libgloss/arc/hl/hl_gettimeofday.c

   1 /*
   2  * hl_gettimeofday.c -- provide _gettimeofday().
   3  *
   4  * Copyright (c) 2024 Synopsys Inc.
   5  *
   6  * The authors hereby grant permission to use, copy, modify, distribute,
   7  * and license this software and its documentation for any purpose, provided
   8  * that existing copyright notices are retained in all copies and that this
   9  * notice is included verbatim in any distributions. No written agreement,
  10  * license, or royalty fee is required for any of the authorized uses.
  11  * Modifications to this software may be copyrighted by their authors
  12  * and need not follow the licensing terms described here, provided that
  13  * the new terms are clearly indicated on the first page of each file where
  14  * they apply.
  15  *
  16  */
  17
  18 #include <errno.h>
  19 #include <stdint.h>
  20 #include <string.h>
  21 #include <sys/time.h>
  22
  23 #include "hl_toolchain.h"
  24 #include "hl_api.h"
  25
  26 /* Get host time().  Implements HL_SYSCALL_TIME.  */
  27 static __always_inline int
  28 _hl_time (uint32_t *host_timer)
  29 {
  30   int ret;
  31   volatile __uncached char *p;
  32
  33   p = _hl_message (HL_SYSCALL_TIME, ":i", (uint32_t *) host_timer);
  34
  35   if (p == NULL)
  36     {
  37       errno = ETIMEDOUT;
  38       ret = -1;
  39     }
  40   else
  41     {
  42       ret = 0;
  43     }
  44
  45   _hl_delete ();
  46
  47   return ret;
  48 }
  49
  50 /* gettimeofday() implementation.  Clears *tz if specified.  */
  51 int
  52 _gettimeofday (struct timeval *tv, struct timezone *tz)
  53 {
  54   int ret;
  55   uint32_t host_timer;
  56
  57   if (tz)
  58     memset (tz, 0, sizeof (*tz));
  59
  60   ret = _hl_time (&host_timer);
  61
  62   if (ret == 0)
  63     {
  64       tv->tv_sec = host_timer;
  65       tv->tv_usec = 0;
  66     }
  67
  68   return ret;
  69 }