protected function buildLocksTab($owner_phid)
{
$locks = DrydockSlotLock::loadLocks($owner_phid);
$rows = array();
foreach ($locks as $lock) {
$rows[] = array($lock->getID(), $lock->getLockKey());
}
$table = id(new AphrontTableView($rows))->setNoDataString(pht('No slot locks held.'))->setHeaders(array(pht('ID'), pht('Lock Key')))->setColumnClasses(array(null, 'wide'));
return id(new PHUIPropertyListView())->addRawContent($table);
}
protected function getConcurrentResourceLimitSlotLock(DrydockBlueprint $blueprint)
{
$limit = $this->getConcurrentResourceLimit($blueprint);
if ($limit === null) {
return;
}
$blueprint_phid = $blueprint->getPHID();
// TODO: This logic shouldn't do anything awful, but is a little silly. It
// would be nice to unify the "huge limit" and "small limit" cases
// eventually but it's a little tricky.
// If the limit is huge, just pick a random slot. This is just stopping
// us from exploding if someone types a billion zillion into the box.
if ($limit > 1024) {
$slot = mt_rand(0, $limit - 1);
return "allocator({$blueprint_phid}).limit({$slot})";
}
// For reasonable limits, actually check for an available slot.
$locks = DrydockSlotLock::loadLocks($blueprint_phid);
$locks = mpull($locks, null, 'getLockKey');
$slots = range(0, $limit - 1);
shuffle($slots);
foreach ($slots as $slot) {
$slot_lock = "allocator({$blueprint_phid}).limit({$slot})";
if (empty($locks[$slot_lock])) {
return $slot_lock;
}
}
// If we found no free slot, just return whatever we checked last (which
// is just a random slot). There's a small chance we'll get lucky and the
// lock will be free by the time we try to take it, but usually we'll just
// fail to grab the lock, throw an appropriate lock exception, and get back
// on the right path to retry later.
return $slot_lock;
}
