osf1 man page for xpending

XFlush(3X11)															      XFlush(3X11)

NAME
       XFlush, XSync, XEventsQueued, XPending - handle output buffer or event queue

SYNOPSIS
       XFlush(display)
	       Display *display;

       XSync(display, discard)
	       Display *display;
	       Bool discard;

       int XEventsQueued(display, mode)
	       Display *display;
	       int mode;

       int XPending(display)
	       Display *display;

ARGUMENTS
       Specifies  a  Boolean value that indicates whether XSync discards all events on the event queue.  Specifies the connection to the X server.
       Specifies the mode. You can pass QueuedAlready, QueuedAfterFlush, or QueuedAfterReading.

DESCRIPTION
       The XFlush function flushes the output buffer. Most client applications need not use this function because the output buffer  is  automati-
       cally  flushed  as  needed  by  calls  to  XPending,  XNextEvent, and XWindowEvent. Events generated by the server may be enqueued into the
       library's event queue.

       The XSync function flushes the output buffer and then waits until all requests have been received and  processed  by  the  X  server.   Any
       errors generated must be handled by the error handler. For each protocol error received by Xlib, XSync calls the client application's error
       handling routine (see section 11.8.2). Any events generated by the server are enqueued into the library's event queue.

       Finally, if you passed False, XSync does not discard the events in the queue. If you passed True, XSync discards all events in  the  queue,
       including those events that were on the queue before XSync was called. Client applications seldom need to call XSync.

       If mode is QueuedAlready, XEventsQueued returns the number of events already in the event queue (and never performs a system call). If mode
       is QueuedAfterFlush, XEventsQueued returns the number of events already in the queue if the number is nonzero. If there are  no	events	in
       the  queue, XEventsQueued flushes the output buffer, attempts to read more events out of the application's connection, and returns the num-
       ber read. If mode is QueuedAfterReading, XEventsQueued returns the number of events already in the queue if the number is nonzero. If there
       are no events in the queue, XEventsQueued attempts to read more events out of the application's connection without flushing the output buf-
       fer and returns the number read.

       XEventsQueued always returns immediately without I/O if there are events already in the queue.  XEventsQueued with mode QueuedAfterFlush is
       identical in behavior to XPending.  XEventsQueued with mode QueuedAlready is identical to the XQLength function.

       The  XPending  function	returns  the  number  of events that have been received from the X server but have not been removed from the event
       queue.  XPending is identical to XEventsQueued with the mode QueuedAfterFlush specified.

SEE ALSO
       AllPlanes(3X11), XIfEvent(3X11), XNextEvent(3X11), XPutBackEvent(3X11)

       Xlib -- C Language X Interface

																      XFlush(3X11)