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(* Copyright (c) 2009, Adam Chlipala
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - The names of contributors may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*)
structure Rpcify :> RPCIFY = struct
open Core
structure U = CoreUtil
structure E = CoreEnv
structure IS = IntBinarySet
structure IM = IntBinaryMap
structure SS = BinarySetFn(struct
type ord_key = string
val compare = String.compare
end)
val ssBasis = SS.addList (SS.empty,
["requestHeader",
"query",
"dml",
"nextval"])
val csBasis = SS.addList (SS.empty,
["source",
"get",
"set",
"alert"])
type state = {
cpsed : int IM.map,
cps_decls : (string * int * con * exp * string) list,
exported : IS.set,
export_decls : decl list
}
fun frob file =
let
fun sideish (basis, ssids) =
U.Exp.exists {kind = fn _ => false,
con = fn _ => false,
exp = fn ENamed n => IS.member (ssids, n)
| EFfi ("Basis", x) => SS.member (basis, x)
| EFfiApp ("Basis", x, _) => SS.member (basis, x)
| _ => false}
fun whichIds basis =
let
fun decl ((d, _), ssids) =
let
val impure = sideish (basis, ssids)
in
case d of
DVal (_, n, _, e, _) => if impure e then
IS.add (ssids, n)
else
ssids
| DValRec xes => if List.exists (fn (_, _, _, e, _) => impure e) xes then
foldl (fn ((_, n, _, _, _), ssids) => IS.add (ssids, n))
ssids xes
else
ssids
| _ => ssids
end
in
foldl decl IS.empty file
end
val ssids = whichIds ssBasis
val csids = whichIds csBasis
val serverSide = sideish (ssBasis, ssids)
val clientSide = sideish (csBasis, csids)
val tfuncs = foldl
(fn ((d, _), tfuncs) =>
let
fun doOne ((_, n, t, _, _), tfuncs) =
let
fun crawl (t, args) =
case #1 t of
CApp ((CFfi ("Basis", "transaction"), _), ran) => SOME (rev args, ran)
| TFun (arg, rest) => crawl (rest, arg :: args)
| _ => NONE
in
case crawl (t, []) of
NONE => tfuncs
| SOME sg => IM.insert (tfuncs, n, sg)
end
in
case d of
DVal vi => doOne (vi, tfuncs)
| DValRec vis => foldl doOne tfuncs vis
| _ => tfuncs
end)
IM.empty file
fun exp (e, st) =
case e of
EApp (
(EApp
((EApp ((ECApp ((ECApp ((ECApp ((EFfi ("Basis", "bind"), loc), _), _), t1), _), t2), _),
(EFfi ("Basis", "transaction_monad"), _)), _),
trans1), _),
trans2) =>
(case (serverSide trans1, clientSide trans1, serverSide trans2, clientSide trans2) of
(true, false, false, true) =>
let
fun getApp (e, args) =
case #1 e of
ENamed n => (n, args)
| EApp (e1, e2) => getApp (e1, e2 :: args)
| _ => (ErrorMsg.errorAt loc "Mixed client/server code doesn't use a named function for server part";
(0, []))
val (n, args) = getApp (trans1, [])
val (exported, export_decls) =
if IS.member (#exported st, n) then
(#exported st, #export_decls st)
else
(IS.add (#exported st, n),
(DExport (Rpc, n), loc) :: #export_decls st)
val st = {cpsed = #cpsed st,
cps_decls = #cps_decls st,
exported = exported,
export_decls = export_decls}
val ran =
case IM.find (tfuncs, n) of
NONE => (Print.prefaces "BAD" [("e", CorePrint.p_exp CoreEnv.empty (e, loc))];
raise Fail "Rpcify: Undetected transaction function")
| SOME (_, ran) => ran
in
(EServerCall (n, args, trans2, ran), st)
end
| _ => (e, st))
| _ => (e, st)
fun decl (d, st : state) =
let
val (d, st) = U.Decl.foldMap {kind = fn x => x,
con = fn x => x,
exp = exp,
decl = fn x => x}
st d
in
(List.revAppend (case #cps_decls st of
[] => [d]
| ds =>
case d of
(DValRec vis, loc) => [(DValRec (ds @ vis), loc)]
| (_, loc) => [d, (DValRec ds, loc)],
#export_decls st),
{cpsed = #cpsed st,
cps_decls = [],
exported = #exported st,
export_decls = []})
end
val (file, _) = ListUtil.foldlMapConcat decl
{cpsed = IM.empty,
cps_decls = [],
exported = IS.empty,
export_decls = []}
file
in
file
end
end
|
