summaryrefslogtreecommitdiff
path: root/src/rpcify.sml
blob: dc8ecc52603d38af32c717a171a27fe7cc33e2c7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
(* 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)

fun multiLiftExpInExp n e =
    if n = 0 then
        e
    else
        multiLiftExpInExp (n - 1) (E.liftExpInExp 0 e)

val ssBasis = SS.addList (SS.empty,
                          ["requestHeader",
                           "query",
                           "dml",
                           "nextval",
                           "channel",
                           "subscribe",
                           "send"])

val csBasis = SS.addList (SS.empty,
                          ["get",
                           "set",
                           "alert",
                           "recv"])

type state = {
     cpsed : int IM.map,
     cpsed_range : con IM.map,
     cps_decls : (string * int * con * exp * string) list,

     exported : IS.set,
     export_decls : decl list,

     maxName : int
}

fun frob file =
    let
        fun sideish (basis, ssids) e =
            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}
                         (U.Exp.map {kind = fn x => x,
                                     con = fn x => x,
                                     exp = fn ERecord _ => ERecord []
                                            | x => x} e)

        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

        fun sideish' (basis, ids) extra =
            sideish (basis, IM.foldli (fn (id, _, ids) => IS.add (ids, id)) ids extra)

        val serverSide = sideish' (ssBasis, ssids)
        val clientSide = sideish' (csBasis, csids)

        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) =
                    let
                        val loc = #2 e'
                    in
                        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";
                                  (*Print.prefaces "Bad" [("e", CorePrint.p_exp CoreEnv.empty (e, ErrorMsg.dummySpan))];*)
                                  (0, []))
                    end

                fun newRpc (trans1, trans2, st : state) =
                    let
                        val loc = #2 trans1

                        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,
                                  cpsed_range = #cpsed_range st,
                                  cps_decls = #cps_decls st,

                                  exported = exported,
                                  export_decls = export_decls,

                                  maxName = #maxName st}

                        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 " ^ Int.toString n))
                              | SOME (_, _, ran, _) => ran

                        val e' = EServerCall (n, args, trans2, ran)
                    in
                        (e', st)
                    end

                fun newCps (t1, t2, trans1, trans2, st) =
                    let
                        val loc = #2 trans1

                        val (n, args) = getApp (trans1, [])

                        fun makeCall n' =
                            let
                                val e = (ENamed n', loc)
                                val e = (EApp (e, trans2), loc)
                            in
                                #1 (foldl (fn (arg, e) => (EApp (e, arg), loc)) e args)
                            end
                    in
                        case IM.find (#cpsed_range st, n) of
                            SOME kdom =>
                            (case args of
                                 [] => raise Fail "Rpcify: cps'd function lacks first argument"
                               | ke :: args =>
                                 let
                                     val ke' = (EFfi ("Basis", "bind"), loc)
                                     val ke' = (ECApp (ke', (CFfi ("Basis", "transaction"), loc)), loc)
                                     val ke' = (ECApp (ke', kdom), loc)
                                     val ke' = (ECApp (ke', t2), loc)
                                     val ke' = (EApp (ke', (EFfi ("Basis", "transaction_monad"), loc)), loc)
                                     val ke' = (EApp (ke', (EApp (E.liftExpInExp 0 ke, (ERel 0, loc)), loc)), loc)
                                     val ke' = (EApp (ke', E.liftExpInExp 0 trans2), loc)
                                     val ke' = (EAbs ("x", kdom,
                                                      (CApp ((CFfi ("Basis", "transaction"), loc), t2), loc),
                                                      ke'), loc)

                                     val e' = (ENamed n, loc)
                                     val e' = (EApp (e', ke'), loc)
                                     val e' = foldl (fn (arg, e') => (EApp (e', arg), loc)) e' args
                                     val (e', st) = doExp (e', st)
                                 in
                                     (#1 e', st)
                                 end)
                          | NONE =>
                            case IM.find (#cpsed st, n) of
                                SOME n' => (makeCall n', st)
                              | NONE =>
                                let
                                    val (name, fargs, ran, e) =
                                        case IM.find (tfuncs, n) of
                                            NONE => (Print.prefaces "BAD" [("e",
                                                                            CorePrint.p_exp CoreEnv.empty (e, loc))];
                                                     raise Fail "Rpcify: Undetected transaction function [2]")
                                          | SOME x => x
                                                      
                                    val n' = #maxName st

                                    val st = {cpsed = IM.insert (#cpsed st, n, n'),
                                              cpsed_range = IM.insert (#cpsed_range st, n', ran),
                                              cps_decls = #cps_decls st,
                                              exported = #exported st,
                                              export_decls = #export_decls st,
                                              maxName = n' + 1}

                                    val unit = (TRecord (CRecord ((KType, loc), []), loc), loc)
                                    val body = (EFfi ("Basis", "bind"), loc)
                                    val body = (ECApp (body, (CFfi ("Basis", "transaction"), loc)), loc)
                                    val body = (ECApp (body, t1), loc)
                                    val body = (ECApp (body, unit), loc)
                                    val body = (EApp (body, (EFfi ("Basis", "transaction_monad"), loc)), loc)
                                    val body = (EApp (body, e), loc)
                                    val body = (EApp (body, (ERel (length args), loc)), loc)
                                    val bt = (CApp ((CFfi ("Basis", "transaction"), loc), unit), loc)
                                    val (body, bt) = foldr (fn ((x, t), (body, bt)) =>
                                                               ((EAbs (x, t, bt, body), loc),
                                                                (TFun (t, bt), loc)))
                                                           (body, bt) fargs
                                    val kt = (TFun (ran, (CApp ((CFfi ("Basis", "transaction"), loc),
                                                                unit),
                                                          loc)), loc)
                                    val body = (EAbs ("k", kt, bt, body), loc)
                                    val bt = (TFun (kt, bt), loc)

                                    val (body, st) = doExp (body, st)

                                    val vi = (name ^ "_cps",
                                              n',
                                              bt,
                                              body,
                                              "")

                                    val st = {cpsed = #cpsed st,
                                              cpsed_range = #cpsed_range st,
                                              cps_decls = vi :: #cps_decls st,
                                              exported = #exported st,
                                              export_decls = #export_decls st,
                                              maxName = #maxName st}
                                in
                                    (makeCall n', st)
                                end
                    end

                fun dummyK loc =
                    let
                        val unit = (TRecord (CRecord ((KType, loc), []), loc), loc)
                                   
                        val k = (EFfi ("Basis", "return"), loc)
                        val k = (ECApp (k, (CFfi ("Basis", "transaction"), loc)), loc)
                        val k = (ECApp (k, unit), loc)
                        val k = (EApp (k, (EFfi ("Basis", "transaction_monad"), loc)), loc)
                        val k = (EApp (k, (ERecord [], loc)), loc)
                    in
                        (EAbs ("_", unit, unit, k), loc)
                    end
            in
                case e of
                    EApp (
                    (EApp
                         ((EApp ((ECApp ((ECApp ((ECApp ((EFfi ("Basis", "bind"), loc), _), _), t1), _), t2), _),
                                 (EFfi ("Basis", "transaction_monad"), _)), _),
                          (ECase (ed, pes, {disc, ...}), _)), _),
                    trans2) =>
                    let
                        val e' = (EFfi ("Basis", "bind"), loc)
                        val e' = (ECApp (e', (CFfi ("Basis", "transaction"), loc)), loc)
                        val e' = (ECApp (e', t1), loc)
                        val e' = (ECApp (e', t2), loc)
                        val e' = (EApp (e', (EFfi ("Basis", "transaction_monad"), loc)), loc)

                        val (pes, st) = ListUtil.foldlMap (fn ((p, e), st) =>
                                                              let
                                                                  val e' = (EApp (e', e), loc)
                                                                  val e' = (EApp (e',
                                                                                  multiLiftExpInExp (E.patBindsN p)
                                                                                                    trans2), loc)
                                                                  val (e', st) = doExp (e', st)
                                                              in
                                                                  ((p, e'), st)
                                                              end) st pes
                    in
                        (ECase (ed, pes, {disc = disc,
                                          result = (CApp ((CFfi ("Basis", "transaction"), loc), t2), loc)}),
                         st)
                    end

                  | EApp (
                    (EApp
                         ((EApp ((ECApp ((ECApp ((ECApp ((EFfi ("Basis", "bind"), loc), _), _), t1), _), t2), _),
                                 (EFfi ("Basis", "transaction_monad"), _)), _),
                          (EServerCall (n, es, ke, t), _)), _),
                    trans2) =>
                    let
                        val e' = (EFfi ("Basis", "bind"), loc)
                        val e' = (ECApp (e', (CFfi ("Basis", "transaction"), loc)), loc)
                        val e' = (ECApp (e', t), loc)
                        val e' = (ECApp (e', t2), loc)
                        val e' = (EApp (e', (EFfi ("Basis", "transaction_monad"), loc)), loc)
                        val e' = (EApp (e', (EApp (E.liftExpInExp 0 ke, (ERel 0, loc)), loc)), loc)
                        val e' = (EApp (e', E.liftExpInExp 0 trans2), loc)
                        val e' = (EAbs ("x", t, t2, e'), loc)
                        val e' = (EServerCall (n, es, e', t), loc)
                        val (e', st) = doExp (e', st)
                    in
                        (#1 e', st)
                    end

                  | EApp (
                    (EApp
                         ((EApp ((ECApp ((ECApp ((ECApp ((EFfi ("Basis", "bind"), loc), _), _), _), _), t3), _),
                                 (EFfi ("Basis", "transaction_monad"), _)), _),
                          (EApp ((EApp
                                      ((EApp ((ECApp ((ECApp ((ECApp ((EFfi ("Basis", "bind"), _), _), _), t1), _), t2), _),
                                              (EFfi ("Basis", "transaction_monad"), _)), _),
                                       trans1), _), trans2), _)), _),
                    trans3) =>
                    let
                        val e'' = (EFfi ("Basis", "bind"), loc)
                        val e'' = (ECApp (e'', (CFfi ("Basis", "transaction"), loc)), loc)
                        val e'' = (ECApp (e'', t2), loc)
                        val e'' = (ECApp (e'', t3), loc)
                        val e'' = (EApp (e'', (EFfi ("Basis", "transaction_monad"), loc)), loc)
                        val e'' = (EApp (e'', (EApp (E.liftExpInExp 0 trans2, (ERel 0, loc)), loc)), loc)
                        val e'' = (EApp (e'', E.liftExpInExp 0 trans3), loc)
                        val e'' = (EAbs ("x", t1, (CApp ((CFfi ("Basis", "transaction"), loc), t3), loc), e''), loc)

                        val e' = (EFfi ("Basis", "bind"), loc)
                        val e' = (ECApp (e', (CFfi ("Basis", "transaction"), loc)), loc)
                        val e' = (ECApp (e', t1), loc)
                        val e' = (ECApp (e', t3), loc)
                        val e' = (EApp (e', (EFfi ("Basis", "transaction_monad"), loc)), loc)
                        val e' = (EApp (e', trans1), loc)
                        val e' = (EApp (e', e''), loc)
                        val (e', st) = doExp (e', st)
                    in
                        (#1 e', st)
                    end

                  | EApp (
                    (EApp
                         ((EApp ((ECApp ((ECApp ((ECApp ((EFfi ("Basis", "bind"), _), _), _), _), _), _), _),
                                 (EFfi ("Basis", "transaction_monad"), _)), _),
                          _), loc),
                    (EAbs (_, _, _, (EWrite _, _)), _)) => (e, st)

                  | EApp (
                    (EApp
                         ((EApp ((ECApp ((ECApp ((ECApp ((EFfi ("Basis", "bind"), _), _), _), t1), _), t2), _),
                                 (EFfi ("Basis", "transaction_monad"), _)), _),
                          trans1), loc),
                    trans2) =>
                    (case (serverSide (#cpsed_range st) trans1, clientSide (#cpsed_range st) trans1,
                           serverSide (#cpsed_range st) trans2, clientSide (#cpsed_range st) trans2) of
                         (true, false, _, true) => newRpc (trans1, trans2, st)
                       | (_, true, true, false) =>
                         (case #1 trans2 of
                              EAbs (x, dom, ran, trans2) =>
                              let
                                  val (trans2, st) = newRpc (trans2, dummyK loc, st)
                                  val trans2 = (EAbs (x, dom, ran, (trans2, loc)), loc)

                                  val e = (EFfi ("Basis", "bind"), loc)
                                  val e = (ECApp (e, (CFfi ("Basis", "transaction"), loc)), loc)
                                  val e = (ECApp (e, t1), loc)
                                  val e = (ECApp (e, t2), loc)
                                  val e = (EApp (e, (EFfi ("Basis", "transaction_monad"), loc)), loc)
                                  val e = (EApp (e, trans1), loc)
                                  val e = EApp (e, trans2)
                              in
                                  (e, st)
                              end
                            | _ => (e, st))
                       | (true, true, _, _) => newCps (t1, t2, trans1, trans2, st)

                       | _ => (e, st))

                  | ERecord xes =>
                    let
                        val loc = case xes of
                                      [] => ErrorMsg.dummySpan
                                    | (_, (_, loc), _) :: _ => loc

                        fun candidate (x, e) =
                            String.isPrefix "On" x
                            andalso serverSide (#cpsed_range st) e
                            andalso not (clientSide (#cpsed_range st) e)
                    in
                        if List.exists (fn ((CName x, _), e, _) => candidate (x, e)
                                         | _ => false) xes then
                            let
                                val (xes, st) = ListUtil.foldlMap
                                                (fn (y as (nm as (CName x, _), e, t), st) =>
                                                    if candidate (x, e) then
                                                        let
                                                            val (e, st) = newRpc (e, dummyK loc, st)
                                                        in
                                                            ((nm, (e, loc), t), st)
                                                        end
                                                    else
                                                        (y, st)
                                                  | y => y)
                                                st xes
                            in
                                (ERecord xes, st)
                            end
                        else
                            (e, st)
                    end

                  | _ => (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
                (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,
                  cpsed_range = #cpsed_range st,
                  cps_decls = [],
                  
                  exported = #exported st,
                  export_decls = [],

                  maxName = #maxName st})
            end

        val (file, _) = ListUtil.foldlMapConcat decl
                        {cpsed = IM.empty,
                         cpsed_range = IM.empty,
                         cps_decls = [],

                         exported = IS.empty,
                         export_decls = [],

                         maxName = U.File.maxName file + 1}
                        file
    in
        file
    end

end