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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
type state = {
exported : IS.set,
export_decls : decl list
}
fun frob file =
let
val rpcBaseIds = foldl (fn ((d, _), rpcIds) =>
case d of
DVal (_, n, _, (EFfi ("Basis", "rpc"), _), _) => IS.add (rpcIds, n)
| DVal (_, n, _, (ENamed n', _), _) => if IS.member (rpcIds, n') then
IS.add (rpcIds, n)
else
rpcIds
| _ => rpcIds)
IS.empty file
val tfuncs = foldl
(fn ((d, _), tfuncs) =>
let
fun doOne ((x, n, t, e, _), tfuncs) =
let
val loc = #2 e
fun crawl (t, e, args) =
case (#1 t, #1 e) of
(CApp (_, ran), _) =>
SOME (x, rev args, ran, e)
| (TFun (arg, rest), EAbs (x, _, _, e)) =>
crawl (rest, e, (x, arg) :: args)
| (TFun (arg, rest), _) =>
crawl (rest, (EApp (e, (ERel (length args), loc)), loc), ("x", arg) :: args)
| _ => NONE
in
case crawl (t, e, []) 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) =
let
fun getApp (e', args) =
case e' of
ENamed n => SOME (n, args)
| EApp (e1, e2) => getApp (#1 e1, e2 :: args)
| _ => NONE
fun newRpc (trans : exp, st : state) =
case getApp (#1 trans, []) of
NONE => (ErrorMsg.errorAt (#2 trans)
"RPC code doesn't use a named function or transaction";
(#1 trans, st))
| SOME (n, args) =>
case IM.find (tfuncs, n) of
NONE => ((*Print.prefaces "BAD" [("e", CorePrint.p_exp CoreEnv.empty (e, loc))];*)
raise Fail ("Rpcify: Undetected transaction function " ^ Int.toString n))
| SOME (_, _, ran, _) =>
let
val loc = #2 trans
val (exported, export_decls) =
if IS.member (#exported st, n) then
(#exported st, #export_decls st)
else
(IS.add (#exported st, n),
(DExport (Rpc ReadWrite, n), loc) :: #export_decls st)
val st = {exported = exported,
export_decls = export_decls}
val e' = EServerCall (n, args, ran)
in
(e', st)
end
in
case e of
EApp ((ECApp ((EFfi ("Basis", "rpc"), _), ran), _), trans) => newRpc (trans, st)
| EApp ((ECApp ((ENamed n, _), ran), _), trans) =>
if IS.member (rpcBaseIds, n) then
newRpc (trans, st)
else
(e, st)
| _ => (e, st)
end
and doExp (e, st) = U.Exp.foldMap {kind = fn x => x,
con = fn x => x,
exp = exp} st (ReduceLocal.reduceExp e)
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
(#export_decls st @ [d],
{exported = #exported st,
export_decls = []})
end
val (file, _) = ListUtil.foldlMapConcat decl
{exported = IS.empty,
export_decls = []}
file
in
file
end
end
|
