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authorManoj Srivastava <srivasta@debian.org>2008-05-30 12:42:47 -0700
committerManoj Srivastava <srivasta@debian.org>2008-05-30 12:42:47 -0700
commitceb3507a8fca872770b3dcd7e5c5b36179ab95b0 (patch)
treeb46b4e25cfff5f4c13a330b8428ceed343e3796c /mcon/U/d_ftime.U
Import dist_3.5-236.orig.tar.gz
[dgit import orig dist_3.5-236.orig.tar.gz]
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+?RCS: $Id$
+?RCS:
+?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi
+?RCS:
+?RCS: You may redistribute only under the terms of the Artistic License,
+?RCS: as specified in the README file that comes with the distribution.
+?RCS: You may reuse parts of this distribution only within the terms of
+?RCS: that same Artistic License; a copy of which may be found at the root
+?RCS: of the source tree for dist 4.0.
+?RCS:
+?RCS: $Log: d_ftime.U,v $
+?RCS: Revision 3.0 1993/08/18 12:06:06 ram
+?RCS: Baseline for dist 3.0 netwide release.
+?RCS:
+?MAKE:d_ftime d_gettimeod: Trylink cat i_systimeb
+?MAKE: -pick add $@ %<
+?S:d_ftime:
+?S: This variable conditionally defines the HAS_FTIME symbol, which indicates
+?S: that the ftime() routine exists. The ftime() routine is basically
+?S: a sub-second accuracy clock.
+?S:.
+?S:d_gettimeod:
+?S: This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
+?S: indicates that the gettimeofday() system call exists (to obtain a
+?S: sub-second accuracy clock). You should probably include <sys/resource.h>.
+?S:.
+?C:HAS_FTIME (FTIMER):
+?C: This symbol, if defined, indicates that the ftime() routine exists.
+?C: It is basically a sub-second accuracy clock, but is less accurate
+?C: than gettimeofday(2) anyway. The type "Timeval" should be used to
+?C: refer to "struct timeb".
+?C:.
+?C:HAS_GETTIMEOFDAY (GETTIMEOFDAY):
+?C: This symbol, if defined, indicates that the gettimeofday() system
+?C: call is available for a sub-second accuracy clock. Usually, the file
+?C: <sys/resource.h> needs to be included (see I_SYS_RESOURCE).
+?C: The type "Timeval" should be used to refer to "struct timeval".
+?C:.
+?H:#$d_ftime HAS_FTIME /**/
+?H:#$d_gettimeod HAS_GETTIMEOFDAY /**/
+?H:?%<:@if HAS_FTIME
+?H:?%<:#ifdef HAS_FTIME
+?H:?%<:#define Timeval struct timeb /* Structure used by ftime() */
+?H:?%<:#endif
+?H:?%<:@end
+?H:?%<:@if HAS_GETTIMEOFDAY
+?H:?%<:#ifdef HAS_GETTIMEOFDAY
+?H:?%<:#define Timeval struct timeval /* Structure used by gettimeofday() */
+?H:?%<:#endif
+?H:?%<:@end
+?H:.
+?X:FIXME
+?X:?I:?d_ftime:i_systimeb
+?X:?I:?d_gettimeod:i_sysresrc
+?LINT:set d_gettimeod d_ftime
+?LINT:known Timeval
+: see if gettimeofday or ftime exists
+?X:
+?X: Give priority to gettimeofday(2) because timing is more accurate
+?X:
+$cat >try.c <<EOC
+#include <sys/time.h>
+int main(void)
+{
+ static struct timeval tv;
+ static void *tz;
+ static int ret;
+ ret |= gettimeofday(&tv, tz);
+ return ret ? 0 : 1;
+}
+EOC
+cyn=gettimeofday
+set d_gettimeod
+eval $trylink
+
+$cat >try.c <<EOC
+#include <sys/types.h>
+#$i_systimeb I_SYS_TIMEB
+#ifdef I_SYS_TIMEB
+#include <sys/timeb.h>
+#endif
+int main(void)
+{
+ static struct timeb t;
+ static int ret;
+ ret |= ftime(&t);
+ return ret ? 0 : 1;
+}
+EOC
+cyn=ftime
+set d_ftime
+eval $trylink
+
+case "$d_gettimeod$d_ftime" in
+"$undef$undef")
+ echo " "
+ echo 'No ftime() nor gettimeofday() -- timing may be less accurate.' >&4
+ ;;
+esac
+