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NAME
     Tk_FreeXId - make X resource identifier available for reuse

SYNOPSIS
     #include <tk.h>

     Tk_FreeXId(display, id)

ARGUMENTS
     Display   *display   (in)      Display  for  which  id   was
                                    allocated.

     XID       id         (in)      Identifier  of   X   resource
                                    (window,  font,  pixmap, cur-
                                    sor,  graphics  context,   or
                                    colormap)  that  is no longer
                                    in use.
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DESCRIPTION
     The default allocator for resource identifiers  provided  by
     Xlib is very simple-minded and does not allow resource iden-
     tifiers  to  be  re-used.   If  a  long-running  application
     reaches  the  end of the resource id space, it will generate
     an X protocol error and crash.  Tk replaces the  default  id
     allocator  with  its own allocator, which allows identifiers
     to be reused.  In order for this to work, Tk_FreeXId must be
     called  to tell the allocator about resources that have been
     freed.  Tk automatically calls Tk_FreeXId whenever it  frees
     a  resource,  so  if  you  use  procedures  like Tk_GetFont,
     Tk_GetGC,  and  Tk_GetPixmap  then   you   need   not   call
     Tk_FreeXId.   However,  if  you  allocate resources directly
     from Xlib, for example by calling  XCreatePixmap,  then  you
     should  call Tk_FreeXId when you call the corresponding Xlib
     free procedure, such as  XFreePixmap.   If  you  don't  call
     Tk_FreeXId  then the resource identifier will be lost, which
     could cause problems if the application runs long enough  to
     lose all of the available identifiers.


KEYWORDS
     resource identifier

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