/* -*- 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:            inrval.c
** description:     Interval conversion test.
** Modification History:
** 15-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 "prinit.h"
#include "obsolete/pralarm.h"

#include "prio.h"
#include "prprf.h"
#include "prlock.h"
#include "prlong.h"
#include "prcvar.h"
#include "prinrval.h"
#include "prtime.h"

#include "plgetopt.h"

#include <stdio.h>
#include <stdlib.h>

static PRIntn debug_mode;
static PRFileDesc* output;

static void TestConversions(void) {
  PRIntervalTime ticks = PR_TicksPerSecond();

  if (debug_mode) {
    PR_fprintf(output, "PR_TicksPerSecond: %ld\n\n", ticks);
    PR_fprintf(output, "PR_SecondsToInterval(1): %ld\n",
               PR_SecondsToInterval(1));
    PR_fprintf(output, "PR_MillisecondsToInterval(1000): %ld\n",
               PR_MillisecondsToInterval(1000));
    PR_fprintf(output, "PR_MicrosecondsToInterval(1000000): %ld\n\n",
               PR_MicrosecondsToInterval(1000000));

    PR_fprintf(output, "PR_SecondsToInterval(3): %ld\n",
               PR_SecondsToInterval(3));
    PR_fprintf(output, "PR_MillisecondsToInterval(3000): %ld\n",
               PR_MillisecondsToInterval(3000));
    PR_fprintf(output, "PR_MicrosecondsToInterval(3000000): %ld\n\n",
               PR_MicrosecondsToInterval(3000000));

    PR_fprintf(output, "PR_IntervalToSeconds(%ld): %ld\n", ticks,
               PR_IntervalToSeconds(ticks));
    PR_fprintf(output, "PR_IntervalToMilliseconds(%ld): %ld\n", ticks,
               PR_IntervalToMilliseconds(ticks));
    PR_fprintf(output, "PR_IntervalToMicroseconds(%ld): %ld\n\n", ticks,
               PR_IntervalToMicroseconds(ticks));

    ticks *= 3;
    PR_fprintf(output, "PR_IntervalToSeconds(%ld): %ld\n", ticks,
               PR_IntervalToSeconds(ticks));
    PR_fprintf(output, "PR_IntervalToMilliseconds(%ld): %ld\n", ticks,
               PR_IntervalToMilliseconds(ticks));
    PR_fprintf(output, "PR_IntervalToMicroseconds(%ld): %ld\n\n", ticks,
               PR_IntervalToMicroseconds(ticks));
  } /*end debug mode */
} /* TestConversions */

static void TestIntervalOverhead(void) {
  /* Hopefully the optimizer won't delete this function */
  PRUint32 elapsed, per_call, loops = 1000000;

  PRIntervalTime timeout, timein = PR_IntervalNow();
  while (--loops > 0) {
    timeout = PR_IntervalNow();
  }

  elapsed = 1000U * PR_IntervalToMicroseconds(timeout - timein);
  per_call = elapsed / 1000000U;
  PR_fprintf(output, "Overhead of 'PR_IntervalNow()' is %u nsecs\n\n",
             per_call);
} /* TestIntervalOverhead */

static void TestNowOverhead(void) {
  PRTime timeout, timein;
  PRInt32 overhead, loops = 1000000;
  PRInt64 elapsed, per_call, ten23rd, ten26th;

  LL_I2L(ten23rd, 1000);
  LL_I2L(ten26th, 1000000);

  timein = PR_Now();
  while (--loops > 0) {
    timeout = PR_Now();
  }

  LL_SUB(elapsed, timeout, timein);
  LL_MUL(elapsed, elapsed, ten23rd);
  LL_DIV(per_call, elapsed, ten26th);
  LL_L2I(overhead, per_call);
  PR_fprintf(output, "Overhead of 'PR_Now()' is %u nsecs\n\n", overhead);
} /* TestNowOverhead */

static void TestIntervals(void) {
  PRStatus rv;
  PRUint32 delta;
  PRInt32 seconds;
  PRUint64 elapsed, thousand;
  PRTime timein, timeout;
  PRLock* ml = PR_NewLock();
  PRCondVar* cv = PR_NewCondVar(ml);
  for (seconds = 0; seconds < 10; ++seconds) {
    PRIntervalTime ticks = PR_SecondsToInterval(seconds);
    PR_Lock(ml);
    timein = PR_Now();
    rv = PR_WaitCondVar(cv, ticks);
    timeout = PR_Now();
    PR_Unlock(ml);
    LL_SUB(elapsed, timeout, timein);
    LL_I2L(thousand, 1000);
    LL_DIV(elapsed, elapsed, thousand);
    LL_L2UI(delta, elapsed);
    if (debug_mode)
      PR_fprintf(output,
                 "TestIntervals: %swaiting %ld seconds took %ld msecs\n",
                 ((rv == PR_SUCCESS) ? "" : "FAILED "), seconds, delta);
  }
  PR_DestroyCondVar(cv);
  PR_DestroyLock(ml);
  if (debug_mode) {
    PR_fprintf(output, "\n");
  }
} /* TestIntervals */

static PRIntn PR_CALLBACK RealMain(int argc, char** argv) {
  PRUint32 vcpu, cpus = 0, loops = 1000;

  /* 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
  */

  /* main test */

  PLOptStatus os;
  PLOptState* opt = PL_CreateOptState(argc, argv, "dl:c:");
  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;
      case 'c': /* concurrency counter */
        cpus = atoi(opt->value);
        break;
      case 'l': /* loop counter */
        loops = atoi(opt->value);
        break;
      default:
        break;
    }
  }
  PL_DestroyOptState(opt);

  output = PR_GetSpecialFD(PR_StandardOutput);
  PR_fprintf(output, "inrval: Examine stdout to determine results.\n");

  if (cpus == 0) {
    cpus = 8;
  }
  if (loops == 0) {
    loops = 1000;
  }

  if (debug_mode > 0) {
    PR_fprintf(output, "Inrval: Using %d loops\n", loops);
    PR_fprintf(output, "Inrval: Using 1 and %d cpu(s)\n", cpus);
  }

  for (vcpu = 1; vcpu <= cpus; vcpu += cpus - 1) {
    if (debug_mode) {
      PR_fprintf(output, "\nInrval: Using %d CPU(s)\n\n", vcpu);
    }
    PR_SetConcurrency(vcpu);

    TestNowOverhead();
    TestIntervalOverhead();
    TestConversions();
    TestIntervals();
  }

  return 0;
}

int main(int argc, char** argv) {
  PRIntn rv;

  PR_STDIO_INIT();
  rv = PR_Initialize(RealMain, argc, argv, 0);
  return rv;
} /* main */
