/* 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;

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