nsprpub/pr/src/cplus/tests/interval.cpp

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  37
  38 /* interval.cpp - a test program */
  39
  40 #include "rclock.h"
  41 #include "rcthread.h"
  42 #include "rcinrval.h"
  43 #include "rccv.h"
  44
  45 #include <prio.h>
  46 #include <prlog.h>
  47 #include <prprf.h>
  48
  49 #define DEFAULT_ITERATIONS 100
  50
  51 PRIntn main(PRIntn argc, char **argv)
  52 {
  53     RCLock ml;
  54     PRStatus rv;
  55     RCCondition cv(&ml);
  56
  57     RCInterval now, timeout, epoch, elapsed;
  58     PRFileDesc *output = PR_GetSpecialFD(PR_StandardOutput);
  59     PRIntn msecs, seconds, loops, iterations = DEFAULT_ITERATIONS;
  60
  61     /* slow, agonizing waits */
  62     for (seconds = 0; seconds < 10; ++seconds)
  63     {
  64         timeout = RCInterval::FromSeconds(seconds);
  65         cv.SetTimeout(timeout);
  66         {
  67             RCEnter lock(&ml);
  68
  69             epoch.SetToNow();
  70
  71             rv = cv.Wait();
  72             PR_ASSERT(PR_SUCCESS == rv);
  73
  74             now = RCInterval(RCInterval::now);
  75             elapsed = now - epoch;
  76         }
  77
  78         PR_fprintf(
  79             output, "Waiting %u seconds took %s%u milliseconds\n",
  80             seconds, ((elapsed < timeout)? "**" : ""),
  81             elapsed.ToMilliseconds());
  82     }
  83
  84     /* more slow, agonizing sleeps */
  85     for (seconds = 0; seconds < 10; ++seconds)
  86     {
  87         timeout = RCInterval::FromSeconds(seconds);
  88         {
  89             epoch.SetToNow();
  90
  91             rv = RCThread::Sleep(timeout);
  92             PR_ASSERT(PR_SUCCESS == rv);
  93
  94             now = RCInterval(RCInterval::now);
  95             elapsed = now - epoch;
  96         }
  97
  98         PR_fprintf(
  99             output, "Sleeping %u seconds took %s%u milliseconds\n",
 100             seconds, ((elapsed < timeout)? "**" : ""),
 101             elapsed.ToMilliseconds());
 102     }
 103
 104     /* fast, spritely little devils */
 105     for (msecs = 10; msecs < 100; msecs += 10)
 106     {
 107         timeout = RCInterval::FromMilliseconds(msecs);
 108         cv.SetTimeout(timeout);
 109         {
 110             RCEnter lock(&ml);
 111
 112             epoch.SetToNow();
 113
 114             for (loops = 0; loops < iterations; ++loops)
 115             {
 116                 rv = cv.Wait();
 117                 PR_ASSERT(PR_SUCCESS == rv);
 118             }
 119
 120             now = RCInterval(RCInterval::now);
 121             elapsed = now - epoch;
 122         }
 123         elapsed /= iterations;
 124
 125         PR_fprintf(
 126             output, "Waiting %u msecs took %s%u milliseconds average\n",
 127             msecs, ((elapsed < timeout)? "**" : ""), elapsed.ToMilliseconds());
 128     }
 129     return 0;
 130 }  /* main */
 131
 132 /* interval.cpp */
 133