nsprpub/pr/tests/initclk.c

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  15  * The Original Code is the Netscape Portable Runtime (NSPR).
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  37
  38 /*
  39  * This is a regression test for the bug that the interval timer
  40  * is not initialized when _PR_CreateCPU calls PR_IntervalNow.
  41  * The bug would make this test program finish prematurely,
  42  * when the SHORT_TIMEOUT period expires.  The correct behavior
  43  * is for the test to finish when the LONG_TIMEOUT period expires.
  44  */
  45
  46 #include "prlock.h"
  47 #include "prcvar.h"
  48 #include "prthread.h"
  49 #include "prinrval.h"
  50 #include "prlog.h"
  51 #include <stdio.h>
  52 #include <stdlib.h>
  53
  54 /* The timeouts, in milliseconds */
  55 #define SHORT_TIMEOUT 1000
  56 #define LONG_TIMEOUT 3000
  57
  58 PRLock *lock1, *lock2;
  59 PRCondVar *cv1, *cv2;
  60
  61 void ThreadFunc(void *arg)
  62 {
  63     PR_Lock(lock1);
  64     PR_WaitCondVar(cv1, PR_MillisecondsToInterval(SHORT_TIMEOUT));
  65     PR_Unlock(lock1);
  66 }
  67
  68 int main()
  69 {
  70     PRThread *thread;
  71     PRIntervalTime start, end;
  72     PRUint32 elapsed_ms;
  73
  74     lock1 = PR_NewLock();
  75     PR_ASSERT(NULL != lock1);
  76     cv1 = PR_NewCondVar(lock1);
  77     PR_ASSERT(NULL != cv1);
  78     lock2 = PR_NewLock();
  79     PR_ASSERT(NULL != lock2);
  80     cv2 = PR_NewCondVar(lock2);
  81     PR_ASSERT(NULL != cv2);
  82     start = PR_IntervalNow();
  83     thread = PR_CreateThread(
  84             PR_USER_THREAD,
  85             ThreadFunc,
  86             NULL,
  87             PR_PRIORITY_NORMAL,
  88             PR_LOCAL_THREAD,
  89             PR_JOINABLE_THREAD,
  90             0);
  91     PR_ASSERT(NULL != thread);
  92     PR_Lock(lock2);
  93     PR_WaitCondVar(cv2, PR_MillisecondsToInterval(LONG_TIMEOUT));
  94     PR_Unlock(lock2);
  95     PR_JoinThread(thread);
  96     end = PR_IntervalNow();
  97     elapsed_ms = PR_IntervalToMilliseconds((PRIntervalTime)(end - start));
  98     /* Allow 100ms imprecision */
  99     if (elapsed_ms < LONG_TIMEOUT - 100 || elapsed_ms > LONG_TIMEOUT + 100) {
 100         printf("Elapsed time should be %u ms but is %u ms\n",
 101                 LONG_TIMEOUT, elapsed_ms);
 102         printf("FAIL\n");
 103         exit(1);
 104     }
 105         printf("Elapsed time: %u ms, expected time: %u ms\n",
 106                LONG_TIMEOUT, elapsed_ms);
 107     printf("PASS\n");
 108     return 0;
 109 }