sbsv2/raptor/util/ransleep/ransleep.c
author jjkang
Fri, 25 Jun 2010 19:56:45 +0800
changeset 604 b33dd54aaa52
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child 3 e1eecf4d390d
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add cpptoolsplat
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/*
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* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of the License "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: 
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*
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*/
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/* 
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   ransleep.c: sleep for some time period specified in milliseconds
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               optionally choose a random time up to the maximum time specified.
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   Description: Useful for delays between retries and for perturbing the
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	        start times of tools which might cause resource starvation 
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		if they all execute at exactly the same time.
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*/
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#include "../config.h"
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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// OS specific headers
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#ifdef HOST_WIN
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#include <windows.h>
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#else
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#include <sys/types.h>
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#include <sys/select.h>
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#endif
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int main(int argc, char *argv[])
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{
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	srand(getpid());
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	int millisecs=0;
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	if (argc != 2)
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	{
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		fprintf(stderr,"Must supply numeric argument - maximum milliseconds to sleep\n");
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		exit(1);
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	}
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	millisecs = atoi(argv[1]);
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	if (millisecs <= 0 )
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	{
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		fprintf(stderr,"Must supply numeric argument > 0 - maximum milliseconds to sleep\n");
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		exit(1);
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	}
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	millisecs = rand() % millisecs;
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	fprintf(stderr,"random sleep for %d milliseconds\n", millisecs);
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	#ifndef HAS_MILLISECONDSLEEP
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	struct timeval wtime;
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	wtime.tv_sec=millisecs/1000;
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	wtime.tv_usec=(millisecs % 1000) * 1000;
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	select(0,NULL,NULL,
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                  NULL, &wtime);
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	#else
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	Sleep(millisecs);
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	#endif
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	return 0;
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}
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