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1 | d3b12f5d | Paolo Bonzini | /*
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2 | d3b12f5d | Paolo Bonzini | * QEMU System Emulator
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3 | d3b12f5d | Paolo Bonzini | *
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4 | d3b12f5d | Paolo Bonzini | * Copyright (c) 2003-2008 Fabrice Bellard
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5 | d3b12f5d | Paolo Bonzini | *
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6 | d3b12f5d | Paolo Bonzini | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | d3b12f5d | Paolo Bonzini | * of this software and associated documentation files (the "Software"), to deal
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8 | d3b12f5d | Paolo Bonzini | * in the Software without restriction, including without limitation the rights
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9 | d3b12f5d | Paolo Bonzini | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | d3b12f5d | Paolo Bonzini | * copies of the Software, and to permit persons to whom the Software is
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11 | d3b12f5d | Paolo Bonzini | * furnished to do so, subject to the following conditions:
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12 | d3b12f5d | Paolo Bonzini | *
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13 | d3b12f5d | Paolo Bonzini | * The above copyright notice and this permission notice shall be included in
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14 | d3b12f5d | Paolo Bonzini | * all copies or substantial portions of the Software.
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15 | d3b12f5d | Paolo Bonzini | *
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16 | d3b12f5d | Paolo Bonzini | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | d3b12f5d | Paolo Bonzini | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | d3b12f5d | Paolo Bonzini | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | d3b12f5d | Paolo Bonzini | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | d3b12f5d | Paolo Bonzini | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | d3b12f5d | Paolo Bonzini | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | d3b12f5d | Paolo Bonzini | * THE SOFTWARE.
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23 | d3b12f5d | Paolo Bonzini | */
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24 | d3b12f5d | Paolo Bonzini | |
25 | 0ec024f6 | Stefan Weil | #include "qemu-common.h" |
26 | 1de7afc9 | Paolo Bonzini | #include "qemu/timer.h" |
27 | 520b6dd4 | Michael Tokarev | #include "qemu/sockets.h" // struct in_addr needed for libslirp.h |
28 | 520b6dd4 | Michael Tokarev | #include "slirp/libslirp.h" |
29 | 1de7afc9 | Paolo Bonzini | #include "qemu/main-loop.h" |
30 | 737e150e | Paolo Bonzini | #include "block/aio.h" |
31 | d3b12f5d | Paolo Bonzini | |
32 | d3b12f5d | Paolo Bonzini | #ifndef _WIN32
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33 | d3b12f5d | Paolo Bonzini | |
34 | 1de7afc9 | Paolo Bonzini | #include "qemu/compatfd.h" |
35 | 0ec024f6 | Stefan Weil | |
36 | d3b12f5d | Paolo Bonzini | /* If we have signalfd, we mask out the signals we want to handle and then
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37 | d3b12f5d | Paolo Bonzini | * use signalfd to listen for them. We rely on whatever the current signal
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38 | d3b12f5d | Paolo Bonzini | * handler is to dispatch the signals when we receive them.
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39 | d3b12f5d | Paolo Bonzini | */
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40 | d3b12f5d | Paolo Bonzini | static void sigfd_handler(void *opaque) |
41 | d3b12f5d | Paolo Bonzini | { |
42 | d3b12f5d | Paolo Bonzini | int fd = (intptr_t)opaque;
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43 | d3b12f5d | Paolo Bonzini | struct qemu_signalfd_siginfo info;
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44 | d3b12f5d | Paolo Bonzini | struct sigaction action;
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45 | d3b12f5d | Paolo Bonzini | ssize_t len; |
46 | d3b12f5d | Paolo Bonzini | |
47 | d3b12f5d | Paolo Bonzini | while (1) { |
48 | d3b12f5d | Paolo Bonzini | do {
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49 | d3b12f5d | Paolo Bonzini | len = read(fd, &info, sizeof(info));
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50 | d3b12f5d | Paolo Bonzini | } while (len == -1 && errno == EINTR); |
51 | d3b12f5d | Paolo Bonzini | |
52 | d3b12f5d | Paolo Bonzini | if (len == -1 && errno == EAGAIN) { |
53 | d3b12f5d | Paolo Bonzini | break;
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54 | d3b12f5d | Paolo Bonzini | } |
55 | d3b12f5d | Paolo Bonzini | |
56 | d3b12f5d | Paolo Bonzini | if (len != sizeof(info)) { |
57 | d3b12f5d | Paolo Bonzini | printf("read from sigfd returned %zd: %m\n", len);
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58 | d3b12f5d | Paolo Bonzini | return;
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59 | d3b12f5d | Paolo Bonzini | } |
60 | d3b12f5d | Paolo Bonzini | |
61 | d3b12f5d | Paolo Bonzini | sigaction(info.ssi_signo, NULL, &action);
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62 | d3b12f5d | Paolo Bonzini | if ((action.sa_flags & SA_SIGINFO) && action.sa_sigaction) {
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63 | d3b12f5d | Paolo Bonzini | action.sa_sigaction(info.ssi_signo, |
64 | d3b12f5d | Paolo Bonzini | (siginfo_t *)&info, NULL);
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65 | d3b12f5d | Paolo Bonzini | } else if (action.sa_handler) { |
66 | d3b12f5d | Paolo Bonzini | action.sa_handler(info.ssi_signo); |
67 | d3b12f5d | Paolo Bonzini | } |
68 | d3b12f5d | Paolo Bonzini | } |
69 | d3b12f5d | Paolo Bonzini | } |
70 | d3b12f5d | Paolo Bonzini | |
71 | d3b12f5d | Paolo Bonzini | static int qemu_signal_init(void) |
72 | d3b12f5d | Paolo Bonzini | { |
73 | d3b12f5d | Paolo Bonzini | int sigfd;
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74 | d3b12f5d | Paolo Bonzini | sigset_t set; |
75 | d3b12f5d | Paolo Bonzini | |
76 | d3b12f5d | Paolo Bonzini | /*
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77 | d3b12f5d | Paolo Bonzini | * SIG_IPI must be blocked in the main thread and must not be caught
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78 | d3b12f5d | Paolo Bonzini | * by sigwait() in the signal thread. Otherwise, the cpu thread will
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79 | d3b12f5d | Paolo Bonzini | * not catch it reliably.
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80 | d3b12f5d | Paolo Bonzini | */
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81 | d3b12f5d | Paolo Bonzini | sigemptyset(&set); |
82 | d3b12f5d | Paolo Bonzini | sigaddset(&set, SIG_IPI); |
83 | d3b12f5d | Paolo Bonzini | sigaddset(&set, SIGIO); |
84 | d3b12f5d | Paolo Bonzini | sigaddset(&set, SIGALRM); |
85 | d3b12f5d | Paolo Bonzini | sigaddset(&set, SIGBUS); |
86 | d3b12f5d | Paolo Bonzini | pthread_sigmask(SIG_BLOCK, &set, NULL);
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87 | d3b12f5d | Paolo Bonzini | |
88 | 4aa7534d | Lai Jiangshan | sigdelset(&set, SIG_IPI); |
89 | d3b12f5d | Paolo Bonzini | sigfd = qemu_signalfd(&set); |
90 | d3b12f5d | Paolo Bonzini | if (sigfd == -1) { |
91 | d3b12f5d | Paolo Bonzini | fprintf(stderr, "failed to create signalfd\n");
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92 | d3b12f5d | Paolo Bonzini | return -errno;
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93 | d3b12f5d | Paolo Bonzini | } |
94 | d3b12f5d | Paolo Bonzini | |
95 | d3b12f5d | Paolo Bonzini | fcntl_setfl(sigfd, O_NONBLOCK); |
96 | d3b12f5d | Paolo Bonzini | |
97 | d3b12f5d | Paolo Bonzini | qemu_set_fd_handler2(sigfd, NULL, sigfd_handler, NULL, |
98 | d3b12f5d | Paolo Bonzini | (void *)(intptr_t)sigfd);
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99 | d3b12f5d | Paolo Bonzini | |
100 | d3b12f5d | Paolo Bonzini | return 0; |
101 | d3b12f5d | Paolo Bonzini | } |
102 | d3b12f5d | Paolo Bonzini | |
103 | d3b12f5d | Paolo Bonzini | #else /* _WIN32 */ |
104 | d3b12f5d | Paolo Bonzini | |
105 | 4c8d0d27 | Paolo Bonzini | static int qemu_signal_init(void) |
106 | d3b12f5d | Paolo Bonzini | { |
107 | d3b12f5d | Paolo Bonzini | return 0; |
108 | d3b12f5d | Paolo Bonzini | } |
109 | 4c8d0d27 | Paolo Bonzini | #endif
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110 | 4c8d0d27 | Paolo Bonzini | |
111 | 4c8d0d27 | Paolo Bonzini | static AioContext *qemu_aio_context;
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112 | d3b12f5d | Paolo Bonzini | |
113 | 5f3aa1ff | Stefan Hajnoczi | AioContext *qemu_get_aio_context(void)
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114 | 5f3aa1ff | Stefan Hajnoczi | { |
115 | 5f3aa1ff | Stefan Hajnoczi | return qemu_aio_context;
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116 | 5f3aa1ff | Stefan Hajnoczi | } |
117 | 5f3aa1ff | Stefan Hajnoczi | |
118 | d3b12f5d | Paolo Bonzini | void qemu_notify_event(void) |
119 | d3b12f5d | Paolo Bonzini | { |
120 | 4c8d0d27 | Paolo Bonzini | if (!qemu_aio_context) {
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121 | ee77dfb2 | Michael Roth | return;
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122 | ee77dfb2 | Michael Roth | } |
123 | 4c8d0d27 | Paolo Bonzini | aio_notify(qemu_aio_context); |
124 | d3b12f5d | Paolo Bonzini | } |
125 | d3b12f5d | Paolo Bonzini | |
126 | cbff4b34 | Stefan Hajnoczi | static GArray *gpollfds;
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127 | cbff4b34 | Stefan Hajnoczi | |
128 | 172061a0 | Paolo Bonzini | int qemu_init_main_loop(void) |
129 | d3b12f5d | Paolo Bonzini | { |
130 | d3b12f5d | Paolo Bonzini | int ret;
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131 | 82cbbdc6 | Paolo Bonzini | GSource *src; |
132 | d3b12f5d | Paolo Bonzini | |
133 | 172061a0 | Paolo Bonzini | init_clocks(); |
134 | f9ab4654 | Paolo Bonzini | if (init_timer_alarm() < 0) { |
135 | f9ab4654 | Paolo Bonzini | fprintf(stderr, "could not initialize alarm timer\n");
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136 | f9ab4654 | Paolo Bonzini | exit(1);
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137 | f9ab4654 | Paolo Bonzini | } |
138 | 172061a0 | Paolo Bonzini | |
139 | d3b12f5d | Paolo Bonzini | ret = qemu_signal_init(); |
140 | d3b12f5d | Paolo Bonzini | if (ret) {
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141 | d3b12f5d | Paolo Bonzini | return ret;
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142 | d3b12f5d | Paolo Bonzini | } |
143 | d3b12f5d | Paolo Bonzini | |
144 | cbff4b34 | Stefan Hajnoczi | gpollfds = g_array_new(FALSE, FALSE, sizeof(GPollFD));
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145 | f627aab1 | Paolo Bonzini | qemu_aio_context = aio_context_new(); |
146 | 82cbbdc6 | Paolo Bonzini | src = aio_get_g_source(qemu_aio_context); |
147 | 82cbbdc6 | Paolo Bonzini | g_source_attach(src, NULL);
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148 | 82cbbdc6 | Paolo Bonzini | g_source_unref(src); |
149 | d3b12f5d | Paolo Bonzini | return 0; |
150 | d3b12f5d | Paolo Bonzini | } |
151 | d3b12f5d | Paolo Bonzini | |
152 | d3b12f5d | Paolo Bonzini | static int max_priority; |
153 | d3b12f5d | Paolo Bonzini | |
154 | ea26ce76 | Paolo Bonzini | #ifndef _WIN32
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155 | 48ce11ff | Stefan Hajnoczi | static int glib_pollfds_idx; |
156 | 48ce11ff | Stefan Hajnoczi | static int glib_n_poll_fds; |
157 | 48ce11ff | Stefan Hajnoczi | |
158 | 48ce11ff | Stefan Hajnoczi | static void glib_pollfds_fill(uint32_t *cur_timeout) |
159 | d3b12f5d | Paolo Bonzini | { |
160 | d3b12f5d | Paolo Bonzini | GMainContext *context = g_main_context_default(); |
161 | 4dae83ae | Paolo Bonzini | int timeout = 0; |
162 | 48ce11ff | Stefan Hajnoczi | int n;
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163 | d3b12f5d | Paolo Bonzini | |
164 | d3b12f5d | Paolo Bonzini | g_main_context_prepare(context, &max_priority); |
165 | d3b12f5d | Paolo Bonzini | |
166 | 48ce11ff | Stefan Hajnoczi | glib_pollfds_idx = gpollfds->len; |
167 | 48ce11ff | Stefan Hajnoczi | n = glib_n_poll_fds; |
168 | 48ce11ff | Stefan Hajnoczi | do {
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169 | 48ce11ff | Stefan Hajnoczi | GPollFD *pfds; |
170 | 48ce11ff | Stefan Hajnoczi | glib_n_poll_fds = n; |
171 | 48ce11ff | Stefan Hajnoczi | g_array_set_size(gpollfds, glib_pollfds_idx + glib_n_poll_fds); |
172 | 48ce11ff | Stefan Hajnoczi | pfds = &g_array_index(gpollfds, GPollFD, glib_pollfds_idx); |
173 | 48ce11ff | Stefan Hajnoczi | n = g_main_context_query(context, max_priority, &timeout, pfds, |
174 | 48ce11ff | Stefan Hajnoczi | glib_n_poll_fds); |
175 | 48ce11ff | Stefan Hajnoczi | } while (n != glib_n_poll_fds);
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176 | d3b12f5d | Paolo Bonzini | |
177 | 4dae83ae | Paolo Bonzini | if (timeout >= 0 && timeout < *cur_timeout) { |
178 | 4dae83ae | Paolo Bonzini | *cur_timeout = timeout; |
179 | d3b12f5d | Paolo Bonzini | } |
180 | d3b12f5d | Paolo Bonzini | } |
181 | d3b12f5d | Paolo Bonzini | |
182 | 48ce11ff | Stefan Hajnoczi | static void glib_pollfds_poll(void) |
183 | d3b12f5d | Paolo Bonzini | { |
184 | d3b12f5d | Paolo Bonzini | GMainContext *context = g_main_context_default(); |
185 | 48ce11ff | Stefan Hajnoczi | GPollFD *pfds = &g_array_index(gpollfds, GPollFD, glib_pollfds_idx); |
186 | d3b12f5d | Paolo Bonzini | |
187 | 48ce11ff | Stefan Hajnoczi | if (g_main_context_check(context, max_priority, pfds, glib_n_poll_fds)) {
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188 | d3b12f5d | Paolo Bonzini | g_main_context_dispatch(context); |
189 | d3b12f5d | Paolo Bonzini | } |
190 | d3b12f5d | Paolo Bonzini | } |
191 | d3b12f5d | Paolo Bonzini | |
192 | 893986fe | Anthony Liguori | #define MAX_MAIN_LOOP_SPIN (1000) |
193 | 893986fe | Anthony Liguori | |
194 | 7c7db755 | Stefano Stabellini | static int os_host_main_loop_wait(uint32_t timeout) |
195 | 15455536 | Paolo Bonzini | { |
196 | 15455536 | Paolo Bonzini | int ret;
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197 | 893986fe | Anthony Liguori | static int spin_counter; |
198 | 15455536 | Paolo Bonzini | |
199 | 48ce11ff | Stefan Hajnoczi | glib_pollfds_fill(&timeout); |
200 | 15455536 | Paolo Bonzini | |
201 | 893986fe | Anthony Liguori | /* If the I/O thread is very busy or we are incorrectly busy waiting in
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202 | 893986fe | Anthony Liguori | * the I/O thread, this can lead to starvation of the BQL such that the
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203 | 893986fe | Anthony Liguori | * VCPU threads never run. To make sure we can detect the later case,
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204 | 893986fe | Anthony Liguori | * print a message to the screen. If we run into this condition, create
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205 | 893986fe | Anthony Liguori | * a fake timeout in order to give the VCPU threads a chance to run.
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206 | 893986fe | Anthony Liguori | */
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207 | 893986fe | Anthony Liguori | if (spin_counter > MAX_MAIN_LOOP_SPIN) {
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208 | 893986fe | Anthony Liguori | static bool notified; |
209 | 893986fe | Anthony Liguori | |
210 | 893986fe | Anthony Liguori | if (!notified) {
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211 | 893986fe | Anthony Liguori | fprintf(stderr, |
212 | 893986fe | Anthony Liguori | "main-loop: WARNING: I/O thread spun for %d iterations\n",
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213 | 893986fe | Anthony Liguori | MAX_MAIN_LOOP_SPIN); |
214 | 893986fe | Anthony Liguori | notified = true;
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215 | 893986fe | Anthony Liguori | } |
216 | 893986fe | Anthony Liguori | |
217 | 893986fe | Anthony Liguori | timeout = 1;
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218 | 893986fe | Anthony Liguori | } |
219 | 893986fe | Anthony Liguori | |
220 | 15455536 | Paolo Bonzini | if (timeout > 0) { |
221 | 893986fe | Anthony Liguori | spin_counter = 0;
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222 | 15455536 | Paolo Bonzini | qemu_mutex_unlock_iothread(); |
223 | 893986fe | Anthony Liguori | } else {
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224 | 893986fe | Anthony Liguori | spin_counter++; |
225 | 15455536 | Paolo Bonzini | } |
226 | 15455536 | Paolo Bonzini | |
227 | cbff4b34 | Stefan Hajnoczi | ret = g_poll((GPollFD *)gpollfds->data, gpollfds->len, timeout); |
228 | cbff4b34 | Stefan Hajnoczi | |
229 | 15455536 | Paolo Bonzini | if (timeout > 0) { |
230 | 15455536 | Paolo Bonzini | qemu_mutex_lock_iothread(); |
231 | 15455536 | Paolo Bonzini | } |
232 | 15455536 | Paolo Bonzini | |
233 | 48ce11ff | Stefan Hajnoczi | glib_pollfds_poll(); |
234 | 15455536 | Paolo Bonzini | return ret;
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235 | 15455536 | Paolo Bonzini | } |
236 | 15455536 | Paolo Bonzini | #else
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237 | d3b12f5d | Paolo Bonzini | /***********************************************************/
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238 | d3b12f5d | Paolo Bonzini | /* Polling handling */
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239 | d3b12f5d | Paolo Bonzini | |
240 | d3b12f5d | Paolo Bonzini | typedef struct PollingEntry { |
241 | d3b12f5d | Paolo Bonzini | PollingFunc *func; |
242 | d3b12f5d | Paolo Bonzini | void *opaque;
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243 | d3b12f5d | Paolo Bonzini | struct PollingEntry *next;
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244 | d3b12f5d | Paolo Bonzini | } PollingEntry; |
245 | d3b12f5d | Paolo Bonzini | |
246 | d3b12f5d | Paolo Bonzini | static PollingEntry *first_polling_entry;
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247 | d3b12f5d | Paolo Bonzini | |
248 | d3b12f5d | Paolo Bonzini | int qemu_add_polling_cb(PollingFunc *func, void *opaque) |
249 | d3b12f5d | Paolo Bonzini | { |
250 | d3b12f5d | Paolo Bonzini | PollingEntry **ppe, *pe; |
251 | d3b12f5d | Paolo Bonzini | pe = g_malloc0(sizeof(PollingEntry));
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252 | d3b12f5d | Paolo Bonzini | pe->func = func; |
253 | d3b12f5d | Paolo Bonzini | pe->opaque = opaque; |
254 | d3b12f5d | Paolo Bonzini | for(ppe = &first_polling_entry; *ppe != NULL; ppe = &(*ppe)->next); |
255 | d3b12f5d | Paolo Bonzini | *ppe = pe; |
256 | d3b12f5d | Paolo Bonzini | return 0; |
257 | d3b12f5d | Paolo Bonzini | } |
258 | d3b12f5d | Paolo Bonzini | |
259 | d3b12f5d | Paolo Bonzini | void qemu_del_polling_cb(PollingFunc *func, void *opaque) |
260 | d3b12f5d | Paolo Bonzini | { |
261 | d3b12f5d | Paolo Bonzini | PollingEntry **ppe, *pe; |
262 | d3b12f5d | Paolo Bonzini | for(ppe = &first_polling_entry; *ppe != NULL; ppe = &(*ppe)->next) { |
263 | d3b12f5d | Paolo Bonzini | pe = *ppe; |
264 | d3b12f5d | Paolo Bonzini | if (pe->func == func && pe->opaque == opaque) {
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265 | d3b12f5d | Paolo Bonzini | *ppe = pe->next; |
266 | d3b12f5d | Paolo Bonzini | g_free(pe); |
267 | d3b12f5d | Paolo Bonzini | break;
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268 | d3b12f5d | Paolo Bonzini | } |
269 | d3b12f5d | Paolo Bonzini | } |
270 | d3b12f5d | Paolo Bonzini | } |
271 | d3b12f5d | Paolo Bonzini | |
272 | d3b12f5d | Paolo Bonzini | /***********************************************************/
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273 | d3b12f5d | Paolo Bonzini | /* Wait objects support */
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274 | d3b12f5d | Paolo Bonzini | typedef struct WaitObjects { |
275 | d3b12f5d | Paolo Bonzini | int num;
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276 | 06ac7d49 | Paolo Bonzini | int revents[MAXIMUM_WAIT_OBJECTS + 1]; |
277 | d3b12f5d | Paolo Bonzini | HANDLE events[MAXIMUM_WAIT_OBJECTS + 1];
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278 | d3b12f5d | Paolo Bonzini | WaitObjectFunc *func[MAXIMUM_WAIT_OBJECTS + 1];
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279 | d3b12f5d | Paolo Bonzini | void *opaque[MAXIMUM_WAIT_OBJECTS + 1]; |
280 | d3b12f5d | Paolo Bonzini | } WaitObjects; |
281 | d3b12f5d | Paolo Bonzini | |
282 | d3b12f5d | Paolo Bonzini | static WaitObjects wait_objects = {0}; |
283 | d3b12f5d | Paolo Bonzini | |
284 | d3b12f5d | Paolo Bonzini | int qemu_add_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque) |
285 | d3b12f5d | Paolo Bonzini | { |
286 | d3b12f5d | Paolo Bonzini | WaitObjects *w = &wait_objects; |
287 | d3b12f5d | Paolo Bonzini | if (w->num >= MAXIMUM_WAIT_OBJECTS) {
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288 | d3b12f5d | Paolo Bonzini | return -1; |
289 | d3b12f5d | Paolo Bonzini | } |
290 | d3b12f5d | Paolo Bonzini | w->events[w->num] = handle; |
291 | d3b12f5d | Paolo Bonzini | w->func[w->num] = func; |
292 | d3b12f5d | Paolo Bonzini | w->opaque[w->num] = opaque; |
293 | 06ac7d49 | Paolo Bonzini | w->revents[w->num] = 0;
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294 | d3b12f5d | Paolo Bonzini | w->num++; |
295 | d3b12f5d | Paolo Bonzini | return 0; |
296 | d3b12f5d | Paolo Bonzini | } |
297 | d3b12f5d | Paolo Bonzini | |
298 | d3b12f5d | Paolo Bonzini | void qemu_del_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque) |
299 | d3b12f5d | Paolo Bonzini | { |
300 | d3b12f5d | Paolo Bonzini | int i, found;
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301 | d3b12f5d | Paolo Bonzini | WaitObjects *w = &wait_objects; |
302 | d3b12f5d | Paolo Bonzini | |
303 | d3b12f5d | Paolo Bonzini | found = 0;
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304 | d3b12f5d | Paolo Bonzini | for (i = 0; i < w->num; i++) { |
305 | d3b12f5d | Paolo Bonzini | if (w->events[i] == handle) {
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306 | d3b12f5d | Paolo Bonzini | found = 1;
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307 | d3b12f5d | Paolo Bonzini | } |
308 | d3b12f5d | Paolo Bonzini | if (found) {
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309 | d3b12f5d | Paolo Bonzini | w->events[i] = w->events[i + 1];
|
310 | d3b12f5d | Paolo Bonzini | w->func[i] = w->func[i + 1];
|
311 | d3b12f5d | Paolo Bonzini | w->opaque[i] = w->opaque[i + 1];
|
312 | 06ac7d49 | Paolo Bonzini | w->revents[i] = w->revents[i + 1];
|
313 | d3b12f5d | Paolo Bonzini | } |
314 | d3b12f5d | Paolo Bonzini | } |
315 | d3b12f5d | Paolo Bonzini | if (found) {
|
316 | d3b12f5d | Paolo Bonzini | w->num--; |
317 | d3b12f5d | Paolo Bonzini | } |
318 | d3b12f5d | Paolo Bonzini | } |
319 | d3b12f5d | Paolo Bonzini | |
320 | d3385eb4 | Paolo Bonzini | void qemu_fd_register(int fd) |
321 | d3385eb4 | Paolo Bonzini | { |
322 | 4c8d0d27 | Paolo Bonzini | WSAEventSelect(fd, event_notifier_get_handle(&qemu_aio_context->notifier), |
323 | 4c8d0d27 | Paolo Bonzini | FD_READ | FD_ACCEPT | FD_CLOSE | |
324 | d3385eb4 | Paolo Bonzini | FD_CONNECT | FD_WRITE | FD_OOB); |
325 | d3385eb4 | Paolo Bonzini | } |
326 | d3385eb4 | Paolo Bonzini | |
327 | cbff4b34 | Stefan Hajnoczi | static int pollfds_fill(GArray *pollfds, fd_set *rfds, fd_set *wfds, |
328 | cbff4b34 | Stefan Hajnoczi | fd_set *xfds) |
329 | cbff4b34 | Stefan Hajnoczi | { |
330 | cbff4b34 | Stefan Hajnoczi | int nfds = -1; |
331 | cbff4b34 | Stefan Hajnoczi | int i;
|
332 | cbff4b34 | Stefan Hajnoczi | |
333 | cbff4b34 | Stefan Hajnoczi | for (i = 0; i < pollfds->len; i++) { |
334 | cbff4b34 | Stefan Hajnoczi | GPollFD *pfd = &g_array_index(pollfds, GPollFD, i); |
335 | cbff4b34 | Stefan Hajnoczi | int fd = pfd->fd;
|
336 | cbff4b34 | Stefan Hajnoczi | int events = pfd->events;
|
337 | 8db165b3 | Stefan Hajnoczi | if (events & G_IO_IN) {
|
338 | cbff4b34 | Stefan Hajnoczi | FD_SET(fd, rfds); |
339 | cbff4b34 | Stefan Hajnoczi | nfds = MAX(nfds, fd); |
340 | cbff4b34 | Stefan Hajnoczi | } |
341 | 8db165b3 | Stefan Hajnoczi | if (events & G_IO_OUT) {
|
342 | cbff4b34 | Stefan Hajnoczi | FD_SET(fd, wfds); |
343 | cbff4b34 | Stefan Hajnoczi | nfds = MAX(nfds, fd); |
344 | cbff4b34 | Stefan Hajnoczi | } |
345 | cbff4b34 | Stefan Hajnoczi | if (events & G_IO_PRI) {
|
346 | cbff4b34 | Stefan Hajnoczi | FD_SET(fd, xfds); |
347 | cbff4b34 | Stefan Hajnoczi | nfds = MAX(nfds, fd); |
348 | cbff4b34 | Stefan Hajnoczi | } |
349 | cbff4b34 | Stefan Hajnoczi | } |
350 | cbff4b34 | Stefan Hajnoczi | return nfds;
|
351 | cbff4b34 | Stefan Hajnoczi | } |
352 | cbff4b34 | Stefan Hajnoczi | |
353 | cbff4b34 | Stefan Hajnoczi | static void pollfds_poll(GArray *pollfds, int nfds, fd_set *rfds, |
354 | cbff4b34 | Stefan Hajnoczi | fd_set *wfds, fd_set *xfds) |
355 | cbff4b34 | Stefan Hajnoczi | { |
356 | cbff4b34 | Stefan Hajnoczi | int i;
|
357 | cbff4b34 | Stefan Hajnoczi | |
358 | cbff4b34 | Stefan Hajnoczi | for (i = 0; i < pollfds->len; i++) { |
359 | cbff4b34 | Stefan Hajnoczi | GPollFD *pfd = &g_array_index(pollfds, GPollFD, i); |
360 | cbff4b34 | Stefan Hajnoczi | int fd = pfd->fd;
|
361 | cbff4b34 | Stefan Hajnoczi | int revents = 0; |
362 | cbff4b34 | Stefan Hajnoczi | |
363 | cbff4b34 | Stefan Hajnoczi | if (FD_ISSET(fd, rfds)) {
|
364 | 8db165b3 | Stefan Hajnoczi | revents |= G_IO_IN; |
365 | cbff4b34 | Stefan Hajnoczi | } |
366 | cbff4b34 | Stefan Hajnoczi | if (FD_ISSET(fd, wfds)) {
|
367 | 8db165b3 | Stefan Hajnoczi | revents |= G_IO_OUT; |
368 | cbff4b34 | Stefan Hajnoczi | } |
369 | cbff4b34 | Stefan Hajnoczi | if (FD_ISSET(fd, xfds)) {
|
370 | cbff4b34 | Stefan Hajnoczi | revents |= G_IO_PRI; |
371 | cbff4b34 | Stefan Hajnoczi | } |
372 | cbff4b34 | Stefan Hajnoczi | pfd->revents = revents & pfd->events; |
373 | cbff4b34 | Stefan Hajnoczi | } |
374 | cbff4b34 | Stefan Hajnoczi | } |
375 | cbff4b34 | Stefan Hajnoczi | |
376 | 7c7db755 | Stefano Stabellini | static int os_host_main_loop_wait(uint32_t timeout) |
377 | d3b12f5d | Paolo Bonzini | { |
378 | ea26ce76 | Paolo Bonzini | GMainContext *context = g_main_context_default(); |
379 | 48ce11ff | Stefan Hajnoczi | GPollFD poll_fds[1024 * 2]; /* this is probably overkill */ |
380 | 134a03e0 | Stefan Hajnoczi | int select_ret = 0; |
381 | 48ce11ff | Stefan Hajnoczi | int g_poll_ret, ret, i, n_poll_fds;
|
382 | d3b12f5d | Paolo Bonzini | PollingEntry *pe; |
383 | d3385eb4 | Paolo Bonzini | WaitObjects *w = &wait_objects; |
384 | 42fe1c24 | Stefan Weil | gint poll_timeout; |
385 | 15455536 | Paolo Bonzini | static struct timeval tv0; |
386 | 9cbaacf9 | Stefan Hajnoczi | fd_set rfds, wfds, xfds; |
387 | 9cbaacf9 | Stefan Hajnoczi | int nfds;
|
388 | d3b12f5d | Paolo Bonzini | |
389 | d3b12f5d | Paolo Bonzini | /* XXX: need to suppress polling by better using win32 events */
|
390 | d3b12f5d | Paolo Bonzini | ret = 0;
|
391 | d3b12f5d | Paolo Bonzini | for (pe = first_polling_entry; pe != NULL; pe = pe->next) { |
392 | d3b12f5d | Paolo Bonzini | ret |= pe->func(pe->opaque); |
393 | d3b12f5d | Paolo Bonzini | } |
394 | d3385eb4 | Paolo Bonzini | if (ret != 0) { |
395 | d3385eb4 | Paolo Bonzini | return ret;
|
396 | d3385eb4 | Paolo Bonzini | } |
397 | d3b12f5d | Paolo Bonzini | |
398 | 3cb8c205 | Stefan Hajnoczi | FD_ZERO(&rfds); |
399 | 3cb8c205 | Stefan Hajnoczi | FD_ZERO(&wfds); |
400 | 3cb8c205 | Stefan Hajnoczi | FD_ZERO(&xfds); |
401 | 3cb8c205 | Stefan Hajnoczi | nfds = pollfds_fill(gpollfds, &rfds, &wfds, &xfds); |
402 | 3cb8c205 | Stefan Hajnoczi | if (nfds >= 0) { |
403 | 3cb8c205 | Stefan Hajnoczi | select_ret = select(nfds + 1, &rfds, &wfds, &xfds, &tv0);
|
404 | 3cb8c205 | Stefan Hajnoczi | if (select_ret != 0) { |
405 | 3cb8c205 | Stefan Hajnoczi | timeout = 0;
|
406 | 3cb8c205 | Stefan Hajnoczi | } |
407 | 3cb8c205 | Stefan Hajnoczi | if (select_ret > 0) { |
408 | 3cb8c205 | Stefan Hajnoczi | pollfds_poll(gpollfds, nfds, &rfds, &wfds, &xfds); |
409 | 3cb8c205 | Stefan Hajnoczi | } |
410 | 3cb8c205 | Stefan Hajnoczi | } |
411 | 3cb8c205 | Stefan Hajnoczi | |
412 | ea26ce76 | Paolo Bonzini | g_main_context_prepare(context, &max_priority); |
413 | 42fe1c24 | Stefan Weil | n_poll_fds = g_main_context_query(context, max_priority, &poll_timeout, |
414 | ea26ce76 | Paolo Bonzini | poll_fds, ARRAY_SIZE(poll_fds)); |
415 | ea26ce76 | Paolo Bonzini | g_assert(n_poll_fds <= ARRAY_SIZE(poll_fds)); |
416 | ea26ce76 | Paolo Bonzini | |
417 | 06ac7d49 | Paolo Bonzini | for (i = 0; i < w->num; i++) { |
418 | 58b9630d | Stefan Weil | poll_fds[n_poll_fds + i].fd = (DWORD_PTR)w->events[i]; |
419 | ea26ce76 | Paolo Bonzini | poll_fds[n_poll_fds + i].events = G_IO_IN; |
420 | 06ac7d49 | Paolo Bonzini | } |
421 | 06ac7d49 | Paolo Bonzini | |
422 | 3239ad04 | Stefan Weil | if (poll_timeout < 0 || timeout < poll_timeout) { |
423 | 3239ad04 | Stefan Weil | poll_timeout = timeout; |
424 | 3239ad04 | Stefan Weil | } |
425 | 3239ad04 | Stefan Weil | |
426 | d3385eb4 | Paolo Bonzini | qemu_mutex_unlock_iothread(); |
427 | 5e3bc735 | Fabien Chouteau | g_poll_ret = g_poll(poll_fds, n_poll_fds + w->num, poll_timeout); |
428 | d3385eb4 | Paolo Bonzini | qemu_mutex_lock_iothread(); |
429 | 5e3bc735 | Fabien Chouteau | if (g_poll_ret > 0) { |
430 | 06ac7d49 | Paolo Bonzini | for (i = 0; i < w->num; i++) { |
431 | ea26ce76 | Paolo Bonzini | w->revents[i] = poll_fds[n_poll_fds + i].revents; |
432 | d3385eb4 | Paolo Bonzini | } |
433 | 06ac7d49 | Paolo Bonzini | for (i = 0; i < w->num; i++) { |
434 | 06ac7d49 | Paolo Bonzini | if (w->revents[i] && w->func[i]) {
|
435 | 06ac7d49 | Paolo Bonzini | w->func[i](w->opaque[i]); |
436 | d3b12f5d | Paolo Bonzini | } |
437 | d3b12f5d | Paolo Bonzini | } |
438 | d3b12f5d | Paolo Bonzini | } |
439 | d3b12f5d | Paolo Bonzini | |
440 | ea26ce76 | Paolo Bonzini | if (g_main_context_check(context, max_priority, poll_fds, n_poll_fds)) {
|
441 | ea26ce76 | Paolo Bonzini | g_main_context_dispatch(context); |
442 | ea26ce76 | Paolo Bonzini | } |
443 | ea26ce76 | Paolo Bonzini | |
444 | 5e3bc735 | Fabien Chouteau | return select_ret || g_poll_ret;
|
445 | d3b12f5d | Paolo Bonzini | } |
446 | d3b12f5d | Paolo Bonzini | #endif
|
447 | d3b12f5d | Paolo Bonzini | |
448 | d3b12f5d | Paolo Bonzini | int main_loop_wait(int nonblocking) |
449 | d3b12f5d | Paolo Bonzini | { |
450 | 7c7db755 | Stefano Stabellini | int ret;
|
451 | 7c7db755 | Stefano Stabellini | uint32_t timeout = UINT32_MAX; |
452 | d3b12f5d | Paolo Bonzini | |
453 | d3b12f5d | Paolo Bonzini | if (nonblocking) {
|
454 | d3b12f5d | Paolo Bonzini | timeout = 0;
|
455 | d3b12f5d | Paolo Bonzini | } |
456 | d3b12f5d | Paolo Bonzini | |
457 | d3b12f5d | Paolo Bonzini | /* poll any events */
|
458 | cbff4b34 | Stefan Hajnoczi | g_array_set_size(gpollfds, 0); /* reset for new iteration */ |
459 | d3b12f5d | Paolo Bonzini | /* XXX: separate device handlers from system ones */
|
460 | d3b12f5d | Paolo Bonzini | #ifdef CONFIG_SLIRP
|
461 | 7c7db755 | Stefano Stabellini | slirp_update_timeout(&timeout); |
462 | 8917c3bd | Stefan Hajnoczi | slirp_pollfds_fill(gpollfds); |
463 | d3b12f5d | Paolo Bonzini | #endif
|
464 | a3e4b4a8 | Stefan Hajnoczi | qemu_iohandler_fill(gpollfds); |
465 | 15455536 | Paolo Bonzini | ret = os_host_main_loop_wait(timeout); |
466 | a3e4b4a8 | Stefan Hajnoczi | qemu_iohandler_poll(gpollfds, ret); |
467 | d3b12f5d | Paolo Bonzini | #ifdef CONFIG_SLIRP
|
468 | 8917c3bd | Stefan Hajnoczi | slirp_pollfds_poll(gpollfds, (ret < 0));
|
469 | d3b12f5d | Paolo Bonzini | #endif
|
470 | d3b12f5d | Paolo Bonzini | |
471 | d3b12f5d | Paolo Bonzini | qemu_run_all_timers(); |
472 | d3b12f5d | Paolo Bonzini | |
473 | d3b12f5d | Paolo Bonzini | return ret;
|
474 | d3b12f5d | Paolo Bonzini | } |
475 | f627aab1 | Paolo Bonzini | |
476 | f627aab1 | Paolo Bonzini | /* Functions to operate on the main QEMU AioContext. */
|
477 | f627aab1 | Paolo Bonzini | |
478 | f627aab1 | Paolo Bonzini | QEMUBH *qemu_bh_new(QEMUBHFunc *cb, void *opaque)
|
479 | f627aab1 | Paolo Bonzini | { |
480 | f627aab1 | Paolo Bonzini | return aio_bh_new(qemu_aio_context, cb, opaque);
|
481 | f627aab1 | Paolo Bonzini | } |
482 | f627aab1 | Paolo Bonzini | |
483 | a915f4bc | Paolo Bonzini | bool qemu_aio_wait(void) |
484 | a915f4bc | Paolo Bonzini | { |
485 | 7c0628b2 | Paolo Bonzini | return aio_poll(qemu_aio_context, true); |
486 | a915f4bc | Paolo Bonzini | } |
487 | a915f4bc | Paolo Bonzini | |
488 | f42b2207 | Paolo Bonzini | #ifdef CONFIG_POSIX
|
489 | a915f4bc | Paolo Bonzini | void qemu_aio_set_fd_handler(int fd, |
490 | a915f4bc | Paolo Bonzini | IOHandler *io_read, |
491 | a915f4bc | Paolo Bonzini | IOHandler *io_write, |
492 | a915f4bc | Paolo Bonzini | AioFlushHandler *io_flush, |
493 | a915f4bc | Paolo Bonzini | void *opaque)
|
494 | a915f4bc | Paolo Bonzini | { |
495 | a915f4bc | Paolo Bonzini | aio_set_fd_handler(qemu_aio_context, fd, io_read, io_write, io_flush, |
496 | a915f4bc | Paolo Bonzini | opaque); |
497 | a915f4bc | Paolo Bonzini | } |
498 | 82cbbdc6 | Paolo Bonzini | #endif
|
499 | a915f4bc | Paolo Bonzini | |
500 | a915f4bc | Paolo Bonzini | void qemu_aio_set_event_notifier(EventNotifier *notifier,
|
501 | a915f4bc | Paolo Bonzini | EventNotifierHandler *io_read, |
502 | a915f4bc | Paolo Bonzini | AioFlushEventNotifierHandler *io_flush) |
503 | a915f4bc | Paolo Bonzini | { |
504 | 82cbbdc6 | Paolo Bonzini | aio_set_event_notifier(qemu_aio_context, notifier, io_read, io_flush); |
505 | a915f4bc | Paolo Bonzini | } |