/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Netscape Portable Runtime (NSPR).
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998-2000
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

/* interval.cpp - a test program */

#include "rclock.h"
#include "rcthread.h"
#include "rcinrval.h"
#include "rccv.h"

#include <prio.h>
#include <prlog.h>
#include <prprf.h>

#define DEFAULT_ITERATIONS 100

PRIntn main(PRIntn argc, char **argv)
{
    RCLock ml;
    PRStatus rv;
    RCCondition cv(&ml);

    RCInterval now, timeout, epoch, elapsed;
    PRFileDesc *output = PR_GetSpecialFD(PR_StandardOutput);
    PRIntn msecs, seconds, loops, iterations = DEFAULT_ITERATIONS;

    /* slow, agonizing waits */
    for (seconds = 0; seconds < 10; ++seconds)
    {
        timeout = RCInterval::FromSeconds(seconds);
        cv.SetTimeout(timeout);
        {
            RCEnter lock(&ml);

            epoch.SetToNow();

            rv = cv.Wait();
            PR_ASSERT(PR_SUCCESS == rv);

            now = RCInterval(RCInterval::now);
            elapsed = now - epoch;
        }

        PR_fprintf(
            output, "Waiting %u seconds took %s%u milliseconds\n",
            seconds, ((elapsed < timeout)? "**" : ""),
            elapsed.ToMilliseconds());
    }

    /* more slow, agonizing sleeps */
    for (seconds = 0; seconds < 10; ++seconds)
    {
        timeout = RCInterval::FromSeconds(seconds);
        {
            epoch.SetToNow();

            rv = RCThread::Sleep(timeout);
            PR_ASSERT(PR_SUCCESS == rv);

            now = RCInterval(RCInterval::now);
            elapsed = now - epoch;
        }

        PR_fprintf(
            output, "Sleeping %u seconds took %s%u milliseconds\n",
            seconds, ((elapsed < timeout)? "**" : ""),
            elapsed.ToMilliseconds());
    }

    /* fast, spritely little devils */
    for (msecs = 10; msecs < 100; msecs += 10)
    {
        timeout = RCInterval::FromMilliseconds(msecs);
        cv.SetTimeout(timeout);
        {
            RCEnter lock(&ml);

            epoch.SetToNow();

            for (loops = 0; loops < iterations; ++loops)
            {
                rv = cv.Wait();
                PR_ASSERT(PR_SUCCESS == rv);
            }

            now = RCInterval(RCInterval::now);
            elapsed = now - epoch;
        }
        elapsed /= iterations;

        PR_fprintf(
            output, "Waiting %u msecs took %s%u milliseconds average\n",
            msecs, ((elapsed < timeout)? "**" : ""), elapsed.ToMilliseconds());
    }
    return 0;
}  /* main */

/* interval.cpp */