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

 /*

 ** File:        lockfile.c

 ** Purpose:     test basic locking functions

 **              Just because this times stuff, don't think its a perforamnce

 **              test!!!

 **

 ** Modification History:

 ** 19-May-97 AGarcia- Converted the test to accomodate the debug_mode flag.

 **	         The debug mode will print all of the printfs associated with this test.

 **			 The regress mode will be the default mode. Since the regress tool limits

 **           the output to a one line status:PASS or FAIL,all of the printf statements

 **			 have been handled with an if (debug_mode) statement.

 ** 04-June-97 AGarcia removed the Test_Result function. Regress tool has been updated to

 **			recognize the return code from tha main program.

 ***********************************************************************/

 /***********************************************************************

 ** Includes

 ***********************************************************************/

 /* Used to get the command line option */

 #include "plgetopt.h"

 #include "prcmon.h"

 #include "prerror.h"

 #include "prinit.h"

 #include "prinrval.h"

 #include "prlock.h"

 #include "prlog.h"

 #include "prmon.h"

 #include "prthread.h"

 #include "prtypes.h"

 #include "private/pprio.h"

 #include <stdio.h>

 #include <stdlib.h>

 #include <string.h>

 PRIntn failed_already=0;

 PRIntn debug_mode;

 const static PRIntervalTime contention_interval = 50;

 typedef struct LockContentious_s {

     PRLock *ml;

     PRInt32 loops;

     PRIntervalTime overhead;

     PRIntervalTime interval;

 } LockContentious_t;

 #define LOCKFILE "prlock.fil"

 static PRIntervalTime NonContentiousLock(PRInt32 loops)

 {

     PRFileDesc *_lockfile;

     while (loops-- > 0)

     {

         _lockfile = PR_Open(LOCKFILE, PR_CREATE_FILE|PR_RDWR, 0666);

         if (!_lockfile) {

             if (debug_mode) printf(

                 "could not create lockfile: %d [%d]\n",

                 PR_GetError(), PR_GetOSError());

             return PR_INTERVAL_NO_TIMEOUT;

         }

         PR_LockFile(_lockfile);

         PR_UnlockFile(_lockfile);

         PR_Close(_lockfile);

     }

     return 0;

 }  /* NonContentiousLock */

 static void PR_CALLBACK LockContender(void *arg)

 {

     LockContentious_t *contention = (LockContentious_t*)arg;

     PRFileDesc *_lockfile;

     while (contention->loops-- > 0)

     {

         _lockfile = PR_Open(LOCKFILE, PR_CREATE_FILE|PR_RDWR, 0666);

         if (!_lockfile) {

             if (debug_mode) printf(

                 "could not create lockfile: %d [%d]\n",

                 PR_GetError(), PR_GetOSError());

             break;

         }

         PR_LockFile(_lockfile);

         PR_Sleep(contention->interval);

         PR_UnlockFile(_lockfile);

         PR_Close(_lockfile);

     }

 }  /* LockContender */

 /*

 ** Win16 requires things passed to Threads not be on the stack

 */

 static LockContentious_t contention;

 static PRIntervalTime ContentiousLock(PRInt32 loops)

 {

     PRStatus status;

     PRThread *thread = NULL;

     PRIntervalTime overhead, timein = PR_IntervalNow();

     contention.loops = loops;

     contention.overhead = 0;

     contention.ml = PR_NewLock();

     contention.interval = contention_interval;

     thread = PR_CreateThread(

         PR_USER_THREAD, LockContender, &contention,

         PR_PRIORITY_LOW, PR_LOCAL_THREAD, PR_JOINABLE_THREAD, 0);

     PR_ASSERT(thread != NULL);

     overhead = PR_IntervalNow() - timein;

     while (contention.loops > 0)

     {

         PR_Lock(contention.ml);

         contention.overhead += contention.interval;

         PR_Sleep(contention.interval);

         PR_Unlock(contention.ml);

     }

     timein = PR_IntervalNow();

     status = PR_JoinThread(thread);

     PR_DestroyLock(contention.ml);

     overhead += (PR_IntervalNow() - timein);

     return overhead + contention.overhead;

 }  /* ContentiousLock */

 static PRIntervalTime Test(

     const char* msg, PRIntervalTime (*test)(PRInt32 loops),

     PRInt32 loops, PRIntervalTime overhead)

 { 

     /*

      * overhead - overhead not measured by the test.

      * duration - wall clock time it took to perform test.

      * predicted - extra time test says should not be counted 

      *

      * Time accountable to the test is duration - overhead - predicted

      * All times are Intervals and accumulated for all iterations.

      */

     PRFloat64 elapsed;

     PRIntervalTime accountable, duration;    

     PRUintn spaces = strlen(msg);

     PRIntervalTime timeout, timein = PR_IntervalNow();

     PRIntervalTime predicted = test(loops);

     timeout = PR_IntervalNow();

     duration = timeout - timein;

     accountable = duration - predicted;

     accountable -= overhead;

     elapsed = (PRFloat64)PR_IntervalToMicroseconds(accountable);

     if (debug_mode) printf("%s:", msg);

     while (spaces++ < 50) if (debug_mode) printf(" ");

     if ((PRInt32)accountable < 0) {

         if (debug_mode) printf("*****.** usecs/iteration\n");

     } else {

         if (debug_mode) printf("%8.2f usecs/iteration\n", elapsed/loops);

     }

     return duration;

 }  /* Test */

 int main(int argc,  char **argv)

 {

     PRIntervalTime duration;

     PRUint32 cpu, cpus = 2;

     PRInt32 loops = 100;

 	/* The command line argument: -d is used to determine if the test is being run

 	in debug mode. The regress tool requires only one line output:PASS or FAIL.

 	All of the printfs associated with this test has been handled with a if (debug_mode)

 	test.

 	Usage: test_name -d

 	*/

 	PLOptStatus os;

 	PLOptState *opt = PL_CreateOptState(argc, argv, "d:");

 	while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))

     {

 		if (PL_OPT_BAD == os) continue;

         switch (opt->option)

         {

         case 'd':  /* debug mode */

 			debug_mode = 1;

             break;

          default:

             break;

         }

     }

 	PL_DestroyOptState(opt);

  /* main test */

     PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 0);

     PR_STDIO_INIT();

     if (argc > 1) loops = atoi(argv[1]);

     if (loops == 0) loops = 100;

     if (debug_mode) printf("Lock: Using %d loops\n", loops);

     cpus = (argc < 3) ? 2 : atoi(argv[2]);

     if (cpus == 0) cpus = 2;

     if (debug_mode) printf("Lock: Using %d cpu(s)\n", cpus);

     for (cpu = 1; cpu <= cpus; ++cpu)

     {

         if (debug_mode) printf("\nLockFile: Using %d CPU(s)\n", cpu);

         PR_SetConcurrency(cpu);

         duration = Test("LockFile non-contentious locking/unlocking", NonContentiousLock, loops, 0);

         (void)Test("LockFile contentious locking/unlocking", ContentiousLock, loops, duration);

     }

     PR_Delete(LOCKFILE);  /* try to get rid of evidence */

     if (debug_mode) printf("%s: test %s\n", "Lock(mutex) test", ((failed_already) ? "failed" : "passed"));

 	if(failed_already)	

 		return 1;

 	else

 		return 0;

 }  /* main */

 /* testlock.c */