annotate usr/src/cmd/fmli/sys/varshrink.c @ 0:c9caec207d52 b86

Initial porting based on b86
author Koji Uno <koji.uno@sun.com>
date Tue, 02 Jun 2009 18:56:50 +0900
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children 1a15d5aaf794
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c9caec207d52 Initial porting based on b86
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1 /*
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2 * CDDL HEADER START
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3 *
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4 * The contents of this file are subject to the terms of the
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5 * Common Development and Distribution License, Version 1.0 only
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6 * (the "License"). You may not use this file except in compliance
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7 * with the License.
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8 *
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9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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10 * or http://www.opensolaris.org/os/licensing.
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11 * See the License for the specific language governing permissions
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12 * and limitations under the License.
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13 *
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14 * When distributing Covered Code, include this CDDL HEADER in each
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15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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16 * If applicable, add the following below this CDDL HEADER, with the
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17 * fields enclosed by brackets "[]" replaced with your own identifying
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18 * information: Portions Copyright [yyyy] [name of copyright owner]
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19 *
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20 * CDDL HEADER END
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21 */
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22 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
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23 /* All Rights Reserved */
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24
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25
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26 /*
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27 * Copyright (c) 1986 AT&T
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28 * All Rights Reserved
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29 */
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30 #ident "@(#)varshrink.c 1.6 05/06/08 SMI" /* SVr4.0 1.3 */
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31
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32 #include <stdio.h>
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33 #include "wish.h"
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34 #include "var_arrays.h"
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35
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36 /*
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37 * shrink the actual space used by a v_array as much as possible
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38 * note that this requires the process to allocate more space
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39 * before giving some back, so it may actually INCREASE the data
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40 * segment size of the process. If used, array_shrink should be
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41 * called before adding things to other v_arrays, since perhaps
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42 * one of them can take advantage of the freed space.
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43 */
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44 struct v_array *
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45 array_shrink(array)
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46 struct v_array array[];
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47 {
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48 register struct v_array *ptr;
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49 register struct v_array *newptr;
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50
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51 ptr = v_header(array);
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52 if ((newptr = (struct v_array *)realloc(ptr, sizeof(struct v_array) + ptr->tot_used * ptr->ele_size)) == NULL)
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53 return NULL;
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54 return v_body(newptr); /* chged ptr to newptr. abs k14.2 */
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55 }