source: vbox/trunk/src/libs/xpcom18a4/nsprpub/pr/tests/initclk.c@ 81786

/* -*- 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 ***** */

/*
 * This is a regression test for the bug that the interval timer
 * is not initialized when _PR_CreateCPU calls PR_IntervalNow.
 * The bug would make this test program finish prematurely,
 * when the SHORT_TIMEOUT period expires.  The correct behavior
 * is for the test to finish when the LONG_TIMEOUT period expires.
 */

#include "prlock.h"
#include "prcvar.h"
#include "prthread.h"
#include "prinrval.h"
#include "prlog.h"
#include <stdio.h>

/* The timeouts, in milliseconds */
#define SHORT_TIMEOUT 1000
#define LONG_TIMEOUT 3000

PRLock *lock1, *lock2;
PRCondVar *cv1, *cv2;

void ThreadFunc(void *arg)
{
    PR_Lock(lock1);
    PR_WaitCondVar(cv1, PR_MillisecondsToInterval(SHORT_TIMEOUT));
    PR_Unlock(lock1);
}

int main()
{
    PRThread *thread;
    PRIntervalTime start, end;
    PRUint32 elapsed_ms;

    lock1 = PR_NewLock();
    PR_ASSERT(NULL != lock1);
    cv1 = PR_NewCondVar(lock1);
    PR_ASSERT(NULL != cv1);
    lock2 = PR_NewLock();
    PR_ASSERT(NULL != lock2);
    cv2 = PR_NewCondVar(lock2);
    PR_ASSERT(NULL != cv2);
    start = PR_IntervalNow();
    thread = PR_CreateThread(
            PR_USER_THREAD,
            ThreadFunc,
            NULL,
            PR_PRIORITY_NORMAL,
            PR_LOCAL_THREAD,
            PR_JOINABLE_THREAD,
            0);
    PR_ASSERT(NULL != thread);
    PR_Lock(lock2);
    PR_WaitCondVar(cv2, PR_MillisecondsToInterval(LONG_TIMEOUT));
    PR_Unlock(lock2);
    PR_JoinThread(thread);
    end = PR_IntervalNow();
    elapsed_ms = PR_IntervalToMilliseconds((PRIntervalTime)(end - start));
    /* Allow 100ms imprecision */
    if (elapsed_ms < LONG_TIMEOUT - 100 || elapsed_ms > LONG_TIMEOUT + 100) {
        printf("Elapsed time should be %u ms but is %u ms\n",
                LONG_TIMEOUT, elapsed_ms);
        printf("FAIL\n");
        exit(1);
    }
        printf("Elapsed time: %u ms, expected time: %u ms\n",
               LONG_TIMEOUT, elapsed_ms);
    printf("PASS\n");
    return 0;
}