gecko-dev/nsprpub/pr/tests/priotest.c

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C

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Netscape Portable Runtime (NSPR).
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998-2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
* File: priotest.c
* Purpose: testing priorities
*/
#include "prcmon.h"
#include "prinit.h"
#include "prinrval.h"
#include "prlock.h"
#include "prlog.h"
#include "prmon.h"
#include "prprf.h"
#include "prthread.h"
#include "prtypes.h"
#include "plerror.h"
#include "plgetopt.h"
#include <stdio.h>
#include <stdlib.h>
#define DEFAULT_DURATION 5
static PRBool failed = PR_FALSE;
static PRIntervalTime oneSecond;
static PRFileDesc *debug_out = NULL;
static PRBool debug_mode = PR_FALSE;
static PRUint32 PerSecond(PRIntervalTime timein)
{
PRUint32 loop = 0;
while (((PRIntervalTime)(PR_IntervalNow()) - timein) < oneSecond)
loop += 1;
return loop;
} /* PerSecond */
static void PR_CALLBACK Low(void *arg)
{
PRUint32 t3 = 0, t2 = 0, t1 = 0, t0, *tn = (PRUint32*)arg;
while (1)
{
t0 = PerSecond(PR_IntervalNow());
*tn = (t3 + 3 * t2 + 3 * t1 + t0) / 8;
t3 = t2; t2 = t1; t1 = t0;
}
} /* Low */
static void PR_CALLBACK High(void *arg)
{
PRUint32 t3 = 0, t2 = 0, t1 = 0, t0, *tn = (PRUint32*)arg;
while (1)
{
PRIntervalTime timein = PR_IntervalNow();
PR_Sleep(oneSecond >> 2); /* 0.25 seconds */
t0 = PerSecond(timein);
*tn = (t3 + 3 * t2 + 3 * t1 + t0) / 8;
t3 = t2; t2 = t1; t1 = t0;
}
} /* High */
static void Help(void)
{
PR_fprintf(
debug_out, "Usage: priotest [-d] [-c n]\n");
PR_fprintf(
debug_out, "-c n\tduration of test in seconds (default: %d)\n", DEFAULT_DURATION);
PR_fprintf(
debug_out, "-d\tturn on debugging output (default: FALSE)\n");
} /* Help */
static void RudimentaryTests(void)
{
/*
** Try some rudimentary tests like setting valid priority and
** getting it back, or setting invalid priorities and getting
** back a valid answer.
*/
PRThreadPriority priority;
PR_SetThreadPriority(PR_GetCurrentThread(), PR_PRIORITY_URGENT);
priority = PR_GetThreadPriority(PR_GetCurrentThread());
failed = ((PR_TRUE == failed) || (PR_PRIORITY_URGENT != priority))
? PR_TRUE : PR_FALSE;
if (debug_mode && (PR_PRIORITY_URGENT != priority))
{
PR_fprintf(debug_out, "PR_[S/G]etThreadPriority() failed\n");
}
PR_SetThreadPriority(
PR_GetCurrentThread(), (PRThreadPriority)(PR_PRIORITY_FIRST - 1));
priority = PR_GetThreadPriority(PR_GetCurrentThread());
failed = ((PR_TRUE == failed) || (PR_PRIORITY_FIRST != priority))
? PR_TRUE : PR_FALSE;
if (debug_mode && (PR_PRIORITY_FIRST != priority))
{
PR_fprintf(debug_out, "PR_SetThreadPriority(-1) failed\n");
}
PR_SetThreadPriority(
PR_GetCurrentThread(), (PRThreadPriority)(PR_PRIORITY_LAST + 1));
priority = PR_GetThreadPriority(PR_GetCurrentThread());
failed = ((PR_TRUE == failed) || (PR_PRIORITY_LAST != priority))
? PR_TRUE : PR_FALSE;
if (debug_mode && (PR_PRIORITY_LAST != priority))
{
PR_fprintf(debug_out, "PR_SetThreadPriority(+1) failed\n");
}
} /* RudimentataryTests */
static void CreateThreads(PRUint32 *lowCount, PRUint32 *highCount)
{
(void)PR_CreateThread(
PR_USER_THREAD, Low, lowCount, PR_PRIORITY_LOW,
PR_LOCAL_THREAD, PR_JOINABLE_THREAD, 0);
(void)PR_CreateThread(
PR_USER_THREAD, High, highCount, PR_PRIORITY_HIGH,
PR_LOCAL_THREAD, PR_JOINABLE_THREAD, 0);
} /* CreateThreads */
int main(int argc, char **argv)
{
PLOptStatus os;
PRIntn duration = DEFAULT_DURATION;
PRUint32 totalCount, highCount = 0, lowCount = 0;
PLOptState *opt = PL_CreateOptState(argc, argv, "hdc:");
debug_out = PR_STDOUT;
oneSecond = PR_SecondsToInterval(1);
while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))
{
if (PL_OPT_BAD == os) continue;
switch (opt->option)
{
case 'd': /* debug mode */
debug_mode = PR_TRUE;
break;
case 'c': /* test duration */
duration = atoi(opt->value);
break;
case 'h': /* help message */
default:
Help();
return 2;
}
}
PL_DestroyOptState(opt);
PR_STDIO_INIT();
if (duration == 0) duration = DEFAULT_DURATION;
RudimentaryTests();
printf("Priority test: running for %d seconds\n\n", duration);
(void)PerSecond(PR_IntervalNow());
totalCount = PerSecond(PR_IntervalNow());
PR_SetThreadPriority(PR_GetCurrentThread(), PR_PRIORITY_URGENT);
if (debug_mode)
{
PR_fprintf(debug_out,
"The high priority thread should get approximately three\n");
PR_fprintf( debug_out,
"times what the low priority thread manages. A maximum of \n");
PR_fprintf( debug_out, "%d cycles are available.\n\n", totalCount);
}
duration = (duration + 4) / 5;
CreateThreads(&lowCount, &highCount);
while (duration--)
{
PRIntn loop = 5;
while (loop--) PR_Sleep(oneSecond);
if (debug_mode)
PR_fprintf(debug_out, "high : low :: %d : %d\n", highCount, lowCount);
}
PR_ProcessExit((failed) ? 1 : 0);
PR_ASSERT(!"You can't get here -- but you did!");
return 1; /* or here */
} /* main */
/* priotest.c */