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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
/*
* 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_NOT_REACHED("You can't get here -- but you did!");
return 1; /* or here */
} /* main */
/* priotest.c */