85 lines
2.2 KiB
C
85 lines
2.2 KiB
C
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/*
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* Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
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*
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* @APPLE_LICENSE_HEADER_START@
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*
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* Copyright (c) 1999-2008 Apple Inc. All Rights Reserved.
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this
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* file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_LICENSE_HEADER_END@
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*/
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/*
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* to test use of timestamp()
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*/
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/* cc hmi.c -o hmi libatomic.a */
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#include <stdio.h>
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#include "timestamp.h"
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void
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main(int argc, char **argv)
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{
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int i, j;
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SInt64 ts1, ts2;
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SInt64 ts3, ts4;
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struct timescale tsc;
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double scale;
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if (argc <= 1) {
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qtss_fprintf(stderr, "Usage: %s loop-count\n", argv[0]);
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exit(1);
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}
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j = atoi(argv[1]);
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ts1 = timestamp(); /* START */
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/* Loop for the given loop-count */
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for (i=0; i < j; i++) {
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;
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}
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ts2 = timestamp(); /* END */
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qtss_printf("ts1 = %qd, ts2 = %qd\n", ts1, ts2);
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utimescale(&tsc);
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scale = (double)tsc.tsc_numerator / (double)tsc.tsc_denominator;
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ts1 = (SInt64)((double)ts1 * scale);
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ts2 = (SInt64)((double)ts2 * scale);
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qtss_printf("ts1 = %qd, ts2 = %qd, micro seconds = %qd\n",
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ts1, ts2, (ts2 - ts1));
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/* Use the scaledtimestamp() now */
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ts3 = scaledtimestamp(scale); /* START */
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/* Loop for the given loop-count */
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for (i=0; i < j; i++) {
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;
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}
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ts4 = scaledtimestamp(scale); /* END */
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qtss_printf("ts3 = %qd, ts4 = %qd, micro seconds = %qd\n",
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ts3, ts4, (ts4 - ts3));
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}
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