mono/io-layer/timefuncs.c

   1 /*
   2  * timefuncs.c:  performance timer and other time functions
   3  *
   4  * Author:
   5  *      Dick Porter (dick@ximian.com)
   6  *
   7  * (C) 2002 Ximian, Inc.
   8  */
   9
  10 #include <config.h>
  11 #include <glib.h>
  12 #include <sys/time.h>
  13 #include <stdlib.h>
  14
  15 #include <mono/io-layer/wapi.h>
  16 #include <mono/io-layer/timefuncs-private.h>
  17
  18 #undef DEBUG
  19
  20 void _wapi_time_t_to_filetime (time_t timeval, WapiFileTime *filetime)
  21 {
  22         guint64 ticks;
  23
  24         ticks = ((guint64)timeval * 10000000) + 116444736000000000ULL;
  25         filetime->dwLowDateTime = ticks & 0xFFFFFFFF;
  26         filetime->dwHighDateTime = ticks >> 32;
  27 }
  28
  29 void _wapi_timeval_to_filetime (struct timeval *tv, WapiFileTime *filetime)
  30 {
  31         guint64 ticks;
  32
  33         ticks = ((guint64)tv->tv_sec * 10000000) +
  34                 ((guint64)tv->tv_usec * 10) + 116444736000000000ULL;
  35         filetime->dwLowDateTime = ticks & 0xFFFFFFFF;
  36         filetime->dwHighDateTime = ticks >> 32;
  37 }
  38
  39 gboolean QueryPerformanceCounter(WapiLargeInteger *count G_GNUC_UNUSED)
  40 {
  41         return(FALSE);
  42 }
  43
  44 gboolean QueryPerformanceFrequency(WapiLargeInteger *freq G_GNUC_UNUSED)
  45 {
  46         return(FALSE);
  47 }
  48
  49 guint32 GetTickCount (void)
  50 {
  51         struct timeval tv;
  52         guint32 ret;
  53
  54         ret=gettimeofday (&tv, NULL);
  55         if(ret==-1) {
  56                 return(0);
  57         }
  58
  59         /* This is supposed to return milliseconds since reboot but I
  60          * really can't be bothered to work out the uptime, especially
  61          * as the 32bit value wraps around every 47 days
  62          */
  63         ret=(guint32)((tv.tv_sec * 1000) + (tv.tv_usec / 1000));
  64
  65 #ifdef DEBUG
  66         g_message (G_GNUC_PRETTY_FUNCTION ": returning %d", ret);
  67 #endif
  68
  69         return(ret);
  70 }