/**
* Operations on the transferred data dispatch helper.
* @param GPhpThreadCriticalSection $inst The instance of the critical section to work with
* @param int $threadId The identifier of the thread whose critical section is currently dispatched.
* @return void
*/
private static function dataDispatch(&$inst, $threadId)
{
// {{{
$msg = $pid = $name = $value = null;
// Optimize the data receive timeout for each thread
// based on its:
// 2. priority
// 1. threads count for the current critical section
// 0. total critical sections count
$dataReceiveTimeoutMs = 700;
// default timeout
$dataReceiveTimeoutReducer = 2 - $inst->dispatchPriority;
$dataReceiveTimeoutReducer += count($inst->mastersThreadSpecificData) - 1;
$dataReceiveTimeoutReducer += count(self::$instancesCreatedEverAArr) * 2 - 1;
$dataReceiveTimeoutMs /= $dataReceiveTimeoutReducer;
$dataReceiveTimeoutMs = (int) $dataReceiveTimeoutMs;
if ($dataReceiveTimeoutMs == 0) {
$dataReceiveTimeoutMs = 1;
}
// Receive some data
if (!$inst->receive($msg, $pid, $name, $value, $dataReceiveTimeoutMs)) {
$inst->dispatchPriority = 0;
if ($inst->isIntercomBroken()) {
unset($inst->threadInstanceContext[$threadId]);
}
// remove the thread from the dispatching list as soon as we can
return;
}
switch ($msg) {
case GPhpThreadCriticalSection::$LOCKSYN:
$inst->dispatchPriority = 1;
if ($inst->ownerPid !== false && $inst->ownerPid != $pid && $inst->isPidAlive($inst->ownerPid)) {
$inst->send(GPhpThreadCriticalSection::$LOCKNACK, null, $pid);
return;
}
if (!$inst->send(GPhpThreadCriticalSection::$LOCKACK, null, $pid)) {
return;
}
$inst->ownerPid = $pid;
$inst->dispatchPriority = 2;
break;
case GPhpThreadCriticalSection::$UNLOCKSYN:
$inst->dispatchPriority = 1;
if ($inst->ownerPid === false) {
if (!$inst->send(GPhpThreadCriticalSection::$UNLOCKACK, null, $pid)) {
return;
}
}
$isOwnerAlive = $inst->isPidAlive($inst->ownerPid);
if (!$isOwnerAlive || $inst->ownerPid == $pid) {
if (!$isOwnerAlive) {
$inst->ownerPid = false;
}
if (!$inst->send(GPhpThreadCriticalSection::$UNLOCKACK, null, $pid)) {
return;
}
$inst->dispatchPriority = 0;
$inst->ownerPid = false;
} else {
$inst->send(GPhpThreadCriticalSection::$UNLOCKNACK, null, null);
}
break;
case GPhpThreadCriticalSection::$ADDORUPDATESYN:
$inst->dispatchPriority = 1;
if ($inst->ownerPid !== $pid) {
$inst->send(GPhpThreadCriticalSection::$ADDORUPDATENACK, null, null);
return;
}
if (!$inst->send(GPhpThreadCriticalSection::$ADDORUPDATEACK, $name, null)) {
return;
}
$inst->dispatchPriority = 2;
$inst->sharedData['rel'][$name] = $value;
break;
case GPhpThreadCriticalSection::$UNRELADDORUPDATESYN:
$inst->dispatchPriority = 1;
if (!$inst->send(GPhpThreadCriticalSection::$UNRELADDORUPDATEACK, $name, null)) {
return;
}
$inst->dispatchPriority = 2;
$inst->sharedData['unrel'][$name] = $value;
break;
case GPhpThreadCriticalSection::$ERASESYN:
$inst->dispatchPriority = 1;
if ($inst->ownerPid !== $pid) {
$inst->send(GPhpThreadCriticalSection::$ERASENACK, null, null);
continue;
}
if (!$inst->send(GPhpThreadCriticalSection::$ERASEACK, $name, null)) {
return;
}
$inst->dispatchPriority = 2;
unset($inst->sharedData['rel'][$name]);
break;
case GPhpThreadCriticalSection::$UNRELERASESYN:
$inst->dispatchPriority = 1;
if (!$inst->send(GPhpThreadCriticalSection::$ERASEACK, $name, null)) {
return;
}
$inst->dispatchPriority = 2;
unset($inst->sharedData['unrel'][$name]);
break;
case GPhpThreadCriticalSection::$READSYN:
$inst->dispatchPriority = 1;
if ($inst->ownerPid !== $pid) {
$inst->send(GPhpThreadCriticalSection::$READNACK, null, null);
return;
}
$inst->send(GPhpThreadCriticalSection::$READACK, $name, isset($inst->sharedData['rel'][$name]) || array_key_exists($name, $inst->sharedData['rel']) ? $inst->sharedData['rel'][$name] : null);
$inst->dispatchPriority = 2;
break;
case GPhpThreadCriticalSection::$UNRELREADSYN:
$inst->dispatchPriority = 1;
$inst->send(GPhpThreadCriticalSection::$UNRELREADACK, $name, isset($inst->sharedData['unrel'][$name]) || array_key_exists($name, $inst->sharedData['unrel']) ? $inst->sharedData['unrel'][$name] : null);
$inst->dispatchPriority = 2;
break;
case GPhpThreadCriticalSection::$READALLSYN:
$inst->dispatchPriority = 1;
if ($inst->ownerPid !== $pid) {
$inst->send(GPhpThreadCriticalSection::$READALLNACK, null, null);
return;
}
$inst->send(GPhpThreadCriticalSection::$READALLACK, null, $inst->sharedData);
$inst->dispatchPriority = 2;
break;
}
}
