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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 | #include "config-host.h" |
25 | d3b12f5d | Paolo Bonzini | #include <unistd.h> |
26 | d3b12f5d | Paolo Bonzini | #include <signal.h> |
27 | d3b12f5d | Paolo Bonzini | #include <time.h> |
28 | d3b12f5d | Paolo Bonzini | #include <errno.h> |
29 | d3b12f5d | Paolo Bonzini | #include <sys/time.h> |
30 | d3b12f5d | Paolo Bonzini | #include <stdbool.h> |
31 | d3b12f5d | Paolo Bonzini | |
32 | d3b12f5d | Paolo Bonzini | #ifdef _WIN32
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33 | d3b12f5d | Paolo Bonzini | #include <windows.h> |
34 | d3b12f5d | Paolo Bonzini | #include <winsock2.h> |
35 | d3b12f5d | Paolo Bonzini | #include <ws2tcpip.h> |
36 | d3b12f5d | Paolo Bonzini | #else
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37 | d3b12f5d | Paolo Bonzini | #include <sys/socket.h> |
38 | d3b12f5d | Paolo Bonzini | #include <netinet/in.h> |
39 | d3b12f5d | Paolo Bonzini | #include <net/if.h> |
40 | d3b12f5d | Paolo Bonzini | #include <arpa/inet.h> |
41 | d3b12f5d | Paolo Bonzini | #include <sys/select.h> |
42 | d3b12f5d | Paolo Bonzini | #include <sys/stat.h> |
43 | d3b12f5d | Paolo Bonzini | #include "compatfd.h" |
44 | d3b12f5d | Paolo Bonzini | #endif
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45 | d3b12f5d | Paolo Bonzini | |
46 | d3b12f5d | Paolo Bonzini | #include <glib.h> |
47 | d3b12f5d | Paolo Bonzini | |
48 | d3b12f5d | Paolo Bonzini | #include "main-loop.h" |
49 | d3b12f5d | Paolo Bonzini | #include "qemu-timer.h" |
50 | d3b12f5d | Paolo Bonzini | #include "slirp/libslirp.h" |
51 | d3b12f5d | Paolo Bonzini | |
52 | d3b12f5d | Paolo Bonzini | #ifndef _WIN32
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53 | d3b12f5d | Paolo Bonzini | |
54 | d3b12f5d | Paolo Bonzini | static int io_thread_fd = -1; |
55 | d3b12f5d | Paolo Bonzini | |
56 | d3b12f5d | Paolo Bonzini | void qemu_notify_event(void) |
57 | d3b12f5d | Paolo Bonzini | { |
58 | d3b12f5d | Paolo Bonzini | /* Write 8 bytes to be compatible with eventfd. */
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59 | d3b12f5d | Paolo Bonzini | static const uint64_t val = 1; |
60 | d3b12f5d | Paolo Bonzini | ssize_t ret; |
61 | d3b12f5d | Paolo Bonzini | |
62 | d3b12f5d | Paolo Bonzini | if (io_thread_fd == -1) { |
63 | d3b12f5d | Paolo Bonzini | return;
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64 | d3b12f5d | Paolo Bonzini | } |
65 | d3b12f5d | Paolo Bonzini | do {
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66 | d3b12f5d | Paolo Bonzini | ret = write(io_thread_fd, &val, sizeof(val));
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67 | d3b12f5d | Paolo Bonzini | } while (ret < 0 && errno == EINTR); |
68 | d3b12f5d | Paolo Bonzini | |
69 | d3b12f5d | Paolo Bonzini | /* EAGAIN is fine, a read must be pending. */
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70 | d3b12f5d | Paolo Bonzini | if (ret < 0 && errno != EAGAIN) { |
71 | d3b12f5d | Paolo Bonzini | fprintf(stderr, "qemu_notify_event: write() failed: %s\n",
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72 | d3b12f5d | Paolo Bonzini | strerror(errno)); |
73 | d3b12f5d | Paolo Bonzini | exit(1);
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74 | d3b12f5d | Paolo Bonzini | } |
75 | d3b12f5d | Paolo Bonzini | } |
76 | d3b12f5d | Paolo Bonzini | |
77 | d3b12f5d | Paolo Bonzini | static void qemu_event_read(void *opaque) |
78 | d3b12f5d | Paolo Bonzini | { |
79 | d3b12f5d | Paolo Bonzini | int fd = (intptr_t)opaque;
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80 | d3b12f5d | Paolo Bonzini | ssize_t len; |
81 | d3b12f5d | Paolo Bonzini | char buffer[512]; |
82 | d3b12f5d | Paolo Bonzini | |
83 | d3b12f5d | Paolo Bonzini | /* Drain the notify pipe. For eventfd, only 8 bytes will be read. */
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84 | d3b12f5d | Paolo Bonzini | do {
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85 | d3b12f5d | Paolo Bonzini | len = read(fd, buffer, sizeof(buffer));
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86 | d3b12f5d | Paolo Bonzini | } while ((len == -1 && errno == EINTR) || len == sizeof(buffer)); |
87 | d3b12f5d | Paolo Bonzini | } |
88 | d3b12f5d | Paolo Bonzini | |
89 | d3b12f5d | Paolo Bonzini | static int qemu_event_init(void) |
90 | d3b12f5d | Paolo Bonzini | { |
91 | d3b12f5d | Paolo Bonzini | int err;
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92 | d3b12f5d | Paolo Bonzini | int fds[2]; |
93 | d3b12f5d | Paolo Bonzini | |
94 | d3b12f5d | Paolo Bonzini | err = qemu_eventfd(fds); |
95 | d3b12f5d | Paolo Bonzini | if (err == -1) { |
96 | d3b12f5d | Paolo Bonzini | return -errno;
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97 | d3b12f5d | Paolo Bonzini | } |
98 | d3b12f5d | Paolo Bonzini | err = fcntl_setfl(fds[0], O_NONBLOCK);
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99 | d3b12f5d | Paolo Bonzini | if (err < 0) { |
100 | d3b12f5d | Paolo Bonzini | goto fail;
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101 | d3b12f5d | Paolo Bonzini | } |
102 | d3b12f5d | Paolo Bonzini | err = fcntl_setfl(fds[1], O_NONBLOCK);
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103 | d3b12f5d | Paolo Bonzini | if (err < 0) { |
104 | d3b12f5d | Paolo Bonzini | goto fail;
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105 | d3b12f5d | Paolo Bonzini | } |
106 | d3b12f5d | Paolo Bonzini | qemu_set_fd_handler2(fds[0], NULL, qemu_event_read, NULL, |
107 | d3b12f5d | Paolo Bonzini | (void *)(intptr_t)fds[0]); |
108 | d3b12f5d | Paolo Bonzini | |
109 | d3b12f5d | Paolo Bonzini | io_thread_fd = fds[1];
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110 | d3b12f5d | Paolo Bonzini | return 0; |
111 | d3b12f5d | Paolo Bonzini | |
112 | d3b12f5d | Paolo Bonzini | fail:
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113 | d3b12f5d | Paolo Bonzini | close(fds[0]);
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114 | d3b12f5d | Paolo Bonzini | close(fds[1]);
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115 | d3b12f5d | Paolo Bonzini | return err;
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116 | d3b12f5d | Paolo Bonzini | } |
117 | d3b12f5d | Paolo Bonzini | |
118 | d3b12f5d | Paolo Bonzini | /* If we have signalfd, we mask out the signals we want to handle and then
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119 | d3b12f5d | Paolo Bonzini | * use signalfd to listen for them. We rely on whatever the current signal
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120 | d3b12f5d | Paolo Bonzini | * handler is to dispatch the signals when we receive them.
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121 | d3b12f5d | Paolo Bonzini | */
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122 | d3b12f5d | Paolo Bonzini | static void sigfd_handler(void *opaque) |
123 | d3b12f5d | Paolo Bonzini | { |
124 | d3b12f5d | Paolo Bonzini | int fd = (intptr_t)opaque;
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125 | d3b12f5d | Paolo Bonzini | struct qemu_signalfd_siginfo info;
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126 | d3b12f5d | Paolo Bonzini | struct sigaction action;
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127 | d3b12f5d | Paolo Bonzini | ssize_t len; |
128 | d3b12f5d | Paolo Bonzini | |
129 | d3b12f5d | Paolo Bonzini | while (1) { |
130 | d3b12f5d | Paolo Bonzini | do {
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131 | d3b12f5d | Paolo Bonzini | len = read(fd, &info, sizeof(info));
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132 | d3b12f5d | Paolo Bonzini | } while (len == -1 && errno == EINTR); |
133 | d3b12f5d | Paolo Bonzini | |
134 | d3b12f5d | Paolo Bonzini | if (len == -1 && errno == EAGAIN) { |
135 | d3b12f5d | Paolo Bonzini | break;
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136 | d3b12f5d | Paolo Bonzini | } |
137 | d3b12f5d | Paolo Bonzini | |
138 | d3b12f5d | Paolo Bonzini | if (len != sizeof(info)) { |
139 | d3b12f5d | Paolo Bonzini | printf("read from sigfd returned %zd: %m\n", len);
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140 | d3b12f5d | Paolo Bonzini | return;
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141 | d3b12f5d | Paolo Bonzini | } |
142 | d3b12f5d | Paolo Bonzini | |
143 | d3b12f5d | Paolo Bonzini | sigaction(info.ssi_signo, NULL, &action);
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144 | d3b12f5d | Paolo Bonzini | if ((action.sa_flags & SA_SIGINFO) && action.sa_sigaction) {
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145 | d3b12f5d | Paolo Bonzini | action.sa_sigaction(info.ssi_signo, |
146 | d3b12f5d | Paolo Bonzini | (siginfo_t *)&info, NULL);
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147 | d3b12f5d | Paolo Bonzini | } else if (action.sa_handler) { |
148 | d3b12f5d | Paolo Bonzini | action.sa_handler(info.ssi_signo); |
149 | d3b12f5d | Paolo Bonzini | } |
150 | d3b12f5d | Paolo Bonzini | } |
151 | d3b12f5d | Paolo Bonzini | } |
152 | d3b12f5d | Paolo Bonzini | |
153 | d3b12f5d | Paolo Bonzini | static int qemu_signal_init(void) |
154 | d3b12f5d | Paolo Bonzini | { |
155 | d3b12f5d | Paolo Bonzini | int sigfd;
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156 | d3b12f5d | Paolo Bonzini | sigset_t set; |
157 | d3b12f5d | Paolo Bonzini | |
158 | d3b12f5d | Paolo Bonzini | /*
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159 | d3b12f5d | Paolo Bonzini | * SIG_IPI must be blocked in the main thread and must not be caught
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160 | d3b12f5d | Paolo Bonzini | * by sigwait() in the signal thread. Otherwise, the cpu thread will
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161 | d3b12f5d | Paolo Bonzini | * not catch it reliably.
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162 | d3b12f5d | Paolo Bonzini | */
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163 | d3b12f5d | Paolo Bonzini | sigemptyset(&set); |
164 | d3b12f5d | Paolo Bonzini | sigaddset(&set, SIG_IPI); |
165 | d3b12f5d | Paolo Bonzini | pthread_sigmask(SIG_BLOCK, &set, NULL);
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166 | d3b12f5d | Paolo Bonzini | |
167 | d3b12f5d | Paolo Bonzini | sigemptyset(&set); |
168 | d3b12f5d | Paolo Bonzini | sigaddset(&set, SIGIO); |
169 | d3b12f5d | Paolo Bonzini | sigaddset(&set, SIGALRM); |
170 | d3b12f5d | Paolo Bonzini | sigaddset(&set, SIGBUS); |
171 | d3b12f5d | Paolo Bonzini | pthread_sigmask(SIG_BLOCK, &set, NULL);
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172 | d3b12f5d | Paolo Bonzini | |
173 | d3b12f5d | Paolo Bonzini | sigfd = qemu_signalfd(&set); |
174 | d3b12f5d | Paolo Bonzini | if (sigfd == -1) { |
175 | d3b12f5d | Paolo Bonzini | fprintf(stderr, "failed to create signalfd\n");
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176 | d3b12f5d | Paolo Bonzini | return -errno;
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177 | d3b12f5d | Paolo Bonzini | } |
178 | d3b12f5d | Paolo Bonzini | |
179 | d3b12f5d | Paolo Bonzini | fcntl_setfl(sigfd, O_NONBLOCK); |
180 | d3b12f5d | Paolo Bonzini | |
181 | d3b12f5d | Paolo Bonzini | qemu_set_fd_handler2(sigfd, NULL, sigfd_handler, NULL, |
182 | d3b12f5d | Paolo Bonzini | (void *)(intptr_t)sigfd);
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183 | d3b12f5d | Paolo Bonzini | |
184 | d3b12f5d | Paolo Bonzini | return 0; |
185 | d3b12f5d | Paolo Bonzini | } |
186 | d3b12f5d | Paolo Bonzini | |
187 | d3b12f5d | Paolo Bonzini | #else /* _WIN32 */ |
188 | d3b12f5d | Paolo Bonzini | |
189 | d3b12f5d | Paolo Bonzini | HANDLE qemu_event_handle; |
190 | d3b12f5d | Paolo Bonzini | |
191 | d3b12f5d | Paolo Bonzini | static void dummy_event_handler(void *opaque) |
192 | d3b12f5d | Paolo Bonzini | { |
193 | d3b12f5d | Paolo Bonzini | } |
194 | d3b12f5d | Paolo Bonzini | |
195 | d3b12f5d | Paolo Bonzini | static int qemu_event_init(void) |
196 | d3b12f5d | Paolo Bonzini | { |
197 | d3b12f5d | Paolo Bonzini | qemu_event_handle = CreateEvent(NULL, FALSE, FALSE, NULL); |
198 | d3b12f5d | Paolo Bonzini | if (!qemu_event_handle) {
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199 | d3b12f5d | Paolo Bonzini | fprintf(stderr, "Failed CreateEvent: %ld\n", GetLastError());
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200 | d3b12f5d | Paolo Bonzini | return -1; |
201 | d3b12f5d | Paolo Bonzini | } |
202 | d3b12f5d | Paolo Bonzini | qemu_add_wait_object(qemu_event_handle, dummy_event_handler, NULL);
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203 | d3b12f5d | Paolo Bonzini | return 0; |
204 | d3b12f5d | Paolo Bonzini | } |
205 | d3b12f5d | Paolo Bonzini | |
206 | d3b12f5d | Paolo Bonzini | void qemu_notify_event(void) |
207 | d3b12f5d | Paolo Bonzini | { |
208 | d3b12f5d | Paolo Bonzini | if (!SetEvent(qemu_event_handle)) {
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209 | d3b12f5d | Paolo Bonzini | fprintf(stderr, "qemu_notify_event: SetEvent failed: %ld\n",
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210 | d3b12f5d | Paolo Bonzini | GetLastError()); |
211 | d3b12f5d | Paolo Bonzini | exit(1);
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212 | d3b12f5d | Paolo Bonzini | } |
213 | d3b12f5d | Paolo Bonzini | } |
214 | d3b12f5d | Paolo Bonzini | |
215 | d3b12f5d | Paolo Bonzini | static int qemu_signal_init(void) |
216 | d3b12f5d | Paolo Bonzini | { |
217 | d3b12f5d | Paolo Bonzini | return 0; |
218 | d3b12f5d | Paolo Bonzini | } |
219 | d3b12f5d | Paolo Bonzini | #endif
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220 | d3b12f5d | Paolo Bonzini | |
221 | d3b12f5d | Paolo Bonzini | int qemu_init_main_loop(void) |
222 | d3b12f5d | Paolo Bonzini | { |
223 | d3b12f5d | Paolo Bonzini | int ret;
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224 | d3b12f5d | Paolo Bonzini | |
225 | d3b12f5d | Paolo Bonzini | qemu_mutex_lock_iothread(); |
226 | d3b12f5d | Paolo Bonzini | ret = qemu_signal_init(); |
227 | d3b12f5d | Paolo Bonzini | if (ret) {
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228 | d3b12f5d | Paolo Bonzini | return ret;
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229 | d3b12f5d | Paolo Bonzini | } |
230 | d3b12f5d | Paolo Bonzini | |
231 | d3b12f5d | Paolo Bonzini | /* Note eventfd must be drained before signalfd handlers run */
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232 | d3b12f5d | Paolo Bonzini | ret = qemu_event_init(); |
233 | d3b12f5d | Paolo Bonzini | if (ret) {
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234 | d3b12f5d | Paolo Bonzini | return ret;
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235 | d3b12f5d | Paolo Bonzini | } |
236 | d3b12f5d | Paolo Bonzini | |
237 | d3b12f5d | Paolo Bonzini | return 0; |
238 | d3b12f5d | Paolo Bonzini | } |
239 | d3b12f5d | Paolo Bonzini | |
240 | d3b12f5d | Paolo Bonzini | |
241 | d3b12f5d | Paolo Bonzini | static GPollFD poll_fds[1024 * 2]; /* this is probably overkill */ |
242 | d3b12f5d | Paolo Bonzini | static int n_poll_fds; |
243 | d3b12f5d | Paolo Bonzini | static int max_priority; |
244 | d3b12f5d | Paolo Bonzini | |
245 | d3b12f5d | Paolo Bonzini | static void glib_select_fill(int *max_fd, fd_set *rfds, fd_set *wfds, |
246 | d3b12f5d | Paolo Bonzini | fd_set *xfds, struct timeval *tv)
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247 | d3b12f5d | Paolo Bonzini | { |
248 | d3b12f5d | Paolo Bonzini | GMainContext *context = g_main_context_default(); |
249 | d3b12f5d | Paolo Bonzini | int i;
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250 | d3b12f5d | Paolo Bonzini | int timeout = 0, cur_timeout; |
251 | d3b12f5d | Paolo Bonzini | |
252 | d3b12f5d | Paolo Bonzini | g_main_context_prepare(context, &max_priority); |
253 | d3b12f5d | Paolo Bonzini | |
254 | d3b12f5d | Paolo Bonzini | n_poll_fds = g_main_context_query(context, max_priority, &timeout, |
255 | d3b12f5d | Paolo Bonzini | poll_fds, ARRAY_SIZE(poll_fds)); |
256 | d3b12f5d | Paolo Bonzini | g_assert(n_poll_fds <= ARRAY_SIZE(poll_fds)); |
257 | d3b12f5d | Paolo Bonzini | |
258 | d3b12f5d | Paolo Bonzini | for (i = 0; i < n_poll_fds; i++) { |
259 | d3b12f5d | Paolo Bonzini | GPollFD *p = &poll_fds[i]; |
260 | d3b12f5d | Paolo Bonzini | |
261 | d3b12f5d | Paolo Bonzini | if ((p->events & G_IO_IN)) {
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262 | d3b12f5d | Paolo Bonzini | FD_SET(p->fd, rfds); |
263 | d3b12f5d | Paolo Bonzini | *max_fd = MAX(*max_fd, p->fd); |
264 | d3b12f5d | Paolo Bonzini | } |
265 | d3b12f5d | Paolo Bonzini | if ((p->events & G_IO_OUT)) {
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266 | d3b12f5d | Paolo Bonzini | FD_SET(p->fd, wfds); |
267 | d3b12f5d | Paolo Bonzini | *max_fd = MAX(*max_fd, p->fd); |
268 | d3b12f5d | Paolo Bonzini | } |
269 | d3b12f5d | Paolo Bonzini | if ((p->events & G_IO_ERR)) {
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270 | d3b12f5d | Paolo Bonzini | FD_SET(p->fd, xfds); |
271 | d3b12f5d | Paolo Bonzini | *max_fd = MAX(*max_fd, p->fd); |
272 | d3b12f5d | Paolo Bonzini | } |
273 | d3b12f5d | Paolo Bonzini | } |
274 | d3b12f5d | Paolo Bonzini | |
275 | d3b12f5d | Paolo Bonzini | cur_timeout = (tv->tv_sec * 1000) + ((tv->tv_usec + 500) / 1000); |
276 | d3b12f5d | Paolo Bonzini | if (timeout >= 0 && timeout < cur_timeout) { |
277 | d3b12f5d | Paolo Bonzini | tv->tv_sec = timeout / 1000;
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278 | d3b12f5d | Paolo Bonzini | tv->tv_usec = (timeout % 1000) * 1000; |
279 | d3b12f5d | Paolo Bonzini | } |
280 | d3b12f5d | Paolo Bonzini | } |
281 | d3b12f5d | Paolo Bonzini | |
282 | d3b12f5d | Paolo Bonzini | static void glib_select_poll(fd_set *rfds, fd_set *wfds, fd_set *xfds, |
283 | d3b12f5d | Paolo Bonzini | bool err)
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284 | d3b12f5d | Paolo Bonzini | { |
285 | d3b12f5d | Paolo Bonzini | GMainContext *context = g_main_context_default(); |
286 | d3b12f5d | Paolo Bonzini | |
287 | d3b12f5d | Paolo Bonzini | if (!err) {
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288 | d3b12f5d | Paolo Bonzini | int i;
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289 | d3b12f5d | Paolo Bonzini | |
290 | d3b12f5d | Paolo Bonzini | for (i = 0; i < n_poll_fds; i++) { |
291 | d3b12f5d | Paolo Bonzini | GPollFD *p = &poll_fds[i]; |
292 | d3b12f5d | Paolo Bonzini | |
293 | d3b12f5d | Paolo Bonzini | if ((p->events & G_IO_IN) && FD_ISSET(p->fd, rfds)) {
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294 | d3b12f5d | Paolo Bonzini | p->revents |= G_IO_IN; |
295 | d3b12f5d | Paolo Bonzini | } |
296 | d3b12f5d | Paolo Bonzini | if ((p->events & G_IO_OUT) && FD_ISSET(p->fd, wfds)) {
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297 | d3b12f5d | Paolo Bonzini | p->revents |= G_IO_OUT; |
298 | d3b12f5d | Paolo Bonzini | } |
299 | d3b12f5d | Paolo Bonzini | if ((p->events & G_IO_ERR) && FD_ISSET(p->fd, xfds)) {
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300 | d3b12f5d | Paolo Bonzini | p->revents |= G_IO_ERR; |
301 | d3b12f5d | Paolo Bonzini | } |
302 | d3b12f5d | Paolo Bonzini | } |
303 | d3b12f5d | Paolo Bonzini | } |
304 | d3b12f5d | Paolo Bonzini | |
305 | d3b12f5d | Paolo Bonzini | if (g_main_context_check(context, max_priority, poll_fds, n_poll_fds)) {
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306 | d3b12f5d | Paolo Bonzini | g_main_context_dispatch(context); |
307 | d3b12f5d | Paolo Bonzini | } |
308 | d3b12f5d | Paolo Bonzini | } |
309 | d3b12f5d | Paolo Bonzini | |
310 | d3b12f5d | Paolo Bonzini | #ifdef _WIN32
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311 | d3b12f5d | Paolo Bonzini | /***********************************************************/
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312 | d3b12f5d | Paolo Bonzini | /* Polling handling */
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313 | d3b12f5d | Paolo Bonzini | |
314 | d3b12f5d | Paolo Bonzini | typedef struct PollingEntry { |
315 | d3b12f5d | Paolo Bonzini | PollingFunc *func; |
316 | d3b12f5d | Paolo Bonzini | void *opaque;
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317 | d3b12f5d | Paolo Bonzini | struct PollingEntry *next;
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318 | d3b12f5d | Paolo Bonzini | } PollingEntry; |
319 | d3b12f5d | Paolo Bonzini | |
320 | d3b12f5d | Paolo Bonzini | static PollingEntry *first_polling_entry;
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321 | d3b12f5d | Paolo Bonzini | |
322 | d3b12f5d | Paolo Bonzini | int qemu_add_polling_cb(PollingFunc *func, void *opaque) |
323 | d3b12f5d | Paolo Bonzini | { |
324 | d3b12f5d | Paolo Bonzini | PollingEntry **ppe, *pe; |
325 | d3b12f5d | Paolo Bonzini | pe = g_malloc0(sizeof(PollingEntry));
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326 | d3b12f5d | Paolo Bonzini | pe->func = func; |
327 | d3b12f5d | Paolo Bonzini | pe->opaque = opaque; |
328 | d3b12f5d | Paolo Bonzini | for(ppe = &first_polling_entry; *ppe != NULL; ppe = &(*ppe)->next); |
329 | d3b12f5d | Paolo Bonzini | *ppe = pe; |
330 | d3b12f5d | Paolo Bonzini | return 0; |
331 | d3b12f5d | Paolo Bonzini | } |
332 | d3b12f5d | Paolo Bonzini | |
333 | d3b12f5d | Paolo Bonzini | void qemu_del_polling_cb(PollingFunc *func, void *opaque) |
334 | d3b12f5d | Paolo Bonzini | { |
335 | d3b12f5d | Paolo Bonzini | PollingEntry **ppe, *pe; |
336 | d3b12f5d | Paolo Bonzini | for(ppe = &first_polling_entry; *ppe != NULL; ppe = &(*ppe)->next) { |
337 | d3b12f5d | Paolo Bonzini | pe = *ppe; |
338 | d3b12f5d | Paolo Bonzini | if (pe->func == func && pe->opaque == opaque) {
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339 | d3b12f5d | Paolo Bonzini | *ppe = pe->next; |
340 | d3b12f5d | Paolo Bonzini | g_free(pe); |
341 | d3b12f5d | Paolo Bonzini | break;
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342 | d3b12f5d | Paolo Bonzini | } |
343 | d3b12f5d | Paolo Bonzini | } |
344 | d3b12f5d | Paolo Bonzini | } |
345 | d3b12f5d | Paolo Bonzini | |
346 | d3b12f5d | Paolo Bonzini | /***********************************************************/
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347 | d3b12f5d | Paolo Bonzini | /* Wait objects support */
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348 | d3b12f5d | Paolo Bonzini | typedef struct WaitObjects { |
349 | d3b12f5d | Paolo Bonzini | int num;
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350 | d3b12f5d | Paolo Bonzini | HANDLE events[MAXIMUM_WAIT_OBJECTS + 1];
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351 | d3b12f5d | Paolo Bonzini | WaitObjectFunc *func[MAXIMUM_WAIT_OBJECTS + 1];
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352 | d3b12f5d | Paolo Bonzini | void *opaque[MAXIMUM_WAIT_OBJECTS + 1]; |
353 | d3b12f5d | Paolo Bonzini | } WaitObjects; |
354 | d3b12f5d | Paolo Bonzini | |
355 | d3b12f5d | Paolo Bonzini | static WaitObjects wait_objects = {0}; |
356 | d3b12f5d | Paolo Bonzini | |
357 | d3b12f5d | Paolo Bonzini | int qemu_add_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque) |
358 | d3b12f5d | Paolo Bonzini | { |
359 | d3b12f5d | Paolo Bonzini | WaitObjects *w = &wait_objects; |
360 | d3b12f5d | Paolo Bonzini | if (w->num >= MAXIMUM_WAIT_OBJECTS) {
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361 | d3b12f5d | Paolo Bonzini | return -1; |
362 | d3b12f5d | Paolo Bonzini | } |
363 | d3b12f5d | Paolo Bonzini | w->events[w->num] = handle; |
364 | d3b12f5d | Paolo Bonzini | w->func[w->num] = func; |
365 | d3b12f5d | Paolo Bonzini | w->opaque[w->num] = opaque; |
366 | d3b12f5d | Paolo Bonzini | w->num++; |
367 | d3b12f5d | Paolo Bonzini | return 0; |
368 | d3b12f5d | Paolo Bonzini | } |
369 | d3b12f5d | Paolo Bonzini | |
370 | d3b12f5d | Paolo Bonzini | void qemu_del_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque) |
371 | d3b12f5d | Paolo Bonzini | { |
372 | d3b12f5d | Paolo Bonzini | int i, found;
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373 | d3b12f5d | Paolo Bonzini | WaitObjects *w = &wait_objects; |
374 | d3b12f5d | Paolo Bonzini | |
375 | d3b12f5d | Paolo Bonzini | found = 0;
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376 | d3b12f5d | Paolo Bonzini | for (i = 0; i < w->num; i++) { |
377 | d3b12f5d | Paolo Bonzini | if (w->events[i] == handle) {
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378 | d3b12f5d | Paolo Bonzini | found = 1;
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379 | d3b12f5d | Paolo Bonzini | } |
380 | d3b12f5d | Paolo Bonzini | if (found) {
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381 | d3b12f5d | Paolo Bonzini | w->events[i] = w->events[i + 1];
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382 | d3b12f5d | Paolo Bonzini | w->func[i] = w->func[i + 1];
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383 | d3b12f5d | Paolo Bonzini | w->opaque[i] = w->opaque[i + 1];
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384 | d3b12f5d | Paolo Bonzini | } |
385 | d3b12f5d | Paolo Bonzini | } |
386 | d3b12f5d | Paolo Bonzini | if (found) {
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387 | d3b12f5d | Paolo Bonzini | w->num--; |
388 | d3b12f5d | Paolo Bonzini | } |
389 | d3b12f5d | Paolo Bonzini | } |
390 | d3b12f5d | Paolo Bonzini | |
391 | d3b12f5d | Paolo Bonzini | static void os_host_main_loop_wait(int *timeout) |
392 | d3b12f5d | Paolo Bonzini | { |
393 | d3b12f5d | Paolo Bonzini | int ret, ret2, i;
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394 | d3b12f5d | Paolo Bonzini | PollingEntry *pe; |
395 | d3b12f5d | Paolo Bonzini | |
396 | d3b12f5d | Paolo Bonzini | /* XXX: need to suppress polling by better using win32 events */
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397 | d3b12f5d | Paolo Bonzini | ret = 0;
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398 | d3b12f5d | Paolo Bonzini | for (pe = first_polling_entry; pe != NULL; pe = pe->next) { |
399 | d3b12f5d | Paolo Bonzini | ret |= pe->func(pe->opaque); |
400 | d3b12f5d | Paolo Bonzini | } |
401 | d3b12f5d | Paolo Bonzini | if (ret == 0) { |
402 | d3b12f5d | Paolo Bonzini | int err;
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403 | d3b12f5d | Paolo Bonzini | WaitObjects *w = &wait_objects; |
404 | d3b12f5d | Paolo Bonzini | |
405 | d3b12f5d | Paolo Bonzini | qemu_mutex_unlock_iothread(); |
406 | d3b12f5d | Paolo Bonzini | ret = WaitForMultipleObjects(w->num, w->events, FALSE, *timeout); |
407 | d3b12f5d | Paolo Bonzini | qemu_mutex_lock_iothread(); |
408 | d3b12f5d | Paolo Bonzini | if (WAIT_OBJECT_0 + 0 <= ret && ret <= WAIT_OBJECT_0 + w->num - 1) { |
409 | d3b12f5d | Paolo Bonzini | if (w->func[ret - WAIT_OBJECT_0]) {
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410 | d3b12f5d | Paolo Bonzini | w->func[ret - WAIT_OBJECT_0](w->opaque[ret - WAIT_OBJECT_0]); |
411 | d3b12f5d | Paolo Bonzini | } |
412 | d3b12f5d | Paolo Bonzini | |
413 | d3b12f5d | Paolo Bonzini | /* Check for additional signaled events */
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414 | d3b12f5d | Paolo Bonzini | for (i = (ret - WAIT_OBJECT_0 + 1); i < w->num; i++) { |
415 | d3b12f5d | Paolo Bonzini | /* Check if event is signaled */
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416 | d3b12f5d | Paolo Bonzini | ret2 = WaitForSingleObject(w->events[i], 0);
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417 | d3b12f5d | Paolo Bonzini | if (ret2 == WAIT_OBJECT_0) {
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418 | d3b12f5d | Paolo Bonzini | if (w->func[i]) {
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419 | d3b12f5d | Paolo Bonzini | w->func[i](w->opaque[i]); |
420 | d3b12f5d | Paolo Bonzini | } |
421 | d3b12f5d | Paolo Bonzini | } else if (ret2 != WAIT_TIMEOUT) { |
422 | d3b12f5d | Paolo Bonzini | err = GetLastError(); |
423 | d3b12f5d | Paolo Bonzini | fprintf(stderr, "WaitForSingleObject error %d %d\n", i, err);
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424 | d3b12f5d | Paolo Bonzini | } |
425 | d3b12f5d | Paolo Bonzini | } |
426 | d3b12f5d | Paolo Bonzini | } else if (ret != WAIT_TIMEOUT) { |
427 | d3b12f5d | Paolo Bonzini | err = GetLastError(); |
428 | d3b12f5d | Paolo Bonzini | fprintf(stderr, "WaitForMultipleObjects error %d %d\n", ret, err);
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429 | d3b12f5d | Paolo Bonzini | } |
430 | d3b12f5d | Paolo Bonzini | } |
431 | d3b12f5d | Paolo Bonzini | |
432 | d3b12f5d | Paolo Bonzini | *timeout = 0;
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433 | d3b12f5d | Paolo Bonzini | } |
434 | d3b12f5d | Paolo Bonzini | #else
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435 | d3b12f5d | Paolo Bonzini | static inline void os_host_main_loop_wait(int *timeout) |
436 | d3b12f5d | Paolo Bonzini | { |
437 | d3b12f5d | Paolo Bonzini | } |
438 | d3b12f5d | Paolo Bonzini | #endif
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439 | d3b12f5d | Paolo Bonzini | |
440 | d3b12f5d | Paolo Bonzini | int main_loop_wait(int nonblocking) |
441 | d3b12f5d | Paolo Bonzini | { |
442 | d3b12f5d | Paolo Bonzini | fd_set rfds, wfds, xfds; |
443 | d3b12f5d | Paolo Bonzini | int ret, nfds;
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444 | d3b12f5d | Paolo Bonzini | struct timeval tv;
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445 | d3b12f5d | Paolo Bonzini | int timeout;
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446 | d3b12f5d | Paolo Bonzini | |
447 | d3b12f5d | Paolo Bonzini | if (nonblocking) {
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448 | d3b12f5d | Paolo Bonzini | timeout = 0;
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449 | d3b12f5d | Paolo Bonzini | } else {
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450 | d3b12f5d | Paolo Bonzini | timeout = qemu_calculate_timeout(); |
451 | d3b12f5d | Paolo Bonzini | qemu_bh_update_timeout(&timeout); |
452 | d3b12f5d | Paolo Bonzini | } |
453 | d3b12f5d | Paolo Bonzini | |
454 | d3b12f5d | Paolo Bonzini | os_host_main_loop_wait(&timeout); |
455 | d3b12f5d | Paolo Bonzini | |
456 | d3b12f5d | Paolo Bonzini | tv.tv_sec = timeout / 1000;
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457 | d3b12f5d | Paolo Bonzini | tv.tv_usec = (timeout % 1000) * 1000; |
458 | d3b12f5d | Paolo Bonzini | |
459 | d3b12f5d | Paolo Bonzini | /* poll any events */
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460 | d3b12f5d | Paolo Bonzini | /* XXX: separate device handlers from system ones */
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461 | d3b12f5d | Paolo Bonzini | nfds = -1;
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462 | d3b12f5d | Paolo Bonzini | FD_ZERO(&rfds); |
463 | d3b12f5d | Paolo Bonzini | FD_ZERO(&wfds); |
464 | d3b12f5d | Paolo Bonzini | FD_ZERO(&xfds); |
465 | d3b12f5d | Paolo Bonzini | |
466 | d3b12f5d | Paolo Bonzini | #ifdef CONFIG_SLIRP
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467 | d3b12f5d | Paolo Bonzini | slirp_select_fill(&nfds, &rfds, &wfds, &xfds); |
468 | d3b12f5d | Paolo Bonzini | #endif
|
469 | d3b12f5d | Paolo Bonzini | qemu_iohandler_fill(&nfds, &rfds, &wfds, &xfds); |
470 | d3b12f5d | Paolo Bonzini | glib_select_fill(&nfds, &rfds, &wfds, &xfds, &tv); |
471 | d3b12f5d | Paolo Bonzini | |
472 | d3b12f5d | Paolo Bonzini | if (timeout > 0) { |
473 | d3b12f5d | Paolo Bonzini | qemu_mutex_unlock_iothread(); |
474 | d3b12f5d | Paolo Bonzini | } |
475 | d3b12f5d | Paolo Bonzini | |
476 | d3b12f5d | Paolo Bonzini | ret = select(nfds + 1, &rfds, &wfds, &xfds, &tv);
|
477 | d3b12f5d | Paolo Bonzini | |
478 | d3b12f5d | Paolo Bonzini | if (timeout > 0) { |
479 | d3b12f5d | Paolo Bonzini | qemu_mutex_lock_iothread(); |
480 | d3b12f5d | Paolo Bonzini | } |
481 | d3b12f5d | Paolo Bonzini | |
482 | d3b12f5d | Paolo Bonzini | glib_select_poll(&rfds, &wfds, &xfds, (ret < 0));
|
483 | d3b12f5d | Paolo Bonzini | qemu_iohandler_poll(&rfds, &wfds, &xfds, ret); |
484 | d3b12f5d | Paolo Bonzini | #ifdef CONFIG_SLIRP
|
485 | d3b12f5d | Paolo Bonzini | slirp_select_poll(&rfds, &wfds, &xfds, (ret < 0));
|
486 | d3b12f5d | Paolo Bonzini | #endif
|
487 | d3b12f5d | Paolo Bonzini | |
488 | d3b12f5d | Paolo Bonzini | qemu_run_all_timers(); |
489 | d3b12f5d | Paolo Bonzini | |
490 | d3b12f5d | Paolo Bonzini | /* Check bottom-halves last in case any of the earlier events triggered
|
491 | d3b12f5d | Paolo Bonzini | them. */
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492 | d3b12f5d | Paolo Bonzini | qemu_bh_poll(); |
493 | d3b12f5d | Paolo Bonzini | |
494 | d3b12f5d | Paolo Bonzini | return ret;
|
495 | d3b12f5d | Paolo Bonzini | } |