F.43 CtreeAsynchronous

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Deals with asynchronous threads launched by an application.

Short Name

CTASYNC

TYPE

Utility

DECLARATION

LONG CtreeAsynchronous(LONG handle, NINT mode, VRLEN bufsiz, pTEXT bufptr)

DESCRIPTION

CtreeAsynchronous deals with asynchronous threads (including flush threads) launched by an application. CtreeAsynchronous can be used to determine the status of an asynchronous thread or to cancel the thread.

handle is the handle value returned by a function that launches an asynchronous thread (e.g., CTFLUSHX).
mode is ctASYNC_STATUS or ctASYNC_CANCEL.

The bufsiz and bufptr parameters are ignored now. They are intended for future use if it is desirable to return information stored by an asynchronous thread.

At this point, only the thread that launched the asynchronous thread can call CtreeAsynchronous.

RETURN

Value	Symbolic Constant	Description
0	ctASYNC_completed	Thread completed successfully.
1	ctASYNC_cancelled	Thread cancelled.
2	ctASYNC_notfound	handle not found.
3	ctASYNC_badmode	mode is bad.
4	ctASYNC_running	Thread is running.
negative	negative value	Negative of c-tree error code that terminated the thread.

See Appendix A "c-tree Plus Error Codes" of the c-tree Plus Programmer's Reference Guide for a complete listing of valid c-tree Plus error values.