/* us and them, after all we're only ordinary seconds */
static void
rump_delay(unsigned int us)
{
uint64_t sec, nsec;
sec = us / 1000000;
nsec = (us % 1000000) * 1000;
if (__predict_false(sec != 0))
printf("WARNING: over 1s delay\n");
rumpuser_clock_sleep(RUMPUSER_CLOCK_RELWALL, sec, nsec);
}
/*
* This locking needs work and will misbehave severely if:
* 1) the backing memory has to be paged in
* 2) some lockholder exits while holding the lock
*/
static void
shmif_lockbus(struct shmif_mem *busmem)
{
int i = 0;
while (__predict_false(atomic_cas_32(&busmem->shm_lock,
LOCK_UNLOCKED, LOCK_LOCKED) == LOCK_LOCKED)) {
if (__predict_false(++i > LOCK_COOLDOWN)) {
/* wait 1ms */
rumpuser_clock_sleep(RUMPUSER_CLOCK_RELWALL,
0, 1000*1000);
i = 0;
}
continue;
}
membar_enter();
}
int
kpause(const char *wmesg, bool intr, int timeo, kmutex_t *mtx)
{
extern int hz;
int rv;
uint64_t sec, nsec;
if (mtx)
mutex_exit(mtx);
sec = timeo / hz;
nsec = (timeo % hz) * (1000000000 / hz);
rv = rumpuser_clock_sleep(RUMPUSER_CLOCK_RELWALL, sec, nsec);
KASSERT(rv == 0);
if (mtx)
mutex_enter(mtx);
return 0;
}
