import property-set ;
import feature : feature ;

feature threadapi : win32 pthread : optional propagated ;

rule get-default ( property-set )
{
	local api = pthread ;
	if [ $(property-set).get <target-os> ] = windows { api = win32 ; }
	return $(api) ;
}

rule detect ( properties * )
{
	local ps = [ property-set.create $(properties) ] ;
	local api = [ $(ps).get <threadapi> ] ;
	if ! $(api) { api = [ get-default $(ps) ] ; }
	return <threadapi>$(api) ;
}