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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 */
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