setEventLock($value) 

Force sync mode on for a socket connection. This command has no effect on outbound socket connections that are not set to "async" in the dialplan, since these connections are already set to sync mode.

$value should be 1 to force sync mode, and 0 not to force it.

Specifically, calling setEventLock(1) operates by causing future calls to execute() to include the "event-lock: true" header in the message sent to the channel. Other event socket library routines are not affected by this call.