* THE SOFTWARE.
*/
-#include "sysemu.h"
-#include "net.h"
-#include "monitor.h"
-#include "console.h"
+#include "sysemu/sysemu.h"
+#include "monitor/monitor.h"
+#include "ui/console.h"
#include "hw/hw.h"
-#include "qemu-timer.h"
+#include "qemu/timer.h"
+#ifdef CONFIG_POSIX
+#include <pthread.h>
+#endif
#ifdef _WIN32
#include <mmsystem.h>
#endif
+#ifdef CONFIG_PPOLL
+#include <poll.h>
+#endif
+
+#ifdef CONFIG_PRCTL_PR_SET_TIMERSLACK
+#include <sys/prctl.h>
+#endif
+
/***********************************************************/
/* timers */
-#define QEMU_CLOCK_REALTIME 0
-#define QEMU_CLOCK_VIRTUAL 1
-#define QEMU_CLOCK_HOST 2
-
struct QEMUClock {
QEMUTimer *active_timers;
static struct qemu_alarm_timer *alarm_timer;
-static bool qemu_timer_expired_ns(QEMUTimer *timer_head, int64_t current_time)
+static bool timer_expired_ns(QEMUTimer *timer_head, int64_t current_time)
{
return timer_head && (timer_head->expire_time <= current_time);
}
QEMUClock *vm_clock;
QEMUClock *host_clock;
-static QEMUClock *qemu_new_clock(int type)
+static QEMUClock *qemu_clock_new(int type)
{
QEMUClock *clock;
/* To avoid problems with overflow limit this to 2^32. */
int64_t delta = INT32_MAX;
- if (clock->active_timers) {
+ if (clock->enabled && clock->active_timers) {
delta = clock->active_timers->expire_time - qemu_get_clock_ns(clock);
}
if (delta < 0) {
return delta;
}
+/*
+ * As above, but return -1 for no deadline, and do not cap to 2^32
+ * as we know the result is always positive.
+ */
+
+int64_t qemu_clock_deadline_ns(QEMUClock *clock)
+{
+ int64_t delta;
+
+ if (!clock->enabled || !clock->active_timers) {
+ return -1;
+ }
+
+ delta = clock->active_timers->expire_time - qemu_get_clock_ns(clock);
+
+ if (delta <= 0) {
+ return 0;
+ }
+
+ return delta;
+}
+
+/* Transition function to convert a nanosecond timeout to ms
+ * This is used where a system does not support ppoll
+ */
+int qemu_timeout_ns_to_ms(int64_t ns)
+{
+ int64_t ms;
+ if (ns < 0) {
+ return -1;
+ }
+
+ if (!ns) {
+ return 0;
+ }
+
+ /* Always round up, because it's better to wait too long than to wait too
+ * little and effectively busy-wait
+ */
+ ms = (ns + SCALE_MS - 1) / SCALE_MS;
+
+ /* To avoid overflow problems, limit this to 2^31, i.e. approx 25 days */
+ if (ms > (int64_t) INT32_MAX) {
+ ms = INT32_MAX;
+ }
+
+ return (int) ms;
+}
+
+
+/* qemu implementation of g_poll which uses a nanosecond timeout but is
+ * otherwise identical to g_poll
+ */
+int qemu_poll_ns(GPollFD *fds, guint nfds, int64_t timeout)
+{
+#ifdef CONFIG_PPOLL
+ if (timeout < 0) {
+ return ppoll((struct pollfd *)fds, nfds, NULL, NULL);
+ } else {
+ struct timespec ts;
+ ts.tv_sec = timeout / 1000000000LL;
+ ts.tv_nsec = timeout % 1000000000LL;
+ return ppoll((struct pollfd *)fds, nfds, &ts, NULL);
+ }
+#else
+ return g_poll(fds, nfds, qemu_timeout_ns_to_ms(timeout));
+#endif
+}
+
+
QEMUTimer *qemu_new_timer(QEMUClock *clock, int scale,
QEMUTimerCB *cb, void *opaque)
{
QEMUTimer **pt, *t;
/* NOTE: this code must be signal safe because
- qemu_timer_expired() can be called from a signal. */
+ timer_expired() can be called from a signal. */
pt = &ts->clock->active_timers;
for(;;) {
t = *pt;
/* add the timer in the sorted list */
/* NOTE: this code must be signal safe because
- qemu_timer_expired() can be called from a signal. */
+ timer_expired() can be called from a signal. */
pt = &ts->clock->active_timers;
for(;;) {
t = *pt;
- if (!qemu_timer_expired_ns(t, expire_time)) {
+ if (!timer_expired_ns(t, expire_time)) {
break;
}
pt = &t->next;
qemu_mod_timer_ns(ts, expire_time * ts->scale);
}
-bool qemu_timer_pending(QEMUTimer *ts)
+bool timer_pending(QEMUTimer *ts)
{
QEMUTimer *t;
for (t = ts->clock->active_timers; t != NULL; t = t->next) {
return false;
}
-bool qemu_timer_expired(QEMUTimer *timer_head, int64_t current_time)
+bool timer_expired(QEMUTimer *timer_head, int64_t current_time)
{
- return qemu_timer_expired_ns(timer_head, current_time * timer_head->scale);
+ return timer_expired_ns(timer_head, current_time * timer_head->scale);
}
void qemu_run_timers(QEMUClock *clock)
current_time = qemu_get_clock_ns(clock);
for(;;) {
ts = clock->active_timers;
- if (!qemu_timer_expired_ns(ts, current_time)) {
+ if (!timer_expired_ns(ts, current_time)) {
break;
}
/* remove timer from the list before calling the callback */
void init_clocks(void)
{
if (!rt_clock) {
- rt_clock = qemu_new_clock(QEMU_CLOCK_REALTIME);
- vm_clock = qemu_new_clock(QEMU_CLOCK_VIRTUAL);
- host_clock = qemu_new_clock(QEMU_CLOCK_HOST);
+ rt_clock = qemu_clock_new(QEMU_CLOCK_REALTIME);
+ vm_clock = qemu_clock_new(QEMU_CLOCK_VIRTUAL);
+ host_clock = qemu_clock_new(QEMU_CLOCK_HOST);
}
+#ifdef CONFIG_PRCTL_PR_SET_TIMERSLACK
+ prctl(PR_SET_TIMERSLACK, 1, 0, 0, 0);
+#endif
}
-uint64_t qemu_timer_expire_time_ns(QEMUTimer *ts)
+uint64_t timer_expire_time_ns(QEMUTimer *ts)
{
- return qemu_timer_pending(ts) ? ts->expire_time : -1;
+ return timer_pending(ts) ? ts->expire_time : -1;
}
void qemu_run_all_timers(void)
#if defined(__linux__)
-#include "compatfd.h"
+#include "qemu/compatfd.h"
static int dynticks_start_timer(struct qemu_alarm_timer *t)
{
static int mm_start_timer(struct qemu_alarm_timer *t)
{
timeGetDevCaps(&mm_tc, sizeof(mm_tc));
-
- timeBeginPeriod(mm_tc.wPeriodMin);
-
- mm_timer = timeSetEvent(mm_tc.wPeriodMin, /* interval (ms) */
- mm_tc.wPeriodMin, /* resolution */
- mm_alarm_handler, /* function */
- (DWORD_PTR)t, /* parameter */
- TIME_ONESHOT | TIME_CALLBACK_FUNCTION);
-
- if (!mm_timer) {
- fprintf(stderr, "Failed to initialize win32 alarm timer\n");
- timeEndPeriod(mm_tc.wPeriodMin);
- return -1;
- }
-
return 0;
}
static void mm_stop_timer(struct qemu_alarm_timer *t)
{
- timeKillEvent(mm_timer);
- timeEndPeriod(mm_tc.wPeriodMin);
+ if (mm_timer) {
+ timeKillEvent(mm_timer);
+ }
}
static void mm_rearm_timer(struct qemu_alarm_timer *t, int64_t delta)
nearest_delta_ms = mm_tc.wPeriodMax;
}
- timeKillEvent(mm_timer);
+ if (mm_timer) {
+ timeKillEvent(mm_timer);
+ }
mm_timer = timeSetEvent((UINT)nearest_delta_ms,
mm_tc.wPeriodMin,
mm_alarm_handler,
t->stop(t);
}
+#ifdef CONFIG_POSIX
+static void reinit_timers(void)
+{
+ struct qemu_alarm_timer *t = alarm_timer;
+ t->stop(t);
+ if (t->start(t)) {
+ fprintf(stderr, "Internal timer error: aborting\n");
+ exit(1);
+ }
+ qemu_rearm_alarm_timer(t);
+}
+#endif /* CONFIG_POSIX */
+
int init_timer_alarm(void)
{
struct qemu_alarm_timer *t = NULL;
}
atexit(quit_timers);
+#ifdef CONFIG_POSIX
+ pthread_atfork(NULL, NULL, reinit_timers);
+#endif
alarm_timer = t;
return 0;
projects / qemu.git / blobdiff