root / qemu-timer.c @ 0727b867
History | View | Annotate | Download (18.8 kB)
1 | db1a4972 | Paolo Bonzini | /*
|
---|---|---|---|
2 | db1a4972 | Paolo Bonzini | * QEMU System Emulator
|
3 | db1a4972 | Paolo Bonzini | *
|
4 | db1a4972 | Paolo Bonzini | * Copyright (c) 2003-2008 Fabrice Bellard
|
5 | db1a4972 | Paolo Bonzini | *
|
6 | db1a4972 | Paolo Bonzini | * Permission is hereby granted, free of charge, to any person obtaining a copy
|
7 | db1a4972 | Paolo Bonzini | * of this software and associated documentation files (the "Software"), to deal
|
8 | db1a4972 | Paolo Bonzini | * in the Software without restriction, including without limitation the rights
|
9 | db1a4972 | Paolo Bonzini | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
10 | db1a4972 | Paolo Bonzini | * copies of the Software, and to permit persons to whom the Software is
|
11 | db1a4972 | Paolo Bonzini | * furnished to do so, subject to the following conditions:
|
12 | db1a4972 | Paolo Bonzini | *
|
13 | db1a4972 | Paolo Bonzini | * The above copyright notice and this permission notice shall be included in
|
14 | db1a4972 | Paolo Bonzini | * all copies or substantial portions of the Software.
|
15 | db1a4972 | Paolo Bonzini | *
|
16 | db1a4972 | Paolo Bonzini | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
17 | db1a4972 | Paolo Bonzini | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
18 | db1a4972 | Paolo Bonzini | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
19 | db1a4972 | Paolo Bonzini | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
20 | db1a4972 | Paolo Bonzini | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
21 | db1a4972 | Paolo Bonzini | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
22 | db1a4972 | Paolo Bonzini | * THE SOFTWARE.
|
23 | db1a4972 | Paolo Bonzini | */
|
24 | db1a4972 | Paolo Bonzini | |
25 | 9c17d615 | Paolo Bonzini | #include "sysemu/sysemu.h" |
26 | 83c9089e | Paolo Bonzini | #include "monitor/monitor.h" |
27 | 28ecbaee | Paolo Bonzini | #include "ui/console.h" |
28 | db1a4972 | Paolo Bonzini | |
29 | db1a4972 | Paolo Bonzini | #include "hw/hw.h" |
30 | db1a4972 | Paolo Bonzini | |
31 | 1de7afc9 | Paolo Bonzini | #include "qemu/timer.h" |
32 | 30ea8339 | Anthony Liguori | #ifdef CONFIG_POSIX
|
33 | 30ea8339 | Anthony Liguori | #include <pthread.h> |
34 | 30ea8339 | Anthony Liguori | #endif
|
35 | bff9f8bf | Stefan Weil | |
36 | db1a4972 | Paolo Bonzini | #ifdef _WIN32
|
37 | db1a4972 | Paolo Bonzini | #include <mmsystem.h> |
38 | db1a4972 | Paolo Bonzini | #endif
|
39 | db1a4972 | Paolo Bonzini | |
40 | db1a4972 | Paolo Bonzini | /***********************************************************/
|
41 | db1a4972 | Paolo Bonzini | /* timers */
|
42 | db1a4972 | Paolo Bonzini | |
43 | db1a4972 | Paolo Bonzini | #define QEMU_CLOCK_REALTIME 0 |
44 | db1a4972 | Paolo Bonzini | #define QEMU_CLOCK_VIRTUAL 1 |
45 | db1a4972 | Paolo Bonzini | #define QEMU_CLOCK_HOST 2 |
46 | db1a4972 | Paolo Bonzini | |
47 | db1a4972 | Paolo Bonzini | struct QEMUClock {
|
48 | 688eb389 | Paolo Bonzini | QEMUTimer *active_timers; |
49 | 691a0c9c | Jan Kiszka | |
50 | 691a0c9c | Jan Kiszka | NotifierList reset_notifiers; |
51 | 691a0c9c | Jan Kiszka | int64_t last; |
52 | 9a14b298 | Stefan Weil | |
53 | 9a14b298 | Stefan Weil | int type;
|
54 | 9a14b298 | Stefan Weil | bool enabled;
|
55 | db1a4972 | Paolo Bonzini | }; |
56 | db1a4972 | Paolo Bonzini | |
57 | db1a4972 | Paolo Bonzini | struct QEMUTimer {
|
58 | 4a998740 | Paolo Bonzini | int64_t expire_time; /* in nanoseconds */
|
59 | 9a14b298 | Stefan Weil | QEMUClock *clock; |
60 | db1a4972 | Paolo Bonzini | QEMUTimerCB *cb; |
61 | db1a4972 | Paolo Bonzini | void *opaque;
|
62 | 9a14b298 | Stefan Weil | QEMUTimer *next; |
63 | 9a14b298 | Stefan Weil | int scale;
|
64 | db1a4972 | Paolo Bonzini | }; |
65 | db1a4972 | Paolo Bonzini | |
66 | db1a4972 | Paolo Bonzini | struct qemu_alarm_timer {
|
67 | db1a4972 | Paolo Bonzini | char const *name; |
68 | db1a4972 | Paolo Bonzini | int (*start)(struct qemu_alarm_timer *t); |
69 | db1a4972 | Paolo Bonzini | void (*stop)(struct qemu_alarm_timer *t); |
70 | f3fc6e2e | Paolo Bonzini | void (*rearm)(struct qemu_alarm_timer *t, int64_t nearest_delta_ns); |
71 | cd0544ee | Stefan Weil | #if defined(__linux__)
|
72 | cd0544ee | Stefan Weil | timer_t timer; |
73 | 9a14b298 | Stefan Weil | int fd;
|
74 | cd0544ee | Stefan Weil | #elif defined(_WIN32)
|
75 | cd0544ee | Stefan Weil | HANDLE timer; |
76 | cd0544ee | Stefan Weil | #endif
|
77 | 5e1ec7b2 | Stefan Weil | bool expired;
|
78 | 5e1ec7b2 | Stefan Weil | bool pending;
|
79 | db1a4972 | Paolo Bonzini | }; |
80 | db1a4972 | Paolo Bonzini | |
81 | db1a4972 | Paolo Bonzini | static struct qemu_alarm_timer *alarm_timer; |
82 | db1a4972 | Paolo Bonzini | |
83 | 45c7b37f | Stefan Weil | static bool qemu_timer_expired_ns(QEMUTimer *timer_head, int64_t current_time) |
84 | 45c7b37f | Stefan Weil | { |
85 | 45c7b37f | Stefan Weil | return timer_head && (timer_head->expire_time <= current_time);
|
86 | 45c7b37f | Stefan Weil | } |
87 | 45c7b37f | Stefan Weil | |
88 | f3fc6e2e | Paolo Bonzini | static int64_t qemu_next_alarm_deadline(void) |
89 | f3fc6e2e | Paolo Bonzini | { |
90 | 4ffd16fc | Stefano Stabellini | int64_t delta = INT64_MAX; |
91 | f3fc6e2e | Paolo Bonzini | int64_t rtdelta; |
92 | f3fc6e2e | Paolo Bonzini | |
93 | 4ffd16fc | Stefano Stabellini | if (!use_icount && vm_clock->enabled && vm_clock->active_timers) {
|
94 | f3fc6e2e | Paolo Bonzini | delta = vm_clock->active_timers->expire_time - |
95 | f3fc6e2e | Paolo Bonzini | qemu_get_clock_ns(vm_clock); |
96 | f3fc6e2e | Paolo Bonzini | } |
97 | 4ffd16fc | Stefano Stabellini | if (host_clock->enabled && host_clock->active_timers) {
|
98 | f3fc6e2e | Paolo Bonzini | int64_t hdelta = host_clock->active_timers->expire_time - |
99 | f3fc6e2e | Paolo Bonzini | qemu_get_clock_ns(host_clock); |
100 | f3fc6e2e | Paolo Bonzini | if (hdelta < delta) {
|
101 | f3fc6e2e | Paolo Bonzini | delta = hdelta; |
102 | f3fc6e2e | Paolo Bonzini | } |
103 | f3fc6e2e | Paolo Bonzini | } |
104 | 4ffd16fc | Stefano Stabellini | if (rt_clock->enabled && rt_clock->active_timers) {
|
105 | f3fc6e2e | Paolo Bonzini | rtdelta = (rt_clock->active_timers->expire_time - |
106 | f3fc6e2e | Paolo Bonzini | qemu_get_clock_ns(rt_clock)); |
107 | f3fc6e2e | Paolo Bonzini | if (rtdelta < delta) {
|
108 | f3fc6e2e | Paolo Bonzini | delta = rtdelta; |
109 | f3fc6e2e | Paolo Bonzini | } |
110 | f3fc6e2e | Paolo Bonzini | } |
111 | f3fc6e2e | Paolo Bonzini | |
112 | f3fc6e2e | Paolo Bonzini | return delta;
|
113 | f3fc6e2e | Paolo Bonzini | } |
114 | f3fc6e2e | Paolo Bonzini | |
115 | db1a4972 | Paolo Bonzini | static void qemu_rearm_alarm_timer(struct qemu_alarm_timer *t) |
116 | db1a4972 | Paolo Bonzini | { |
117 | 8227421e | Stefano Stabellini | int64_t nearest_delta_ns = qemu_next_alarm_deadline(); |
118 | 8227421e | Stefano Stabellini | if (nearest_delta_ns < INT64_MAX) {
|
119 | 8227421e | Stefano Stabellini | t->rearm(t, nearest_delta_ns); |
120 | f3fc6e2e | Paolo Bonzini | } |
121 | db1a4972 | Paolo Bonzini | } |
122 | db1a4972 | Paolo Bonzini | |
123 | 9c13246a | Paolo Bonzini | /* TODO: MIN_TIMER_REARM_NS should be optimized */
|
124 | 9c13246a | Paolo Bonzini | #define MIN_TIMER_REARM_NS 250000 |
125 | db1a4972 | Paolo Bonzini | |
126 | db1a4972 | Paolo Bonzini | #ifdef _WIN32
|
127 | db1a4972 | Paolo Bonzini | |
128 | 2f9cba0c | Stefan Weil | static int mm_start_timer(struct qemu_alarm_timer *t); |
129 | 2f9cba0c | Stefan Weil | static void mm_stop_timer(struct qemu_alarm_timer *t); |
130 | f3fc6e2e | Paolo Bonzini | static void mm_rearm_timer(struct qemu_alarm_timer *t, int64_t delta); |
131 | 2f9cba0c | Stefan Weil | |
132 | db1a4972 | Paolo Bonzini | static int win32_start_timer(struct qemu_alarm_timer *t); |
133 | db1a4972 | Paolo Bonzini | static void win32_stop_timer(struct qemu_alarm_timer *t); |
134 | f3fc6e2e | Paolo Bonzini | static void win32_rearm_timer(struct qemu_alarm_timer *t, int64_t delta); |
135 | db1a4972 | Paolo Bonzini | |
136 | db1a4972 | Paolo Bonzini | #else
|
137 | db1a4972 | Paolo Bonzini | |
138 | db1a4972 | Paolo Bonzini | static int unix_start_timer(struct qemu_alarm_timer *t); |
139 | db1a4972 | Paolo Bonzini | static void unix_stop_timer(struct qemu_alarm_timer *t); |
140 | f3fc6e2e | Paolo Bonzini | static void unix_rearm_timer(struct qemu_alarm_timer *t, int64_t delta); |
141 | db1a4972 | Paolo Bonzini | |
142 | db1a4972 | Paolo Bonzini | #ifdef __linux__
|
143 | db1a4972 | Paolo Bonzini | |
144 | db1a4972 | Paolo Bonzini | static int dynticks_start_timer(struct qemu_alarm_timer *t); |
145 | db1a4972 | Paolo Bonzini | static void dynticks_stop_timer(struct qemu_alarm_timer *t); |
146 | f3fc6e2e | Paolo Bonzini | static void dynticks_rearm_timer(struct qemu_alarm_timer *t, int64_t delta); |
147 | db1a4972 | Paolo Bonzini | |
148 | db1a4972 | Paolo Bonzini | #endif /* __linux__ */ |
149 | db1a4972 | Paolo Bonzini | |
150 | db1a4972 | Paolo Bonzini | #endif /* _WIN32 */ |
151 | db1a4972 | Paolo Bonzini | |
152 | db1a4972 | Paolo Bonzini | static struct qemu_alarm_timer alarm_timers[] = { |
153 | db1a4972 | Paolo Bonzini | #ifndef _WIN32
|
154 | db1a4972 | Paolo Bonzini | #ifdef __linux__
|
155 | db1a4972 | Paolo Bonzini | {"dynticks", dynticks_start_timer,
|
156 | cd0544ee | Stefan Weil | dynticks_stop_timer, dynticks_rearm_timer}, |
157 | db1a4972 | Paolo Bonzini | #endif
|
158 | 84682834 | Paolo Bonzini | {"unix", unix_start_timer, unix_stop_timer, unix_rearm_timer},
|
159 | db1a4972 | Paolo Bonzini | #else
|
160 | cca5de73 | Paolo Bonzini | {"mmtimer", mm_start_timer, mm_stop_timer, mm_rearm_timer},
|
161 | cd0544ee | Stefan Weil | {"dynticks", win32_start_timer, win32_stop_timer, win32_rearm_timer},
|
162 | db1a4972 | Paolo Bonzini | #endif
|
163 | db1a4972 | Paolo Bonzini | {NULL, }
|
164 | db1a4972 | Paolo Bonzini | }; |
165 | db1a4972 | Paolo Bonzini | |
166 | db1a4972 | Paolo Bonzini | static void show_available_alarms(void) |
167 | db1a4972 | Paolo Bonzini | { |
168 | db1a4972 | Paolo Bonzini | int i;
|
169 | db1a4972 | Paolo Bonzini | |
170 | db1a4972 | Paolo Bonzini | printf("Available alarm timers, in order of precedence:\n");
|
171 | db1a4972 | Paolo Bonzini | for (i = 0; alarm_timers[i].name; i++) |
172 | db1a4972 | Paolo Bonzini | printf("%s\n", alarm_timers[i].name);
|
173 | db1a4972 | Paolo Bonzini | } |
174 | db1a4972 | Paolo Bonzini | |
175 | db1a4972 | Paolo Bonzini | void configure_alarms(char const *opt) |
176 | db1a4972 | Paolo Bonzini | { |
177 | db1a4972 | Paolo Bonzini | int i;
|
178 | db1a4972 | Paolo Bonzini | int cur = 0; |
179 | db1a4972 | Paolo Bonzini | int count = ARRAY_SIZE(alarm_timers) - 1; |
180 | db1a4972 | Paolo Bonzini | char *arg;
|
181 | db1a4972 | Paolo Bonzini | char *name;
|
182 | db1a4972 | Paolo Bonzini | struct qemu_alarm_timer tmp;
|
183 | db1a4972 | Paolo Bonzini | |
184 | c8057f95 | Peter Maydell | if (is_help_option(opt)) {
|
185 | db1a4972 | Paolo Bonzini | show_available_alarms(); |
186 | db1a4972 | Paolo Bonzini | exit(0);
|
187 | db1a4972 | Paolo Bonzini | } |
188 | db1a4972 | Paolo Bonzini | |
189 | 7267c094 | Anthony Liguori | arg = g_strdup(opt); |
190 | db1a4972 | Paolo Bonzini | |
191 | db1a4972 | Paolo Bonzini | /* Reorder the array */
|
192 | db1a4972 | Paolo Bonzini | name = strtok(arg, ",");
|
193 | db1a4972 | Paolo Bonzini | while (name) {
|
194 | db1a4972 | Paolo Bonzini | for (i = 0; i < count && alarm_timers[i].name; i++) { |
195 | db1a4972 | Paolo Bonzini | if (!strcmp(alarm_timers[i].name, name))
|
196 | db1a4972 | Paolo Bonzini | break;
|
197 | db1a4972 | Paolo Bonzini | } |
198 | db1a4972 | Paolo Bonzini | |
199 | db1a4972 | Paolo Bonzini | if (i == count) {
|
200 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Unknown clock %s\n", name);
|
201 | db1a4972 | Paolo Bonzini | goto next;
|
202 | db1a4972 | Paolo Bonzini | } |
203 | db1a4972 | Paolo Bonzini | |
204 | db1a4972 | Paolo Bonzini | if (i < cur)
|
205 | db1a4972 | Paolo Bonzini | /* Ignore */
|
206 | db1a4972 | Paolo Bonzini | goto next;
|
207 | db1a4972 | Paolo Bonzini | |
208 | db1a4972 | Paolo Bonzini | /* Swap */
|
209 | db1a4972 | Paolo Bonzini | tmp = alarm_timers[i]; |
210 | db1a4972 | Paolo Bonzini | alarm_timers[i] = alarm_timers[cur]; |
211 | db1a4972 | Paolo Bonzini | alarm_timers[cur] = tmp; |
212 | db1a4972 | Paolo Bonzini | |
213 | db1a4972 | Paolo Bonzini | cur++; |
214 | db1a4972 | Paolo Bonzini | next:
|
215 | db1a4972 | Paolo Bonzini | name = strtok(NULL, ","); |
216 | db1a4972 | Paolo Bonzini | } |
217 | db1a4972 | Paolo Bonzini | |
218 | 7267c094 | Anthony Liguori | g_free(arg); |
219 | db1a4972 | Paolo Bonzini | |
220 | db1a4972 | Paolo Bonzini | if (cur) {
|
221 | db1a4972 | Paolo Bonzini | /* Disable remaining timers */
|
222 | db1a4972 | Paolo Bonzini | for (i = cur; i < count; i++)
|
223 | db1a4972 | Paolo Bonzini | alarm_timers[i].name = NULL;
|
224 | db1a4972 | Paolo Bonzini | } else {
|
225 | db1a4972 | Paolo Bonzini | show_available_alarms(); |
226 | db1a4972 | Paolo Bonzini | exit(1);
|
227 | db1a4972 | Paolo Bonzini | } |
228 | db1a4972 | Paolo Bonzini | } |
229 | db1a4972 | Paolo Bonzini | |
230 | db1a4972 | Paolo Bonzini | QEMUClock *rt_clock; |
231 | db1a4972 | Paolo Bonzini | QEMUClock *vm_clock; |
232 | db1a4972 | Paolo Bonzini | QEMUClock *host_clock; |
233 | db1a4972 | Paolo Bonzini | |
234 | db1a4972 | Paolo Bonzini | static QEMUClock *qemu_new_clock(int type) |
235 | db1a4972 | Paolo Bonzini | { |
236 | db1a4972 | Paolo Bonzini | QEMUClock *clock; |
237 | 691a0c9c | Jan Kiszka | |
238 | 7267c094 | Anthony Liguori | clock = g_malloc0(sizeof(QEMUClock));
|
239 | db1a4972 | Paolo Bonzini | clock->type = type; |
240 | 5e1ec7b2 | Stefan Weil | clock->enabled = true;
|
241 | 2ff68d07 | Paolo Bonzini | clock->last = INT64_MIN; |
242 | 691a0c9c | Jan Kiszka | notifier_list_init(&clock->reset_notifiers); |
243 | db1a4972 | Paolo Bonzini | return clock;
|
244 | db1a4972 | Paolo Bonzini | } |
245 | db1a4972 | Paolo Bonzini | |
246 | 5e1ec7b2 | Stefan Weil | void qemu_clock_enable(QEMUClock *clock, bool enabled) |
247 | db1a4972 | Paolo Bonzini | { |
248 | fbdc14eb | Paolo Bonzini | bool old = clock->enabled;
|
249 | db1a4972 | Paolo Bonzini | clock->enabled = enabled; |
250 | fbdc14eb | Paolo Bonzini | if (enabled && !old) {
|
251 | fbdc14eb | Paolo Bonzini | qemu_rearm_alarm_timer(alarm_timer); |
252 | fbdc14eb | Paolo Bonzini | } |
253 | db1a4972 | Paolo Bonzini | } |
254 | db1a4972 | Paolo Bonzini | |
255 | dc2dfcf0 | Paolo Bonzini | int64_t qemu_clock_has_timers(QEMUClock *clock) |
256 | dc2dfcf0 | Paolo Bonzini | { |
257 | dc2dfcf0 | Paolo Bonzini | return !!clock->active_timers;
|
258 | dc2dfcf0 | Paolo Bonzini | } |
259 | dc2dfcf0 | Paolo Bonzini | |
260 | dc2dfcf0 | Paolo Bonzini | int64_t qemu_clock_expired(QEMUClock *clock) |
261 | dc2dfcf0 | Paolo Bonzini | { |
262 | dc2dfcf0 | Paolo Bonzini | return (clock->active_timers &&
|
263 | dc2dfcf0 | Paolo Bonzini | clock->active_timers->expire_time < qemu_get_clock_ns(clock)); |
264 | dc2dfcf0 | Paolo Bonzini | } |
265 | dc2dfcf0 | Paolo Bonzini | |
266 | dc2dfcf0 | Paolo Bonzini | int64_t qemu_clock_deadline(QEMUClock *clock) |
267 | dc2dfcf0 | Paolo Bonzini | { |
268 | dc2dfcf0 | Paolo Bonzini | /* To avoid problems with overflow limit this to 2^32. */
|
269 | dc2dfcf0 | Paolo Bonzini | int64_t delta = INT32_MAX; |
270 | dc2dfcf0 | Paolo Bonzini | |
271 | dc2dfcf0 | Paolo Bonzini | if (clock->active_timers) {
|
272 | dc2dfcf0 | Paolo Bonzini | delta = clock->active_timers->expire_time - qemu_get_clock_ns(clock); |
273 | dc2dfcf0 | Paolo Bonzini | } |
274 | dc2dfcf0 | Paolo Bonzini | if (delta < 0) { |
275 | dc2dfcf0 | Paolo Bonzini | delta = 0;
|
276 | dc2dfcf0 | Paolo Bonzini | } |
277 | dc2dfcf0 | Paolo Bonzini | return delta;
|
278 | dc2dfcf0 | Paolo Bonzini | } |
279 | dc2dfcf0 | Paolo Bonzini | |
280 | 4a998740 | Paolo Bonzini | QEMUTimer *qemu_new_timer(QEMUClock *clock, int scale,
|
281 | 4a998740 | Paolo Bonzini | QEMUTimerCB *cb, void *opaque)
|
282 | db1a4972 | Paolo Bonzini | { |
283 | db1a4972 | Paolo Bonzini | QEMUTimer *ts; |
284 | db1a4972 | Paolo Bonzini | |
285 | 7267c094 | Anthony Liguori | ts = g_malloc0(sizeof(QEMUTimer));
|
286 | db1a4972 | Paolo Bonzini | ts->clock = clock; |
287 | db1a4972 | Paolo Bonzini | ts->cb = cb; |
288 | db1a4972 | Paolo Bonzini | ts->opaque = opaque; |
289 | 4a998740 | Paolo Bonzini | ts->scale = scale; |
290 | db1a4972 | Paolo Bonzini | return ts;
|
291 | db1a4972 | Paolo Bonzini | } |
292 | db1a4972 | Paolo Bonzini | |
293 | db1a4972 | Paolo Bonzini | void qemu_free_timer(QEMUTimer *ts)
|
294 | db1a4972 | Paolo Bonzini | { |
295 | 7267c094 | Anthony Liguori | g_free(ts); |
296 | db1a4972 | Paolo Bonzini | } |
297 | db1a4972 | Paolo Bonzini | |
298 | db1a4972 | Paolo Bonzini | /* stop a timer, but do not dealloc it */
|
299 | db1a4972 | Paolo Bonzini | void qemu_del_timer(QEMUTimer *ts)
|
300 | db1a4972 | Paolo Bonzini | { |
301 | db1a4972 | Paolo Bonzini | QEMUTimer **pt, *t; |
302 | db1a4972 | Paolo Bonzini | |
303 | db1a4972 | Paolo Bonzini | /* NOTE: this code must be signal safe because
|
304 | db1a4972 | Paolo Bonzini | qemu_timer_expired() can be called from a signal. */
|
305 | 688eb389 | Paolo Bonzini | pt = &ts->clock->active_timers; |
306 | db1a4972 | Paolo Bonzini | for(;;) {
|
307 | db1a4972 | Paolo Bonzini | t = *pt; |
308 | db1a4972 | Paolo Bonzini | if (!t)
|
309 | db1a4972 | Paolo Bonzini | break;
|
310 | db1a4972 | Paolo Bonzini | if (t == ts) {
|
311 | db1a4972 | Paolo Bonzini | *pt = t->next; |
312 | db1a4972 | Paolo Bonzini | break;
|
313 | db1a4972 | Paolo Bonzini | } |
314 | db1a4972 | Paolo Bonzini | pt = &t->next; |
315 | db1a4972 | Paolo Bonzini | } |
316 | db1a4972 | Paolo Bonzini | } |
317 | db1a4972 | Paolo Bonzini | |
318 | db1a4972 | Paolo Bonzini | /* modify the current timer so that it will be fired when current_time
|
319 | db1a4972 | Paolo Bonzini | >= expire_time. The corresponding callback will be called. */
|
320 | 2ff68d07 | Paolo Bonzini | void qemu_mod_timer_ns(QEMUTimer *ts, int64_t expire_time)
|
321 | db1a4972 | Paolo Bonzini | { |
322 | db1a4972 | Paolo Bonzini | QEMUTimer **pt, *t; |
323 | db1a4972 | Paolo Bonzini | |
324 | db1a4972 | Paolo Bonzini | qemu_del_timer(ts); |
325 | db1a4972 | Paolo Bonzini | |
326 | db1a4972 | Paolo Bonzini | /* add the timer in the sorted list */
|
327 | db1a4972 | Paolo Bonzini | /* NOTE: this code must be signal safe because
|
328 | db1a4972 | Paolo Bonzini | qemu_timer_expired() can be called from a signal. */
|
329 | 688eb389 | Paolo Bonzini | pt = &ts->clock->active_timers; |
330 | db1a4972 | Paolo Bonzini | for(;;) {
|
331 | db1a4972 | Paolo Bonzini | t = *pt; |
332 | 45c7b37f | Stefan Weil | if (!qemu_timer_expired_ns(t, expire_time)) {
|
333 | db1a4972 | Paolo Bonzini | break;
|
334 | 45c7b37f | Stefan Weil | } |
335 | db1a4972 | Paolo Bonzini | pt = &t->next; |
336 | db1a4972 | Paolo Bonzini | } |
337 | db1a4972 | Paolo Bonzini | ts->expire_time = expire_time; |
338 | db1a4972 | Paolo Bonzini | ts->next = *pt; |
339 | db1a4972 | Paolo Bonzini | *pt = ts; |
340 | db1a4972 | Paolo Bonzini | |
341 | db1a4972 | Paolo Bonzini | /* Rearm if necessary */
|
342 | 688eb389 | Paolo Bonzini | if (pt == &ts->clock->active_timers) {
|
343 | db1a4972 | Paolo Bonzini | if (!alarm_timer->pending) {
|
344 | db1a4972 | Paolo Bonzini | qemu_rearm_alarm_timer(alarm_timer); |
345 | db1a4972 | Paolo Bonzini | } |
346 | db1a4972 | Paolo Bonzini | /* Interrupt execution to force deadline recalculation. */
|
347 | ab33fcda | Paolo Bonzini | qemu_clock_warp(ts->clock); |
348 | ab33fcda | Paolo Bonzini | if (use_icount) {
|
349 | db1a4972 | Paolo Bonzini | qemu_notify_event(); |
350 | ab33fcda | Paolo Bonzini | } |
351 | db1a4972 | Paolo Bonzini | } |
352 | db1a4972 | Paolo Bonzini | } |
353 | db1a4972 | Paolo Bonzini | |
354 | 4a998740 | Paolo Bonzini | void qemu_mod_timer(QEMUTimer *ts, int64_t expire_time)
|
355 | 4a998740 | Paolo Bonzini | { |
356 | 4a998740 | Paolo Bonzini | qemu_mod_timer_ns(ts, expire_time * ts->scale); |
357 | 4a998740 | Paolo Bonzini | } |
358 | 4a998740 | Paolo Bonzini | |
359 | 5e1ec7b2 | Stefan Weil | bool qemu_timer_pending(QEMUTimer *ts)
|
360 | db1a4972 | Paolo Bonzini | { |
361 | db1a4972 | Paolo Bonzini | QEMUTimer *t; |
362 | 688eb389 | Paolo Bonzini | for (t = ts->clock->active_timers; t != NULL; t = t->next) { |
363 | 5e1ec7b2 | Stefan Weil | if (t == ts) {
|
364 | 5e1ec7b2 | Stefan Weil | return true; |
365 | 5e1ec7b2 | Stefan Weil | } |
366 | db1a4972 | Paolo Bonzini | } |
367 | 5e1ec7b2 | Stefan Weil | return false; |
368 | db1a4972 | Paolo Bonzini | } |
369 | db1a4972 | Paolo Bonzini | |
370 | 5e1ec7b2 | Stefan Weil | bool qemu_timer_expired(QEMUTimer *timer_head, int64_t current_time)
|
371 | db1a4972 | Paolo Bonzini | { |
372 | 45c7b37f | Stefan Weil | return qemu_timer_expired_ns(timer_head, current_time * timer_head->scale);
|
373 | db1a4972 | Paolo Bonzini | } |
374 | db1a4972 | Paolo Bonzini | |
375 | 8156be56 | Paolo Bonzini | void qemu_run_timers(QEMUClock *clock)
|
376 | db1a4972 | Paolo Bonzini | { |
377 | 144b97c2 | Paolo Bonzini | QEMUTimer *ts; |
378 | db1a4972 | Paolo Bonzini | int64_t current_time; |
379 | db1a4972 | Paolo Bonzini | |
380 | db1a4972 | Paolo Bonzini | if (!clock->enabled)
|
381 | db1a4972 | Paolo Bonzini | return;
|
382 | db1a4972 | Paolo Bonzini | |
383 | 4a998740 | Paolo Bonzini | current_time = qemu_get_clock_ns(clock); |
384 | db1a4972 | Paolo Bonzini | for(;;) {
|
385 | 144b97c2 | Paolo Bonzini | ts = clock->active_timers; |
386 | 45c7b37f | Stefan Weil | if (!qemu_timer_expired_ns(ts, current_time)) {
|
387 | db1a4972 | Paolo Bonzini | break;
|
388 | 45c7b37f | Stefan Weil | } |
389 | db1a4972 | Paolo Bonzini | /* remove timer from the list before calling the callback */
|
390 | 144b97c2 | Paolo Bonzini | clock->active_timers = ts->next; |
391 | db1a4972 | Paolo Bonzini | ts->next = NULL;
|
392 | db1a4972 | Paolo Bonzini | |
393 | db1a4972 | Paolo Bonzini | /* run the callback (the timer list can be modified) */
|
394 | db1a4972 | Paolo Bonzini | ts->cb(ts->opaque); |
395 | db1a4972 | Paolo Bonzini | } |
396 | db1a4972 | Paolo Bonzini | } |
397 | db1a4972 | Paolo Bonzini | |
398 | db1a4972 | Paolo Bonzini | int64_t qemu_get_clock_ns(QEMUClock *clock) |
399 | db1a4972 | Paolo Bonzini | { |
400 | 691a0c9c | Jan Kiszka | int64_t now, last; |
401 | 691a0c9c | Jan Kiszka | |
402 | db1a4972 | Paolo Bonzini | switch(clock->type) {
|
403 | db1a4972 | Paolo Bonzini | case QEMU_CLOCK_REALTIME:
|
404 | db1a4972 | Paolo Bonzini | return get_clock();
|
405 | db1a4972 | Paolo Bonzini | default:
|
406 | db1a4972 | Paolo Bonzini | case QEMU_CLOCK_VIRTUAL:
|
407 | db1a4972 | Paolo Bonzini | if (use_icount) {
|
408 | db1a4972 | Paolo Bonzini | return cpu_get_icount();
|
409 | db1a4972 | Paolo Bonzini | } else {
|
410 | db1a4972 | Paolo Bonzini | return cpu_get_clock();
|
411 | db1a4972 | Paolo Bonzini | } |
412 | db1a4972 | Paolo Bonzini | case QEMU_CLOCK_HOST:
|
413 | 691a0c9c | Jan Kiszka | now = get_clock_realtime(); |
414 | 691a0c9c | Jan Kiszka | last = clock->last; |
415 | 691a0c9c | Jan Kiszka | clock->last = now; |
416 | 691a0c9c | Jan Kiszka | if (now < last) {
|
417 | 691a0c9c | Jan Kiszka | notifier_list_notify(&clock->reset_notifiers, &now); |
418 | 691a0c9c | Jan Kiszka | } |
419 | 691a0c9c | Jan Kiszka | return now;
|
420 | db1a4972 | Paolo Bonzini | } |
421 | db1a4972 | Paolo Bonzini | } |
422 | db1a4972 | Paolo Bonzini | |
423 | 691a0c9c | Jan Kiszka | void qemu_register_clock_reset_notifier(QEMUClock *clock, Notifier *notifier)
|
424 | 691a0c9c | Jan Kiszka | { |
425 | 691a0c9c | Jan Kiszka | notifier_list_add(&clock->reset_notifiers, notifier); |
426 | 691a0c9c | Jan Kiszka | } |
427 | 691a0c9c | Jan Kiszka | |
428 | 691a0c9c | Jan Kiszka | void qemu_unregister_clock_reset_notifier(QEMUClock *clock, Notifier *notifier)
|
429 | 691a0c9c | Jan Kiszka | { |
430 | 31552529 | Paolo Bonzini | notifier_remove(notifier); |
431 | 691a0c9c | Jan Kiszka | } |
432 | 691a0c9c | Jan Kiszka | |
433 | db1a4972 | Paolo Bonzini | void init_clocks(void) |
434 | db1a4972 | Paolo Bonzini | { |
435 | 744ca8e3 | Paolo Bonzini | if (!rt_clock) {
|
436 | 744ca8e3 | Paolo Bonzini | rt_clock = qemu_new_clock(QEMU_CLOCK_REALTIME); |
437 | 744ca8e3 | Paolo Bonzini | vm_clock = qemu_new_clock(QEMU_CLOCK_VIRTUAL); |
438 | 744ca8e3 | Paolo Bonzini | host_clock = qemu_new_clock(QEMU_CLOCK_HOST); |
439 | 744ca8e3 | Paolo Bonzini | } |
440 | db1a4972 | Paolo Bonzini | } |
441 | db1a4972 | Paolo Bonzini | |
442 | 2ff68d07 | Paolo Bonzini | uint64_t qemu_timer_expire_time_ns(QEMUTimer *ts) |
443 | db1a4972 | Paolo Bonzini | { |
444 | 2ff68d07 | Paolo Bonzini | return qemu_timer_pending(ts) ? ts->expire_time : -1; |
445 | db1a4972 | Paolo Bonzini | } |
446 | db1a4972 | Paolo Bonzini | |
447 | db1a4972 | Paolo Bonzini | void qemu_run_all_timers(void) |
448 | db1a4972 | Paolo Bonzini | { |
449 | 5e1ec7b2 | Stefan Weil | alarm_timer->pending = false;
|
450 | ca5a2a4b | Paolo Bonzini | |
451 | 158fd3ce | Peter Portante | /* vm time timers */
|
452 | 158fd3ce | Peter Portante | qemu_run_timers(vm_clock); |
453 | 158fd3ce | Peter Portante | qemu_run_timers(rt_clock); |
454 | 158fd3ce | Peter Portante | qemu_run_timers(host_clock); |
455 | 158fd3ce | Peter Portante | |
456 | db1a4972 | Paolo Bonzini | /* rearm timer, if not periodic */
|
457 | db1a4972 | Paolo Bonzini | if (alarm_timer->expired) {
|
458 | 5e1ec7b2 | Stefan Weil | alarm_timer->expired = false;
|
459 | db1a4972 | Paolo Bonzini | qemu_rearm_alarm_timer(alarm_timer); |
460 | db1a4972 | Paolo Bonzini | } |
461 | db1a4972 | Paolo Bonzini | } |
462 | db1a4972 | Paolo Bonzini | |
463 | db1a4972 | Paolo Bonzini | #ifdef _WIN32
|
464 | 68c23e55 | Paolo Bonzini | static void CALLBACK host_alarm_handler(PVOID lpParam, BOOLEAN unused) |
465 | db1a4972 | Paolo Bonzini | #else
|
466 | db1a4972 | Paolo Bonzini | static void host_alarm_handler(int host_signum) |
467 | db1a4972 | Paolo Bonzini | #endif
|
468 | db1a4972 | Paolo Bonzini | { |
469 | db1a4972 | Paolo Bonzini | struct qemu_alarm_timer *t = alarm_timer;
|
470 | db1a4972 | Paolo Bonzini | if (!t)
|
471 | db1a4972 | Paolo Bonzini | return;
|
472 | db1a4972 | Paolo Bonzini | |
473 | 8205199d | Stefan Weil | t->expired = true;
|
474 | 8205199d | Stefan Weil | t->pending = true;
|
475 | 8205199d | Stefan Weil | qemu_notify_event(); |
476 | db1a4972 | Paolo Bonzini | } |
477 | db1a4972 | Paolo Bonzini | |
478 | 4c3d45eb | Paolo Bonzini | #if defined(__linux__)
|
479 | 4c3d45eb | Paolo Bonzini | |
480 | 1de7afc9 | Paolo Bonzini | #include "qemu/compatfd.h" |
481 | d25f89c9 | Jan Kiszka | |
482 | db1a4972 | Paolo Bonzini | static int dynticks_start_timer(struct qemu_alarm_timer *t) |
483 | db1a4972 | Paolo Bonzini | { |
484 | db1a4972 | Paolo Bonzini | struct sigevent ev;
|
485 | db1a4972 | Paolo Bonzini | timer_t host_timer; |
486 | db1a4972 | Paolo Bonzini | struct sigaction act;
|
487 | db1a4972 | Paolo Bonzini | |
488 | db1a4972 | Paolo Bonzini | sigfillset(&act.sa_mask); |
489 | db1a4972 | Paolo Bonzini | act.sa_flags = 0;
|
490 | db1a4972 | Paolo Bonzini | act.sa_handler = host_alarm_handler; |
491 | db1a4972 | Paolo Bonzini | |
492 | db1a4972 | Paolo Bonzini | sigaction(SIGALRM, &act, NULL);
|
493 | db1a4972 | Paolo Bonzini | |
494 | db1a4972 | Paolo Bonzini | /*
|
495 | db1a4972 | Paolo Bonzini | * Initialize ev struct to 0 to avoid valgrind complaining
|
496 | db1a4972 | Paolo Bonzini | * about uninitialized data in timer_create call
|
497 | db1a4972 | Paolo Bonzini | */
|
498 | db1a4972 | Paolo Bonzini | memset(&ev, 0, sizeof(ev)); |
499 | db1a4972 | Paolo Bonzini | ev.sigev_value.sival_int = 0;
|
500 | db1a4972 | Paolo Bonzini | ev.sigev_notify = SIGEV_SIGNAL; |
501 | 1e9737da | Richard Henderson | #ifdef CONFIG_SIGEV_THREAD_ID
|
502 | d25f89c9 | Jan Kiszka | if (qemu_signalfd_available()) {
|
503 | d25f89c9 | Jan Kiszka | ev.sigev_notify = SIGEV_THREAD_ID; |
504 | d25f89c9 | Jan Kiszka | ev._sigev_un._tid = qemu_get_thread_id(); |
505 | d25f89c9 | Jan Kiszka | } |
506 | 1e9737da | Richard Henderson | #endif /* CONFIG_SIGEV_THREAD_ID */ |
507 | db1a4972 | Paolo Bonzini | ev.sigev_signo = SIGALRM; |
508 | db1a4972 | Paolo Bonzini | |
509 | db1a4972 | Paolo Bonzini | if (timer_create(CLOCK_REALTIME, &ev, &host_timer)) {
|
510 | db1a4972 | Paolo Bonzini | perror("timer_create");
|
511 | db1a4972 | Paolo Bonzini | return -1; |
512 | db1a4972 | Paolo Bonzini | } |
513 | db1a4972 | Paolo Bonzini | |
514 | cd0544ee | Stefan Weil | t->timer = host_timer; |
515 | db1a4972 | Paolo Bonzini | |
516 | db1a4972 | Paolo Bonzini | return 0; |
517 | db1a4972 | Paolo Bonzini | } |
518 | db1a4972 | Paolo Bonzini | |
519 | db1a4972 | Paolo Bonzini | static void dynticks_stop_timer(struct qemu_alarm_timer *t) |
520 | db1a4972 | Paolo Bonzini | { |
521 | cd0544ee | Stefan Weil | timer_t host_timer = t->timer; |
522 | db1a4972 | Paolo Bonzini | |
523 | db1a4972 | Paolo Bonzini | timer_delete(host_timer); |
524 | db1a4972 | Paolo Bonzini | } |
525 | db1a4972 | Paolo Bonzini | |
526 | f3fc6e2e | Paolo Bonzini | static void dynticks_rearm_timer(struct qemu_alarm_timer *t, |
527 | f3fc6e2e | Paolo Bonzini | int64_t nearest_delta_ns) |
528 | db1a4972 | Paolo Bonzini | { |
529 | cd0544ee | Stefan Weil | timer_t host_timer = t->timer; |
530 | db1a4972 | Paolo Bonzini | struct itimerspec timeout;
|
531 | 9c13246a | Paolo Bonzini | int64_t current_ns; |
532 | db1a4972 | Paolo Bonzini | |
533 | 4c3d45eb | Paolo Bonzini | if (nearest_delta_ns < MIN_TIMER_REARM_NS)
|
534 | 4c3d45eb | Paolo Bonzini | nearest_delta_ns = MIN_TIMER_REARM_NS; |
535 | db1a4972 | Paolo Bonzini | |
536 | db1a4972 | Paolo Bonzini | /* check whether a timer is already running */
|
537 | db1a4972 | Paolo Bonzini | if (timer_gettime(host_timer, &timeout)) {
|
538 | db1a4972 | Paolo Bonzini | perror("gettime");
|
539 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Internal timer error: aborting\n");
|
540 | db1a4972 | Paolo Bonzini | exit(1);
|
541 | db1a4972 | Paolo Bonzini | } |
542 | 9c13246a | Paolo Bonzini | current_ns = timeout.it_value.tv_sec * 1000000000LL + timeout.it_value.tv_nsec;
|
543 | 9c13246a | Paolo Bonzini | if (current_ns && current_ns <= nearest_delta_ns)
|
544 | db1a4972 | Paolo Bonzini | return;
|
545 | db1a4972 | Paolo Bonzini | |
546 | db1a4972 | Paolo Bonzini | timeout.it_interval.tv_sec = 0;
|
547 | db1a4972 | Paolo Bonzini | timeout.it_interval.tv_nsec = 0; /* 0 for one-shot timer */ |
548 | 9c13246a | Paolo Bonzini | timeout.it_value.tv_sec = nearest_delta_ns / 1000000000;
|
549 | 9c13246a | Paolo Bonzini | timeout.it_value.tv_nsec = nearest_delta_ns % 1000000000;
|
550 | db1a4972 | Paolo Bonzini | if (timer_settime(host_timer, 0 /* RELATIVE */, &timeout, NULL)) { |
551 | db1a4972 | Paolo Bonzini | perror("settime");
|
552 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Internal timer error: aborting\n");
|
553 | db1a4972 | Paolo Bonzini | exit(1);
|
554 | db1a4972 | Paolo Bonzini | } |
555 | db1a4972 | Paolo Bonzini | } |
556 | db1a4972 | Paolo Bonzini | |
557 | db1a4972 | Paolo Bonzini | #endif /* defined(__linux__) */ |
558 | db1a4972 | Paolo Bonzini | |
559 | f26e5a54 | Stefan Weil | #if !defined(_WIN32)
|
560 | f26e5a54 | Stefan Weil | |
561 | db1a4972 | Paolo Bonzini | static int unix_start_timer(struct qemu_alarm_timer *t) |
562 | db1a4972 | Paolo Bonzini | { |
563 | db1a4972 | Paolo Bonzini | struct sigaction act;
|
564 | db1a4972 | Paolo Bonzini | |
565 | db1a4972 | Paolo Bonzini | /* timer signal */
|
566 | db1a4972 | Paolo Bonzini | sigfillset(&act.sa_mask); |
567 | db1a4972 | Paolo Bonzini | act.sa_flags = 0;
|
568 | db1a4972 | Paolo Bonzini | act.sa_handler = host_alarm_handler; |
569 | db1a4972 | Paolo Bonzini | |
570 | db1a4972 | Paolo Bonzini | sigaction(SIGALRM, &act, NULL);
|
571 | 84682834 | Paolo Bonzini | return 0; |
572 | 84682834 | Paolo Bonzini | } |
573 | db1a4972 | Paolo Bonzini | |
574 | f3fc6e2e | Paolo Bonzini | static void unix_rearm_timer(struct qemu_alarm_timer *t, |
575 | f3fc6e2e | Paolo Bonzini | int64_t nearest_delta_ns) |
576 | 84682834 | Paolo Bonzini | { |
577 | 84682834 | Paolo Bonzini | struct itimerval itv;
|
578 | 84682834 | Paolo Bonzini | int err;
|
579 | db1a4972 | Paolo Bonzini | |
580 | 84682834 | Paolo Bonzini | if (nearest_delta_ns < MIN_TIMER_REARM_NS)
|
581 | 84682834 | Paolo Bonzini | nearest_delta_ns = MIN_TIMER_REARM_NS; |
582 | 84682834 | Paolo Bonzini | |
583 | 84682834 | Paolo Bonzini | itv.it_interval.tv_sec = 0;
|
584 | 84682834 | Paolo Bonzini | itv.it_interval.tv_usec = 0; /* 0 for one-shot timer */ |
585 | 84682834 | Paolo Bonzini | itv.it_value.tv_sec = nearest_delta_ns / 1000000000;
|
586 | 84682834 | Paolo Bonzini | itv.it_value.tv_usec = (nearest_delta_ns % 1000000000) / 1000; |
587 | 84682834 | Paolo Bonzini | err = setitimer(ITIMER_REAL, &itv, NULL);
|
588 | 84682834 | Paolo Bonzini | if (err) {
|
589 | 84682834 | Paolo Bonzini | perror("setitimer");
|
590 | 84682834 | Paolo Bonzini | fprintf(stderr, "Internal timer error: aborting\n");
|
591 | 84682834 | Paolo Bonzini | exit(1);
|
592 | 84682834 | Paolo Bonzini | } |
593 | db1a4972 | Paolo Bonzini | } |
594 | db1a4972 | Paolo Bonzini | |
595 | db1a4972 | Paolo Bonzini | static void unix_stop_timer(struct qemu_alarm_timer *t) |
596 | db1a4972 | Paolo Bonzini | { |
597 | db1a4972 | Paolo Bonzini | struct itimerval itv;
|
598 | db1a4972 | Paolo Bonzini | |
599 | db1a4972 | Paolo Bonzini | memset(&itv, 0, sizeof(itv)); |
600 | db1a4972 | Paolo Bonzini | setitimer(ITIMER_REAL, &itv, NULL);
|
601 | db1a4972 | Paolo Bonzini | } |
602 | db1a4972 | Paolo Bonzini | |
603 | db1a4972 | Paolo Bonzini | #endif /* !defined(_WIN32) */ |
604 | db1a4972 | Paolo Bonzini | |
605 | db1a4972 | Paolo Bonzini | |
606 | db1a4972 | Paolo Bonzini | #ifdef _WIN32
|
607 | db1a4972 | Paolo Bonzini | |
608 | 2f9cba0c | Stefan Weil | static MMRESULT mm_timer;
|
609 | 40f08e87 | Stefan Weil | static TIMECAPS mm_tc;
|
610 | 2f9cba0c | Stefan Weil | |
611 | 2f9cba0c | Stefan Weil | static void CALLBACK mm_alarm_handler(UINT uTimerID, UINT uMsg, |
612 | 2f9cba0c | Stefan Weil | DWORD_PTR dwUser, DWORD_PTR dw1, |
613 | 2f9cba0c | Stefan Weil | DWORD_PTR dw2) |
614 | 2f9cba0c | Stefan Weil | { |
615 | 2f9cba0c | Stefan Weil | struct qemu_alarm_timer *t = alarm_timer;
|
616 | 2f9cba0c | Stefan Weil | if (!t) {
|
617 | 2f9cba0c | Stefan Weil | return;
|
618 | 2f9cba0c | Stefan Weil | } |
619 | 8205199d | Stefan Weil | t->expired = true;
|
620 | 8205199d | Stefan Weil | t->pending = true;
|
621 | 8205199d | Stefan Weil | qemu_notify_event(); |
622 | 2f9cba0c | Stefan Weil | } |
623 | 2f9cba0c | Stefan Weil | |
624 | 2f9cba0c | Stefan Weil | static int mm_start_timer(struct qemu_alarm_timer *t) |
625 | 2f9cba0c | Stefan Weil | { |
626 | 40f08e87 | Stefan Weil | timeGetDevCaps(&mm_tc, sizeof(mm_tc));
|
627 | 2f9cba0c | Stefan Weil | return 0; |
628 | 2f9cba0c | Stefan Weil | } |
629 | 2f9cba0c | Stefan Weil | |
630 | 2f9cba0c | Stefan Weil | static void mm_stop_timer(struct qemu_alarm_timer *t) |
631 | 2f9cba0c | Stefan Weil | { |
632 | 0727b867 | Paolo Bonzini | if (mm_timer) {
|
633 | 0727b867 | Paolo Bonzini | timeKillEvent(mm_timer); |
634 | 0727b867 | Paolo Bonzini | } |
635 | 2f9cba0c | Stefan Weil | } |
636 | 2f9cba0c | Stefan Weil | |
637 | f3fc6e2e | Paolo Bonzini | static void mm_rearm_timer(struct qemu_alarm_timer *t, int64_t delta) |
638 | 2f9cba0c | Stefan Weil | { |
639 | 5bfb723f | Stefano Stabellini | int64_t nearest_delta_ms = delta / 1000000;
|
640 | 40f08e87 | Stefan Weil | if (nearest_delta_ms < mm_tc.wPeriodMin) {
|
641 | 40f08e87 | Stefan Weil | nearest_delta_ms = mm_tc.wPeriodMin; |
642 | 40f08e87 | Stefan Weil | } else if (nearest_delta_ms > mm_tc.wPeriodMax) { |
643 | 40f08e87 | Stefan Weil | nearest_delta_ms = mm_tc.wPeriodMax; |
644 | 5bfb723f | Stefano Stabellini | } |
645 | f3fc6e2e | Paolo Bonzini | |
646 | 0727b867 | Paolo Bonzini | if (mm_timer) {
|
647 | 0727b867 | Paolo Bonzini | timeKillEvent(mm_timer); |
648 | 0727b867 | Paolo Bonzini | } |
649 | 40f08e87 | Stefan Weil | mm_timer = timeSetEvent((UINT)nearest_delta_ms, |
650 | 40f08e87 | Stefan Weil | mm_tc.wPeriodMin, |
651 | 2f9cba0c | Stefan Weil | mm_alarm_handler, |
652 | 2f9cba0c | Stefan Weil | (DWORD_PTR)t, |
653 | 2f9cba0c | Stefan Weil | TIME_ONESHOT | TIME_CALLBACK_FUNCTION); |
654 | 2f9cba0c | Stefan Weil | |
655 | 2f9cba0c | Stefan Weil | if (!mm_timer) {
|
656 | 52ef651f | Stefan Weil | fprintf(stderr, "Failed to re-arm win32 alarm timer\n");
|
657 | 40f08e87 | Stefan Weil | timeEndPeriod(mm_tc.wPeriodMin); |
658 | 2f9cba0c | Stefan Weil | exit(1);
|
659 | 2f9cba0c | Stefan Weil | } |
660 | 2f9cba0c | Stefan Weil | } |
661 | 2f9cba0c | Stefan Weil | |
662 | db1a4972 | Paolo Bonzini | static int win32_start_timer(struct qemu_alarm_timer *t) |
663 | db1a4972 | Paolo Bonzini | { |
664 | 68c23e55 | Paolo Bonzini | HANDLE hTimer; |
665 | 68c23e55 | Paolo Bonzini | BOOLEAN success; |
666 | 68c23e55 | Paolo Bonzini | |
667 | 68c23e55 | Paolo Bonzini | /* If you call ChangeTimerQueueTimer on a one-shot timer (its period
|
668 | 68c23e55 | Paolo Bonzini | is zero) that has already expired, the timer is not updated. Since
|
669 | 68c23e55 | Paolo Bonzini | creating a new timer is relatively expensive, set a bogus one-hour
|
670 | 68c23e55 | Paolo Bonzini | interval in the dynticks case. */
|
671 | 68c23e55 | Paolo Bonzini | success = CreateTimerQueueTimer(&hTimer, |
672 | 68c23e55 | Paolo Bonzini | NULL,
|
673 | 68c23e55 | Paolo Bonzini | host_alarm_handler, |
674 | 68c23e55 | Paolo Bonzini | t, |
675 | 68c23e55 | Paolo Bonzini | 1,
|
676 | 8205199d | Stefan Weil | 3600000,
|
677 | 68c23e55 | Paolo Bonzini | WT_EXECUTEINTIMERTHREAD); |
678 | 68c23e55 | Paolo Bonzini | |
679 | 68c23e55 | Paolo Bonzini | if (!success) {
|
680 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Failed to initialize win32 alarm timer: %ld\n",
|
681 | db1a4972 | Paolo Bonzini | GetLastError()); |
682 | db1a4972 | Paolo Bonzini | return -1; |
683 | db1a4972 | Paolo Bonzini | } |
684 | db1a4972 | Paolo Bonzini | |
685 | cd0544ee | Stefan Weil | t->timer = hTimer; |
686 | db1a4972 | Paolo Bonzini | return 0; |
687 | db1a4972 | Paolo Bonzini | } |
688 | db1a4972 | Paolo Bonzini | |
689 | db1a4972 | Paolo Bonzini | static void win32_stop_timer(struct qemu_alarm_timer *t) |
690 | db1a4972 | Paolo Bonzini | { |
691 | cd0544ee | Stefan Weil | HANDLE hTimer = t->timer; |
692 | db1a4972 | Paolo Bonzini | |
693 | 68c23e55 | Paolo Bonzini | if (hTimer) {
|
694 | 68c23e55 | Paolo Bonzini | DeleteTimerQueueTimer(NULL, hTimer, NULL); |
695 | 68c23e55 | Paolo Bonzini | } |
696 | db1a4972 | Paolo Bonzini | } |
697 | db1a4972 | Paolo Bonzini | |
698 | f3fc6e2e | Paolo Bonzini | static void win32_rearm_timer(struct qemu_alarm_timer *t, |
699 | f3fc6e2e | Paolo Bonzini | int64_t nearest_delta_ns) |
700 | db1a4972 | Paolo Bonzini | { |
701 | cd0544ee | Stefan Weil | HANDLE hTimer = t->timer; |
702 | 5bfb723f | Stefano Stabellini | int64_t nearest_delta_ms; |
703 | 68c23e55 | Paolo Bonzini | BOOLEAN success; |
704 | db1a4972 | Paolo Bonzini | |
705 | 5bfb723f | Stefano Stabellini | nearest_delta_ms = nearest_delta_ns / 1000000;
|
706 | cfced5b2 | Paolo Bonzini | if (nearest_delta_ms < 1) { |
707 | cfced5b2 | Paolo Bonzini | nearest_delta_ms = 1;
|
708 | cfced5b2 | Paolo Bonzini | } |
709 | 5bfb723f | Stefano Stabellini | /* ULONG_MAX can be 32 bit */
|
710 | 5bfb723f | Stefano Stabellini | if (nearest_delta_ms > ULONG_MAX) {
|
711 | 5bfb723f | Stefano Stabellini | nearest_delta_ms = ULONG_MAX; |
712 | 5bfb723f | Stefano Stabellini | } |
713 | 68c23e55 | Paolo Bonzini | success = ChangeTimerQueueTimer(NULL,
|
714 | 68c23e55 | Paolo Bonzini | hTimer, |
715 | 5bfb723f | Stefano Stabellini | (unsigned long) nearest_delta_ms, |
716 | 68c23e55 | Paolo Bonzini | 3600000);
|
717 | db1a4972 | Paolo Bonzini | |
718 | 68c23e55 | Paolo Bonzini | if (!success) {
|
719 | 68c23e55 | Paolo Bonzini | fprintf(stderr, "Failed to rearm win32 alarm timer: %ld\n",
|
720 | 68c23e55 | Paolo Bonzini | GetLastError()); |
721 | 68c23e55 | Paolo Bonzini | exit(-1);
|
722 | db1a4972 | Paolo Bonzini | } |
723 | 68c23e55 | Paolo Bonzini | |
724 | db1a4972 | Paolo Bonzini | } |
725 | db1a4972 | Paolo Bonzini | |
726 | db1a4972 | Paolo Bonzini | #endif /* _WIN32 */ |
727 | db1a4972 | Paolo Bonzini | |
728 | 4260a739 | Paolo Bonzini | static void quit_timers(void) |
729 | 4260a739 | Paolo Bonzini | { |
730 | 4260a739 | Paolo Bonzini | struct qemu_alarm_timer *t = alarm_timer;
|
731 | 4260a739 | Paolo Bonzini | alarm_timer = NULL;
|
732 | 4260a739 | Paolo Bonzini | t->stop(t); |
733 | 4260a739 | Paolo Bonzini | } |
734 | 4260a739 | Paolo Bonzini | |
735 | 253ecf83 | Stefan Weil | #ifdef CONFIG_POSIX
|
736 | c8122c35 | Paolo Bonzini | static void reinit_timers(void) |
737 | c8122c35 | Paolo Bonzini | { |
738 | c8122c35 | Paolo Bonzini | struct qemu_alarm_timer *t = alarm_timer;
|
739 | c8122c35 | Paolo Bonzini | t->stop(t); |
740 | c8122c35 | Paolo Bonzini | if (t->start(t)) {
|
741 | c8122c35 | Paolo Bonzini | fprintf(stderr, "Internal timer error: aborting\n");
|
742 | c8122c35 | Paolo Bonzini | exit(1);
|
743 | c8122c35 | Paolo Bonzini | } |
744 | c8122c35 | Paolo Bonzini | qemu_rearm_alarm_timer(t); |
745 | c8122c35 | Paolo Bonzini | } |
746 | 253ecf83 | Stefan Weil | #endif /* CONFIG_POSIX */ |
747 | c8122c35 | Paolo Bonzini | |
748 | db1a4972 | Paolo Bonzini | int init_timer_alarm(void) |
749 | db1a4972 | Paolo Bonzini | { |
750 | db1a4972 | Paolo Bonzini | struct qemu_alarm_timer *t = NULL; |
751 | db1a4972 | Paolo Bonzini | int i, err = -1; |
752 | db1a4972 | Paolo Bonzini | |
753 | 744ca8e3 | Paolo Bonzini | if (alarm_timer) {
|
754 | 744ca8e3 | Paolo Bonzini | return 0; |
755 | 744ca8e3 | Paolo Bonzini | } |
756 | 744ca8e3 | Paolo Bonzini | |
757 | db1a4972 | Paolo Bonzini | for (i = 0; alarm_timers[i].name; i++) { |
758 | db1a4972 | Paolo Bonzini | t = &alarm_timers[i]; |
759 | db1a4972 | Paolo Bonzini | |
760 | db1a4972 | Paolo Bonzini | err = t->start(t); |
761 | db1a4972 | Paolo Bonzini | if (!err)
|
762 | db1a4972 | Paolo Bonzini | break;
|
763 | db1a4972 | Paolo Bonzini | } |
764 | db1a4972 | Paolo Bonzini | |
765 | db1a4972 | Paolo Bonzini | if (err) {
|
766 | db1a4972 | Paolo Bonzini | err = -ENOENT; |
767 | db1a4972 | Paolo Bonzini | goto fail;
|
768 | db1a4972 | Paolo Bonzini | } |
769 | db1a4972 | Paolo Bonzini | |
770 | 4260a739 | Paolo Bonzini | atexit(quit_timers); |
771 | c8122c35 | Paolo Bonzini | #ifdef CONFIG_POSIX
|
772 | c8122c35 | Paolo Bonzini | pthread_atfork(NULL, NULL, reinit_timers); |
773 | c8122c35 | Paolo Bonzini | #endif
|
774 | db1a4972 | Paolo Bonzini | alarm_timer = t; |
775 | db1a4972 | Paolo Bonzini | return 0; |
776 | db1a4972 | Paolo Bonzini | |
777 | db1a4972 | Paolo Bonzini | fail:
|
778 | db1a4972 | Paolo Bonzini | return err;
|
779 | db1a4972 | Paolo Bonzini | } |