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1 | db1a4972 | Paolo Bonzini | /*
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2 | db1a4972 | Paolo Bonzini | * QEMU System Emulator
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3 | db1a4972 | Paolo Bonzini | *
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4 | db1a4972 | Paolo Bonzini | * Copyright (c) 2003-2008 Fabrice Bellard
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5 | db1a4972 | Paolo Bonzini | *
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6 | db1a4972 | Paolo Bonzini | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | db1a4972 | Paolo Bonzini | * of this software and associated documentation files (the "Software"), to deal
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8 | db1a4972 | Paolo Bonzini | * in the Software without restriction, including without limitation the rights
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9 | db1a4972 | Paolo Bonzini | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | db1a4972 | Paolo Bonzini | * copies of the Software, and to permit persons to whom the Software is
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11 | db1a4972 | Paolo Bonzini | * furnished to do so, subject to the following conditions:
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12 | db1a4972 | Paolo Bonzini | *
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13 | db1a4972 | Paolo Bonzini | * The above copyright notice and this permission notice shall be included in
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14 | db1a4972 | Paolo Bonzini | * all copies or substantial portions of the Software.
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15 | db1a4972 | Paolo Bonzini | *
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16 | db1a4972 | Paolo Bonzini | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | db1a4972 | Paolo Bonzini | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | db1a4972 | Paolo Bonzini | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | db1a4972 | Paolo Bonzini | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | db1a4972 | Paolo Bonzini | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | db1a4972 | Paolo Bonzini | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | db1a4972 | Paolo Bonzini | * THE SOFTWARE.
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23 | db1a4972 | Paolo Bonzini | */
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24 | db1a4972 | Paolo Bonzini | |
25 | db1a4972 | Paolo Bonzini | #include "sysemu.h" |
26 | db1a4972 | Paolo Bonzini | #include "net.h" |
27 | db1a4972 | Paolo Bonzini | #include "monitor.h" |
28 | db1a4972 | Paolo Bonzini | #include "console.h" |
29 | db1a4972 | Paolo Bonzini | |
30 | db1a4972 | Paolo Bonzini | #include "hw/hw.h" |
31 | db1a4972 | Paolo Bonzini | |
32 | db1a4972 | Paolo Bonzini | #include <unistd.h> |
33 | db1a4972 | Paolo Bonzini | #include <fcntl.h> |
34 | db1a4972 | Paolo Bonzini | #include <time.h> |
35 | db1a4972 | Paolo Bonzini | #include <errno.h> |
36 | db1a4972 | Paolo Bonzini | #include <sys/time.h> |
37 | db1a4972 | Paolo Bonzini | #include <signal.h> |
38 | 44459349 | Juergen Lock | #ifdef __FreeBSD__
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39 | 44459349 | Juergen Lock | #include <sys/param.h> |
40 | 44459349 | Juergen Lock | #endif
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41 | db1a4972 | Paolo Bonzini | |
42 | db1a4972 | Paolo Bonzini | #ifdef _WIN32
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43 | db1a4972 | Paolo Bonzini | #include <windows.h> |
44 | db1a4972 | Paolo Bonzini | #include <mmsystem.h> |
45 | db1a4972 | Paolo Bonzini | #endif
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46 | db1a4972 | Paolo Bonzini | |
47 | db1a4972 | Paolo Bonzini | #include "qemu-timer.h" |
48 | db1a4972 | Paolo Bonzini | |
49 | db1a4972 | Paolo Bonzini | /***********************************************************/
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50 | db1a4972 | Paolo Bonzini | /* timers */
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51 | db1a4972 | Paolo Bonzini | |
52 | db1a4972 | Paolo Bonzini | #define QEMU_CLOCK_REALTIME 0 |
53 | db1a4972 | Paolo Bonzini | #define QEMU_CLOCK_VIRTUAL 1 |
54 | db1a4972 | Paolo Bonzini | #define QEMU_CLOCK_HOST 2 |
55 | db1a4972 | Paolo Bonzini | |
56 | db1a4972 | Paolo Bonzini | struct QEMUClock {
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57 | db1a4972 | Paolo Bonzini | int type;
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58 | db1a4972 | Paolo Bonzini | int enabled;
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59 | ab33fcda | Paolo Bonzini | |
60 | 688eb389 | Paolo Bonzini | QEMUTimer *active_timers; |
61 | 691a0c9c | Jan Kiszka | |
62 | 691a0c9c | Jan Kiszka | NotifierList reset_notifiers; |
63 | 691a0c9c | Jan Kiszka | int64_t last; |
64 | db1a4972 | Paolo Bonzini | }; |
65 | db1a4972 | Paolo Bonzini | |
66 | db1a4972 | Paolo Bonzini | struct QEMUTimer {
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67 | db1a4972 | Paolo Bonzini | QEMUClock *clock; |
68 | 4a998740 | Paolo Bonzini | int64_t expire_time; /* in nanoseconds */
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69 | 4a998740 | Paolo Bonzini | int scale;
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70 | db1a4972 | Paolo Bonzini | QEMUTimerCB *cb; |
71 | db1a4972 | Paolo Bonzini | void *opaque;
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72 | db1a4972 | Paolo Bonzini | struct QEMUTimer *next;
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73 | db1a4972 | Paolo Bonzini | }; |
74 | db1a4972 | Paolo Bonzini | |
75 | db1a4972 | Paolo Bonzini | struct qemu_alarm_timer {
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76 | db1a4972 | Paolo Bonzini | char const *name; |
77 | db1a4972 | Paolo Bonzini | int (*start)(struct qemu_alarm_timer *t); |
78 | db1a4972 | Paolo Bonzini | void (*stop)(struct qemu_alarm_timer *t); |
79 | f3fc6e2e | Paolo Bonzini | void (*rearm)(struct qemu_alarm_timer *t, int64_t nearest_delta_ns); |
80 | cd0544ee | Stefan Weil | #if defined(__linux__)
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81 | cd0544ee | Stefan Weil | int fd;
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82 | cd0544ee | Stefan Weil | timer_t timer; |
83 | cd0544ee | Stefan Weil | #elif defined(_WIN32)
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84 | cd0544ee | Stefan Weil | HANDLE timer; |
85 | cd0544ee | Stefan Weil | #endif
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86 | db1a4972 | Paolo Bonzini | char expired;
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87 | db1a4972 | Paolo Bonzini | char pending;
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88 | db1a4972 | Paolo Bonzini | }; |
89 | db1a4972 | Paolo Bonzini | |
90 | db1a4972 | Paolo Bonzini | static struct qemu_alarm_timer *alarm_timer; |
91 | db1a4972 | Paolo Bonzini | |
92 | 45c7b37f | Stefan Weil | static bool qemu_timer_expired_ns(QEMUTimer *timer_head, int64_t current_time) |
93 | 45c7b37f | Stefan Weil | { |
94 | 45c7b37f | Stefan Weil | return timer_head && (timer_head->expire_time <= current_time);
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95 | 45c7b37f | Stefan Weil | } |
96 | 45c7b37f | Stefan Weil | |
97 | db1a4972 | Paolo Bonzini | int qemu_alarm_pending(void) |
98 | db1a4972 | Paolo Bonzini | { |
99 | db1a4972 | Paolo Bonzini | return alarm_timer->pending;
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100 | db1a4972 | Paolo Bonzini | } |
101 | db1a4972 | Paolo Bonzini | |
102 | db1a4972 | Paolo Bonzini | static inline int alarm_has_dynticks(struct qemu_alarm_timer *t) |
103 | db1a4972 | Paolo Bonzini | { |
104 | db1a4972 | Paolo Bonzini | return !!t->rearm;
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105 | db1a4972 | Paolo Bonzini | } |
106 | db1a4972 | Paolo Bonzini | |
107 | f3fc6e2e | Paolo Bonzini | static int64_t qemu_next_alarm_deadline(void) |
108 | f3fc6e2e | Paolo Bonzini | { |
109 | f3fc6e2e | Paolo Bonzini | int64_t delta; |
110 | f3fc6e2e | Paolo Bonzini | int64_t rtdelta; |
111 | f3fc6e2e | Paolo Bonzini | |
112 | f3fc6e2e | Paolo Bonzini | if (!use_icount && vm_clock->active_timers) {
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113 | f3fc6e2e | Paolo Bonzini | delta = vm_clock->active_timers->expire_time - |
114 | f3fc6e2e | Paolo Bonzini | qemu_get_clock_ns(vm_clock); |
115 | f3fc6e2e | Paolo Bonzini | } else {
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116 | f3fc6e2e | Paolo Bonzini | delta = INT32_MAX; |
117 | f3fc6e2e | Paolo Bonzini | } |
118 | f3fc6e2e | Paolo Bonzini | if (host_clock->active_timers) {
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119 | f3fc6e2e | Paolo Bonzini | int64_t hdelta = host_clock->active_timers->expire_time - |
120 | f3fc6e2e | Paolo Bonzini | qemu_get_clock_ns(host_clock); |
121 | f3fc6e2e | Paolo Bonzini | if (hdelta < delta) {
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122 | f3fc6e2e | Paolo Bonzini | delta = hdelta; |
123 | f3fc6e2e | Paolo Bonzini | } |
124 | f3fc6e2e | Paolo Bonzini | } |
125 | f3fc6e2e | Paolo Bonzini | if (rt_clock->active_timers) {
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126 | f3fc6e2e | Paolo Bonzini | rtdelta = (rt_clock->active_timers->expire_time - |
127 | f3fc6e2e | Paolo Bonzini | qemu_get_clock_ns(rt_clock)); |
128 | f3fc6e2e | Paolo Bonzini | if (rtdelta < delta) {
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129 | f3fc6e2e | Paolo Bonzini | delta = rtdelta; |
130 | f3fc6e2e | Paolo Bonzini | } |
131 | f3fc6e2e | Paolo Bonzini | } |
132 | f3fc6e2e | Paolo Bonzini | |
133 | f3fc6e2e | Paolo Bonzini | return delta;
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134 | f3fc6e2e | Paolo Bonzini | } |
135 | f3fc6e2e | Paolo Bonzini | |
136 | db1a4972 | Paolo Bonzini | static void qemu_rearm_alarm_timer(struct qemu_alarm_timer *t) |
137 | db1a4972 | Paolo Bonzini | { |
138 | f3fc6e2e | Paolo Bonzini | int64_t nearest_delta_ns; |
139 | f3fc6e2e | Paolo Bonzini | assert(alarm_has_dynticks(t)); |
140 | f3fc6e2e | Paolo Bonzini | if (!rt_clock->active_timers &&
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141 | f3fc6e2e | Paolo Bonzini | !vm_clock->active_timers && |
142 | f3fc6e2e | Paolo Bonzini | !host_clock->active_timers) { |
143 | db1a4972 | Paolo Bonzini | return;
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144 | f3fc6e2e | Paolo Bonzini | } |
145 | f3fc6e2e | Paolo Bonzini | nearest_delta_ns = qemu_next_alarm_deadline(); |
146 | f3fc6e2e | Paolo Bonzini | t->rearm(t, nearest_delta_ns); |
147 | db1a4972 | Paolo Bonzini | } |
148 | db1a4972 | Paolo Bonzini | |
149 | 9c13246a | Paolo Bonzini | /* TODO: MIN_TIMER_REARM_NS should be optimized */
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150 | 9c13246a | Paolo Bonzini | #define MIN_TIMER_REARM_NS 250000 |
151 | db1a4972 | Paolo Bonzini | |
152 | db1a4972 | Paolo Bonzini | #ifdef _WIN32
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153 | db1a4972 | Paolo Bonzini | |
154 | 2f9cba0c | Stefan Weil | static int mm_start_timer(struct qemu_alarm_timer *t); |
155 | 2f9cba0c | Stefan Weil | static void mm_stop_timer(struct qemu_alarm_timer *t); |
156 | f3fc6e2e | Paolo Bonzini | static void mm_rearm_timer(struct qemu_alarm_timer *t, int64_t delta); |
157 | 2f9cba0c | Stefan Weil | |
158 | db1a4972 | Paolo Bonzini | static int win32_start_timer(struct qemu_alarm_timer *t); |
159 | db1a4972 | Paolo Bonzini | static void win32_stop_timer(struct qemu_alarm_timer *t); |
160 | f3fc6e2e | Paolo Bonzini | static void win32_rearm_timer(struct qemu_alarm_timer *t, int64_t delta); |
161 | db1a4972 | Paolo Bonzini | |
162 | db1a4972 | Paolo Bonzini | #else
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163 | db1a4972 | Paolo Bonzini | |
164 | db1a4972 | Paolo Bonzini | static int unix_start_timer(struct qemu_alarm_timer *t); |
165 | db1a4972 | Paolo Bonzini | static void unix_stop_timer(struct qemu_alarm_timer *t); |
166 | f3fc6e2e | Paolo Bonzini | static void unix_rearm_timer(struct qemu_alarm_timer *t, int64_t delta); |
167 | db1a4972 | Paolo Bonzini | |
168 | db1a4972 | Paolo Bonzini | #ifdef __linux__
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169 | db1a4972 | Paolo Bonzini | |
170 | db1a4972 | Paolo Bonzini | static int dynticks_start_timer(struct qemu_alarm_timer *t); |
171 | db1a4972 | Paolo Bonzini | static void dynticks_stop_timer(struct qemu_alarm_timer *t); |
172 | f3fc6e2e | Paolo Bonzini | static void dynticks_rearm_timer(struct qemu_alarm_timer *t, int64_t delta); |
173 | db1a4972 | Paolo Bonzini | |
174 | db1a4972 | Paolo Bonzini | #endif /* __linux__ */ |
175 | db1a4972 | Paolo Bonzini | |
176 | db1a4972 | Paolo Bonzini | #endif /* _WIN32 */ |
177 | db1a4972 | Paolo Bonzini | |
178 | db1a4972 | Paolo Bonzini | static struct qemu_alarm_timer alarm_timers[] = { |
179 | db1a4972 | Paolo Bonzini | #ifndef _WIN32
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180 | db1a4972 | Paolo Bonzini | #ifdef __linux__
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181 | db1a4972 | Paolo Bonzini | {"dynticks", dynticks_start_timer,
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182 | cd0544ee | Stefan Weil | dynticks_stop_timer, dynticks_rearm_timer}, |
183 | db1a4972 | Paolo Bonzini | #endif
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184 | 84682834 | Paolo Bonzini | {"unix", unix_start_timer, unix_stop_timer, unix_rearm_timer},
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185 | db1a4972 | Paolo Bonzini | #else
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186 | 2f9cba0c | Stefan Weil | {"mmtimer", mm_start_timer, mm_stop_timer, NULL}, |
187 | 2f9cba0c | Stefan Weil | {"mmtimer2", mm_start_timer, mm_stop_timer, mm_rearm_timer},
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188 | cd0544ee | Stefan Weil | {"dynticks", win32_start_timer, win32_stop_timer, win32_rearm_timer},
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189 | cd0544ee | Stefan Weil | {"win32", win32_start_timer, win32_stop_timer, NULL}, |
190 | db1a4972 | Paolo Bonzini | #endif
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191 | db1a4972 | Paolo Bonzini | {NULL, }
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192 | db1a4972 | Paolo Bonzini | }; |
193 | db1a4972 | Paolo Bonzini | |
194 | db1a4972 | Paolo Bonzini | static void show_available_alarms(void) |
195 | db1a4972 | Paolo Bonzini | { |
196 | db1a4972 | Paolo Bonzini | int i;
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197 | db1a4972 | Paolo Bonzini | |
198 | db1a4972 | Paolo Bonzini | printf("Available alarm timers, in order of precedence:\n");
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199 | db1a4972 | Paolo Bonzini | for (i = 0; alarm_timers[i].name; i++) |
200 | db1a4972 | Paolo Bonzini | printf("%s\n", alarm_timers[i].name);
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201 | db1a4972 | Paolo Bonzini | } |
202 | db1a4972 | Paolo Bonzini | |
203 | db1a4972 | Paolo Bonzini | void configure_alarms(char const *opt) |
204 | db1a4972 | Paolo Bonzini | { |
205 | db1a4972 | Paolo Bonzini | int i;
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206 | db1a4972 | Paolo Bonzini | int cur = 0; |
207 | db1a4972 | Paolo Bonzini | int count = ARRAY_SIZE(alarm_timers) - 1; |
208 | db1a4972 | Paolo Bonzini | char *arg;
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209 | db1a4972 | Paolo Bonzini | char *name;
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210 | db1a4972 | Paolo Bonzini | struct qemu_alarm_timer tmp;
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211 | db1a4972 | Paolo Bonzini | |
212 | db1a4972 | Paolo Bonzini | if (!strcmp(opt, "?")) { |
213 | db1a4972 | Paolo Bonzini | show_available_alarms(); |
214 | db1a4972 | Paolo Bonzini | exit(0);
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215 | db1a4972 | Paolo Bonzini | } |
216 | db1a4972 | Paolo Bonzini | |
217 | 7267c094 | Anthony Liguori | arg = g_strdup(opt); |
218 | db1a4972 | Paolo Bonzini | |
219 | db1a4972 | Paolo Bonzini | /* Reorder the array */
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220 | db1a4972 | Paolo Bonzini | name = strtok(arg, ",");
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221 | db1a4972 | Paolo Bonzini | while (name) {
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222 | db1a4972 | Paolo Bonzini | for (i = 0; i < count && alarm_timers[i].name; i++) { |
223 | db1a4972 | Paolo Bonzini | if (!strcmp(alarm_timers[i].name, name))
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224 | db1a4972 | Paolo Bonzini | break;
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225 | db1a4972 | Paolo Bonzini | } |
226 | db1a4972 | Paolo Bonzini | |
227 | db1a4972 | Paolo Bonzini | if (i == count) {
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228 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Unknown clock %s\n", name);
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229 | db1a4972 | Paolo Bonzini | goto next;
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230 | db1a4972 | Paolo Bonzini | } |
231 | db1a4972 | Paolo Bonzini | |
232 | db1a4972 | Paolo Bonzini | if (i < cur)
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233 | db1a4972 | Paolo Bonzini | /* Ignore */
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234 | db1a4972 | Paolo Bonzini | goto next;
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235 | db1a4972 | Paolo Bonzini | |
236 | db1a4972 | Paolo Bonzini | /* Swap */
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237 | db1a4972 | Paolo Bonzini | tmp = alarm_timers[i]; |
238 | db1a4972 | Paolo Bonzini | alarm_timers[i] = alarm_timers[cur]; |
239 | db1a4972 | Paolo Bonzini | alarm_timers[cur] = tmp; |
240 | db1a4972 | Paolo Bonzini | |
241 | db1a4972 | Paolo Bonzini | cur++; |
242 | db1a4972 | Paolo Bonzini | next:
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243 | db1a4972 | Paolo Bonzini | name = strtok(NULL, ","); |
244 | db1a4972 | Paolo Bonzini | } |
245 | db1a4972 | Paolo Bonzini | |
246 | 7267c094 | Anthony Liguori | g_free(arg); |
247 | db1a4972 | Paolo Bonzini | |
248 | db1a4972 | Paolo Bonzini | if (cur) {
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249 | db1a4972 | Paolo Bonzini | /* Disable remaining timers */
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250 | db1a4972 | Paolo Bonzini | for (i = cur; i < count; i++)
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251 | db1a4972 | Paolo Bonzini | alarm_timers[i].name = NULL;
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252 | db1a4972 | Paolo Bonzini | } else {
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253 | db1a4972 | Paolo Bonzini | show_available_alarms(); |
254 | db1a4972 | Paolo Bonzini | exit(1);
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255 | db1a4972 | Paolo Bonzini | } |
256 | db1a4972 | Paolo Bonzini | } |
257 | db1a4972 | Paolo Bonzini | |
258 | db1a4972 | Paolo Bonzini | QEMUClock *rt_clock; |
259 | db1a4972 | Paolo Bonzini | QEMUClock *vm_clock; |
260 | db1a4972 | Paolo Bonzini | QEMUClock *host_clock; |
261 | db1a4972 | Paolo Bonzini | |
262 | db1a4972 | Paolo Bonzini | static QEMUClock *qemu_new_clock(int type) |
263 | db1a4972 | Paolo Bonzini | { |
264 | db1a4972 | Paolo Bonzini | QEMUClock *clock; |
265 | 691a0c9c | Jan Kiszka | |
266 | 7267c094 | Anthony Liguori | clock = g_malloc0(sizeof(QEMUClock));
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267 | db1a4972 | Paolo Bonzini | clock->type = type; |
268 | db1a4972 | Paolo Bonzini | clock->enabled = 1;
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269 | 2ff68d07 | Paolo Bonzini | clock->last = INT64_MIN; |
270 | 691a0c9c | Jan Kiszka | notifier_list_init(&clock->reset_notifiers); |
271 | db1a4972 | Paolo Bonzini | return clock;
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272 | db1a4972 | Paolo Bonzini | } |
273 | db1a4972 | Paolo Bonzini | |
274 | db1a4972 | Paolo Bonzini | void qemu_clock_enable(QEMUClock *clock, int enabled) |
275 | db1a4972 | Paolo Bonzini | { |
276 | db1a4972 | Paolo Bonzini | clock->enabled = enabled; |
277 | db1a4972 | Paolo Bonzini | } |
278 | db1a4972 | Paolo Bonzini | |
279 | dc2dfcf0 | Paolo Bonzini | int64_t qemu_clock_has_timers(QEMUClock *clock) |
280 | dc2dfcf0 | Paolo Bonzini | { |
281 | dc2dfcf0 | Paolo Bonzini | return !!clock->active_timers;
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282 | dc2dfcf0 | Paolo Bonzini | } |
283 | dc2dfcf0 | Paolo Bonzini | |
284 | dc2dfcf0 | Paolo Bonzini | int64_t qemu_clock_expired(QEMUClock *clock) |
285 | dc2dfcf0 | Paolo Bonzini | { |
286 | dc2dfcf0 | Paolo Bonzini | return (clock->active_timers &&
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287 | dc2dfcf0 | Paolo Bonzini | clock->active_timers->expire_time < qemu_get_clock_ns(clock)); |
288 | dc2dfcf0 | Paolo Bonzini | } |
289 | dc2dfcf0 | Paolo Bonzini | |
290 | dc2dfcf0 | Paolo Bonzini | int64_t qemu_clock_deadline(QEMUClock *clock) |
291 | dc2dfcf0 | Paolo Bonzini | { |
292 | dc2dfcf0 | Paolo Bonzini | /* To avoid problems with overflow limit this to 2^32. */
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293 | dc2dfcf0 | Paolo Bonzini | int64_t delta = INT32_MAX; |
294 | dc2dfcf0 | Paolo Bonzini | |
295 | dc2dfcf0 | Paolo Bonzini | if (clock->active_timers) {
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296 | dc2dfcf0 | Paolo Bonzini | delta = clock->active_timers->expire_time - qemu_get_clock_ns(clock); |
297 | dc2dfcf0 | Paolo Bonzini | } |
298 | dc2dfcf0 | Paolo Bonzini | if (delta < 0) { |
299 | dc2dfcf0 | Paolo Bonzini | delta = 0;
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300 | dc2dfcf0 | Paolo Bonzini | } |
301 | dc2dfcf0 | Paolo Bonzini | return delta;
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302 | dc2dfcf0 | Paolo Bonzini | } |
303 | dc2dfcf0 | Paolo Bonzini | |
304 | 4a998740 | Paolo Bonzini | QEMUTimer *qemu_new_timer(QEMUClock *clock, int scale,
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305 | 4a998740 | Paolo Bonzini | QEMUTimerCB *cb, void *opaque)
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306 | db1a4972 | Paolo Bonzini | { |
307 | db1a4972 | Paolo Bonzini | QEMUTimer *ts; |
308 | db1a4972 | Paolo Bonzini | |
309 | 7267c094 | Anthony Liguori | ts = g_malloc0(sizeof(QEMUTimer));
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310 | db1a4972 | Paolo Bonzini | ts->clock = clock; |
311 | db1a4972 | Paolo Bonzini | ts->cb = cb; |
312 | db1a4972 | Paolo Bonzini | ts->opaque = opaque; |
313 | 4a998740 | Paolo Bonzini | ts->scale = scale; |
314 | db1a4972 | Paolo Bonzini | return ts;
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315 | db1a4972 | Paolo Bonzini | } |
316 | db1a4972 | Paolo Bonzini | |
317 | db1a4972 | Paolo Bonzini | void qemu_free_timer(QEMUTimer *ts)
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318 | db1a4972 | Paolo Bonzini | { |
319 | 7267c094 | Anthony Liguori | g_free(ts); |
320 | db1a4972 | Paolo Bonzini | } |
321 | db1a4972 | Paolo Bonzini | |
322 | db1a4972 | Paolo Bonzini | /* stop a timer, but do not dealloc it */
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323 | db1a4972 | Paolo Bonzini | void qemu_del_timer(QEMUTimer *ts)
|
324 | db1a4972 | Paolo Bonzini | { |
325 | db1a4972 | Paolo Bonzini | QEMUTimer **pt, *t; |
326 | db1a4972 | Paolo Bonzini | |
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 | db1a4972 | Paolo Bonzini | if (!t)
|
333 | db1a4972 | Paolo Bonzini | break;
|
334 | db1a4972 | Paolo Bonzini | if (t == ts) {
|
335 | db1a4972 | Paolo Bonzini | *pt = t->next; |
336 | db1a4972 | Paolo Bonzini | break;
|
337 | db1a4972 | Paolo Bonzini | } |
338 | db1a4972 | Paolo Bonzini | pt = &t->next; |
339 | db1a4972 | Paolo Bonzini | } |
340 | db1a4972 | Paolo Bonzini | } |
341 | db1a4972 | Paolo Bonzini | |
342 | db1a4972 | Paolo Bonzini | /* modify the current timer so that it will be fired when current_time
|
343 | db1a4972 | Paolo Bonzini | >= expire_time. The corresponding callback will be called. */
|
344 | 2ff68d07 | Paolo Bonzini | void qemu_mod_timer_ns(QEMUTimer *ts, int64_t expire_time)
|
345 | db1a4972 | Paolo Bonzini | { |
346 | db1a4972 | Paolo Bonzini | QEMUTimer **pt, *t; |
347 | db1a4972 | Paolo Bonzini | |
348 | db1a4972 | Paolo Bonzini | qemu_del_timer(ts); |
349 | db1a4972 | Paolo Bonzini | |
350 | db1a4972 | Paolo Bonzini | /* add the timer in the sorted list */
|
351 | db1a4972 | Paolo Bonzini | /* NOTE: this code must be signal safe because
|
352 | db1a4972 | Paolo Bonzini | qemu_timer_expired() can be called from a signal. */
|
353 | 688eb389 | Paolo Bonzini | pt = &ts->clock->active_timers; |
354 | db1a4972 | Paolo Bonzini | for(;;) {
|
355 | db1a4972 | Paolo Bonzini | t = *pt; |
356 | 45c7b37f | Stefan Weil | if (!qemu_timer_expired_ns(t, expire_time)) {
|
357 | db1a4972 | Paolo Bonzini | break;
|
358 | 45c7b37f | Stefan Weil | } |
359 | db1a4972 | Paolo Bonzini | pt = &t->next; |
360 | db1a4972 | Paolo Bonzini | } |
361 | db1a4972 | Paolo Bonzini | ts->expire_time = expire_time; |
362 | db1a4972 | Paolo Bonzini | ts->next = *pt; |
363 | db1a4972 | Paolo Bonzini | *pt = ts; |
364 | db1a4972 | Paolo Bonzini | |
365 | db1a4972 | Paolo Bonzini | /* Rearm if necessary */
|
366 | 688eb389 | Paolo Bonzini | if (pt == &ts->clock->active_timers) {
|
367 | db1a4972 | Paolo Bonzini | if (!alarm_timer->pending) {
|
368 | db1a4972 | Paolo Bonzini | qemu_rearm_alarm_timer(alarm_timer); |
369 | db1a4972 | Paolo Bonzini | } |
370 | db1a4972 | Paolo Bonzini | /* Interrupt execution to force deadline recalculation. */
|
371 | ab33fcda | Paolo Bonzini | qemu_clock_warp(ts->clock); |
372 | ab33fcda | Paolo Bonzini | if (use_icount) {
|
373 | db1a4972 | Paolo Bonzini | qemu_notify_event(); |
374 | ab33fcda | Paolo Bonzini | } |
375 | db1a4972 | Paolo Bonzini | } |
376 | db1a4972 | Paolo Bonzini | } |
377 | db1a4972 | Paolo Bonzini | |
378 | 4a998740 | Paolo Bonzini | void qemu_mod_timer(QEMUTimer *ts, int64_t expire_time)
|
379 | 4a998740 | Paolo Bonzini | { |
380 | 4a998740 | Paolo Bonzini | qemu_mod_timer_ns(ts, expire_time * ts->scale); |
381 | 4a998740 | Paolo Bonzini | } |
382 | 4a998740 | Paolo Bonzini | |
383 | db1a4972 | Paolo Bonzini | int qemu_timer_pending(QEMUTimer *ts)
|
384 | db1a4972 | Paolo Bonzini | { |
385 | db1a4972 | Paolo Bonzini | QEMUTimer *t; |
386 | 688eb389 | Paolo Bonzini | for (t = ts->clock->active_timers; t != NULL; t = t->next) { |
387 | db1a4972 | Paolo Bonzini | if (t == ts)
|
388 | db1a4972 | Paolo Bonzini | return 1; |
389 | db1a4972 | Paolo Bonzini | } |
390 | db1a4972 | Paolo Bonzini | return 0; |
391 | db1a4972 | Paolo Bonzini | } |
392 | db1a4972 | Paolo Bonzini | |
393 | db1a4972 | Paolo Bonzini | int qemu_timer_expired(QEMUTimer *timer_head, int64_t current_time)
|
394 | db1a4972 | Paolo Bonzini | { |
395 | 45c7b37f | Stefan Weil | return qemu_timer_expired_ns(timer_head, current_time * timer_head->scale);
|
396 | db1a4972 | Paolo Bonzini | } |
397 | db1a4972 | Paolo Bonzini | |
398 | db1a4972 | Paolo Bonzini | static void qemu_run_timers(QEMUClock *clock) |
399 | db1a4972 | Paolo Bonzini | { |
400 | db1a4972 | Paolo Bonzini | QEMUTimer **ptimer_head, *ts; |
401 | db1a4972 | Paolo Bonzini | int64_t current_time; |
402 | db1a4972 | Paolo Bonzini | |
403 | db1a4972 | Paolo Bonzini | if (!clock->enabled)
|
404 | db1a4972 | Paolo Bonzini | return;
|
405 | db1a4972 | Paolo Bonzini | |
406 | 4a998740 | Paolo Bonzini | current_time = qemu_get_clock_ns(clock); |
407 | 688eb389 | Paolo Bonzini | ptimer_head = &clock->active_timers; |
408 | db1a4972 | Paolo Bonzini | for(;;) {
|
409 | db1a4972 | Paolo Bonzini | ts = *ptimer_head; |
410 | 45c7b37f | Stefan Weil | if (!qemu_timer_expired_ns(ts, current_time)) {
|
411 | db1a4972 | Paolo Bonzini | break;
|
412 | 45c7b37f | Stefan Weil | } |
413 | db1a4972 | Paolo Bonzini | /* remove timer from the list before calling the callback */
|
414 | db1a4972 | Paolo Bonzini | *ptimer_head = ts->next; |
415 | db1a4972 | Paolo Bonzini | ts->next = NULL;
|
416 | db1a4972 | Paolo Bonzini | |
417 | db1a4972 | Paolo Bonzini | /* run the callback (the timer list can be modified) */
|
418 | db1a4972 | Paolo Bonzini | ts->cb(ts->opaque); |
419 | db1a4972 | Paolo Bonzini | } |
420 | db1a4972 | Paolo Bonzini | } |
421 | db1a4972 | Paolo Bonzini | |
422 | db1a4972 | Paolo Bonzini | int64_t qemu_get_clock_ns(QEMUClock *clock) |
423 | db1a4972 | Paolo Bonzini | { |
424 | 691a0c9c | Jan Kiszka | int64_t now, last; |
425 | 691a0c9c | Jan Kiszka | |
426 | db1a4972 | Paolo Bonzini | switch(clock->type) {
|
427 | db1a4972 | Paolo Bonzini | case QEMU_CLOCK_REALTIME:
|
428 | db1a4972 | Paolo Bonzini | return get_clock();
|
429 | db1a4972 | Paolo Bonzini | default:
|
430 | db1a4972 | Paolo Bonzini | case QEMU_CLOCK_VIRTUAL:
|
431 | db1a4972 | Paolo Bonzini | if (use_icount) {
|
432 | db1a4972 | Paolo Bonzini | return cpu_get_icount();
|
433 | db1a4972 | Paolo Bonzini | } else {
|
434 | db1a4972 | Paolo Bonzini | return cpu_get_clock();
|
435 | db1a4972 | Paolo Bonzini | } |
436 | db1a4972 | Paolo Bonzini | case QEMU_CLOCK_HOST:
|
437 | 691a0c9c | Jan Kiszka | now = get_clock_realtime(); |
438 | 691a0c9c | Jan Kiszka | last = clock->last; |
439 | 691a0c9c | Jan Kiszka | clock->last = now; |
440 | 691a0c9c | Jan Kiszka | if (now < last) {
|
441 | 691a0c9c | Jan Kiszka | notifier_list_notify(&clock->reset_notifiers, &now); |
442 | 691a0c9c | Jan Kiszka | } |
443 | 691a0c9c | Jan Kiszka | return now;
|
444 | db1a4972 | Paolo Bonzini | } |
445 | db1a4972 | Paolo Bonzini | } |
446 | db1a4972 | Paolo Bonzini | |
447 | 691a0c9c | Jan Kiszka | void qemu_register_clock_reset_notifier(QEMUClock *clock, Notifier *notifier)
|
448 | 691a0c9c | Jan Kiszka | { |
449 | 691a0c9c | Jan Kiszka | notifier_list_add(&clock->reset_notifiers, notifier); |
450 | 691a0c9c | Jan Kiszka | } |
451 | 691a0c9c | Jan Kiszka | |
452 | 691a0c9c | Jan Kiszka | void qemu_unregister_clock_reset_notifier(QEMUClock *clock, Notifier *notifier)
|
453 | 691a0c9c | Jan Kiszka | { |
454 | 691a0c9c | Jan Kiszka | notifier_list_remove(&clock->reset_notifiers, notifier); |
455 | 691a0c9c | Jan Kiszka | } |
456 | 691a0c9c | Jan Kiszka | |
457 | db1a4972 | Paolo Bonzini | void init_clocks(void) |
458 | db1a4972 | Paolo Bonzini | { |
459 | db1a4972 | Paolo Bonzini | rt_clock = qemu_new_clock(QEMU_CLOCK_REALTIME); |
460 | db1a4972 | Paolo Bonzini | vm_clock = qemu_new_clock(QEMU_CLOCK_VIRTUAL); |
461 | db1a4972 | Paolo Bonzini | host_clock = qemu_new_clock(QEMU_CLOCK_HOST); |
462 | db1a4972 | Paolo Bonzini | } |
463 | db1a4972 | Paolo Bonzini | |
464 | 2ff68d07 | Paolo Bonzini | uint64_t qemu_timer_expire_time_ns(QEMUTimer *ts) |
465 | db1a4972 | Paolo Bonzini | { |
466 | 2ff68d07 | Paolo Bonzini | return qemu_timer_pending(ts) ? ts->expire_time : -1; |
467 | db1a4972 | Paolo Bonzini | } |
468 | db1a4972 | Paolo Bonzini | |
469 | db1a4972 | Paolo Bonzini | void qemu_run_all_timers(void) |
470 | db1a4972 | Paolo Bonzini | { |
471 | ca5a2a4b | Paolo Bonzini | alarm_timer->pending = 0;
|
472 | ca5a2a4b | Paolo Bonzini | |
473 | db1a4972 | Paolo Bonzini | /* rearm timer, if not periodic */
|
474 | db1a4972 | Paolo Bonzini | if (alarm_timer->expired) {
|
475 | db1a4972 | Paolo Bonzini | alarm_timer->expired = 0;
|
476 | db1a4972 | Paolo Bonzini | qemu_rearm_alarm_timer(alarm_timer); |
477 | db1a4972 | Paolo Bonzini | } |
478 | db1a4972 | Paolo Bonzini | |
479 | db1a4972 | Paolo Bonzini | /* vm time timers */
|
480 | a5c57d64 | Paolo Bonzini | qemu_run_timers(vm_clock); |
481 | db1a4972 | Paolo Bonzini | qemu_run_timers(rt_clock); |
482 | db1a4972 | Paolo Bonzini | qemu_run_timers(host_clock); |
483 | db1a4972 | Paolo Bonzini | } |
484 | db1a4972 | Paolo Bonzini | |
485 | db1a4972 | Paolo Bonzini | #ifdef _WIN32
|
486 | 68c23e55 | Paolo Bonzini | static void CALLBACK host_alarm_handler(PVOID lpParam, BOOLEAN unused) |
487 | db1a4972 | Paolo Bonzini | #else
|
488 | db1a4972 | Paolo Bonzini | static void host_alarm_handler(int host_signum) |
489 | db1a4972 | Paolo Bonzini | #endif
|
490 | db1a4972 | Paolo Bonzini | { |
491 | db1a4972 | Paolo Bonzini | struct qemu_alarm_timer *t = alarm_timer;
|
492 | db1a4972 | Paolo Bonzini | if (!t)
|
493 | db1a4972 | Paolo Bonzini | return;
|
494 | db1a4972 | Paolo Bonzini | |
495 | db1a4972 | Paolo Bonzini | #if 0
|
496 | db1a4972 | Paolo Bonzini | #define DISP_FREQ 1000
|
497 | db1a4972 | Paolo Bonzini | {
|
498 | db1a4972 | Paolo Bonzini | static int64_t delta_min = INT64_MAX;
|
499 | db1a4972 | Paolo Bonzini | static int64_t delta_max, delta_cum, last_clock, delta, ti;
|
500 | db1a4972 | Paolo Bonzini | static int count;
|
501 | 74475455 | Paolo Bonzini | ti = qemu_get_clock_ns(vm_clock);
|
502 | db1a4972 | Paolo Bonzini | if (last_clock != 0) {
|
503 | db1a4972 | Paolo Bonzini | delta = ti - last_clock;
|
504 | db1a4972 | Paolo Bonzini | if (delta < delta_min)
|
505 | db1a4972 | Paolo Bonzini | delta_min = delta;
|
506 | db1a4972 | Paolo Bonzini | if (delta > delta_max)
|
507 | db1a4972 | Paolo Bonzini | delta_max = delta;
|
508 | db1a4972 | Paolo Bonzini | delta_cum += delta;
|
509 | db1a4972 | Paolo Bonzini | if (++count == DISP_FREQ) {
|
510 | db1a4972 | Paolo Bonzini | printf("timer: min=%" PRId64 " us max=%" PRId64 " us avg=%" PRId64 " us avg_freq=%0.3f Hz\n",
|
511 | db1a4972 | Paolo Bonzini | muldiv64(delta_min, 1000000, get_ticks_per_sec()),
|
512 | db1a4972 | Paolo Bonzini | muldiv64(delta_max, 1000000, get_ticks_per_sec()),
|
513 | db1a4972 | Paolo Bonzini | muldiv64(delta_cum, 1000000 / DISP_FREQ, get_ticks_per_sec()),
|
514 | db1a4972 | Paolo Bonzini | (double)get_ticks_per_sec() / ((double)delta_cum / DISP_FREQ));
|
515 | db1a4972 | Paolo Bonzini | count = 0;
|
516 | db1a4972 | Paolo Bonzini | delta_min = INT64_MAX;
|
517 | db1a4972 | Paolo Bonzini | delta_max = 0;
|
518 | db1a4972 | Paolo Bonzini | delta_cum = 0;
|
519 | db1a4972 | Paolo Bonzini | }
|
520 | db1a4972 | Paolo Bonzini | }
|
521 | db1a4972 | Paolo Bonzini | last_clock = ti;
|
522 | db1a4972 | Paolo Bonzini | }
|
523 | db1a4972 | Paolo Bonzini | #endif
|
524 | db1a4972 | Paolo Bonzini | if (alarm_has_dynticks(t) ||
|
525 | 4c3d45eb | Paolo Bonzini | qemu_next_alarm_deadline () <= 0) {
|
526 | db1a4972 | Paolo Bonzini | t->expired = alarm_has_dynticks(t); |
527 | db1a4972 | Paolo Bonzini | t->pending = 1;
|
528 | db1a4972 | Paolo Bonzini | qemu_notify_event(); |
529 | db1a4972 | Paolo Bonzini | } |
530 | db1a4972 | Paolo Bonzini | } |
531 | db1a4972 | Paolo Bonzini | |
532 | 4c3d45eb | Paolo Bonzini | #if defined(__linux__)
|
533 | 4c3d45eb | Paolo Bonzini | |
534 | d25f89c9 | Jan Kiszka | #include "compatfd.h" |
535 | d25f89c9 | Jan Kiszka | |
536 | db1a4972 | Paolo Bonzini | static int dynticks_start_timer(struct qemu_alarm_timer *t) |
537 | db1a4972 | Paolo Bonzini | { |
538 | db1a4972 | Paolo Bonzini | struct sigevent ev;
|
539 | db1a4972 | Paolo Bonzini | timer_t host_timer; |
540 | db1a4972 | Paolo Bonzini | struct sigaction act;
|
541 | db1a4972 | Paolo Bonzini | |
542 | db1a4972 | Paolo Bonzini | sigfillset(&act.sa_mask); |
543 | db1a4972 | Paolo Bonzini | act.sa_flags = 0;
|
544 | db1a4972 | Paolo Bonzini | act.sa_handler = host_alarm_handler; |
545 | db1a4972 | Paolo Bonzini | |
546 | db1a4972 | Paolo Bonzini | sigaction(SIGALRM, &act, NULL);
|
547 | db1a4972 | Paolo Bonzini | |
548 | db1a4972 | Paolo Bonzini | /*
|
549 | db1a4972 | Paolo Bonzini | * Initialize ev struct to 0 to avoid valgrind complaining
|
550 | db1a4972 | Paolo Bonzini | * about uninitialized data in timer_create call
|
551 | db1a4972 | Paolo Bonzini | */
|
552 | db1a4972 | Paolo Bonzini | memset(&ev, 0, sizeof(ev)); |
553 | db1a4972 | Paolo Bonzini | ev.sigev_value.sival_int = 0;
|
554 | db1a4972 | Paolo Bonzini | ev.sigev_notify = SIGEV_SIGNAL; |
555 | d25f89c9 | Jan Kiszka | #ifdef SIGEV_THREAD_ID
|
556 | d25f89c9 | Jan Kiszka | if (qemu_signalfd_available()) {
|
557 | d25f89c9 | Jan Kiszka | ev.sigev_notify = SIGEV_THREAD_ID; |
558 | d25f89c9 | Jan Kiszka | ev._sigev_un._tid = qemu_get_thread_id(); |
559 | d25f89c9 | Jan Kiszka | } |
560 | d25f89c9 | Jan Kiszka | #endif /* SIGEV_THREAD_ID */ |
561 | db1a4972 | Paolo Bonzini | ev.sigev_signo = SIGALRM; |
562 | db1a4972 | Paolo Bonzini | |
563 | db1a4972 | Paolo Bonzini | if (timer_create(CLOCK_REALTIME, &ev, &host_timer)) {
|
564 | db1a4972 | Paolo Bonzini | perror("timer_create");
|
565 | db1a4972 | Paolo Bonzini | |
566 | db1a4972 | Paolo Bonzini | /* disable dynticks */
|
567 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Dynamic Ticks disabled\n");
|
568 | db1a4972 | Paolo Bonzini | |
569 | db1a4972 | Paolo Bonzini | return -1; |
570 | db1a4972 | Paolo Bonzini | } |
571 | db1a4972 | Paolo Bonzini | |
572 | cd0544ee | Stefan Weil | t->timer = host_timer; |
573 | db1a4972 | Paolo Bonzini | |
574 | db1a4972 | Paolo Bonzini | return 0; |
575 | db1a4972 | Paolo Bonzini | } |
576 | db1a4972 | Paolo Bonzini | |
577 | db1a4972 | Paolo Bonzini | static void dynticks_stop_timer(struct qemu_alarm_timer *t) |
578 | db1a4972 | Paolo Bonzini | { |
579 | cd0544ee | Stefan Weil | timer_t host_timer = t->timer; |
580 | db1a4972 | Paolo Bonzini | |
581 | db1a4972 | Paolo Bonzini | timer_delete(host_timer); |
582 | db1a4972 | Paolo Bonzini | } |
583 | db1a4972 | Paolo Bonzini | |
584 | f3fc6e2e | Paolo Bonzini | static void dynticks_rearm_timer(struct qemu_alarm_timer *t, |
585 | f3fc6e2e | Paolo Bonzini | int64_t nearest_delta_ns) |
586 | db1a4972 | Paolo Bonzini | { |
587 | cd0544ee | Stefan Weil | timer_t host_timer = t->timer; |
588 | db1a4972 | Paolo Bonzini | struct itimerspec timeout;
|
589 | 9c13246a | Paolo Bonzini | int64_t current_ns; |
590 | db1a4972 | Paolo Bonzini | |
591 | 4c3d45eb | Paolo Bonzini | if (nearest_delta_ns < MIN_TIMER_REARM_NS)
|
592 | 4c3d45eb | Paolo Bonzini | nearest_delta_ns = MIN_TIMER_REARM_NS; |
593 | db1a4972 | Paolo Bonzini | |
594 | db1a4972 | Paolo Bonzini | /* check whether a timer is already running */
|
595 | db1a4972 | Paolo Bonzini | if (timer_gettime(host_timer, &timeout)) {
|
596 | db1a4972 | Paolo Bonzini | perror("gettime");
|
597 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Internal timer error: aborting\n");
|
598 | db1a4972 | Paolo Bonzini | exit(1);
|
599 | db1a4972 | Paolo Bonzini | } |
600 | 9c13246a | Paolo Bonzini | current_ns = timeout.it_value.tv_sec * 1000000000LL + timeout.it_value.tv_nsec;
|
601 | 9c13246a | Paolo Bonzini | if (current_ns && current_ns <= nearest_delta_ns)
|
602 | db1a4972 | Paolo Bonzini | return;
|
603 | db1a4972 | Paolo Bonzini | |
604 | db1a4972 | Paolo Bonzini | timeout.it_interval.tv_sec = 0;
|
605 | db1a4972 | Paolo Bonzini | timeout.it_interval.tv_nsec = 0; /* 0 for one-shot timer */ |
606 | 9c13246a | Paolo Bonzini | timeout.it_value.tv_sec = nearest_delta_ns / 1000000000;
|
607 | 9c13246a | Paolo Bonzini | timeout.it_value.tv_nsec = nearest_delta_ns % 1000000000;
|
608 | db1a4972 | Paolo Bonzini | if (timer_settime(host_timer, 0 /* RELATIVE */, &timeout, NULL)) { |
609 | db1a4972 | Paolo Bonzini | perror("settime");
|
610 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Internal timer error: aborting\n");
|
611 | db1a4972 | Paolo Bonzini | exit(1);
|
612 | db1a4972 | Paolo Bonzini | } |
613 | db1a4972 | Paolo Bonzini | } |
614 | db1a4972 | Paolo Bonzini | |
615 | db1a4972 | Paolo Bonzini | #endif /* defined(__linux__) */ |
616 | db1a4972 | Paolo Bonzini | |
617 | f26e5a54 | Stefan Weil | #if !defined(_WIN32)
|
618 | f26e5a54 | Stefan Weil | |
619 | db1a4972 | Paolo Bonzini | static int unix_start_timer(struct qemu_alarm_timer *t) |
620 | db1a4972 | Paolo Bonzini | { |
621 | db1a4972 | Paolo Bonzini | struct sigaction act;
|
622 | db1a4972 | Paolo Bonzini | |
623 | db1a4972 | Paolo Bonzini | /* timer signal */
|
624 | db1a4972 | Paolo Bonzini | sigfillset(&act.sa_mask); |
625 | db1a4972 | Paolo Bonzini | act.sa_flags = 0;
|
626 | db1a4972 | Paolo Bonzini | act.sa_handler = host_alarm_handler; |
627 | db1a4972 | Paolo Bonzini | |
628 | db1a4972 | Paolo Bonzini | sigaction(SIGALRM, &act, NULL);
|
629 | 84682834 | Paolo Bonzini | return 0; |
630 | 84682834 | Paolo Bonzini | } |
631 | db1a4972 | Paolo Bonzini | |
632 | f3fc6e2e | Paolo Bonzini | static void unix_rearm_timer(struct qemu_alarm_timer *t, |
633 | f3fc6e2e | Paolo Bonzini | int64_t nearest_delta_ns) |
634 | 84682834 | Paolo Bonzini | { |
635 | 84682834 | Paolo Bonzini | struct itimerval itv;
|
636 | 84682834 | Paolo Bonzini | int err;
|
637 | db1a4972 | Paolo Bonzini | |
638 | 84682834 | Paolo Bonzini | if (nearest_delta_ns < MIN_TIMER_REARM_NS)
|
639 | 84682834 | Paolo Bonzini | nearest_delta_ns = MIN_TIMER_REARM_NS; |
640 | 84682834 | Paolo Bonzini | |
641 | 84682834 | Paolo Bonzini | itv.it_interval.tv_sec = 0;
|
642 | 84682834 | Paolo Bonzini | itv.it_interval.tv_usec = 0; /* 0 for one-shot timer */ |
643 | 84682834 | Paolo Bonzini | itv.it_value.tv_sec = nearest_delta_ns / 1000000000;
|
644 | 84682834 | Paolo Bonzini | itv.it_value.tv_usec = (nearest_delta_ns % 1000000000) / 1000; |
645 | 84682834 | Paolo Bonzini | err = setitimer(ITIMER_REAL, &itv, NULL);
|
646 | 84682834 | Paolo Bonzini | if (err) {
|
647 | 84682834 | Paolo Bonzini | perror("setitimer");
|
648 | 84682834 | Paolo Bonzini | fprintf(stderr, "Internal timer error: aborting\n");
|
649 | 84682834 | Paolo Bonzini | exit(1);
|
650 | 84682834 | Paolo Bonzini | } |
651 | db1a4972 | Paolo Bonzini | } |
652 | db1a4972 | Paolo Bonzini | |
653 | db1a4972 | Paolo Bonzini | static void unix_stop_timer(struct qemu_alarm_timer *t) |
654 | db1a4972 | Paolo Bonzini | { |
655 | db1a4972 | Paolo Bonzini | struct itimerval itv;
|
656 | db1a4972 | Paolo Bonzini | |
657 | db1a4972 | Paolo Bonzini | memset(&itv, 0, sizeof(itv)); |
658 | db1a4972 | Paolo Bonzini | setitimer(ITIMER_REAL, &itv, NULL);
|
659 | db1a4972 | Paolo Bonzini | } |
660 | db1a4972 | Paolo Bonzini | |
661 | db1a4972 | Paolo Bonzini | #endif /* !defined(_WIN32) */ |
662 | db1a4972 | Paolo Bonzini | |
663 | db1a4972 | Paolo Bonzini | |
664 | db1a4972 | Paolo Bonzini | #ifdef _WIN32
|
665 | db1a4972 | Paolo Bonzini | |
666 | 2f9cba0c | Stefan Weil | static MMRESULT mm_timer;
|
667 | 2f9cba0c | Stefan Weil | static unsigned mm_period; |
668 | 2f9cba0c | Stefan Weil | |
669 | 2f9cba0c | Stefan Weil | static void CALLBACK mm_alarm_handler(UINT uTimerID, UINT uMsg, |
670 | 2f9cba0c | Stefan Weil | DWORD_PTR dwUser, DWORD_PTR dw1, |
671 | 2f9cba0c | Stefan Weil | DWORD_PTR dw2) |
672 | 2f9cba0c | Stefan Weil | { |
673 | 2f9cba0c | Stefan Weil | struct qemu_alarm_timer *t = alarm_timer;
|
674 | 2f9cba0c | Stefan Weil | if (!t) {
|
675 | 2f9cba0c | Stefan Weil | return;
|
676 | 2f9cba0c | Stefan Weil | } |
677 | 2f9cba0c | Stefan Weil | if (alarm_has_dynticks(t) || qemu_next_alarm_deadline() <= 0) { |
678 | 2f9cba0c | Stefan Weil | t->expired = alarm_has_dynticks(t); |
679 | 2f9cba0c | Stefan Weil | t->pending = 1;
|
680 | 2f9cba0c | Stefan Weil | qemu_notify_event(); |
681 | 2f9cba0c | Stefan Weil | } |
682 | 2f9cba0c | Stefan Weil | } |
683 | 2f9cba0c | Stefan Weil | |
684 | 2f9cba0c | Stefan Weil | static int mm_start_timer(struct qemu_alarm_timer *t) |
685 | 2f9cba0c | Stefan Weil | { |
686 | 2f9cba0c | Stefan Weil | TIMECAPS tc; |
687 | 2f9cba0c | Stefan Weil | UINT flags; |
688 | 2f9cba0c | Stefan Weil | |
689 | 2f9cba0c | Stefan Weil | memset(&tc, 0, sizeof(tc)); |
690 | 2f9cba0c | Stefan Weil | timeGetDevCaps(&tc, sizeof(tc));
|
691 | 2f9cba0c | Stefan Weil | |
692 | 2f9cba0c | Stefan Weil | mm_period = tc.wPeriodMin; |
693 | 2f9cba0c | Stefan Weil | timeBeginPeriod(mm_period); |
694 | 2f9cba0c | Stefan Weil | |
695 | 2f9cba0c | Stefan Weil | flags = TIME_CALLBACK_FUNCTION; |
696 | 2f9cba0c | Stefan Weil | if (alarm_has_dynticks(t)) {
|
697 | 2f9cba0c | Stefan Weil | flags |= TIME_ONESHOT; |
698 | 2f9cba0c | Stefan Weil | } else {
|
699 | 2f9cba0c | Stefan Weil | flags |= TIME_PERIODIC; |
700 | 2f9cba0c | Stefan Weil | } |
701 | 2f9cba0c | Stefan Weil | |
702 | 2f9cba0c | Stefan Weil | mm_timer = timeSetEvent(1, /* interval (ms) */ |
703 | 2f9cba0c | Stefan Weil | mm_period, /* resolution */
|
704 | 2f9cba0c | Stefan Weil | mm_alarm_handler, /* function */
|
705 | 2f9cba0c | Stefan Weil | (DWORD_PTR)t, /* parameter */
|
706 | 2f9cba0c | Stefan Weil | flags); |
707 | 2f9cba0c | Stefan Weil | |
708 | 2f9cba0c | Stefan Weil | if (!mm_timer) {
|
709 | 2f9cba0c | Stefan Weil | fprintf(stderr, "Failed to initialize win32 alarm timer: %ld\n",
|
710 | 2f9cba0c | Stefan Weil | GetLastError()); |
711 | 2f9cba0c | Stefan Weil | timeEndPeriod(mm_period); |
712 | 2f9cba0c | Stefan Weil | return -1; |
713 | 2f9cba0c | Stefan Weil | } |
714 | 2f9cba0c | Stefan Weil | |
715 | 2f9cba0c | Stefan Weil | return 0; |
716 | 2f9cba0c | Stefan Weil | } |
717 | 2f9cba0c | Stefan Weil | |
718 | 2f9cba0c | Stefan Weil | static void mm_stop_timer(struct qemu_alarm_timer *t) |
719 | 2f9cba0c | Stefan Weil | { |
720 | 2f9cba0c | Stefan Weil | timeKillEvent(mm_timer); |
721 | 2f9cba0c | Stefan Weil | timeEndPeriod(mm_period); |
722 | 2f9cba0c | Stefan Weil | } |
723 | 2f9cba0c | Stefan Weil | |
724 | f3fc6e2e | Paolo Bonzini | static void mm_rearm_timer(struct qemu_alarm_timer *t, int64_t delta) |
725 | 2f9cba0c | Stefan Weil | { |
726 | f3fc6e2e | Paolo Bonzini | int nearest_delta_ms = (delta + 999999) / 1000000; |
727 | 2f9cba0c | Stefan Weil | if (nearest_delta_ms < 1) { |
728 | 2f9cba0c | Stefan Weil | nearest_delta_ms = 1;
|
729 | 2f9cba0c | Stefan Weil | } |
730 | f3fc6e2e | Paolo Bonzini | |
731 | f3fc6e2e | Paolo Bonzini | timeKillEvent(mm_timer); |
732 | 2f9cba0c | Stefan Weil | mm_timer = timeSetEvent(nearest_delta_ms, |
733 | 2f9cba0c | Stefan Weil | mm_period, |
734 | 2f9cba0c | Stefan Weil | mm_alarm_handler, |
735 | 2f9cba0c | Stefan Weil | (DWORD_PTR)t, |
736 | 2f9cba0c | Stefan Weil | TIME_ONESHOT | TIME_CALLBACK_FUNCTION); |
737 | 2f9cba0c | Stefan Weil | |
738 | 2f9cba0c | Stefan Weil | if (!mm_timer) {
|
739 | 2f9cba0c | Stefan Weil | fprintf(stderr, "Failed to re-arm win32 alarm timer %ld\n",
|
740 | 2f9cba0c | Stefan Weil | GetLastError()); |
741 | 2f9cba0c | Stefan Weil | |
742 | 2f9cba0c | Stefan Weil | timeEndPeriod(mm_period); |
743 | 2f9cba0c | Stefan Weil | exit(1);
|
744 | 2f9cba0c | Stefan Weil | } |
745 | 2f9cba0c | Stefan Weil | } |
746 | 2f9cba0c | Stefan Weil | |
747 | db1a4972 | Paolo Bonzini | static int win32_start_timer(struct qemu_alarm_timer *t) |
748 | db1a4972 | Paolo Bonzini | { |
749 | 68c23e55 | Paolo Bonzini | HANDLE hTimer; |
750 | 68c23e55 | Paolo Bonzini | BOOLEAN success; |
751 | 68c23e55 | Paolo Bonzini | |
752 | 68c23e55 | Paolo Bonzini | /* If you call ChangeTimerQueueTimer on a one-shot timer (its period
|
753 | 68c23e55 | Paolo Bonzini | is zero) that has already expired, the timer is not updated. Since
|
754 | 68c23e55 | Paolo Bonzini | creating a new timer is relatively expensive, set a bogus one-hour
|
755 | 68c23e55 | Paolo Bonzini | interval in the dynticks case. */
|
756 | 68c23e55 | Paolo Bonzini | success = CreateTimerQueueTimer(&hTimer, |
757 | 68c23e55 | Paolo Bonzini | NULL,
|
758 | 68c23e55 | Paolo Bonzini | host_alarm_handler, |
759 | 68c23e55 | Paolo Bonzini | t, |
760 | 68c23e55 | Paolo Bonzini | 1,
|
761 | 68c23e55 | Paolo Bonzini | alarm_has_dynticks(t) ? 3600000 : 1, |
762 | 68c23e55 | Paolo Bonzini | WT_EXECUTEINTIMERTHREAD); |
763 | 68c23e55 | Paolo Bonzini | |
764 | 68c23e55 | Paolo Bonzini | if (!success) {
|
765 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Failed to initialize win32 alarm timer: %ld\n",
|
766 | db1a4972 | Paolo Bonzini | GetLastError()); |
767 | db1a4972 | Paolo Bonzini | return -1; |
768 | db1a4972 | Paolo Bonzini | } |
769 | db1a4972 | Paolo Bonzini | |
770 | cd0544ee | Stefan Weil | t->timer = hTimer; |
771 | db1a4972 | Paolo Bonzini | return 0; |
772 | db1a4972 | Paolo Bonzini | } |
773 | db1a4972 | Paolo Bonzini | |
774 | db1a4972 | Paolo Bonzini | static void win32_stop_timer(struct qemu_alarm_timer *t) |
775 | db1a4972 | Paolo Bonzini | { |
776 | cd0544ee | Stefan Weil | HANDLE hTimer = t->timer; |
777 | db1a4972 | Paolo Bonzini | |
778 | 68c23e55 | Paolo Bonzini | if (hTimer) {
|
779 | 68c23e55 | Paolo Bonzini | DeleteTimerQueueTimer(NULL, hTimer, NULL); |
780 | 68c23e55 | Paolo Bonzini | } |
781 | db1a4972 | Paolo Bonzini | } |
782 | db1a4972 | Paolo Bonzini | |
783 | f3fc6e2e | Paolo Bonzini | static void win32_rearm_timer(struct qemu_alarm_timer *t, |
784 | f3fc6e2e | Paolo Bonzini | int64_t nearest_delta_ns) |
785 | db1a4972 | Paolo Bonzini | { |
786 | cd0544ee | Stefan Weil | HANDLE hTimer = t->timer; |
787 | cfced5b2 | Paolo Bonzini | int nearest_delta_ms;
|
788 | 68c23e55 | Paolo Bonzini | BOOLEAN success; |
789 | db1a4972 | Paolo Bonzini | |
790 | f3fc6e2e | Paolo Bonzini | nearest_delta_ms = (nearest_delta_ns + 999999) / 1000000; |
791 | cfced5b2 | Paolo Bonzini | if (nearest_delta_ms < 1) { |
792 | cfced5b2 | Paolo Bonzini | nearest_delta_ms = 1;
|
793 | cfced5b2 | Paolo Bonzini | } |
794 | 68c23e55 | Paolo Bonzini | success = ChangeTimerQueueTimer(NULL,
|
795 | 68c23e55 | Paolo Bonzini | hTimer, |
796 | 68c23e55 | Paolo Bonzini | nearest_delta_ms, |
797 | 68c23e55 | Paolo Bonzini | 3600000);
|
798 | db1a4972 | Paolo Bonzini | |
799 | 68c23e55 | Paolo Bonzini | if (!success) {
|
800 | 68c23e55 | Paolo Bonzini | fprintf(stderr, "Failed to rearm win32 alarm timer: %ld\n",
|
801 | 68c23e55 | Paolo Bonzini | GetLastError()); |
802 | 68c23e55 | Paolo Bonzini | exit(-1);
|
803 | db1a4972 | Paolo Bonzini | } |
804 | 68c23e55 | Paolo Bonzini | |
805 | db1a4972 | Paolo Bonzini | } |
806 | db1a4972 | Paolo Bonzini | |
807 | db1a4972 | Paolo Bonzini | #endif /* _WIN32 */ |
808 | db1a4972 | Paolo Bonzini | |
809 | 1dfb4dd9 | Luiz Capitulino | static void alarm_timer_on_change_state_rearm(void *opaque, int running, |
810 | 1dfb4dd9 | Luiz Capitulino | RunState state) |
811 | db1a4972 | Paolo Bonzini | { |
812 | db1a4972 | Paolo Bonzini | if (running)
|
813 | db1a4972 | Paolo Bonzini | qemu_rearm_alarm_timer((struct qemu_alarm_timer *) opaque);
|
814 | db1a4972 | Paolo Bonzini | } |
815 | db1a4972 | Paolo Bonzini | |
816 | 4260a739 | Paolo Bonzini | static void quit_timers(void) |
817 | 4260a739 | Paolo Bonzini | { |
818 | 4260a739 | Paolo Bonzini | struct qemu_alarm_timer *t = alarm_timer;
|
819 | 4260a739 | Paolo Bonzini | alarm_timer = NULL;
|
820 | 4260a739 | Paolo Bonzini | t->stop(t); |
821 | 4260a739 | Paolo Bonzini | } |
822 | 4260a739 | Paolo Bonzini | |
823 | db1a4972 | Paolo Bonzini | int init_timer_alarm(void) |
824 | db1a4972 | Paolo Bonzini | { |
825 | db1a4972 | Paolo Bonzini | struct qemu_alarm_timer *t = NULL; |
826 | db1a4972 | Paolo Bonzini | int i, err = -1; |
827 | db1a4972 | Paolo Bonzini | |
828 | db1a4972 | Paolo Bonzini | for (i = 0; alarm_timers[i].name; i++) { |
829 | db1a4972 | Paolo Bonzini | t = &alarm_timers[i]; |
830 | db1a4972 | Paolo Bonzini | |
831 | db1a4972 | Paolo Bonzini | err = t->start(t); |
832 | db1a4972 | Paolo Bonzini | if (!err)
|
833 | db1a4972 | Paolo Bonzini | break;
|
834 | db1a4972 | Paolo Bonzini | } |
835 | db1a4972 | Paolo Bonzini | |
836 | db1a4972 | Paolo Bonzini | if (err) {
|
837 | db1a4972 | Paolo Bonzini | err = -ENOENT; |
838 | db1a4972 | Paolo Bonzini | goto fail;
|
839 | db1a4972 | Paolo Bonzini | } |
840 | db1a4972 | Paolo Bonzini | |
841 | db1a4972 | Paolo Bonzini | /* first event is at time 0 */
|
842 | 4260a739 | Paolo Bonzini | atexit(quit_timers); |
843 | db1a4972 | Paolo Bonzini | t->pending = 1;
|
844 | db1a4972 | Paolo Bonzini | alarm_timer = t; |
845 | db1a4972 | Paolo Bonzini | qemu_add_vm_change_state_handler(alarm_timer_on_change_state_rearm, t); |
846 | db1a4972 | Paolo Bonzini | |
847 | db1a4972 | Paolo Bonzini | return 0; |
848 | db1a4972 | Paolo Bonzini | |
849 | db1a4972 | Paolo Bonzini | fail:
|
850 | db1a4972 | Paolo Bonzini | return err;
|
851 | db1a4972 | Paolo Bonzini | } |
852 | db1a4972 | Paolo Bonzini | |
853 | db1a4972 | Paolo Bonzini | int qemu_calculate_timeout(void) |
854 | db1a4972 | Paolo Bonzini | { |
855 | 1ece93a9 | Paolo Bonzini | return 1000; |
856 | db1a4972 | Paolo Bonzini | } |