Bonzini | if ((action.sa_flags & SA_SIGINFO) && action.sa_sigaction) {
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125 | d3b12f5d | Paolo Bonzini | action.sa_sigaction(info.ssi_signo, |
126 | d3b12f5d | Paolo Bonzini | (siginfo_t *)&info, NULL);
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127 | d3b12f5d | Paolo Bonzini | } else if (action.sa_handler) { |
128 | d3b12f5d | Paolo Bonzini | action.sa_handler(info.ssi_signo); |
129 | d3b12f5d | Paolo Bonzini | } |
130 | d3b12f5d | Paolo Bonzini | } |
131 | d3b12f5d | Paolo Bonzini | } |
132 | d3b12f5d | Paolo Bonzini | |
133 | d3b12f5d | Paolo Bonzini | static int qemu_signal_init(void) |
134 | d3b12f5d | Paolo Bonzini | { |
135 | d3b12f5d | Paolo Bonzini | int sigfd;
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136 | d3b12f5d | Paolo Bonzini | sigset_t set; |
137 | d3b12f5d | Paolo Bonzini | |
138 | d3b12f5d | Paolo Bonzini | /*
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139 | d3b12f5d | Paolo Bonzini | * SIG_IPI must be blocked in the main thread and must not be caught
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140 | d3b12f5d | Paolo Bonzini | * by sigwait() in the signal thread. Otherwise, the cpu thread will
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141 | d3b12f5d | Paolo Bonzini | * not catch it reliably.
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142 | d3b12f5d | Paolo Bonzini | */
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143 | d3b12f5d | Paolo Bonzini | sigemptyset(&set); |
144 | d3b12f5d | Paolo Bonzini | sigaddset(&set, SIG_IPI); |
145 | d3b12f5d | Paolo Bonzini | sigaddset(&set, SIGIO); |
146 | d3b12f5d | Paolo Bonzini | sigaddset(&set, SIGALRM); |
147 | d3b12f5d | Paolo Bonzini | sigaddset(&set, SIGBUS); |
148 | d3b12f5d | Paolo Bonzini | pthread_sigmask(SIG_BLOCK, &set, NULL);
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149 | d3b12f5d | Paolo Bonzini | |
150 | 4aa7534d | Lai Jiangshan | sigdelset(&set, SIG_IPI); |
151 | d3b12f5d | Paolo Bonzini | sigfd = qemu_signalfd(&set); |
152 | d3b12f5d | Paolo Bonzini | if (sigfd == -1) { |
153 | d3b12f5d | Paolo Bonzini | fprintf(stderr, "failed to create signalfd\n");
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154 | d3b12f5d | Paolo Bonzini | return -errno;
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155 | d3b12f5d | Paolo Bonzini | } |
156 | d3b12f5d | Paolo Bonzini | |
157 | d3b12f5d | Paolo Bonzini | fcntl_setfl(sigfd, O_NONBLOCK); |
158 | d3b12f5d | Paolo Bonzini | |
159 | d3b12f5d | Paolo Bonzini | qemu_set_fd_handler2(sigfd, NULL, sigfd_handler, NULL, |
160 | d3b12f5d | Paolo Bonzini | (void *)(intptr_t)sigfd);
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161 | d3b12f5d | Paolo Bonzini | |
162 | d3b12f5d | Paolo Bonzini | return 0; |
163 | d3b12f5d | Paolo Bonzini | } |
164 | d3b12f5d | Paolo Bonzini | |
165 | d3b12f5d | Paolo Bonzini | #else /* _WIN32 */ |
166 | d3b12f5d | Paolo Bonzini | |
167 | ee77dfb2 | Michael Roth | HANDLE qemu_event_handle = NULL;
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168 | d3b12f5d | Paolo Bonzini | |
169 | d3b12f5d | Paolo Bonzini | static void dummy_event_handler(void *opaque) |
170 | d3b12f5d | Paolo Bonzini | { |
171 | d3b12f5d | Paolo Bonzini | } |
172 | d3b12f5d | Paolo Bonzini | |
173 | d3b12f5d | Paolo Bonzini | static int qemu_event_init(void) |
174 | d3b12f5d | Paolo Bonzini | { |
175 | d3b12f5d | Paolo Bonzini | qemu_event_handle = CreateEvent(NULL, FALSE, FALSE, NULL); |
176 | d3b12f5d | Paolo Bonzini | if (!qemu_event_handle) {
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177 | d3b12f5d | Paolo Bonzini | fprintf(stderr, "Failed CreateEvent: %ld\n", GetLastError());
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178 | d3b12f5d | Paolo Bonzini | return -1; |
179 | d3b12f5d | Paolo Bonzini | } |
180 | d3b12f5d | Paolo Bonzini | qemu_add_wait_object(qemu_event_handle, dummy_event_handler, NULL);
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181 | d3b12f5d | Paolo Bonzini | return 0; |
182 | d3b12f5d | Paolo Bonzini | } |
183 | d3b12f5d | Paolo Bonzini | |
184 | d3b12f5d | Paolo Bonzini | void qemu_notify_event(void) |
185 | d3b12f5d | Paolo Bonzini | { |
186 | ee77dfb2 | Michael Roth | if (!qemu_event_handle) {
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187 | ee77dfb2 | Michael Roth | return;
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188 | ee77dfb2 | Michael Roth | } |
189 | d3b12f5d | Paolo Bonzini | if (!SetEvent(qemu_event_handle)) {
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190 | d3b12f5d | Paolo Bonzini | fprintf(stderr, "qemu_notify_event: SetEvent failed: %ld\n",
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191 | d3b12f5d | Paolo Bonzini | GetLastError()); |
192 | d3b12f5d | Paolo Bonzini | exit(1);
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193 | d3b12f5d | Paolo Bonzini | } |
194 | d3b12f5d | Paolo Bonzini | } |
195 | d3b12f5d | Paolo Bonzini | |
196 | d3b12f5d | Paolo Bonzini | static int qemu_signal_init(void) |
197 | d3b12f5d | Paolo Bonzini | { |
198 | d3b12f5d | Paolo Bonzini | return 0; |
199 | d3b12f5d | Paolo Bonzini | } |
200 | d3b12f5d | Paolo Bonzini | #endif
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201 | d3b12f5d | Paolo Bonzini | |
202 | d34e8f6e | Michael Roth | int main_loop_init(void) |
203 | d3b12f5d | Paolo Bonzini | { |
204 | d3b12f5d | Paolo Bonzini | int ret;
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205 | d3b12f5d | Paolo Bonzini | |
206 | d3b12f5d | Paolo Bonzini | qemu_mutex_lock_iothread(); |
207 | d3b12f5d | Paolo Bonzini | ret = qemu_signal_init(); |
208 | d3b12f5d | Paolo Bonzini | if (ret) {
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209 | d3b12f5d | Paolo Bonzini | return ret;
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210 | d3b12f5d | Paolo Bonzini | } |
211 | d3b12f5d | Paolo Bonzini | |
212 | d3b12f5d | Paolo Bonzini | /* Note eventfd must be drained before signalfd handlers run */
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213 | d3b12f5d | Paolo Bonzini | ret = qemu_event_init(); |
214 | d3b12f5d | Paolo Bonzini | if (ret) {
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215 | d3b12f5d | Paolo Bonzini | return ret;
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216 | d3b12f5d | Paolo Bonzini | } |
217 | d3b12f5d | Paolo Bonzini | |
218 | d3b12f5d | Paolo Bonzini | return 0; |
219 | d3b12f5d | Paolo Bonzini | } |
220 | d3b12f5d | Paolo Bonzini | |
221 | d3b12f5d | Paolo Bonzini | |
222 | d3b12f5d | Paolo Bonzini | static GPollFD poll_fds[1024 * 2]; /* this is probably overkill */ |
223 | d3b12f5d | Paolo Bonzini | static int n_poll_fds; |
224 | d3b12f5d | Paolo Bonzini | static int max_priority; |
225 | d3b12f5d | Paolo Bonzini | |
226 | d3b12f5d | Paolo Bonzini | static void glib_select_fill(int *max_fd, fd_set *rfds, fd_set *wfds, |
227 | d3b12f5d | Paolo Bonzini | fd_set *xfds, struct timeval *tv)
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228 | d3b12f5d | Paolo Bonzini | { |
229 | d3b12f5d | Paolo Bonzini | GMainContext *context = g_main_context_default(); |
230 | d3b12f5d | Paolo Bonzini | int i;
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231 | d3b12f5d | Paolo Bonzini | int timeout = 0, cur_timeout; |
232 | d3b12f5d | Paolo Bonzini | |
233 | d3b12f5d | Paolo Bonzini | g_main_context_prepare(context, &max_priority); |
234 | d3b12f5d | Paolo Bonzini | |
235 | d3b12f5d | Paolo Bonzini | n_poll_fds = g_main_context_query(context, max_priority, &timeout, |
236 | d3b12f5d | Paolo Bonzini | poll_fds, ARRAY_SIZE(poll_fds)); |
237 | d3b12f5d | Paolo Bonzini | g_assert(n_poll_fds <= ARRAY_SIZE(poll_fds)); |
238 | d3b12f5d | Paolo Bonzini | |
239 | d3b12f5d | Paolo Bonzini | for (i = 0; i < n_poll_fds; i++) { |
240 | d3b12f5d | Paolo Bonzini | GPollFD *p = &poll_fds[i]; |
241 | d3b12f5d | Paolo Bonzini | |
242 | d3b12f5d | Paolo Bonzini | if ((p->events & G_IO_IN)) {
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243 | d3b12f5d | Paolo Bonzini | FD_SET(p->fd, rfds); |
244 | d3b12f5d | Paolo Bonzini | *max_fd = MAX(*max_fd, p->fd); |
245 | d3b12f5d | Paolo Bonzini | } |
246 | d3b12f5d | Paolo Bonzini | if ((p->events & G_IO_OUT)) {
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247 | d3b12f5d | Paolo Bonzini | FD_SET(p->fd, wfds); |
248 | d3b12f5d | Paolo Bonzini | *max_fd = MAX(*max_fd, p->fd); |
249 | d3b12f5d | Paolo Bonzini | } |
250 | d3b12f5d | Paolo Bonzini | if ((p->events & G_IO_ERR)) {
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251 | d3b12f5d | Paolo Bonzini | FD_SET(p->fd, xfds); |
252 | d3b12f5d | Paolo Bonzini | *max_fd = MAX(*max_fd, p->fd); |
253 | d3b12f5d | Paolo Bonzini | } |
254 | d3b12f5d | Paolo Bonzini | } |
255 | d3b12f5d | Paolo Bonzini | |
256 | d3b12f5d | Paolo Bonzini | cur_timeout = (tv->tv_sec * 1000) + ((tv->tv_usec + 500) / 1000); |
257 | d3b12f5d | Paolo Bonzini | if (timeout >= 0 && timeout < cur_timeout) { |
258 | d3b12f5d | Paolo Bonzini | tv->tv_sec = timeout / 1000;
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259 | d3b12f5d | Paolo Bonzini | tv->tv_usec = (timeout % 1000) * 1000; |
260 | d3b12f5d | Paolo Bonzini | } |
261 | d3b12f5d | Paolo Bonzini | } |
262 | d3b12f5d | Paolo Bonzini | |
263 | d3b12f5d | Paolo Bonzini | static void glib_select_poll(fd_set *rfds, fd_set *wfds, fd_set *xfds, |
264 | d3b12f5d | Paolo Bonzini | bool err)
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265 | d3b12f5d | Paolo Bonzini | { |
266 | d3b12f5d | Paolo Bonzini | GMainContext *context = g_main_context_default(); |
267 | d3b12f5d | Paolo Bonzini | |
268 | d3b12f5d | Paolo Bonzini | if (!err) {
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269 | d3b12f5d | Paolo Bonzini | int i;
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270 | d3b12f5d | Paolo Bonzini | |
271 | d3b12f5d | Paolo Bonzini | for (i = 0; i < n_poll_fds; i++) { |
272 | d3b12f5d | Paolo Bonzini | GPollFD *p = &poll_fds[i]; |
273 | d3b12f5d | Paolo Bonzini | |
274 | d3b12f5d | Paolo Bonzini | if ((p->events & G_IO_IN) && FD_ISSET(p->fd, rfds)) {
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275 | d3b12f5d | Paolo Bonzini | p->revents |= G_IO_IN; |
276 | d3b12f5d | Paolo Bonzini | } |
277 | d3b12f5d | Paolo Bonzini | if ((p->events & G_IO_OUT) && FD_ISSET(p->fd, wfds)) {
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278 | d3b12f5d | Paolo Bonzini | p->revents |= G_IO_OUT; |
279 | d3b12f5d | Paolo Bonzini | } |
280 | d3b12f5d | Paolo Bonzini | if ((p->events & G_IO_ERR) && FD_ISSET(p->fd, xfds)) {
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281 | d3b12f5d | Paolo Bonzini | p->revents |= G_IO_ERR; |
282 | d3b12f5d | Paolo Bonzini | } |
283 | d3b12f5d | Paolo Bonzini | } |
284 | d3b12f5d | Paolo Bonzini | } |
285 | d3b12f5d | Paolo Bonzini | |
286 | d3b12f5d | Paolo Bonzini | if (g_main_context_check(context, max_priority, poll_fds, n_poll_fds)) {
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287 | d3b12f5d | Paolo Bonzini | g_main_context_dispatch(context); |
288 | d3b12f5d | Paolo Bonzini | } |
289 | d3b12f5d | Paolo Bonzini | } |
290 | d3b12f5d | Paolo Bonzini | |
291 | d3b12f5d | Paolo Bonzini | #ifdef _WIN32
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292 | d3b12f5d | Paolo Bonzini | /***********************************************************/
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293 | d3b12f5d | Paolo Bonzini | /* Polling handling */
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294 | d3b12f5d | Paolo Bonzini | |
295 | d3b12f5d | Paolo Bonzini | typedef struct PollingEntry { |
296 | d3b12f5d | Paolo Bonzini | PollingFunc *func; |
297 | d3b12f5d | Paolo Bonzini | void *opaque;
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298 | d3b12f5d | Paolo Bonzini | struct PollingEntry *next;
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299 | d3b12f5d | Paolo Bonzini | } PollingEntry; |
300 | d3b12f5d | Paolo Bonzini | |
301 | d3b12f5d | Paolo Bonzini | static PollingEntry *first_polling_entry;
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302 | d3b12f5d | Paolo Bonzini | |
303 | d3b12f5d | Paolo Bonzini | int qemu_add_polling_cb(PollingFunc *func, void *opaque) |
304 | d3b12f5d | Paolo Bonzini | { |
305 | d3b12f5d | Paolo Bonzini | PollingEntry **ppe, *pe; |
306 | d3b12f5d | Paolo Bonzini | pe = g_malloc0(sizeof(PollingEntry));
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307 | d3b12f5d | Paolo Bonzini | pe->func = func; |
308 | d3b12f5d | Paolo Bonzini | pe->opaque = opaque; |
309 | d3b12f5d | Paolo Bonzini | for(ppe = &first_polling_entry; *ppe != NULL; ppe = &(*ppe)->next); |
310 | d3b12f5d | Paolo Bonzini | *ppe = pe; |
311 | d3b12f5d | Paolo Bonzini | return 0; |
312 | d3b12f5d | Paolo Bonzini | } |
313 | d3b12f5d | Paolo Bonzini | |
314 | d3b12f5d | Paolo Bonzini | void qemu_del_polling_cb(PollingFunc *func, void *opaque) |
315 | d3b12f5d | Paolo Bonzini | { |
316 | d3b12f5d | Paolo Bonzini | PollingEntry **ppe, *pe; |
317 | d3b12f5d | Paolo Bonzini | for(ppe = &first_polling_entry; *ppe != NULL; ppe = &(*ppe)->next) { |
318 | d3b12f5d | Paolo Bonzini | pe = *ppe; |
319 | d3b12f5d | Paolo Bonzini | if (pe->func == func && pe->opaque == opaque) {
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320 | d3b12f5d | Paolo Bonzini | *ppe = pe->next; |
321 | d3b12f5d | Paolo Bonzini | g_free(pe); |
322 | d3b12f5d | Paolo Bonzini | break;
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323 | d3b12f5d | Paolo Bonzini | } |
324 | d3b12f5d | Paolo Bonzini | } |
325 | d3b12f5d | Paolo Bonzini | } |
326 | d3b12f5d | Paolo Bonzini | |
327 | d3b12f5d | Paolo Bonzini | /***********************************************************/
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328 | d3b12f5d | Paolo Bonzini | /* Wait objects support */
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329 | d3b12f5d | Paolo Bonzini | typedef struct WaitObjects { |
330 | d3b12f5d | Paolo Bonzini | int num;
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331 | d3b12f5d | Paolo Bonzini | HANDLE events[MAXIMUM_WAIT_OBJECTS + 1];
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332 | d3b12f5d | Paolo Bonzini | WaitObjectFunc *func[MAXIMUM_WAIT_OBJECTS + 1];
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333 | d3b12f5d | Paolo Bonzini | void *opaque[MAXIMUM_WAIT_OBJECTS + 1]; |
334 | d3b12f5d | Paolo Bonzini | } WaitObjects; |
335 | d3b12f5d | Paolo Bonzini | |
336 | d3b12f5d | Paolo Bonzini | static WaitObjects wait_objects = {0}; |
337 | d3b12f5d | Paolo Bonzini | |
338 | d3b12f5d | Paolo Bonzini | int qemu_add_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque) |
339 | d3b12f5d | Paolo Bonzini | { |
340 | d3b12f5d | Paolo Bonzini | WaitObjects *w = &wait_objects; |
341 | d3b12f5d | Paolo Bonzini | if (w->num >= MAXIMUM_WAIT_OBJECTS) {
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342 | d3b12f5d | Paolo Bonzini | return -1; |
343 | d3b12f5d | Paolo Bonzini | } |
344 | d3b12f5d | Paolo Bonzini | w->events[w->num] = handle; |
345 | d3b12f5d | Paolo Bonzini | w->func[w->num] = func; |
346 | d3b12f5d | Paolo Bonzini | w->opaque[w->num] = opaque; |
347 | d3b12f5d | Paolo Bonzini | w->num++; |
348 | d3b12f5d | Paolo Bonzini | return 0; |
349 | d3b12f5d | Paolo Bonzini | } |
350 | d3b12f5d | Paolo Bonzini | |
351 | d3b12f5d | Paolo Bonzini | void qemu_del_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque) |
352 | d3b12f5d | Paolo Bonzini | { |
353 | d3b12f5d | Paolo Bonzini | int i, found;
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354 | d3b12f5d | Paolo Bonzini | WaitObjects *w = &wait_objects; |
355 | d3b12f5d | Paolo Bonzini | |
356 | d3b12f5d | Paolo Bonzini | found = 0;
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357 | d3b12f5d | Paolo Bonzini | for (i = 0; i < w->num; i++) { |
358 | d3b12f5d | Paolo Bonzini | if (w->events[i] == handle) {
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359 | d3b12f5d | Paolo Bonzini | found = 1;
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360 | d3b12f5d | Paolo Bonzini | } |
361 | d3b12f5d | Paolo Bonzini | if (found) {
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362 | d3b12f5d | Paolo Bonzini | w->events[i] = w->events[i + 1];
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363 | d3b12f5d | Paolo Bonzini | w->func[i] = w->func[i + 1];
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364 | d3b12f5d | Paolo Bonzini | w->opaque[i] = w->opaque[i + 1];
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365 | d3b12f5d | Paolo Bonzini | } |
366 | d3b12f5d | Paolo Bonzini | } |
367 | d3b12f5d | Paolo Bonzini | if (found) {
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368 | d3b12f5d | Paolo Bonzini | w->num--; |
369 | d3b12f5d | Paolo Bonzini | } |
370 | d3b12f5d | Paolo Bonzini | } |
371 | d3b12f5d | Paolo Bonzini | |
372 | d3b12f5d | Paolo Bonzini | static void os_host_main_loop_wait(int *timeout) |
373 | d3b12f5d | Paolo Bonzini | { |
374 | d3b12f5d | Paolo Bonzini | int ret, ret2, i;
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375 | d3b12f5d | Paolo Bonzini | PollingEntry *pe; |
376 | d3b12f5d | Paolo Bonzini | |
377 | d3b12f5d | Paolo Bonzini | /* XXX: need to suppress polling by better using win32 events */
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378 | d3b12f5d | Paolo Bonzini | ret = 0;
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379 | d3b12f5d | Paolo Bonzini | for (pe = first_polling_entry; pe != NULL; pe = pe->next) { |
380 | d3b12f5d | Paolo Bonzini | ret |= pe->func(pe->opaque); |
381 | d3b12f5d | Paolo Bonzini | } |
382 | d3b12f5d | Paolo Bonzini | if (ret == 0) { |
383 | d3b12f5d | Paolo Bonzini | int err;
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384 | d3b12f5d | Paolo Bonzini | WaitObjects *w = &wait_objects; |
385 | d3b12f5d | Paolo Bonzini | |
386 | d3b12f5d | Paolo Bonzini | qemu_mutex_unlock_iothread(); |
387 | d3b12f5d | Paolo Bonzini | ret = WaitForMultipleObjects(w->num, w->events, FALSE, *timeout); |
388 | d3b12f5d | Paolo Bonzini | qemu_mutex_lock_iothread(); |
389 | d3b12f5d | Paolo Bonzini | if (WAIT_OBJECT_0 + 0 <= ret && ret <= WAIT_OBJECT_0 + w->num - 1) { |
390 | d3b12f5d | Paolo Bonzini | if (w->func[ret - WAIT_OBJECT_0]) {
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391 | d3b12f5d | Paolo Bonzini | w->func[ret - WAIT_OBJECT_0](w->opaque[ret - WAIT_OBJECT_0]); |
392 | d3b12f5d | Paolo Bonzini | } |
393 | d3b12f5d | Paolo Bonzini | |
394 | d3b12f5d | Paolo Bonzini | /* Check for additional signaled events */
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395 | d3b12f5d | Paolo Bonzini | for (i = (ret - WAIT_OBJECT_0 + 1); i < w->num; i++) { |
396 | d3b12f5d | Paolo Bonzini | /* Check if event is signaled */
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397 | d3b12f5d | Paolo Bonzini | ret2 = WaitForSingleObject(w->events[i], 0);
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398 | d3b12f5d | Paolo Bonzini | if (ret2 == WAIT_OBJECT_0) {
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399 | d3b12f5d | Paolo Bonzini | if (w->func[i]) {
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400 | d3b12f5d | Paolo Bonzini | w->func[i](w->opaque[i]); |
401 | d3b12f5d | Paolo Bonzini | } |
402 | d3b12f5d | Paolo Bonzini | } else if (ret2 != WAIT_TIMEOUT) { |
403 | d3b12f5d | Paolo Bonzini | err = GetLastError(); |
404 | d3b12f5d | Paolo Bonzini | fprintf(stderr, "WaitForSingleObject error %d %d\n", i, err);
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405 | d3b12f5d | Paolo Bonzini | } |
406 | d3b12f5d | Paolo Bonzini | } |
407 | d3b12f5d | Paolo Bonzini | } else if (ret != WAIT_TIMEOUT) { |
408 | d3b12f5d | Paolo Bonzini | err = GetLastError(); |
409 | d3b12f5d | Paolo Bonzini | fprintf(stderr, "WaitForMultipleObjects error %d %d\n", ret, err);
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410 | d3b12f5d | Paolo Bonzini | } |
411 | d3b12f5d | Paolo Bonzini | } |
412 | d3b12f5d | Paolo Bonzini | |
413 | d3b12f5d | Paolo Bonzini | *timeout = 0;
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414 | d3b12f5d | Paolo Bonzini | } |
415 | d3b12f5d | Paolo Bonzini | #else
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416 | d3b12f5d | Paolo Bonzini | static inline void os_host_main_loop_wait(int *timeout) |
417 | d3b12f5d | Paolo Bonzini | { |
418 | d3b12f5d | Paolo Bonzini | } |
419 | d3b12f5d | Paolo Bonzini | #endif
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420 | d3b12f5d | Paolo Bonzini | |
421 | d3b12f5d | Paolo Bonzini | int main_loop_wait(int nonblocking) |
422 | d3b12f5d | Paolo Bonzini | { |
423 | d3b12f5d | Paolo Bonzini | fd_set rfds, wfds, xfds; |
424 | d3b12f5d | Paolo Bonzini | int ret, nfds;
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425 | d3b12f5d | Paolo Bonzini | struct timeval tv;
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426 | d3b12f5d | Paolo Bonzini | int timeout;
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427 | d3b12f5d | Paolo Bonzini | |
428 | d3b12f5d | Paolo Bonzini | if (nonblocking) {
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429 | d3b12f5d | Paolo Bonzini | timeout = 0;
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430 | d3b12f5d | Paolo Bonzini | } else {
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431 | d3b12f5d | Paolo Bonzini | timeout = qemu_calculate_timeout(); |
432 | d3b12f5d | Paolo Bonzini | qemu_bh_update_timeout(&timeout); |
433 | d3b12f5d | Paolo Bonzini | } |
434 | d3b12f5d | Paolo Bonzini | |
435 | d3b12f5d | Paolo Bonzini | os_host_main_loop_wait(&timeout); |
436 | d3b12f5d | Paolo Bonzini | |
437 | d3b12f5d | Paolo Bonzini | tv.tv_sec = timeout / 1000;
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438 | d3b12f5d | Paolo Bonzini | tv.tv_usec = (timeout % 1000) * 1000; |
439 | d3b12f5d | Paolo Bonzini | |
440 | d3b12f5d | Paolo Bonzini | /* poll any events */
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441 | d3b12f5d | Paolo Bonzini | /* XXX: separate device handlers from system ones */
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442 | d3b12f5d | Paolo Bonzini | nfds = -1;
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443 | d3b12f5d | Paolo Bonzini | FD_ZERO(&rfds); |
444 | d3b12f5d | Paolo Bonzini | FD_ZERO(&wfds); |
445 | d3b12f5d | Paolo Bonzini | FD_ZERO(&xfds); |
446 | d3b12f5d | Paolo Bonzini | |
447 | d3b12f5d | Paolo Bonzini | #ifdef CONFIG_SLIRP
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448 | d3b12f5d | Paolo Bonzini | slirp_select_fill(&nfds, &rfds, &wfds, &xfds); |
449 | d3b12f5d | Paolo Bonzini | #endif
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450 | d3b12f5d | Paolo Bonzini | qemu_iohandler_fill(&nfds, &rfds, &wfds, &xfds); |
451 | d3b12f5d | Paolo Bonzini | glib_select_fill(&nfds, &rfds, &wfds, &xfds, &tv); |
452 | d3b12f5d | Paolo Bonzini | |
453 | d3b12f5d | Paolo Bonzini | if (timeout > 0) { |
454 | d3b12f5d | Paolo Bonzini | qemu_mutex_unlock_iothread(); |
455 | d3b12f5d | Paolo Bonzini | } |
456 | d3b12f5d | Paolo Bonzini | |
457 | d3b12f5d | Paolo Bonzini | ret = select(nfds + 1, &rfds, &wfds, &xfds, &tv);
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458 | d3b12f5d | Paolo Bonzini | |
459 | d3b12f5d | Paolo Bonzini | if (timeout > 0) { |
460 | d3b12f5d | Paolo Bonzini | qemu_mutex_lock_iothread(); |
461 | d3b12f5d | Paolo Bonzini | } |
462 | d3b12f5d | Paolo Bonzini | |
463 | d3b12f5d | Paolo Bonzini | glib_select_poll(&rfds, &wfds, &xfds, (ret < 0));
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464 | d3b12f5d | Paolo Bonzini | qemu_iohandler_poll(&rfds, &wfds, &xfds, ret); |
465 | d3b12f5d | Paolo Bonzini | #ifdef CONFIG_SLIRP
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466 | d3b12f5d | Paolo Bonzini | slirp_select_poll(&rfds, &wfds, &xfds, (ret < 0));
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467 | d3b12f5d | Paolo Bonzini | #endif
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468 | d3b12f5d | Paolo Bonzini | |
469 | d3b12f5d | Paolo Bonzini | qemu_run_all_timers(); |
470 | d3b12f5d | Paolo Bonzini | |
471 | d3b12f5d | Paolo Bonzini | /* Check bottom-halves last in case any of the earlier events triggered
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472 | d3b12f5d | Paolo Bonzini | them. */
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473 | d3b12f5d | Paolo Bonzini | qemu_bh_poll(); |
474 | d3b12f5d | Paolo Bonzini | |
475 | d3b12f5d | Paolo Bonzini | return ret;
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476 | d3b12f5d | Paolo Bonzini | } |