Help me with Echo Command Post: 302654243

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xconnectionwatchproc

XConnectionWatchProc(3X)					  XLIB FUNCTIONS					  XConnectionWatchProc(3X)

NAME

       XConnectionWatchProc - procedure called when internal connection opens or closes

SYNTAX

       typedef void (*XConnectionWatchProc)(display, client_data, fd, opening, watch_data)
	     Display *display;
	     XPointer client_data;
	     int fd;
	     Bool opening;
	     XPointer *watch_data;

ARGUMENTS

       display	 Specifies the connection to the X server.

       client_data
		 Specifies the additional client data.

       fd	 Specifies the file descriptor.

       opening	 Specifies whether the connections is being opened or closed.

       watch_data
		 Specifies a location for private watch_data.

DESCRIPTION

       XConnectionWatchProc is registered by XAddConnectionWatch() and is called each time Xlib opens or closed an internal connection for the
       specified display.

       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.

       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

       XAddConnectionWatch(3X)

X Version 11							     Release 6						  XConnectionWatchProc(3X)

10 More Discussions You Might Find Interesting

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