X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/b202b2da3819475912294fd6740ab4adbffbf038..31cef89cb428866f787983e68246030321893df4:/usr/src/cmd/px/malloc.c

diff --git a/usr/src/cmd/px/malloc.c b/usr/src/cmd/px/malloc.c
index e8603a2550..acc96074d5 100644
--- a/usr/src/cmd/px/malloc.c
+++ b/usr/src/cmd/px/malloc.c
@@ -1,3 +1,12 @@
+/* Copyright (c) 1979 Regents of the University of California */
+
+static char sccsid[] = "@(#)malloc.c 4.1 10/10/80";
+
+/*
+ * Patched up version of malloc to do an integrity check
+ * on each allocation or free.
+ */
+
 #ifdef debug
 #define ASSERT(p,t) if(!(p))return(t(TRASHED));else
 #else
@@ -48,12 +57,12 @@ union store { union store *ptr;
 static	union store allocs[2];	/*initial arena*/
 static	union store *allocp;	/*search ptr*/
 static	union store *alloct;	/*arena top*/
-static	union store *allocx;	/*for benefit of realloc*/
 char	*sbrk();
 
 char *
 malloc(nbytes)
-unsigned nbytes;
+
+	unsigned nbytes;
 {
 	register union store *p, *q;
 	register nw;
@@ -108,17 +117,19 @@ found:
 	allocp = p + nw;
 	ASSERT(allocp<=alloct,(char *));
 	if(q>allocp) {
-		allocx = allocp->ptr;
 		allocp->ptr = p->ptr;
 	}
 	p->ptr = setbusy(allocp);
 	return((char *)(p+1));
 }
 
-/*	freeing strategy tuned for LIFO allocation
-*/
+/*
+ *	freeing strategy tuned for LIFO allocation
+ */
+
 free(ap)
-register char *ap;
+
+	register char *ap;
 {
 	register union store *p = (union store *)ap;
 
@@ -132,40 +143,6 @@ register char *ap;
 	return(NULL);
 }
 
-/*	realloc(p, nbytes) reallocates a block obtained from malloc()
- *	and freed since last call of malloc()
- *	to have new size nbytes, and old content
- *	returns new location, or 0 on failure
-*/
-
-char *
-realloc(p, nbytes)
-register union store *p;
-unsigned nbytes;
-{
-	register union store *q;
-	union store *s, *t;
-	register unsigned nw;
-	unsigned onw;
-
-	if(testbusy(p[-1].ptr))
-		free((char *)p);
-	onw = p[-1].ptr - p;
-	q = (union store *)malloc(nbytes);
-	if(q==NULL || q==p)
-		return((char *)q);
-	s = p;
-	t = q;
-	nw = (nbytes+WORD-1)/WORD;
-	if(nw<onw)
-		onw = nw;
-	while(onw--!=0)
-		*t++ = *s++;
-	if(q<p && q+nw>=p)
-		(q+(q+nw-p))->ptr = allocx;
-	return((char *)q);
-}
-
 #ifdef debug
 allock()
 {
@@ -184,4 +161,3 @@ allock()
 #endif
 }
 #endif
-