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/*
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* QEMU System Emulator
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "sysemu.h" |
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#include "net.h" |
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#include "monitor.h" |
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#include "console.h" |
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#include "hw/hw.h" |
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#include <unistd.h> |
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#include <fcntl.h> |
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#include <time.h> |
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#include <errno.h> |
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#include <sys/time.h> |
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#include <signal.h> |
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#ifdef __FreeBSD__
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#include <sys/param.h> |
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#endif
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#ifdef _WIN32
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#include <windows.h> |
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#include <mmsystem.h> |
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#endif
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#include "qemu-timer.h" |
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/***********************************************************/
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/* timers */
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#define QEMU_CLOCK_REALTIME 0 |
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#define QEMU_CLOCK_VIRTUAL 1 |
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#define QEMU_CLOCK_HOST 2 |
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|
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struct QEMUClock {
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int type;
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int enabled;
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|
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QEMUTimer *active_timers; |
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|
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NotifierList reset_notifiers; |
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int64_t last; |
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}; |
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|
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struct QEMUTimer {
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QEMUClock *clock; |
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int64_t expire_time; /* in nanoseconds */
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int scale;
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QEMUTimerCB *cb; |
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void *opaque;
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struct QEMUTimer *next;
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}; |
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struct qemu_alarm_timer {
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char const *name; |
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int (*start)(struct qemu_alarm_timer *t); |
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void (*stop)(struct qemu_alarm_timer *t); |
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void (*rearm)(struct qemu_alarm_timer *t, int64_t nearest_delta_ns); |
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#if defined(__linux__)
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int fd;
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timer_t timer; |
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#elif defined(_WIN32)
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HANDLE timer; |
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#endif
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char expired;
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char pending;
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}; |
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static struct qemu_alarm_timer *alarm_timer; |
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static bool qemu_timer_expired_ns(QEMUTimer *timer_head, int64_t current_time) |
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{
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return timer_head && (timer_head->expire_time <= current_time);
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} |
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int qemu_alarm_pending(void) |
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{
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return alarm_timer->pending;
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} |
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|
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static inline int alarm_has_dynticks(struct qemu_alarm_timer *t) |
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{
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return !!t->rearm;
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} |
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static int64_t qemu_next_alarm_deadline(void) |
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{
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int64_t delta; |
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int64_t rtdelta; |
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if (!use_icount && vm_clock->active_timers) {
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delta = vm_clock->active_timers->expire_time - |
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qemu_get_clock_ns(vm_clock); |
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} else {
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delta = INT32_MAX; |
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} |
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if (host_clock->active_timers) {
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int64_t hdelta = host_clock->active_timers->expire_time - |
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qemu_get_clock_ns(host_clock); |
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if (hdelta < delta) {
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delta = hdelta; |
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} |
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} |
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if (rt_clock->active_timers) {
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rtdelta = (rt_clock->active_timers->expire_time - |
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qemu_get_clock_ns(rt_clock)); |
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if (rtdelta < delta) {
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delta = rtdelta; |
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} |
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} |
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return delta;
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} |
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static void qemu_rearm_alarm_timer(struct qemu_alarm_timer *t) |
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{
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int64_t nearest_delta_ns; |
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assert(alarm_has_dynticks(t)); |
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if (!rt_clock->active_timers &&
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!vm_clock->active_timers && |
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!host_clock->active_timers) {
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return;
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} |
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nearest_delta_ns = qemu_next_alarm_deadline(); |
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t->rearm(t, nearest_delta_ns); |
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} |
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/* TODO: MIN_TIMER_REARM_NS should be optimized */
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#define MIN_TIMER_REARM_NS 250000 |
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#ifdef _WIN32
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static int mm_start_timer(struct qemu_alarm_timer *t); |
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static void mm_stop_timer(struct qemu_alarm_timer *t); |
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static void mm_rearm_timer(struct qemu_alarm_timer *t, int64_t delta); |
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static int win32_start_timer(struct qemu_alarm_timer *t); |
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static void win32_stop_timer(struct qemu_alarm_timer *t); |
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static void win32_rearm_timer(struct qemu_alarm_timer *t, int64_t delta); |
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#else
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static int unix_start_timer(struct qemu_alarm_timer *t); |
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static void unix_stop_timer(struct qemu_alarm_timer *t); |
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static void unix_rearm_timer(struct qemu_alarm_timer *t, int64_t delta); |
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#ifdef __linux__
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static int dynticks_start_timer(struct qemu_alarm_timer *t); |
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static void dynticks_stop_timer(struct qemu_alarm_timer *t); |
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static void dynticks_rearm_timer(struct qemu_alarm_timer *t, int64_t delta); |
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#endif /* __linux__ */ |
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#endif /* _WIN32 */ |
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static struct qemu_alarm_timer alarm_timers[] = { |
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#ifndef _WIN32
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#ifdef __linux__
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{"dynticks", dynticks_start_timer,
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dynticks_stop_timer, dynticks_rearm_timer}, |
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#endif
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{"unix", unix_start_timer, unix_stop_timer, unix_rearm_timer},
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#else
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{"mmtimer", mm_start_timer, mm_stop_timer, NULL},
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{"mmtimer2", mm_start_timer, mm_stop_timer, mm_rearm_timer},
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{"dynticks", win32_start_timer, win32_stop_timer, win32_rearm_timer},
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{"win32", win32_start_timer, win32_stop_timer, NULL},
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#endif
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{NULL, }
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}; |
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static void show_available_alarms(void) |
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{
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int i;
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printf("Available alarm timers, in order of precedence:\n");
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for (i = 0; alarm_timers[i].name; i++) |
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printf("%s\n", alarm_timers[i].name);
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} |
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void configure_alarms(char const *opt) |
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{
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int i;
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int cur = 0; |
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int count = ARRAY_SIZE(alarm_timers) - 1; |
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char *arg;
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char *name;
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struct qemu_alarm_timer tmp;
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if (!strcmp(opt, "?")) { |
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show_available_alarms(); |
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exit(0);
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} |
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arg = g_strdup(opt); |
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/* Reorder the array */
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name = strtok(arg, ",");
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while (name) {
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for (i = 0; i < count && alarm_timers[i].name; i++) { |
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if (!strcmp(alarm_timers[i].name, name))
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break;
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} |
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if (i == count) {
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fprintf(stderr, "Unknown clock %s\n", name);
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goto next;
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} |
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if (i < cur)
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/* Ignore */
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goto next;
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/* Swap */
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tmp = alarm_timers[i]; |
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alarm_timers[i] = alarm_timers[cur]; |
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alarm_timers[cur] = tmp; |
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cur++; |
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next:
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name = strtok(NULL, ","); |
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} |
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g_free(arg); |
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if (cur) {
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/* Disable remaining timers */
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for (i = cur; i < count; i++)
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alarm_timers[i].name = NULL;
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} else {
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show_available_alarms(); |
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exit(1);
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} |
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} |
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|
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QEMUClock *rt_clock; |
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QEMUClock *vm_clock; |
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QEMUClock *host_clock; |
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static QEMUClock *qemu_new_clock(int type) |
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{
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QEMUClock *clock; |
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clock = g_malloc0(sizeof(QEMUClock));
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clock->type = type; |
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clock->enabled = 1;
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clock->last = INT64_MIN; |
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notifier_list_init(&clock->reset_notifiers); |
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return clock;
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} |
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void qemu_clock_enable(QEMUClock *clock, int enabled) |
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{
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bool old = clock->enabled;
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clock->enabled = enabled; |
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if (enabled && !old) {
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qemu_rearm_alarm_timer(alarm_timer); |
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} |
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} |
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int64_t qemu_clock_has_timers(QEMUClock *clock) |
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{
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return !!clock->active_timers;
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} |
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int64_t qemu_clock_expired(QEMUClock *clock) |
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{
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return (clock->active_timers &&
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clock->active_timers->expire_time < qemu_get_clock_ns(clock)); |
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} |
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int64_t qemu_clock_deadline(QEMUClock *clock) |
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{
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/* To avoid problems with overflow limit this to 2^32. */
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int64_t delta = INT32_MAX; |
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if (clock->active_timers) {
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delta = clock->active_timers->expire_time - qemu_get_clock_ns(clock); |
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} |
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if (delta < 0) { |
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delta = 0;
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} |
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return delta;
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} |
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QEMUTimer *qemu_new_timer(QEMUClock *clock, int scale,
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QEMUTimerCB *cb, void *opaque)
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{
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QEMUTimer *ts; |
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ts = g_malloc0(sizeof(QEMUTimer));
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ts->clock = clock; |
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ts->cb = cb; |
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ts->opaque = opaque; |
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ts->scale = scale; |
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return ts;
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} |
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void qemu_free_timer(QEMUTimer *ts)
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{
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g_free(ts); |
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} |
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|
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/* stop a timer, but do not dealloc it */
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void qemu_del_timer(QEMUTimer *ts)
|
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{
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QEMUTimer **pt, *t; |
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|
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/* NOTE: this code must be signal safe because
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qemu_timer_expired() can be called from a signal. */
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pt = &ts->clock->active_timers; |
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for(;;) {
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t = *pt; |
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if (!t)
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break;
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if (t == ts) {
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*pt = t->next; |
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break;
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} |
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pt = &t->next; |
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} |
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} |
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|
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/* modify the current timer so that it will be fired when current_time
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>= expire_time. The corresponding callback will be called. */
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void qemu_mod_timer_ns(QEMUTimer *ts, int64_t expire_time)
|
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{
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QEMUTimer **pt, *t; |
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|
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qemu_del_timer(ts); |
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|
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/* add the timer in the sorted list */
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/* NOTE: this code must be signal safe because
|
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qemu_timer_expired() can be called from a signal. */
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pt = &ts->clock->active_timers; |
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for(;;) {
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t = *pt; |
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if (!qemu_timer_expired_ns(t, expire_time)) {
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break;
|
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} |
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pt = &t->next; |
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} |
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ts->expire_time = expire_time; |
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ts->next = *pt; |
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*pt = ts; |
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|
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/* Rearm if necessary */
|
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if (pt == &ts->clock->active_timers) {
|
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if (!alarm_timer->pending) {
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qemu_rearm_alarm_timer(alarm_timer); |
| 373 |
} |
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/* Interrupt execution to force deadline recalculation. */
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qemu_clock_warp(ts->clock); |
| 376 |
if (use_icount) {
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qemu_notify_event(); |
| 378 |
} |
| 379 |
} |
| 380 |
} |
| 381 |
|
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void qemu_mod_timer(QEMUTimer *ts, int64_t expire_time)
|
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{
|
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qemu_mod_timer_ns(ts, expire_time * ts->scale); |
| 385 |
} |
| 386 |
|
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int qemu_timer_pending(QEMUTimer *ts)
|
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{
|
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QEMUTimer *t; |
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for (t = ts->clock->active_timers; t != NULL; t = t->next) { |
| 391 |
if (t == ts)
|
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return 1; |
| 393 |
} |
| 394 |
return 0; |
| 395 |
} |
| 396 |
|
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int qemu_timer_expired(QEMUTimer *timer_head, int64_t current_time)
|
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{
|
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return qemu_timer_expired_ns(timer_head, current_time * timer_head->scale);
|
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} |
| 401 |
|
| 402 |
static void qemu_run_timers(QEMUClock *clock) |
| 403 |
{
|
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QEMUTimer **ptimer_head, *ts; |
| 405 |
int64_t current_time; |
| 406 |
|
| 407 |
if (!clock->enabled)
|
| 408 |
return;
|
| 409 |
|
| 410 |
current_time = qemu_get_clock_ns(clock); |
| 411 |
ptimer_head = &clock->active_timers; |
| 412 |
for(;;) {
|
| 413 |
ts = *ptimer_head; |
| 414 |
if (!qemu_timer_expired_ns(ts, current_time)) {
|
| 415 |
break;
|
| 416 |
} |
| 417 |
/* remove timer from the list before calling the callback */
|
| 418 |
*ptimer_head = ts->next; |
| 419 |
ts->next = NULL;
|
| 420 |
|
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/* run the callback (the timer list can be modified) */
|
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ts->cb(ts->opaque); |
| 423 |
} |
| 424 |
} |
| 425 |
|
| 426 |
int64_t qemu_get_clock_ns(QEMUClock *clock) |
| 427 |
{
|
| 428 |
int64_t now, last; |
| 429 |
|
| 430 |
switch(clock->type) {
|
| 431 |
case QEMU_CLOCK_REALTIME:
|
| 432 |
return get_clock();
|
| 433 |
default:
|
| 434 |
case QEMU_CLOCK_VIRTUAL:
|
| 435 |
if (use_icount) {
|
| 436 |
return cpu_get_icount();
|
| 437 |
} else {
|
| 438 |
return cpu_get_clock();
|
| 439 |
} |
| 440 |
case QEMU_CLOCK_HOST:
|
| 441 |
now = get_clock_realtime(); |
| 442 |
last = clock->last; |
| 443 |
clock->last = now; |
| 444 |
if (now < last) {
|
| 445 |
notifier_list_notify(&clock->reset_notifiers, &now); |
| 446 |
} |
| 447 |
return now;
|
| 448 |
} |
| 449 |
} |
| 450 |
|
| 451 |
void qemu_register_clock_reset_notifier(QEMUClock *clock, Notifier *notifier)
|
| 452 |
{
|
| 453 |
notifier_list_add(&clock->reset_notifiers, notifier); |
| 454 |
} |
| 455 |
|
| 456 |
void qemu_unregister_clock_reset_notifier(QEMUClock *clock, Notifier *notifier)
|
| 457 |
{
|
| 458 |
notifier_list_remove(&clock->reset_notifiers, notifier); |
| 459 |
} |
| 460 |
|
| 461 |
void init_clocks(void) |
| 462 |
{
|
| 463 |
rt_clock = qemu_new_clock(QEMU_CLOCK_REALTIME); |
| 464 |
vm_clock = qemu_new_clock(QEMU_CLOCK_VIRTUAL); |
| 465 |
host_clock = qemu_new_clock(QEMU_CLOCK_HOST); |
| 466 |
} |
| 467 |
|
| 468 |
uint64_t qemu_timer_expire_time_ns(QEMUTimer *ts) |
| 469 |
{
|
| 470 |
return qemu_timer_pending(ts) ? ts->expire_time : -1; |
| 471 |
} |
| 472 |
|
| 473 |
void qemu_run_all_timers(void) |
| 474 |
{
|
| 475 |
alarm_timer->pending = 0;
|
| 476 |
|
| 477 |
/* rearm timer, if not periodic */
|
| 478 |
if (alarm_timer->expired) {
|
| 479 |
alarm_timer->expired = 0;
|
| 480 |
qemu_rearm_alarm_timer(alarm_timer); |
| 481 |
} |
| 482 |
|
| 483 |
/* vm time timers */
|
| 484 |
qemu_run_timers(vm_clock); |
| 485 |
qemu_run_timers(rt_clock); |
| 486 |
qemu_run_timers(host_clock); |
| 487 |
} |
| 488 |
|
| 489 |
#ifdef _WIN32
|
| 490 |
static void CALLBACK host_alarm_handler(PVOID lpParam, BOOLEAN unused) |
| 491 |
#else
|
| 492 |
static void host_alarm_handler(int host_signum) |
| 493 |
#endif
|
| 494 |
{
|
| 495 |
struct qemu_alarm_timer *t = alarm_timer;
|
| 496 |
if (!t)
|
| 497 |
return;
|
| 498 |
|
| 499 |
#if 0
|
| 500 |
#define DISP_FREQ 1000
|
| 501 |
{
|
| 502 |
static int64_t delta_min = INT64_MAX;
|
| 503 |
static int64_t delta_max, delta_cum, last_clock, delta, ti;
|
| 504 |
static int count;
|
| 505 |
ti = qemu_get_clock_ns(vm_clock);
|
| 506 |
if (last_clock != 0) {
|
| 507 |
delta = ti - last_clock;
|
| 508 |
if (delta < delta_min)
|
| 509 |
delta_min = delta;
|
| 510 |
if (delta > delta_max)
|
| 511 |
delta_max = delta;
|
| 512 |
delta_cum += delta;
|
| 513 |
if (++count == DISP_FREQ) {
|
| 514 |
printf("timer: min=%" PRId64 " us max=%" PRId64 " us avg=%" PRId64 " us avg_freq=%0.3f Hz\n",
|
| 515 |
muldiv64(delta_min, 1000000, get_ticks_per_sec()),
|
| 516 |
muldiv64(delta_max, 1000000, get_ticks_per_sec()),
|
| 517 |
muldiv64(delta_cum, 1000000 / DISP_FREQ, get_ticks_per_sec()),
|
| 518 |
(double)get_ticks_per_sec() / ((double)delta_cum / DISP_FREQ));
|
| 519 |
count = 0;
|
| 520 |
delta_min = INT64_MAX;
|
| 521 |
delta_max = 0;
|
| 522 |
delta_cum = 0;
|
| 523 |
}
|
| 524 |
}
|
| 525 |
last_clock = ti;
|
| 526 |
}
|
| 527 |
#endif
|
| 528 |
if (alarm_has_dynticks(t) ||
|
| 529 |
qemu_next_alarm_deadline () <= 0) {
|
| 530 |
t->expired = alarm_has_dynticks(t); |
| 531 |
t->pending = 1;
|
| 532 |
qemu_notify_event(); |
| 533 |
} |
| 534 |
} |
| 535 |
|
| 536 |
#if defined(__linux__)
|
| 537 |
|
| 538 |
#include "compatfd.h" |
| 539 |
|
| 540 |
static int dynticks_start_timer(struct qemu_alarm_timer *t) |
| 541 |
{
|
| 542 |
struct sigevent ev;
|
| 543 |
timer_t host_timer; |
| 544 |
struct sigaction act;
|
| 545 |
|
| 546 |
sigfillset(&act.sa_mask); |
| 547 |
act.sa_flags = 0;
|
| 548 |
act.sa_handler = host_alarm_handler; |
| 549 |
|
| 550 |
sigaction(SIGALRM, &act, NULL);
|
| 551 |
|
| 552 |
/*
|
| 553 |
* Initialize ev struct to 0 to avoid valgrind complaining
|
| 554 |
* about uninitialized data in timer_create call
|
| 555 |
*/
|
| 556 |
memset(&ev, 0, sizeof(ev)); |
| 557 |
ev.sigev_value.sival_int = 0;
|
| 558 |
ev.sigev_notify = SIGEV_SIGNAL; |
| 559 |
#ifdef SIGEV_THREAD_ID
|
| 560 |
if (qemu_signalfd_available()) {
|
| 561 |
ev.sigev_notify = SIGEV_THREAD_ID; |
| 562 |
ev._sigev_un._tid = qemu_get_thread_id(); |
| 563 |
} |
| 564 |
#endif /* SIGEV_THREAD_ID */ |
| 565 |
ev.sigev_signo = SIGALRM; |
| 566 |
|
| 567 |
if (timer_create(CLOCK_REALTIME, &ev, &host_timer)) {
|
| 568 |
perror("timer_create");
|
| 569 |
|
| 570 |
/* disable dynticks */
|
| 571 |
fprintf(stderr, "Dynamic Ticks disabled\n");
|
| 572 |
|
| 573 |
return -1; |
| 574 |
} |
| 575 |
|
| 576 |
t->timer = host_timer; |
| 577 |
|
| 578 |
return 0; |
| 579 |
} |
| 580 |
|
| 581 |
static void dynticks_stop_timer(struct qemu_alarm_timer *t) |
| 582 |
{
|
| 583 |
timer_t host_timer = t->timer; |
| 584 |
|
| 585 |
timer_delete(host_timer); |
| 586 |
} |
| 587 |
|
| 588 |
static void dynticks_rearm_timer(struct qemu_alarm_timer *t, |
| 589 |
int64_t nearest_delta_ns) |
| 590 |
{
|
| 591 |
timer_t host_timer = t->timer; |
| 592 |
struct itimerspec timeout;
|
| 593 |
int64_t current_ns; |
| 594 |
|
| 595 |
if (nearest_delta_ns < MIN_TIMER_REARM_NS)
|
| 596 |
nearest_delta_ns = MIN_TIMER_REARM_NS; |
| 597 |
|
| 598 |
/* check whether a timer is already running */
|
| 599 |
if (timer_gettime(host_timer, &timeout)) {
|
| 600 |
perror("gettime");
|
| 601 |
fprintf(stderr, "Internal timer error: aborting\n");
|
| 602 |
exit(1);
|
| 603 |
} |
| 604 |
current_ns = timeout.it_value.tv_sec * 1000000000LL + timeout.it_value.tv_nsec;
|
| 605 |
if (current_ns && current_ns <= nearest_delta_ns)
|
| 606 |
return;
|
| 607 |
|
| 608 |
timeout.it_interval.tv_sec = 0;
|
| 609 |
timeout.it_interval.tv_nsec = 0; /* 0 for one-shot timer */ |
| 610 |
timeout.it_value.tv_sec = nearest_delta_ns / 1000000000;
|
| 611 |
timeout.it_value.tv_nsec = nearest_delta_ns % 1000000000;
|
| 612 |
if (timer_settime(host_timer, 0 /* RELATIVE */, &timeout, NULL)) { |
| 613 |
perror("settime");
|
| 614 |
fprintf(stderr, "Internal timer error: aborting\n");
|
| 615 |
exit(1);
|
| 616 |
} |
| 617 |
} |
| 618 |
|
| 619 |
#endif /* defined(__linux__) */ |
| 620 |
|
| 621 |
#if !defined(_WIN32)
|
| 622 |
|
| 623 |
static int unix_start_timer(struct qemu_alarm_timer *t) |
| 624 |
{
|
| 625 |
struct sigaction act;
|
| 626 |
|
| 627 |
/* timer signal */
|
| 628 |
sigfillset(&act.sa_mask); |
| 629 |
act.sa_flags = 0;
|
| 630 |
act.sa_handler = host_alarm_handler; |
| 631 |
|
| 632 |
sigaction(SIGALRM, &act, NULL);
|
| 633 |
return 0; |
| 634 |
} |
| 635 |
|
| 636 |
static void unix_rearm_timer(struct qemu_alarm_timer *t, |
| 637 |
int64_t nearest_delta_ns) |
| 638 |
{
|
| 639 |
struct itimerval itv;
|
| 640 |
int err;
|
| 641 |
|
| 642 |
if (nearest_delta_ns < MIN_TIMER_REARM_NS)
|
| 643 |
nearest_delta_ns = MIN_TIMER_REARM_NS; |
| 644 |
|
| 645 |
itv.it_interval.tv_sec = 0;
|
| 646 |
itv.it_interval.tv_usec = 0; /* 0 for one-shot timer */ |
| 647 |
itv.it_value.tv_sec = nearest_delta_ns / 1000000000;
|
| 648 |
itv.it_value.tv_usec = (nearest_delta_ns % 1000000000) / 1000; |
| 649 |
err = setitimer(ITIMER_REAL, &itv, NULL);
|
| 650 |
if (err) {
|
| 651 |
perror("setitimer");
|
| 652 |
fprintf(stderr, "Internal timer error: aborting\n");
|
| 653 |
exit(1);
|
| 654 |
} |
| 655 |
} |
| 656 |
|
| 657 |
static void unix_stop_timer(struct qemu_alarm_timer *t) |
| 658 |
{
|
| 659 |
struct itimerval itv;
|
| 660 |
|
| 661 |
memset(&itv, 0, sizeof(itv)); |
| 662 |
setitimer(ITIMER_REAL, &itv, NULL);
|
| 663 |
} |
| 664 |
|
| 665 |
#endif /* !defined(_WIN32) */ |
| 666 |
|
| 667 |
|
| 668 |
#ifdef _WIN32
|
| 669 |
|
| 670 |
static MMRESULT mm_timer;
|
| 671 |
static unsigned mm_period; |
| 672 |
|
| 673 |
static void CALLBACK mm_alarm_handler(UINT uTimerID, UINT uMsg, |
| 674 |
DWORD_PTR dwUser, DWORD_PTR dw1, |
| 675 |
DWORD_PTR dw2) |
| 676 |
{
|
| 677 |
struct qemu_alarm_timer *t = alarm_timer;
|
| 678 |
if (!t) {
|
| 679 |
return;
|
| 680 |
} |
| 681 |
if (alarm_has_dynticks(t) || qemu_next_alarm_deadline() <= 0) { |
| 682 |
t->expired = alarm_has_dynticks(t); |
| 683 |
t->pending = 1;
|
| 684 |
qemu_notify_event(); |
| 685 |
} |
| 686 |
} |
| 687 |
|
| 688 |
static int mm_start_timer(struct qemu_alarm_timer *t) |
| 689 |
{
|
| 690 |
TIMECAPS tc; |
| 691 |
UINT flags; |
| 692 |
|
| 693 |
memset(&tc, 0, sizeof(tc)); |
| 694 |
timeGetDevCaps(&tc, sizeof(tc));
|
| 695 |
|
| 696 |
mm_period = tc.wPeriodMin; |
| 697 |
timeBeginPeriod(mm_period); |
| 698 |
|
| 699 |
flags = TIME_CALLBACK_FUNCTION; |
| 700 |
if (alarm_has_dynticks(t)) {
|
| 701 |
flags |= TIME_ONESHOT; |
| 702 |
} else {
|
| 703 |
flags |= TIME_PERIODIC; |
| 704 |
} |
| 705 |
|
| 706 |
mm_timer = timeSetEvent(1, /* interval (ms) */ |
| 707 |
mm_period, /* resolution */
|
| 708 |
mm_alarm_handler, /* function */
|
| 709 |
(DWORD_PTR)t, /* parameter */
|
| 710 |
flags); |
| 711 |
|
| 712 |
if (!mm_timer) {
|
| 713 |
fprintf(stderr, "Failed to initialize win32 alarm timer: %ld\n",
|
| 714 |
GetLastError()); |
| 715 |
timeEndPeriod(mm_period); |
| 716 |
return -1; |
| 717 |
} |
| 718 |
|
| 719 |
return 0; |
| 720 |
} |
| 721 |
|
| 722 |
static void mm_stop_timer(struct qemu_alarm_timer *t) |
| 723 |
{
|
| 724 |
timeKillEvent(mm_timer); |
| 725 |
timeEndPeriod(mm_period); |
| 726 |
} |
| 727 |
|
| 728 |
static void mm_rearm_timer(struct qemu_alarm_timer *t, int64_t delta) |
| 729 |
{
|
| 730 |
int nearest_delta_ms = (delta + 999999) / 1000000; |
| 731 |
if (nearest_delta_ms < 1) { |
| 732 |
nearest_delta_ms = 1;
|
| 733 |
} |
| 734 |
|
| 735 |
timeKillEvent(mm_timer); |
| 736 |
mm_timer = timeSetEvent(nearest_delta_ms, |
| 737 |
mm_period, |
| 738 |
mm_alarm_handler, |
| 739 |
(DWORD_PTR)t, |
| 740 |
TIME_ONESHOT | TIME_CALLBACK_FUNCTION); |
| 741 |
|
| 742 |
if (!mm_timer) {
|
| 743 |
fprintf(stderr, "Failed to re-arm win32 alarm timer %ld\n",
|
| 744 |
GetLastError()); |
| 745 |
|
| 746 |
timeEndPeriod(mm_period); |
| 747 |
exit(1);
|
| 748 |
} |
| 749 |
} |
| 750 |
|
| 751 |
static int win32_start_timer(struct qemu_alarm_timer *t) |
| 752 |
{
|
| 753 |
HANDLE hTimer; |
| 754 |
BOOLEAN success; |
| 755 |
|
| 756 |
/* If you call ChangeTimerQueueTimer on a one-shot timer (its period
|
| 757 |
is zero) that has already expired, the timer is not updated. Since
|
| 758 |
creating a new timer is relatively expensive, set a bogus one-hour
|
| 759 |
interval in the dynticks case. */
|
| 760 |
success = CreateTimerQueueTimer(&hTimer, |
| 761 |
NULL,
|
| 762 |
host_alarm_handler, |
| 763 |
t, |
| 764 |
1,
|
| 765 |
alarm_has_dynticks(t) ? 3600000 : 1, |
| 766 |
WT_EXECUTEINTIMERTHREAD); |
| 767 |
|
| 768 |
if (!success) {
|
| 769 |
fprintf(stderr, "Failed to initialize win32 alarm timer: %ld\n",
|
| 770 |
GetLastError()); |
| 771 |
return -1; |
| 772 |
} |
| 773 |
|
| 774 |
t->timer = hTimer; |
| 775 |
return 0; |
| 776 |
} |
| 777 |
|
| 778 |
static void win32_stop_timer(struct qemu_alarm_timer *t) |
| 779 |
{
|
| 780 |
HANDLE hTimer = t->timer; |
| 781 |
|
| 782 |
if (hTimer) {
|
| 783 |
DeleteTimerQueueTimer(NULL, hTimer, NULL); |
| 784 |
} |
| 785 |
} |
| 786 |
|
| 787 |
static void win32_rearm_timer(struct qemu_alarm_timer *t, |
| 788 |
int64_t nearest_delta_ns) |
| 789 |
{
|
| 790 |
HANDLE hTimer = t->timer; |
| 791 |
int nearest_delta_ms;
|
| 792 |
BOOLEAN success; |
| 793 |
|
| 794 |
nearest_delta_ms = (nearest_delta_ns + 999999) / 1000000; |
| 795 |
if (nearest_delta_ms < 1) { |
| 796 |
nearest_delta_ms = 1;
|
| 797 |
} |
| 798 |
success = ChangeTimerQueueTimer(NULL,
|
| 799 |
hTimer, |
| 800 |
nearest_delta_ms, |
| 801 |
3600000);
|
| 802 |
|
| 803 |
if (!success) {
|
| 804 |
fprintf(stderr, "Failed to rearm win32 alarm timer: %ld\n",
|
| 805 |
GetLastError()); |
| 806 |
exit(-1);
|
| 807 |
} |
| 808 |
|
| 809 |
} |
| 810 |
|
| 811 |
#endif /* _WIN32 */ |
| 812 |
|
| 813 |
static void quit_timers(void) |
| 814 |
{
|
| 815 |
struct qemu_alarm_timer *t = alarm_timer;
|
| 816 |
alarm_timer = NULL;
|
| 817 |
t->stop(t); |
| 818 |
} |
| 819 |
|
| 820 |
int init_timer_alarm(void) |
| 821 |
{
|
| 822 |
struct qemu_alarm_timer *t = NULL; |
| 823 |
int i, err = -1; |
| 824 |
|
| 825 |
for (i = 0; alarm_timers[i].name; i++) { |
| 826 |
t = &alarm_timers[i]; |
| 827 |
|
| 828 |
err = t->start(t); |
| 829 |
if (!err)
|
| 830 |
break;
|
| 831 |
} |
| 832 |
|
| 833 |
if (err) {
|
| 834 |
err = -ENOENT; |
| 835 |
goto fail;
|
| 836 |
} |
| 837 |
|
| 838 |
/* first event is at time 0 */
|
| 839 |
atexit(quit_timers); |
| 840 |
t->pending = 1;
|
| 841 |
alarm_timer = t; |
| 842 |
|
| 843 |
return 0; |
| 844 |
|
| 845 |
fail:
|
| 846 |
return err;
|
| 847 |
} |
| 848 |
|
| 849 |
int qemu_calculate_timeout(void) |
| 850 |
{
|
| 851 |
return 1000; |
| 852 |
} |
| 853 |
|