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XAddConnectionWatch(3X)		XLIB FUNCTIONS	       XAddConnectionWatch(3X)

NAME
       XAddConnectionWatch - handle Xlib internal connections

SYNTAX
       Status XAddConnectionWatch(display, procedure, client_data)
	     Display *display;
	     XConnectionWatchProc procedure;
	     XPointer client_data;

ARGUMENTS
       display	 Specifies the connection to the X server.

       procedure Specifies the procedure to be called.

       client_data
		 Specifies the additional client data.

DESCRIPTION
       The XAddConnectionWatch function registers a procedure to be called
       each time Xlib opens or closes an internal connection for the specified
       display.	 The procedure is passed the display, the specified
       client_data, the file descriptor for the connection, a Boolean indicat‐
       ing whether the connection is being opened or closed, and a pointer to
       a location for private watch data.  If opening is True, the procedure
       can store a pointer to private data in the location pointed to by
       watch_data; when the procedure is later called for this same connection
       and opening is False, the location pointed to by watch_data will hold
       this same private data pointer.

       This function can be called at any time after a display is opened.  If
       internal connections already exist, the registered procedure will imme‐
       diately be called for each of them, before XAddConnectionWatch returns.
       XAddConnectionWatch returns a nonzero status if the procedure is suc‐
       cessfully registered; otherwise, it returns zero.

       The registered procedure should not call any Xlib functions.  If the
       procedure directly or indirectly causes the state of internal connec‐
       tions or watch procedures to change, the result is not defined.	If
       Xlib has been initialized for threads, the procedure is called with the
       display locked and the result of a call by the procedure to any Xlib
       function that locks the display is not defined unless the executing
       thread has externally locked the display using XLockDisplay.

SEE ALSO
       XConnectionWatchProc(3X), XRemoveConnectionWatch(3X), XProcessInternal‐
       Connection(3X), XInternalConnectionNumbers(3X)

X Version 11			   Release 6	       XAddConnectionWatch(3X)

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