BerkeleyDB-Locks
    
    
  
  
  
view release on metacpan or search on metacpan
		-Flags => DB_CREATE,
		-Filename => 'dbfoo',
		;
	local $SIG{ALRM} = sub { $flag = undef } ;
	$db{test} = 'failed' ;
	print stderr "  attempting read lock...\n" ;
	my ( $k, $v ) ;
	my $c = $db->db_cursor ;
	$c->c_get( $k, $v, DB_FIRST ) ;
	alarm( 4 ) ;
	while ( $flag ) {
		sleep 1 ;
		}
	alarm( 0 ) ;
	## don't know how to get this to display correctly...
	ok( $db{test}, 'ok' ) ;
    
  
  
  
( run in 0.361 second using v1.01-cache-2.11-cpan-a1d94b6210f )