xsetafterfunction(3) [debian man page]

XSynchronize(3) 						  XLIB FUNCTIONS						   XSynchronize(3)

NAME

       XSynchronize, XSetAfterFunction - enable or disable synchronization

SYNTAX

       int (*XSynchronize(Display *display, Bool onoff))();

       int (*XSetAfterFunction(Display *display, int (*procedure)()))();

ARGUMENTS

       display	 Specifies the connection to the X server.

       procedure Specifies the procedure to be called.

       onoff	 Specifies a Boolean value that indicates whether to enable or disable synchronization.

DESCRIPTION

       The XSynchronize function returns the previous after function.  If onoff is True, XSynchronize turns on synchronous behavior.  If onoff is
       False, XSynchronize turns off synchronous behavior.

       The specified procedure is called with only a display pointer.  XSetAfterFunction returns the previous after function.

SEE ALSO

       XSetErrorHandler(3)
       Xlib - C Language X Interface

X Version 11							   libX11 1.5.0 						   XSynchronize(3)

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 indicating
       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
       immediately be called for each of them, before XAddConnectionWatch returns.  XAddConnectionWatch returns a nonzero status if the procedure
       is successfully 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), XProcessInternalConnection(3X), XInternalConnectionNumbers(3X)

X Version 11							     Release 6						   XAddConnectionWatch(3X)