compiler/clib/gettimeofday.c

   1 /*
   2     Copyright © 1995-2003, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Query the current time and/or timezone.
   6 */
   7
   8 #include "__arosc_privdata.h"
   9
  10 #include <proto/exec.h>
  11 #include <proto/dos.h>
  12 #include <proto/timer.h>
  13 #include <exec/types.h>
  14 #include <devices/timer.h>
  15 #include <aros/symbolsets.h>
  16 #include <aros/debug.h>
  17
  18
  19 #include "__time.h"
  20
  21 long __gmtoffset;
  22
  23 /*****************************************************************************
  24
  25     NAME */
  26 #include <sys/time.h>
  27 #include <unistd.h>
  28
  29         int gettimeofday (
  30
  31 /*  SYNOPSIS */
  32         struct timeval  * tv,
  33         struct timezone * tz)
  34
  35 /*  FUNCTION
  36         Return the current time and/or timezone.
  37
  38     INPUTS
  39         tv - If this pointer is non-NULL, the current time will be
  40                 stored here. The structure looks like this:
  41
  42                 struct timeval
  43                 {
  44                     long tv_sec;        // seconds
  45                     long tv_usec;       // microseconds
  46                 };
  47
  48         tz - If this pointer is non-NULL, the current timezone will be
  49                 stored here. The structure looks like this:
  50
  51                 struct timezone
  52                 {
  53                     int  tz_minuteswest; // minutes west of Greenwich
  54                     int  tz_dsttime;     // type of dst correction
  55                 };
  56
  57                 With daylight savings times defined as follows :
  58
  59                 DST_NONE        // not on dst
  60                 DST_USA         // USA style dst
  61                 DST_AUST        // Australian style dst
  62                 DST_WET         // Western European dst
  63                 DST_MET         // Middle European dst
  64                 DST_EET         // Eastern European dst
  65                 DST_CAN         // Canada
  66                 DST_GB          // Great Britain and Eire
  67                 DST_RUM         // Rumania
  68                 DST_TUR         // Turkey
  69                 DST_AUSTALT     // Australian style with shift in 1986
  70
  71                 And the following macros are defined to operate on this :
  72
  73                 timerisset(tv) - TRUE if tv contains a time
  74
  75                 timercmp(tv1, tv2, cmp) - Return the result of the
  76                         comparison "tv1 cmp tv2"
  77
  78                 timerclear(tv) - Clear the timeval struct
  79
  80     RESULT
  81         The number of seconds.
  82
  83     NOTES
  84         This function must not be used in a shared library or
  85         in a threaded application.
  86
  87     EXAMPLE
  88         struct timeval tv;
  89
  90         // Get the current time and print it
  91         gettimeofday (&tv, NULL);
  92
  93         printf ("Seconds = %ld, uSec = %ld\n", tv->tv_sec, tv->tv_usec);
  94
  95     BUGS
  96
  97     SEE ALSO
  98         ctime(), asctime(), localtime(), time()
  99
 100     INTERNALS
 101
 102 ******************************************************************************/
 103 {
 104     if (tv)
 105     {
 106         GetSysTime(tv);
 107
 108         /* Adjust with the current timezone, stored in minutes west of GMT */
 109         tv->tv_sec += (2922 * 1440 + __gmtoffset) * 60;
 110     }
 111
 112     if (tz)
 113     {
 114         tz->tz_minuteswest = __gmtoffset;
 115 #warning FIXME: set tz->tz_dsttime
 116         tz->tz_dsttime     = DST_NONE;
 117     }
 118
 119     return 0;
 120 } /* gettimeofday */
 121
 122 static int __init_timerbase(void)
 123 {
 124     __timeport.mp_Node.ln_Type   = NT_MSGPORT;
 125     __timeport.mp_Node.ln_Pri    = 0;
 126     __timeport.mp_Node.ln_Name   = NULL;
 127     __timeport.mp_Flags          = PA_IGNORE;
 128     __timeport.mp_SigTask        = FindTask(NULL);
 129     __timeport.mp_SigBit         = 0;
 130     NEWLIST(&__timeport.mp_MsgList);
 131
 132     __timereq.tr_node.io_Message.mn_Node.ln_Type    = NT_MESSAGE;
 133     __timereq.tr_node.io_Message.mn_Node.ln_Pri     = 0;
 134     __timereq.tr_node.io_Message.mn_Node.ln_Name    = NULL;
 135     __timereq.tr_node.io_Message.mn_ReplyPort       = &__timeport;
 136     __timereq.tr_node.io_Message.mn_Length          = sizeof (__timereq);
 137
 138     if
 139     (
 140         OpenDevice
 141         (
 142             "timer.device",
 143             UNIT_VBLANK,
 144             (struct IORequest *)&__timereq,
 145             0
 146         )
 147         ==
 148         0
 149     )
 150     {
 151         TimerBase = (struct Device *)__timereq.tr_node.io_Device;
 152         return 1;
 153     }
 154     else
 155     {
 156         return 0;
 157     }
 158 }
 159
 160
 161 static void __exit_timerbase(void)
 162 {
 163     if (TimerBase != NULL)
 164         CloseDevice((struct IORequest *)&__timereq);
 165 }
 166
 167 ADD2INIT(__init_timerbase, 0);
 168 ADD2EXIT(__exit_timerbase, 0);