#define MIN_TIMER_REARM_US 250
static struct qemu_alarm_timer *alarm_timer;
+static int alarm_timer_rfd, alarm_timer_wfd;
#ifdef _WIN32
qemu_get_clock(vm_clock))) ||
qemu_timer_expired(active_timers[QEMU_TIMER_REALTIME],
qemu_get_clock(rt_clock))) {
+ CPUState *env = next_cpu;
+ static const char byte = 0;
+
#ifdef _WIN32
struct qemu_alarm_win32 *data = ((struct qemu_alarm_timer*)dwUser)->priv;
SetEvent(data->host_alarm);
#endif
- CPUState *env = next_cpu;
+ write(alarm_timer_wfd, &byte, sizeof(byte));
alarm_timer->flags |= ALARM_FLAG_EXPIRED;
if (env) {
{
struct qemu_alarm_timer *t = NULL;
int i, err = -1;
+ int fds[2];
+
+ if (pipe(fds) < 0) {
+ fail:
+ perror("creating timer pipe");
+ exit(1);
+ }
+ for (i = 0; i < 2; i++) {
+ int flags = fcntl(fds[i], F_GETFL);
+ if (flags == -1 || fcntl(fds[i], F_SETFL, flags | O_NONBLOCK))
+ goto fail;
+ }
+ alarm_timer_rfd = fds[0];
+ alarm_timer_wfd = fds[1];
for (i = 0; alarm_timers[i].name; i++) {
t = &alarm_timers[i];
/* poll any events */
/* XXX: separate device handlers from system ones */
- nfds = -1;
+ nfds = alarm_timer_rfd;
FD_ZERO(&rfds);
+ FD_SET(alarm_timer_rfd, &rfds);
FD_ZERO(&wfds);
FD_ZERO(&xfds);
for(ioh = first_io_handler; ioh != NULL; ioh = ioh->next) {
qemu_get_clock(rt_clock));
if (alarm_timer->flags & ALARM_FLAG_EXPIRED) {
+ char byte;
+ do {
+ ret = read(alarm_timer_rfd, &byte, sizeof(byte));
+ } while (ret != -1 || errno != EAGAIN);
+
alarm_timer->flags &= ~(ALARM_FLAG_EXPIRED);
qemu_rearm_alarm_timer(alarm_timer);
}