michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /*
michael@0: ** File:        lockfile.c
michael@0: ** Purpose:     test basic locking functions
michael@0: **              Just because this times stuff, don't think its a perforamnce
michael@0: **              test!!!
michael@0: **
michael@0: ** Modification History:
michael@0: ** 19-May-97 AGarcia- Converted the test to accomodate the debug_mode flag.
michael@0: **	         The debug mode will print all of the printfs associated with this test.
michael@0: **			 The regress mode will be the default mode. Since the regress tool limits
michael@0: **           the output to a one line status:PASS or FAIL,all of the printf statements
michael@0: **			 have been handled with an if (debug_mode) statement.
michael@0: ** 04-June-97 AGarcia removed the Test_Result function. Regress tool has been updated to
michael@0: **			recognize the return code from tha main program.
michael@0: ***********************************************************************/
michael@0: /***********************************************************************
michael@0: ** Includes
michael@0: ***********************************************************************/
michael@0: /* Used to get the command line option */
michael@0: #include "plgetopt.h"
michael@0: 
michael@0: #include "prcmon.h"
michael@0: #include "prerror.h"
michael@0: #include "prinit.h"
michael@0: #include "prinrval.h"
michael@0: #include "prlock.h"
michael@0: #include "prlog.h"
michael@0: #include "prmon.h"
michael@0: #include "prthread.h"
michael@0: #include "prtypes.h"
michael@0: 
michael@0: #include "private/pprio.h"
michael@0: 
michael@0: #include <stdio.h>
michael@0: #include <stdlib.h>
michael@0: #include <string.h>
michael@0: 
michael@0: PRIntn failed_already=0;
michael@0: PRIntn debug_mode;
michael@0: 
michael@0: const static PRIntervalTime contention_interval = 50;
michael@0: 
michael@0: typedef struct LockContentious_s {
michael@0:     PRLock *ml;
michael@0:     PRInt32 loops;
michael@0:     PRIntervalTime overhead;
michael@0:     PRIntervalTime interval;
michael@0: } LockContentious_t;
michael@0: 
michael@0: #define LOCKFILE "prlock.fil"
michael@0: 
michael@0: 
michael@0: 
michael@0: static PRIntervalTime NonContentiousLock(PRInt32 loops)
michael@0: {
michael@0:     PRFileDesc *_lockfile;
michael@0:     while (loops-- > 0)
michael@0:     {
michael@0:         _lockfile = PR_Open(LOCKFILE, PR_CREATE_FILE|PR_RDWR, 0666);
michael@0:         if (!_lockfile) {
michael@0:             if (debug_mode) printf(
michael@0:                 "could not create lockfile: %d [%d]\n",
michael@0:                 PR_GetError(), PR_GetOSError());
michael@0:             return PR_INTERVAL_NO_TIMEOUT;
michael@0:         }
michael@0:         PR_LockFile(_lockfile);
michael@0:         PR_UnlockFile(_lockfile);
michael@0:         PR_Close(_lockfile);
michael@0:     }
michael@0:     return 0;
michael@0: }  /* NonContentiousLock */
michael@0: 
michael@0: static void PR_CALLBACK LockContender(void *arg)
michael@0: {
michael@0:     LockContentious_t *contention = (LockContentious_t*)arg;
michael@0:     PRFileDesc *_lockfile;
michael@0:     while (contention->loops-- > 0)
michael@0:     {
michael@0:         _lockfile = PR_Open(LOCKFILE, PR_CREATE_FILE|PR_RDWR, 0666);
michael@0:         if (!_lockfile) {
michael@0:             if (debug_mode) printf(
michael@0:                 "could not create lockfile: %d [%d]\n",
michael@0:                 PR_GetError(), PR_GetOSError());
michael@0:             break;
michael@0:         }
michael@0:         PR_LockFile(_lockfile);
michael@0:         PR_Sleep(contention->interval);
michael@0:         PR_UnlockFile(_lockfile);
michael@0:         PR_Close(_lockfile);
michael@0:     }
michael@0: 
michael@0: }  /* LockContender */
michael@0: 
michael@0: /*
michael@0: ** Win16 requires things passed to Threads not be on the stack
michael@0: */
michael@0: static LockContentious_t contention;
michael@0: 
michael@0: static PRIntervalTime ContentiousLock(PRInt32 loops)
michael@0: {
michael@0:     PRStatus status;
michael@0:     PRThread *thread = NULL;
michael@0:     PRIntervalTime overhead, timein = PR_IntervalNow();
michael@0: 
michael@0:     contention.loops = loops;
michael@0:     contention.overhead = 0;
michael@0:     contention.ml = PR_NewLock();
michael@0:     contention.interval = contention_interval;
michael@0:     thread = PR_CreateThread(
michael@0:         PR_USER_THREAD, LockContender, &contention,
michael@0:         PR_PRIORITY_LOW, PR_LOCAL_THREAD, PR_JOINABLE_THREAD, 0);
michael@0:     PR_ASSERT(thread != NULL);
michael@0: 
michael@0:     overhead = PR_IntervalNow() - timein;
michael@0: 
michael@0:     while (contention.loops > 0)
michael@0:     {
michael@0:         PR_Lock(contention.ml);
michael@0:         contention.overhead += contention.interval;
michael@0:         PR_Sleep(contention.interval);
michael@0:         PR_Unlock(contention.ml);
michael@0:     }
michael@0: 
michael@0:     timein = PR_IntervalNow();
michael@0:     status = PR_JoinThread(thread);
michael@0:     PR_DestroyLock(contention.ml);
michael@0:     overhead += (PR_IntervalNow() - timein);
michael@0:     return overhead + contention.overhead;
michael@0: }  /* ContentiousLock */
michael@0: 
michael@0: static PRIntervalTime Test(
michael@0:     const char* msg, PRIntervalTime (*test)(PRInt32 loops),
michael@0:     PRInt32 loops, PRIntervalTime overhead)
michael@0: { 
michael@0:     /*
michael@0:      * overhead - overhead not measured by the test.
michael@0:      * duration - wall clock time it took to perform test.
michael@0:      * predicted - extra time test says should not be counted 
michael@0:      *
michael@0:      * Time accountable to the test is duration - overhead - predicted
michael@0:      * All times are Intervals and accumulated for all iterations.
michael@0:      */
michael@0:     PRFloat64 elapsed;
michael@0:     PRIntervalTime accountable, duration;    
michael@0:     PRUintn spaces = strlen(msg);
michael@0:     PRIntervalTime timeout, timein = PR_IntervalNow();
michael@0:     PRIntervalTime predicted = test(loops);
michael@0:     timeout = PR_IntervalNow();
michael@0:     duration = timeout - timein;
michael@0:     accountable = duration - predicted;
michael@0:     accountable -= overhead;
michael@0:     elapsed = (PRFloat64)PR_IntervalToMicroseconds(accountable);
michael@0:     if (debug_mode) printf("%s:", msg);
michael@0:     while (spaces++ < 50) if (debug_mode) printf(" ");
michael@0:     if ((PRInt32)accountable < 0) {
michael@0:         if (debug_mode) printf("*****.** usecs/iteration\n");
michael@0:     } else {
michael@0:         if (debug_mode) printf("%8.2f usecs/iteration\n", elapsed/loops);
michael@0:     }
michael@0:     return duration;
michael@0: }  /* Test */
michael@0: 
michael@0: int main(int argc,  char **argv)
michael@0: {
michael@0:     PRIntervalTime duration;
michael@0:     PRUint32 cpu, cpus = 2;
michael@0:     PRInt32 loops = 100;
michael@0: 
michael@0: 	
michael@0: 	/* The command line argument: -d is used to determine if the test is being run
michael@0: 	in debug mode. The regress tool requires only one line output:PASS or FAIL.
michael@0: 	All of the printfs associated with this test has been handled with a if (debug_mode)
michael@0: 	test.
michael@0: 	Usage: test_name -d
michael@0: 	*/
michael@0: 	PLOptStatus os;
michael@0: 	PLOptState *opt = PL_CreateOptState(argc, argv, "d:");
michael@0: 	while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))
michael@0:     {
michael@0: 		if (PL_OPT_BAD == os) continue;
michael@0:         switch (opt->option)
michael@0:         {
michael@0:         case 'd':  /* debug mode */
michael@0: 			debug_mode = 1;
michael@0:             break;
michael@0:          default:
michael@0:             break;
michael@0:         }
michael@0:     }
michael@0: 	PL_DestroyOptState(opt);
michael@0: 
michael@0:  /* main test */
michael@0: 	
michael@0:     PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 0);
michael@0:     PR_STDIO_INIT();
michael@0: 
michael@0:     if (argc > 1) loops = atoi(argv[1]);
michael@0:     if (loops == 0) loops = 100;
michael@0:     if (debug_mode) printf("Lock: Using %d loops\n", loops);
michael@0: 
michael@0:     cpus = (argc < 3) ? 2 : atoi(argv[2]);
michael@0:     if (cpus == 0) cpus = 2;
michael@0:     if (debug_mode) printf("Lock: Using %d cpu(s)\n", cpus);
michael@0: 
michael@0: 
michael@0:     for (cpu = 1; cpu <= cpus; ++cpu)
michael@0:     {
michael@0:         if (debug_mode) printf("\nLockFile: Using %d CPU(s)\n", cpu);
michael@0:         PR_SetConcurrency(cpu);
michael@0:         
michael@0:         duration = Test("LockFile non-contentious locking/unlocking", NonContentiousLock, loops, 0);
michael@0:         (void)Test("LockFile contentious locking/unlocking", ContentiousLock, loops, duration);
michael@0:     }
michael@0: 
michael@0:     PR_Delete(LOCKFILE);  /* try to get rid of evidence */
michael@0: 
michael@0:     if (debug_mode) printf("%s: test %s\n", "Lock(mutex) test", ((failed_already) ? "failed" : "passed"));
michael@0: 	if(failed_already)	
michael@0: 		return 1;
michael@0: 	else
michael@0: 		return 0;
michael@0: }  /* main */
michael@0: 
michael@0: /* testlock.c */