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/*-------------------------------------------------------------------------
*
* lselect.h--
* definitions for the replacement selection algorithm.
*
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: lselect.h,v 1.1.1.1 1996/07/09 06:22:02 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef LSELECT_H
#define LSELECT_H
#include "c.h"
#include "access/htup.h"
struct leftist {
short lt_dist; /* distance to leaf/empty node */
short lt_devnum; /* device number of tuple */
HeapTuple lt_tuple;
struct leftist *lt_left;
struct leftist *lt_right;
};
extern struct leftist *Tuples;
extern struct leftist *lmerge(struct leftist *pt, struct leftist *qt);
extern HeapTuple gettuple(struct leftist **treep, short *devnum);
extern int puttuple(struct leftist **treep, HeapTuple newtuple, int devnum);
extern void dumptuples(FILE *file);
extern int tuplecmp(HeapTuple ltup, HeapTuple rtup);
#ifdef EBUG
extern void checktree(struct leftist *tree);
extern int checktreer(struct leftist *tree, int level);
#endif /* EBUG */
#endif /* LSELECT_H */
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