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[metaconfig.git] / dist / U / d_ftime.U

?RCS: $Id: d_ftime.U 1 2006-08-24 12:32:52Z rmanfredi $
?RCS:
?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi
?RCS: 
?RCS: You may redistribute only under the terms of the Artistic Licence,
?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 Licence; 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: Inlibc Setvar
?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:
set gettimeofday d_gettimeod
eval $inlibc
case "$d_gettimeod" in
"$undef")
	set ftime d_ftime 
	eval $inlibc
	;;
*)
	val="$undef"; set d_ftime; eval $setvar
	;;
esac
case "$d_gettimeod$d_ftime" in
"$undef$undef")
	echo " "
	echo 'No ftime() nor gettimeofday() -- timing may be less accurate.' >&4
	;;
esac