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speeded up std_alloc()

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This commit is contained in:
ceriel 1990-11-12 13:56:38 +00:00
parent b089e0d7f8
commit 96d5009bef
1 changed files with 25 additions and 4 deletions
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29
modules/src/alloc/std_alloc.c
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@ -3,9 +3,10 @@
* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
* See the copyright notice in the ACK home directory, in the file "Copyright".
*/
/* st_alloc - get a structure from a free list. If no structures left,
/* std_alloc - get a structure from a free list. If no structures left,
create new ones.
The counterpart, st_free, is a macro, defined in alloc.h
This is a counting version of st_alloc.
*/
#include "alloc.h"
@ -17,6 +18,8 @@ std_alloc(phead, size, count, pcnt)
int *pcnt;
{
register char *p;
register long *q;
char *retval;
if (*phead == 0) {
while (count >= 1 && (p = malloc(size * count)) == 0) {
@ -35,7 +38,25 @@ std_alloc(phead, size, count, pcnt)
}
else p = *phead;
*phead = (char *) (((_PALLOC_) p)->_A_next);
p += size;
while (size--) *--p = 0;
return p;
retval = p;
q = (long *) p;
while (size >= 8*sizeof(long)) {
*q++ = 0;
*q++ = 0;
*q++ = 0;
*q++ = 0;
*q++ = 0;
*q++ = 0;
*q++ = 0;
*q++ = 0;
size -= 8*sizeof(long);
}
while (size >= sizeof(long)) {
*q++ = 0;
size -= sizeof(long);
}
p = (char *) q;
while (size--) *p++ = 0;
return retval;
}