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Shell Programming and Scripting
[Solved] Output on one line
Post 302844411 by Junes on Monday 19th of August 2013 07:49:32 AM
08-19-2013
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xtappaddworkproc
XtAppAddWorkProc() XtAppAddWorkProc() XtAppAddWorkProc - register a procedure to be called when the event loop is idle. Synopsis XtWorkProcId XtAppAddWorkProc(app_context, proc, client_data) XtAppContext app_context; XtWorkProc proc; XtPointer client_data; Inputs app_context Specifies the application context. proc Specifies the procedure that is to be called when the application is idle. client_data Specifies data to be passed to proc when it is called. Returns A handle of type XtWorkProcId that can be passed to XtRemoveWorkProc() to unregister the work procedure. Description XtAddWorkProc() registers the procedure proc and the data client_data to be called by XtAppNextEvent() or XtAppProcessEvent() when there are no pending input events and it would otherwise block. Multiple work procedures can be registered, and the most recently added one is always the one that is called. However, if a work procedure itself adds another work procedure, the newly added one has lower priority than the current one. A work procedure returns a Boolean. If it returns True, it will automatically be unregistered and will not be called again. If it returns False it will be called the next time the application is idle. See XtWorkProc(2) for more information. Usage XtAppAddWorkProc() implements a limited form of background processing. Most applications spend most of their time waiting for input; to do useful work during this idle time, you can register a work procedure that will run when the application is idle. A work procedure must return quickly or the application will not be able to promptly respond to user events. If a large task needs to be done in the background, the work procedure should periodically save its state and return False. Work procedures should not be used to do frivolous work in the background. In a multi-tasking system, an idle application should generally actually be idle, and not steal CPU time from other processes. A work procedure can be explicitly removed by calling XtRemoveWorkProc() with the XtWorkProcId returned by this function. Structures The XtWorkProcId type is defined as follows: typedef unsigned long XtWorkProcId; See Also XtAppNextEvent(1), XtAppProcessEvent(1), XtRemoveWorkProc(1), XtWorkProc(2). Xt - Event Handling XtAppAddWorkProc()