1 (* HCoop
Domtool (http
://hcoop
.sourceforge
.net
/)
2 * Copyright (c
) 2006, Adam Chlipala
4 * This program is free software
; you can redistribute it
and/or
5 * modify it under the terms
of the GNU General Public License
6 * as published by the Free Software Foundation
; either version
2
7 * of the License
, or (at your option
) any later version
.
9 * This program is distributed
in the hope that it will be useful
,
10 * but WITHOUT ANY WARRANTY
; without even the implied warranty
of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE
. See the
12 * GNU General Public License for more details
.
14 * You should have received a copy
of the GNU General Public License
15 * along
with this program
; if not
, write to the Free Software
16 * Foundation
, Inc
., 51 Franklin Street
, Fifth Floor
, Boston
, MA
02110-1301, USA
.
19 (* Code for receiving
and executing configuration files
*)
21 structure Slave
:> SLAVE
= struct
23 datatype file_action
=
28 type file_status
= {action
: file_action
,
32 val fileHandler
= ref (fn _
: file_status
=> ())
33 val preHandler
= ref (fn () => ())
34 val postHandler
= ref (fn () => ())
36 fun registerFileHandler handler
=
38 val old
= !fileHandler
40 fileHandler
:= (fn x
=> (handler x
; old x
))
43 fun registerPreHandler handler
=
47 preHandler
:= (fn () => (handler (); old ()))
50 fun registerPostHandler handler
=
52 val old
= !postHandler
54 postHandler
:= (fn () => (handler (); old ()))
57 fun handleChanges fs
= (!preHandler ();
58 app (!fileHandler
) fs
;