Task Control and Worker Communication

Control task code execution and communication among workers during job and spmd block execution

Functions

`addAttachedFiles`	Attach files or folders to parallel pool
`labindex`	Index of the current worker in an `spmd` block
`numlabs`	Number of workers running current `spmd` block
`gcat`	Concatenate arrays on `spmd` workers
`gop`	Reduce arrays on `spmd` workers
`gplus`	Add arrays from workers in an `spmd` block
`labBarrier`	Synchronize workers in an `spmd` block
`labBroadcast`	Send data to all workers in an `spmd` block
`labProbe`	Determine if data is available for the current worker in an `spmd` to receive
`labReceive`	Receive data from another worker in an `spmd` block
`labSend`	Send data to another worker in an `spmd` block
`labSendReceive`	Simultaneously send and receive data on a worker in an `spmd` block
`getCurrentJob`	Get job object from a worker running a job
`getCurrentCluster`	Get cluster object from a worker in a cluster
`getCurrentTask`	Task object currently being evaluated in this worker session
`getCurrentWorker`	Get worker object from current worker
`getAttachedFilesFolder`	Identify folder on a worker where attached files are copied to
`updateAttachedFiles`	Update attached files or folders on parallel pool

`parallel.Task`	Access task properties and behaviors
`parallel.Worker`	Access worker that ran task