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Back out most of the last backout. :-) Guido removed the 1.1.1.1->1.1.1.2

Browse source 
changes from the vendor branch as well, backing the db-1.82 changes.

This file should now be the same as it was in rev 1.1.1.2.
This commit is contained in:
Peter Wemm 1996-10-19 01:34:25 +00:00
parent 8713ad7411
commit ba8f828b88
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=19029
1 changed files with 18 additions and 10 deletions
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28
lib/libc/db/hash/hash_buf.c
View file

@ -1,5 +1,5 @@
/*-
* Copyright (c) 1990, 1993
* Copyright (c) 1990, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
@ -35,7 +35,7 @@
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)hash_buf.c 8.2 (Berkeley) 2/21/94";
static char sccsid[] = "@(#)hash_buf.c 8.5 (Berkeley) 7/15/94";
#endif /* LIBC_SCCS and not lint */
/*
@ -57,8 +57,10 @@ static char sccsid[] = "@(#)hash_buf.c 8.2 (Berkeley) 2/21/94";
#include <sys/param.h>
#include <errno.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef DEBUG
#include <assert.h>
#endif
@ -68,7 +70,7 @@ static char sccsid[] = "@(#)hash_buf.c 8.2 (Berkeley) 2/21/94";
#include "page.h"
#include "extern.h"
static BUFHEAD *newbuf __P((HTAB *, u_int, BUFHEAD *));
static BUFHEAD *newbuf __P((HTAB *, u_int32_t, BUFHEAD *));
/* Unlink B from its place in the lru */
#define BUF_REMOVE(B) { \
@ -102,12 +104,12 @@ static BUFHEAD *newbuf __P((HTAB *, u_int, BUFHEAD *));
extern BUFHEAD *
__get_buf(hashp, addr, prev_bp, newpage)
HTAB *hashp;
u_int addr;
u_int32_t addr;
BUFHEAD *prev_bp;
int newpage; /* If prev_bp set, indicates a new overflow page. */
{
register BUFHEAD *bp;
register u_int is_disk_mask;
register u_int32_t is_disk_mask;
register int is_disk, segment_ndx;
SEGMENT segp;
@ -140,7 +142,7 @@ __get_buf(hashp, addr, prev_bp, newpage)
return (NULL);
if (!prev_bp)
segp[segment_ndx] =
(BUFHEAD *)((u_int)bp | is_disk_mask);
(BUFHEAD *)((ptrdiff_t)bp | is_disk_mask);
} else {
BUF_REMOVE(bp);
MRU_INSERT(bp);
@ -157,7 +159,7 @@ __get_buf(hashp, addr, prev_bp, newpage)
static BUFHEAD *
newbuf(hashp, addr, prev_bp)
HTAB *hashp;
u_int addr;
u_int32_t addr;
BUFHEAD *prev_bp;
{
register BUFHEAD *bp; /* The buffer we're going to use */
@ -165,7 +167,7 @@ newbuf(hashp, addr, prev_bp)
register BUFHEAD *next_xbp;
SEGMENT segp;
int segment_ndx;
u_short oaddr, *shortp;
u_int16_t oaddr, *shortp;
oaddr = 0;
bp = LRU;
@ -177,10 +179,16 @@ newbuf(hashp, addr, prev_bp)
/* Allocate a new one */
if ((bp = (BUFHEAD *)malloc(sizeof(BUFHEAD))) == NULL)
return (NULL);
#ifdef PURIFY
memset(bp, 0xff, sizeof(BUFHEAD));
#endif
if ((bp->page = (char *)malloc(hashp->BSIZE)) == NULL) {
free(bp);
return (NULL);
}
#ifdef PURIFY
memset(bp->page, 0xff, hashp->BSIZE);
#endif
if (hashp->nbufs)
hashp->nbufs--;
} else {
@ -195,7 +203,7 @@ newbuf(hashp, addr, prev_bp)
* Set oaddr before __put_page so that you get it
* before bytes are swapped.
*/
shortp = (u_short *)bp->page;
shortp = (u_int16_t *)bp->page;
if (shortp[0])
oaddr = shortp[shortp[0] - 1];
if ((bp->flags & BUF_MOD) && __put_page(hashp, bp->page,
@ -238,7 +246,7 @@ newbuf(hashp, addr, prev_bp)
(oaddr != xbp->addr))
break;
shortp = (u_short *)xbp->page;
shortp = (u_int16_t *)xbp->page;
if (shortp[0])
/* set before __put_page */
oaddr = shortp[shortp[0] - 1];