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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 /*
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23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
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24 * Use is subject to license terms.
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25 */
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26
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27 #pragma ident "@(#)time.c 1.3 05/06/08 SMI"
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28
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29 #include <sys/types.h>
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30 #include <sys/time.h>
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31 #include <stdlib.h>
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32 #include <stdio.h>
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33 #include <unistd.h>
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34 #include <libcpc.h>
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35
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36 #include "cpucmds.h"
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37
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38 static hrtime_t timebase;
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39
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40 void
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41 zerotime(void)
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42 {
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43 timebase = gethrtime();
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44 }
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45
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46 #define NSECPERSEC 1000000000.0
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47
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48 float
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49 mstimestamp(hrtime_t hrt)
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50 {
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51 if (hrt == 0)
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52 hrt = gethrtime();
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53 return ((float)(hrt - timebase) / NSECPERSEC);
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54 }
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