The Tor Browser: nsprpub/pr/tests/initclk.c@4ab42b5ab56c

     1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 /*

     7  * This is a regression test for the bug that the interval timer

     8  * is not initialized when _PR_CreateCPU calls PR_IntervalNow.

     9  * The bug would make this test program finish prematurely,

    10  * when the SHORT_TIMEOUT period expires.  The correct behavior

    11  * is for the test to finish when the LONG_TIMEOUT period expires.

    12  */

    14 #include "prlock.h"

    15 #include "prcvar.h"

    16 #include "prthread.h"

    17 #include "prinrval.h"

    18 #include "prlog.h"

    19 #include <stdio.h>

    20 #include <stdlib.h>

    22 /* The timeouts, in milliseconds */

    23 #define SHORT_TIMEOUT 1000

    24 #define LONG_TIMEOUT 3000

    26 PRLock *lock1, *lock2;

    27 PRCondVar *cv1, *cv2;

    29 void ThreadFunc(void *arg)

    30 {

    31     PR_Lock(lock1);

    32     PR_WaitCondVar(cv1, PR_MillisecondsToInterval(SHORT_TIMEOUT));

    33     PR_Unlock(lock1);

    34 }

    36 int main(int argc, char **argv)

    37 {

    38     PRThread *thread;

    39     PRIntervalTime start, end;

    40     PRUint32 elapsed_ms;

    42     lock1 = PR_NewLock();

    43     PR_ASSERT(NULL != lock1);

    44     cv1 = PR_NewCondVar(lock1);

    45     PR_ASSERT(NULL != cv1);

    46     lock2 = PR_NewLock();

    47     PR_ASSERT(NULL != lock2);

    48     cv2 = PR_NewCondVar(lock2);

    49     PR_ASSERT(NULL != cv2);

    50     start = PR_IntervalNow();

    51     thread = PR_CreateThread(

    52             PR_USER_THREAD,

    53             ThreadFunc,

    54             NULL,

    55             PR_PRIORITY_NORMAL,

    56             PR_LOCAL_THREAD,

    57             PR_JOINABLE_THREAD,

    58             0);

    59     PR_ASSERT(NULL != thread);

    60     PR_Lock(lock2);

    61     PR_WaitCondVar(cv2, PR_MillisecondsToInterval(LONG_TIMEOUT));

    62     PR_Unlock(lock2);

    63     PR_JoinThread(thread);

    64     end = PR_IntervalNow();

    65     elapsed_ms = PR_IntervalToMilliseconds((PRIntervalTime)(end - start));

    66     /* Allow 100ms imprecision */

    67     if (elapsed_ms < LONG_TIMEOUT - 100 || elapsed_ms > LONG_TIMEOUT + 100) {

    68         printf("Elapsed time should be %u ms but is %u ms\n",

    69                 LONG_TIMEOUT, elapsed_ms);

    70         printf("FAIL\n");

    71         exit(1);

    72     }

    73 	printf("Elapsed time: %u ms, expected time: %u ms\n",

    74                LONG_TIMEOUT, elapsed_ms);

    75     printf("PASS\n");

    76     return 0;

    77 }

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