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NSH: Add a time command that can be used to time other commands

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This commit is contained in:
Gregory Nutt
2015-12-31 09:16:38 -06:00
parent d5f8008931
commit f09b7e400f
6 changed files with 105 additions and 10 deletions
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69
nshlib/nsh_timcmds.c
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@@ -53,9 +53,11 @@
#define MAX_TIME_STRING 80
/****************************************************************************
* Private Types
****************************************************************************/
#ifdef CONFIG_CLOCK_MONOTONIC
# define TIME_CLOCK CLOCK_MONOTONIC
#else
# define TIME_CLOCK CLOCK_REALTIME
#endif
/****************************************************************************
* Private Function Prototypes
@@ -283,6 +285,67 @@ errout_bad_parm:
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: cmd_time
****************************************************************************/
#ifndef CONFIG_NSH_DISABLE_TIME
int cmd_time(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
{
struct timespec start;
bool bgsave;
bool redirsave;
int ret;
/* Get the current time */
ret = clock_gettime(TIME_CLOCK, &start);
if (ret < 0)
{
nsh_output(vtbl, g_fmtcmdfailed, argv[0], "clock_gettime", NSH_ERRNO);
return ERROR;
}
/* Save state */
bgsave = vtbl->np.np_bg;
redirsave = vtbl->np.np_redirect;
/* Execute the command */
ret = nsh_parse(vtbl, argv[1]);
if (ret >= 0)
{
struct timespec end;
struct timespec diff;
ret = clock_gettime(TIME_CLOCK, &end);
if (ret < 0)
{
nsh_output(vtbl, g_fmtcmdfailed, argv[0], "clock_gettime", NSH_ERRNO);
ret = ERROR;
}
else
{
diff.tv_sec = end.tv_sec - start.tv_sec;
if (start.tv_nsec > end.tv_nsec)
{
diff.tv_sec--;
end.tv_nsec += 1000000000;
}
diff.tv_nsec = end.tv_nsec - start.tv_nsec;
nsh_output(vtbl, "\n%lu.%04lu sec\n", (unsigned long)diff.tv_sec,
(unsigned long)diff.tv_nsec / 10000000);
}
}
vtbl->np.np_bg = bgsave;
vtbl->np.np_redirect = redirsave;
return ret;
}
#endif
/****************************************************************************
* Name: cmd_date
****************************************************************************/