CBL_THREAD_LIST_NEXT

Used in conjunction with CBL_THREAD_LIST_START and CBL_THREAD_LIST_END to obtain a list of all currently existing threads that the run-time system knows about. The CBL_THREAD_LIST_NEXT call takes returns the next item in the list of threads.

Syntax:

call "CBL_THREAD_LIST_NEXT" using by reference thread-id
                            by reference       thread-state
                            by reference       thread-iddata

Parameters:

	Using call prototype (see Key)	Picture
`thread-id`	cblt-pointer	usage pointer.
`thread-state`	cblt-x4-compx	pic x(4) comp-x.
`thread-iddata`	cblt-pointer	usage pointer.

On Entry:

None

On Exit:

thread-id

First thread identifier in this routine's internal list

thread-state

The state of the thread:

Bit 0

0	Detached
1	Not detached

Bit 1

0	Not suspended.
1	Suspended by CBL_THREAD_SUSPEND

Bit 2

0	Thread is not the main thread.
1	Thread is from a program in another language, and is known to the run-time system, or is the main thread

Bits 3-31

Undefined; could be any value

thread-iddata

A pointer to the thread's id-data, if that data area exists (otherwise NULL). id-data is specified by the routine CBL_THREAD_ALLOC_IDDATA.

return-code

A value indicating success or otherwise. See RETURN-CODE Values For Thread-control Routines

Comments:

Only information on existing threads, that is, threads that have not terminated, is returned. This routine will not return a thread-id for a thread that has terminated but has not been detached.

If thread-id is NULL then the first item in the list is returned (but there must have been a previous CBL_THREAD_LIST_START call).

Behavior is undefined if thread-id is invalid.