Utilities/cmcurl/timeval.c

   1 /***************************************************************************
   2  *                                  _   _ ____  _
   3  *  Project                     ___| | | |  _ \| |
   4  *                             / __| | | | |_) | |
   5  *                            | (__| |_| |  _ <| |___
   6  *                             \___|\___/|_| \_\_____|
   7  *
   8  * Copyright (C) 1998 - 2005, Daniel Stenberg, <daniel@haxx.se>, et al.
   9  *
  10  * This software is licensed as described in the file COPYING, which
  11  * you should have received as part of this distribution. The terms
  12  * are also available at http://curl.haxx.se/docs/copyright.html.
  13  *
  14  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
  15  * copies of the Software, and permit persons to whom the Software is
  16  * furnished to do so, under the terms of the COPYING file.
  17  *
  18  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  19  * KIND, either express or implied.
  20  *
  21  * $Id: timeval.c,v 1.2 2007-03-15 19:22:13 andy Exp $
  22  ***************************************************************************/
  23
  24 #include "timeval.h"
  25
  26 #ifndef HAVE_GETTIMEOFDAY
  27
  28 #ifdef WIN32
  29 #include <mmsystem.h>
  30
  31 static int gettimeofday(struct timeval *tp, void *nothing)
  32 {
  33 #ifdef WITHOUT_MM_LIB
  34   SYSTEMTIME st;
  35   time_t tt;
  36   struct tm tmtm;
  37   /* mktime converts local to UTC */
  38   GetLocalTime (&st);
  39   tmtm.tm_sec = st.wSecond;
  40   tmtm.tm_min = st.wMinute;
  41   tmtm.tm_hour = st.wHour;
  42   tmtm.tm_mday = st.wDay;
  43   tmtm.tm_mon = st.wMonth - 1;
  44   tmtm.tm_year = st.wYear - 1900;
  45   tmtm.tm_isdst = -1;
  46   tt = mktime (&tmtm);
  47   tp->tv_sec = tt;
  48   tp->tv_usec = st.wMilliseconds * 1000;
  49 #else
  50   /**
  51    ** The earlier time calculations using GetLocalTime
  52    ** had a time resolution of 10ms.The timeGetTime, part
  53    ** of multimedia apis offer a better time resolution
  54    ** of 1ms.Need to link against winmm.lib for this
  55    **/
  56   unsigned long Ticks = 0;
  57   unsigned long Sec =0;
  58   unsigned long Usec = 0;
  59   Ticks = timeGetTime();
  60
  61   Sec = Ticks/1000;
  62   Usec = (Ticks - (Sec*1000))*1000;
  63   tp->tv_sec = Sec;
  64   tp->tv_usec = Usec;
  65 #endif /* WITHOUT_MM_LIB */
  66   (void)nothing;
  67   return 0;
  68 }
  69 #else /* WIN32 */
  70 /* non-win32 version of Curl_gettimeofday() */
  71 static int gettimeofday(struct timeval *tp, void *nothing)
  72 {
  73   (void)nothing; /* we don't support specific time-zones */
  74   tp->tv_sec = (long)time(NULL);
  75   tp->tv_usec = 0;
  76   return 0;
  77 }
  78 #endif /* WIN32 */
  79 #endif /* HAVE_GETTIMEOFDAY */
  80
  81 /* Return the current time in a timeval struct */
  82 struct timeval curlx_tvnow(void)
  83 {
  84   struct timeval now;
  85   (void)gettimeofday(&now, NULL);
  86   return now;
  87 }
  88
  89 /*
  90  * Make sure that the first argument is the more recent time, as otherwise
  91  * we'll get a weird negative time-diff back...
  92  *
  93  * Returns: the time difference in number of milliseconds.
  94  */
  95 long curlx_tvdiff(struct timeval newer, struct timeval older)
  96 {
  97   return (newer.tv_sec-older.tv_sec)*1000+
  98     (newer.tv_usec-older.tv_usec)/1000;
  99 }
 100
 101 /*
 102  * Same as curlx_tvdiff but with full usec resolution.
 103  *
 104  * Returns: the time difference in seconds with subsecond resolution.
 105  */
 106 double curlx_tvdiff_secs(struct timeval newer, struct timeval older)
 107 {
 108   return (double)(newer.tv_sec-older.tv_sec)+
 109     (double)(newer.tv_usec-older.tv_usec)/1000000.0;
 110 }
 111
 112 /* return the number of seconds in the given input timeval struct */
 113 long Curl_tvlong(struct timeval t1)
 114 {
 115   return t1.tv_sec;
 116 }