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******************************************************************/

/****************************************************************
 *
 * Callbacks
 *
 ****************************************************************/

typedef XrmResource **CallbackTable;

#define _XtCBCalling 1
#define _XtCBFreeAfterCalling 2

_XFUNCPROTOBEGIN

typedef struct internalCallbackRec {
    unsigned short count;
    char	   is_padded;	/* contains NULL padding for external form */
    char	   call_state;  /* combination of _XtCB{FreeAfter}Calling */
#ifdef LONG64
    unsigned int   align_pad;	/* padding to align callback list */
#endif
    /* XtCallbackList */
} InternalCallbackRec, *InternalCallbackList;

typedef Boolean (*_XtConditionProc)(
    XtPointer	/* data */
);

extern void _XtAddCallback(
    InternalCallbackList*	/* callbacks */,
    XtCallbackProc		/* callback */,
    XtPointer 			/* closure */
);

extern void _XtAddCallbackOnce(
    InternalCallbackList*	/* callbacks */,
    XtCallbackProc		/* callback */,
    XtPointer 			/* closure */
);

extern InternalCallbackList _XtCompileCallbackList(
    XtCallbackList		/* xtcallbacks */
);

extern XtCallbackList _XtGetCallbackList(
    InternalCallbackList*	/* callbacks */
);

extern void _XtRemoveAllCallbacks(
    InternalCallbackList*	/* callbacks */
);

extern void _XtRemoveCallback(
    InternalCallbackList*	/* callbacks */,
    XtCallbackProc		/* callback */,
    XtPointer			/* closure */
);

extern void _XtPeekCallback(
    Widget			/* widget */,
    XtCallbackList		/* callbacks */,
    XtCallbackProc *		/* callback */,
    XtPointer *			/* closure */
);

extern void _XtCallConditionalCallbackList(
    Widget			/* widget */,
    XtCallbackList		/* callbacks */,
    XtPointer			/* call_data */,
    _XtConditionProc		/* cond_proc */
);

_XFUNCPROTOEND

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