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[metaconfig.git] / U / threads / d_pthrattrj.U

?RCS: $Id: d_pthrattrj.U,v $
?RCS:
?RCS: Copyright (c) 1998 Jarkko Hietaniemi
?RCS:
?RCS: You may distribute under the terms of either the GNU General Public
?RCS: License or the Artistic License, as specified in the README file.
?RCS:
?MAKE:d_old_pthread_create_joinable old_pthread_create_joinable: \
	cat Compile rm Setvar usethreads i_pthread
?MAKE:	-pick add $@ %<
?S:d_old_pthread_create_joinable:
?S:	This variable conditionally defines pthread_create_joinable.
?S:	undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
?S:.
?S:old_pthread_create_joinable:
?S:	This variable defines the constant to use for creating joinable
?S:	(aka undetached) pthreads.  Unused if pthread.h defines
?S:	PTHREAD_CREATE_JOINABLE.  If used, possible values are
?S:	PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
?S:.
?C:OLD_PTHREAD_CREATE_JOINABLE:
?C:	This symbol, if defined, indicates how to create pthread
?C:	in joinable (aka undetached) state.  NOTE: not defined
?C:	if pthread.h already has defined PTHREAD_CREATE_JOINABLE
?C:	(the new version of the constant).
?C:	If defined, known values are PTHREAD_CREATE_UNDETACHED
?C:	and __UNDETACHED.
?C:.
?H:#$d_old_pthread_create_joinable OLD_PTHREAD_CREATE_JOINABLE $old_pthread_create_joinable /**/
?H:.
?LINT: set d_old_pthread_create_joinable
?LINT: set old_pthread_create_joinable
: how to create joinable pthreads
if test "X$usethreads" = "X$define" -a "X$i_pthread" = "X$define"; then
	echo " "
	echo "Checking what constant to use for creating joinable pthreads..." >&4 
	$cat >try.c <<'EOCP'
#include <pthread.h>
int main() {
    int detachstate = JOINABLE;
}
EOCP
	set try -DJOINABLE=PTHREAD_CREATE_JOINABLE
	if eval $compile; then
		echo "You seem to use PTHREAD_CREATE_JOINABLE." >&4
		val="$undef" # Yes, undef.
		set d_old_pthread_create_joinable
		eval $setvar
		val=""
		set old_pthread_create_joinable
		eval $setvar
	else
		set try -DJOINABLE=PTHREAD_CREATE_UNDETACHED
		if eval $compile; then
			echo "You seem to use PTHREAD_CREATE_UNDETACHED." >&4
			val="$define"
			set d_old_pthread_create_joinable
			eval $setvar
			val=PTHREAD_CREATE_UNDETACHED
			set old_pthread_create_joinable
			eval $setvar
		else		
			set try -DJOINABLE=__UNDETACHED
			if eval $compile; then
				echo "You seem to use __UNDETACHED." >&4
				val="$define"
				set d_old_pthread_create_joinable
				eval $setvar
				val=__UNDETACHED
				set old_pthread_create_joinable
				eval $setvar
			else
				echo "Egads, nothing obvious found.  Guessing that you use 0." >&4
				val="$define"
				set d_old_pthread_create_joinable
				eval $setvar
				val=0
				set old_pthread_create_joinable
				eval $setvar
			fi
		fi
	fi
	$rm -f try try.*
else
    d_old_pthread_create_joinable="$undef"
    old_pthread_create_joinable=""
fi