The Tor Browser: nsprpub/pr/tests/priotest.c@7e26c7da4463 (annotated)

nsprpub/pr/tests/priotest.c@7e26c7da4463 (annotated)

nsprpub/pr/tests/priotest.c

Wed, 31 Dec 2014 06:55:50 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:55:50 +0100
changeset 2: 7e26c7da4463
permissions: -rw-r--r--

Added tag UPSTREAM_283F7C6 for changeset ca08bd8f51b2

 /* -*- 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, You can obtain one at http://mozilla.org/MPL/2.0/. */
 /*
  * 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 */

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nsprpub/pr/tests/priotest.c@7e26c7da4463 (annotated)

nsprpub/pr/tests/priotest.c