compiler/posixc/clock_gettime.c

   1 /*
   2     Copyright © 2008-2018, The AROS Development Team. All rights reserved.
   3     $Id$
   4     POSIX.1-2001 function clock_gettime().
   5 */
   6
   7 #include <proto/exec.h>
   8 #include <proto/timer.h>
   9 #include <errno.h>
  10
  11 #include "__posixc_time.h"
  12
  13 /*****************************************************************************
  14     NAME */
  15 #include <time.h>
  16
  17     int clock_gettime (
  18
  19 /*  SYNOPSIS */
  20     clockid_t clk_id,
  21     struct timespec *tp)
  22
  23 /*  FUNCTION
  24         retrieve the time of the specified clock clk_id.
  25
  26     INPUTS
  27         clk_id - identifier of the particular clock on which to act
  28                 CLOCK_REALTIME
  29                 System-wide realtime clock. Setting this clock requires appropriate privileges.
  30                 CLOCK_MONOTONIC
  31                 Clock that cannot be set and represents monotonic time since some unspecified starting point.
  32                 CLOCK_PROCESS_CPUTIME_ID
  33                 High-resolution per-process timer from the CPU.
  34                 CLOCK_THREAD_CPUTIME_ID
  35                 Thread-specific CPU-time clock.
  36         tp - structure to hold the retrieved time value
  37
  38     RESULT
  39         0 on success, -1 on error
  40
  41     NOTES
  42         Currently at most a resolution of milliseconds is supported.
  43
  44     EXAMPLE
  45
  46     BUGS
  47
  48     SEE ALSO
  49
  50     INTERNALS
  51
  52 ******************************************************************************/
  53 {
  54     struct PosixCIntBase *PosixCBase = (struct PosixCIntBase *)__aros_getbase_PosixCBase();
  55     int retval = -1;
  56
  57     if (!TimerBase)
  58         __init_timerbase(PosixCBase);
  59
  60     switch(clk_id)
  61     {
  62         case CLOCK_REALTIME:
  63         {
  64             if (TimerBase)
  65             {
  66                 struct timeval tv;
  67                 GetSysTime(&tv);
  68                 tp->tv_sec  = tv.tv_sec;
  69                 tp->tv_nsec = tv.tv_usec * 1000;
  70                 retval = 0;
  71             }
  72             else
  73             {
  74                 errno = EACCES;
  75             }
  76             break;
  77         }
  78
  79         case CLOCK_MONOTONIC:
  80         {
  81             if (TimerBase)
  82             {
  83                 struct timeval tv;
  84                 GetUpTime(&tv);
  85                 tp->tv_sec  = tv.tv_sec;
  86                 tp->tv_nsec = tv.tv_usec * 1000;
  87                 retval = 0;
  88             }
  89             else
  90             {
  91                 errno = EACCES;
  92             }
  93             break;
  94         }
  95
  96         default:
  97             errno = EINVAL;
  98             break;
  99     }
 100
 101
 102     return retval;
 103 } /* clock_gettime() */