void
CVMthreadBoostAndWait(CVMThreadID *self, CVMThreadBoostRecord *bp,
CVMThreadBoostQueue *b)
{
CVMBool destroy = CVM_FALSE;
assert(b->nboosters > 0);
#ifdef SOLARIS_BOOST_MUTEX
{
SOLARISBoostLock *l = b->thread_lock;
do {
mutex_lock(&l->lock);
mutex_unlock(&l->lock);
} while (b->boosting);
}
#else
sem_wait(&b->sem);
#endif
assert(!b->boosting);
mutex_lock(&b->lock);
assert(b->nboosters > 0);
assert((b->nboosters == 0) == (b->boosters.waiters == NULL));
--b->nboosters;
dequeue_me(&b->boosters, self);
assert((b->nboosters == 0) == (b->boosters.waiters == NULL));
/* Last to wakeup should have a missing boost record */
assert(b->boosters.waiters != NULL || self->boost == NULL);
if (self->boost == NULL) {
/* I need my record back */
if (b->boosters.waiters != NULL) {
/* Steal one */
self->boost = b->boosters.waiters->boost;
b->boosters.waiters->boost = NULL;
assert(self->boost != NULL);
} else {
self->boost = b;
}
}
assert(!b->boosting);
if (b->nboosters == 0) {
destroy = CVM_TRUE;
}
mutex_unlock(&b->lock);
if (destroy) {
if (b->thread_lock != NULL) {
boostLockRemoveReference(b);
}
}
}
int
sysMonitorWait(sys_thread_t *self, sys_mon_t *mid, jlong millis)
{
int ret = SYS_OK;
monitor_waiter_t me;
sysAssert(mid != SYS_MID_NULL);
if (self != mid->monitor_owner) {
return SYS_ERR;
}
if (sysThreadIsInterrupted(self, TRUE)) {
return SYS_INTRPT;
}
/* Prepare to wait: drop mutex ownership */
sysAssert(self->monitor_entry_count == 0);
sysAssert(self->mon_wait == 0);
self->mon_wait = (sys_mon_t *) mid;
self->monitor_entry_count = mid->entry_count;
mid->entry_count = 0;
mid->monitor_owner = SYS_THREAD_NULL;
/* Add myself to the monitor waitq */
enqueue_me(&me, &mid->mwait_queue, self);
if (millis == SYS_TIMEOUT_INFINITY) {
ret = condvarWait(&mid->cv_monitor, &mid->mutex, CONDVAR_WAIT);
} else {
ret = condvarTimedWait(&mid->cv_monitor, &mid->mutex, millis,
CONDVAR_WAIT);
}
dequeue_me(&me, &mid->mwait_queue);
sysAssert(mid->monitor_owner == NULL);
sysAssert(mid->entry_count == 0);
mid->monitor_owner = self;
mid->entry_count = self->monitor_entry_count;
self->monitor_entry_count = 0;
self->mon_wait = 0;
/* Did we get interrupted in mid-wait? (IS THIS THE RIGHT PLACE?) */
if (sysThreadIsInterrupted(self, TRUE)) {
return SYS_INTRPT;
}
return ret;
}