CentOS 7.0 - man page for tk_getatomname (centos section 3)
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Tk_InternAtom(3) Tk Library Procedures Tk_InternAtom(3)
Tk_InternAtom, Tk_GetAtomName - manage cache of X atoms
const char *
Tk_Window tkwin (in) Token for window. Used to map atom or name relative to a
const char *name (in) String name for which atom is desired.
Atom atom (in) Atom for which corresponding string name is desired.
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.
atom, cache, display
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