XAddConnectionWatch, XRemoveConnectionWatch, XProcessIn-
       ternalConnection, XInternalConnectionNumbers - handle Xlib
       internal connections


SYNTAX

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

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

       Status XRemoveConnectionWatch(display, procedure,
       client_data)
             Display *display;
             XWatchProc procedure;
             XPointer client_data;

       void XProcessInternalConnection(display, fd)
             Display *display;
             int fd;

       void XProcessInternalConnection(display, fd)
             Display *display;
             int fd;

       Status XInternalConnectionNumbers(display, fd_return,
       count_return)
             Display *display;
             int **fd_return;
             int *count_return;


ARGUMENTS

       client_data
                 Specifies the additional client data.

       count_return
                 Returns the number of file descriptors.

       display   Specifies the connection to the X server.

       fd        Specifies the file descriptor.

       fd_return Returns the file descriptors.

       this same private data pointer.

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

       The registered procedure should not call any Xlib func-
       tions.  If the procedure directly or indirectly causes the
       state of internal connections or watch procedures to
       change, the result is not defined.  If Xlib has been ini-
       tialized 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 dis-
       play using XLockDisplay.

       The XRemoveConnectionWatch function removes a previously
       registered connection watch procedure.  The client_data
       must match the client_data used when the procedure was
       initially registered.


       The XProcessInternalConnection function processes input
       available on an internal connection.  This function should
       be called for an internal connection only after an operat-
       ing system facility (for example, select or poll) has
       indicated that input is available; otherwise, the effect
       is not defined.

       The XProcessInternalConnection function processes input
       available on an internal connection.  This function should
       be called for an internal connection only after an operat-
       ing system facility (for example, select or poll) has
       indicated that input is available; otherwise, the effect
       is not defined.

       The XInternalConnectionNumbers function returns a list of
       the file descriptors for all internal connections cur-
       rently open for the specified display.  When the allocated
       list is no longer needed, free it by using XFree.  This
       functions returns a nonzero status if the list is success-
       fully allocated; otherwise, it returns zero.


SEE ALSO

       Xlib - C Language X Interface



X Version 11               Release 6.4                          1