Hi, some targets such as VXWorks don't provide gettimeofday but do provide clock_gettime. The attached patch allows such targets to get better resolution for the DATE_AND_TIME (up to the 1 millisecond limit of the API) intrinsic than the 1 second resolution provided by the current fallback of using the C standard time().
(SYSTEM_CLOCK already uses clock_gettime if available and thus
nanosecond resultion has been available to vxworks also before this
patch.)
Ok for trunk? (Patch both inline below and as an attachment)
2012-05-23 Janne Blomqvist <j...@gcc.gnu.org>
PR fortran/53456
* intrinsics/time_1.h (gf_gettime): Fallback for clock_gettime.
diff --git a/libgfortran/intrinsics/time_1.h b/libgfortran/intrinsics/time_1.h
index aaca56a..ca5b26b 100644
--- a/libgfortran/intrinsics/time_1.h
+++ b/libgfortran/intrinsics/time_1.h
@@ -181,8 +181,8 @@ gf_cputime (long *user_sec, long *user_usec, long
*system_sec, long *system_usec
#endif
-/* Realtime clock with microsecond resolution, falling back to less
- precise functions if the target does not support gettimeofday().
+/* Realtime clock with microsecond resolution, falling back to other
+ functions if the target does not support gettimeofday().
Arguments:
secs - OUTPUT, seconds
@@ -204,6 +204,12 @@ gf_gettime (time_t * secs, long * usecs)
*secs = tv.tv_sec;
*usecs = tv.tv_usec;
return err;
+#elif defined(HAVE_CLOCK_GETTIME)
+ struct timespec ts;
+ int err = clock_gettime (CLOCK_REALTIME, &ts);
+ *secs = ts.tv_sec;
+ *usecs = ts.tv_nsec / 1000;
+ return err;
#else
time_t t = time (NULL);
*secs = t;
--
Janne Blomqvist
vxtime.diff
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