Tk_InternAtom(3) Tk Tk_InternAtom(3)
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NAME
Tk_InternAtom, Tk_GetAtomName - manage cache of X atoms
SYNOPSIS
#include <tk.h>
Atom
Tk_InternAtom(tkwin, name)
char *
Tk_GetAtomName(tkwin, atom)
ARGUMENTS
Tk_Window tkwin (in) Token for window. Used to
map atom or name relative to
a particular display.
char *name (in) String name for which atom is
desired.
Atom atom (in) Atom for which corresponding
string name is desired.
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DESCRIPTION
These procedures are similar to the Xlib procedures
XInternAtom and XGetAtomName. Tk_InternAtom returns the
atom identifier associated with string given by name; the
atom identifier is only valid for the display associated
with tkwin. Tk_GetAtomName returns the string associated
with atom on tkwin's display. The string returned by
Tk_GetAtomName is in Tk's storage: the caller need not free
this space when finished with the string, and the caller
should not modify the contents of the returned string. If
there is no atom atom on tkwin's display, then
Tk_GetAtomName returns the string ``?bad atom?''.
Tk caches the information returned by Tk_InternAtom and
Tk_GetAtomName so that future calls for the same information
can be serviced from the cache without contacting the
server. Thus Tk_InternAtom and Tk_GetAtomName are generally
much faster than their Xlib counterparts, and they should be
used in place of the Xlib procedures.
KEYWORDS
atom, cache, display
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