waitThread

waitThread ( integer ID1 [,integer ID2,… ] )

Use this function to pause execution of the script until one or several threads terminate. Used to synchronize a multithreading script.

Parameters

ID1, ID2, …

Positive integers specifying the IDs of the threads that must end in order for the function to return.

Error flags

ERR_OK

The flag set if successful.

ERR_FAILED

The flag set if failed.

Example

This set of statements continuously captures an image and performs its processing in three parallel threads. The waitThread function at the end of the loop waits for two additional threads to complete, preventing the script from starting a new cycle before the processing is finished.

do

grabim(0)

emphasize(0,1,10)

'next two functions are executed in

'separate threads

a=thread("Emboss(0,3,1)")

b=thread("Sobel(0,2,0)")

'wait for both threads to complete

waitThread(a,b)

loop