aboutsummaryrefslogtreecommitdiff
path: root/src/interp/clam.boot
blob: f88f379e27dbae703984dcc545307d098d0e0f97 (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
-- Copyright (c) 1991-2002, The Numerical Algorithms Group Ltd.
-- All rights reserved.
-- Copyright (C) 2007-2012, Gabriel Dos Reis.
-- 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.
--
--     - Neither the name of The Numerical Algorithms Group Ltd. nor the
--       names of its contributors may 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.


import g_-timer
namespace BOOT

--% Cache Lambda Facility
-- for remembering previous values to functions
 
--to CLAM a function f, there must be an entry on $clamList as follows:
--    (functionName  --the name of the function to be CLAMed (e.g. f)
--     kind          --"hash" or number of values to be stored in
--                     circular list
--     eqEtc         --the equal function to be used
--                     (EQ, EQUAL, UEQUAL,..)
--     "shift"       --(opt) for circular lists, shift most recently
--                      used to front
--     "count")      --(opt) use reference counts (see below)
--
-- Notes:
--   Functions with "hash" as kind must give EQ, CVEC, or UEQUAL
--   Functions with some other <identifier> as kind hashed as property
--   lists with eqEtc used to compare entries
--   Functions which have 0 arguments may only be CLAMmed when kind is
--   identifier other than hash (circular/private hashtable for no args
--   makes no sense)
--
--   Functions which have more than 1 argument must never be CLAMed with EQ
--     since arguments are cached as lists
--   For circular lists, "count" will do "shift"ing; entries with lowest
--     use count are replaced
--   For cache option without "count", all entries are cleared on garbage
--     collection; For cache option with "count",
--     entries have their use count set
--     to 0 on garbage collection; those with 0 use count at garbage collection
--     are cleared

++
$clamList ==
  '((canCoerce hash UEQUAL count)                 _
    (canCoerceFrom hash UEQUAL count)             _
    (coerceConvertMmSelection hash UEQUAL count)  _
    (isLegitimateMode hash UEQUAL count)          _
    (isValidType hash UEQUAL count)               _
    (resolveTT hash UEQUAL count)                 _
    (selectMms1 hash UEQUAL count)                _
    (underDomainOf hash UEQUAL count))

++
$failed := '"failed"
 
compHash(op,argl,body) ==
--   Entries will be stored on the global hashtable in a uniform way:
--        (<argument list>, <reference count>,:<value>)
--   where the reference count is optional
  auxfn := makeWorkerName op
  cacheName := "$ConstructorCache"
  g2 := gensym()  --value computed by calling function
  putCode :=
    argl = nil =>
      ['CDDAR,['%store,['tableValue,cacheName,MKQ op],
        ['%list,['%pair,'%nil,['%pair,1,[auxfn]]]]]]
    [auxfn,:argl]
  putCode :=
     ['UNWIND_-PROTECT,['PROG1,putCode,['%store,g2,'%true]],
                  ['%when,[['%not,g2],['tableRemove!,cacheName,MKQ op]]]]
  getCode :=
    argl = nil => ['tableValue,cacheName,MKQ op]
    key :=
      argl is [g] => ['%list,['devaluate,g]]
      ['%list,:[['devaluate,x] for x in argl]]
    ['lassocShiftWithFunction,key,
      ['tableValue,cacheName,MKQ op],['%function,'domainEqualList]]
  returnFoundValue :=
    argl = nil => ['CDRwithIncrement,['CDAR,g2]]
    ['CDRwithIncrement,g2]
  codeBody := mkBind([[g2,getCode]],
                ['%when,[g2,returnFoundValue],['%otherwise,putCode]])
 
  computeFunction := [auxfn,['LAMBDA,argl,:body]]
  if $reportCompilation then
    sayBrightlyI bright '"Generated code for function:"
    pp computeFunction
  compQuietly [[op,['LAMBDA,argl,codeBody]],computeFunction]
  op
 
CDRwithIncrement x ==
  x.first := first x + 1
  rest x
 
clearClams() ==
  for [fn,kind,:.] in $clamList | kind = 'hash or integer? kind repeat
    clearClam fn
 
clearClam fn ==
  infovec := property(fn,'cacheInfo) or keyedSystemError("S2GE0003",[fn])
  eval infovec.cacheReset

reportAndClearClams() ==
  cacheStats()
  clearClams()
 
clearConstructorCaches() ==
  clearCategoryCaches()
  CLRHASH $ConstructorCache
 
clearConstructorCache(cname) ==
  (kind := getConstructorKindFromDB cname) =>
    kind = "category" => clearCategoryCache cname
    tableRemove!($ConstructorCache,cname)
 
clearConstructorAndLisplibCaches() ==
  clearClams()
  clearConstructorCaches()
 
clearCategoryCaches() ==
  for name in allConstructors() repeat
    if getConstructorKindFromDB name = "category" then
      if symbolGlobal?(cacheName:= mkCacheName name)
            then symbolValue(cacheName) := nil
      db := constructorDB name =>
        dbTemplate(db) := nil
 
clearCategoryCache catName ==
  symbolValue(mkCacheName catName) := nil
 
displayHashtable x ==
  l := sortBy(function first,[[opOf val,key] for [key,:val] in entries x])
  for [a,b] in l repeat
    sayBrightlyNT ['"%b",a,'"%d"]
    pp b
 
cacheStats() ==
  for [fn,kind,:u] in $clamList repeat
    not ('count in u) =>
      sayBrightly ["%b",fn,"%d","does not keep reference counts"]
    integer? kind => reportCircularCacheStats(fn,kind)
    kind = 'hash => reportHashCacheStats fn
    sayBrightly ["Unknown cache type for","%b",fn,"%d"]
 
reportCircularCacheStats(fn,n) ==
  infovec:= property(fn,'cacheInfo)
  circList:= eval infovec.cacheName
  numberUsed :=
    +/[1 for i in 1..n for x in circList while x isnt ['_$failed,:.]]
  sayBrightly ["%b",fn,"%d","has","%b",numberUsed,"%d","/ ",n," values cached"]
  displayCacheFrequency mkCircularCountAlist(circList,n)
  TERPRI()
 
displayCacheFrequency al ==
  al := sortBy(function first,al)
  sayBrightlyNT "    #hits/#occurrences: "
  for [a,:b] in al repeat sayBrightlyNT [a,"/",b,"  "]
  TERPRI()
 
mkCircularCountAlist(cl,len) ==
  for [x,count,:.] in cl for i in 1..len while x ~= '_$failed repeat
    u:= assoc(count,al) => u.rest := 1 + rest u
    if integer? $reportFavoritesIfNumber and count >= $reportFavoritesIfNumber then
      sayBrightlyNT ["   ",count,"  "]
      pp x
    al:= [[count,:1],:al]
  al
 
reportHashCacheStats fn ==
  infovec:= property(fn,'cacheInfo)
  ht := eval infovec.cacheName
  hashValues:= [val for [.,:val] in entries ht]
  sayBrightly [:bright fn,'"has",:bright(# hashValues),'"values cached."]
  displayCacheFrequency mkHashCountAlist hashValues
  TERPRI()
 
mkHashCountAlist vl ==
  for [count,:.] in vl repeat
    u:= assoc(count,al) => u.rest := 1 + rest u
    al:= [[count,:1],:al]
  al
 
clamStats() ==
  for [op,kind,:.] in $clamList repeat
    cacheVec:= property(op,'cacheInfo) or systemErrorHere ["clamStats",op]
    postString:=
      cacheValue:= eval cacheVec.cacheName
      kind = 'hash => [" (","%b",tableLength cacheValue,"%d","entries)"]
      empties:= numberOfEmptySlots eval cacheVec.cacheName
      empties = 0 => nil
      [" (","%b",kind-empties,"/",kind,"%d","slots used)"]
    sayBrightly [op,:postString]
 
numberOfEmptySlots cache==
  count:= (CAAR cache ='$failed => 1; 0)
  for x in tails rest cache while not sameObject?(x,cache) repeat
    if CAAR x='$failed then count:= count+1
  count
 
addToConstructorCache(op,args,value) ==
  ['haddProp,'$ConstructorCache,MKQ op,args,['CONS,1,value]]
 
haddProp(ht,op,prop,val) ==
  --presently, ht always = $ConstructorCache
  statRecordInstantiationEvent()
  if $reportInstantiations or $reportEachInstantiation then
    startTimingProcess 'debug
    recordInstantiation(op,prop,false)
    stopTimingProcess 'debug
  u:= tableValue(ht,op) =>     --hope that one exists most of the time
    assoc(prop,u) => val     --value is already there--must = val; exit now
    u.rest := [first u,:rest u]
    u.first := [prop,:val]
    $op: local := op
    listTruncate(u,20)        --save at most 20 instantiations
    val
  tableValue(ht,op) := [[prop,:val]]
  val
 
recordInstantiation(op,prop,dropIfTrue) ==
  startTimingProcess 'debug
  recordInstantiation1(op,prop,dropIfTrue)
  stopTimingProcess 'debug
 
recordInstantiation1(op,prop,dropIfTrue) ==
  if $reportEachInstantiation then
    trailer:= (dropIfTrue => '"  dropped"; '"  instantiated")
    if $insideCoerceInteractive= true then
      $instantCoerceCount:= 1+$instantCoerceCount
    if $insideCanCoerceFrom is [m1,m2] and not dropIfTrue then
      $instantCanCoerceCount:= 1+$instantCanCoerceCount
      xtra:=
        ['" for ",outputDomainConstructor m1,'"-->",outputDomainConstructor m2]
    if $insideEvalMmCondIfTrue and not dropIfTrue then
      $instantMmCondCount:= $instantMmCondCount + 1
    typeTimePrin ["CONCAT",outputDomainConstructor [op,:prop],trailer,:xtra]
  not $reportInstantiations => nil
  u:= tableValue($instantRecord,op) =>     --hope that one exists most of the time
    v := LASSOC(prop,u) =>
      dropIfTrue => v.rest := 1+rest v
      v.first := 1+first v
    u.rest := [first u,:rest u]
    val :=
      dropIfTrue => [0,:1]
      [1,:0]
    u.first := [prop,:val]
  val :=
    dropIfTrue => [0,:1]
    [1,:0]
  tableValue($instantRecord,op) := [[prop,:val]]
 
reportInstantiations() ==
  --assumed to be a hashtable with reference counts
    conList:=
      [:[[n,m,[key,:argList]] for [argList,n,:m] in item]
        for [key,:item] in entries $instantRecord]
    sayBrightly ['"# instantiated/# dropped/domain name",
      "%l",'"------------------------------------"]
    nTotal:= mTotal:= rTotal := nForms:= 0
    for [n,m,form] in sortBy(function third,conList) repeat
      nTotal:= nTotal+n; mTotal:= mTotal+m
      if n > 1 then rTotal:= rTotal + n-1
      nForms:= nForms + 1
      typeTimePrin ['CONCATB,n,m,outputDomainConstructor form]
    sayBrightly ["%b",'"Totals:","%d",nTotal,'" instantiated","%l",
      '"         ",$instantCoerceCount,'" inside coerceInteractive","%l",
       '"         ",$instantCanCoerceCount,'" inside canCoerceFrom","%l",
        '"         ",$instantMmCondCount,'" inside evalMmCond","%l",
         '"         ",rTotal,'" reinstantiated","%l",
          '"         ",mTotal,'" dropped","%l",
           '"         ",nForms,'" distinct domains instantiated/dropped"]
 
listTruncate(l,n) ==
  u:= l
  n:= n - 1
  while n ~= 0 and cons? u repeat
    n := n - 1
    u := rest u
  if cons? u then
    if cons? rest u and $reportInstantiations then
      recordInstantiation($op,CAADR u,true)
    u.rest := nil
  l
 
lassocShiftWithFunction(x,l,fn) ==
  y:= l
  while cons? y repeat
    FUNCALL(fn,x,first first y) => return (result := first y)
    y:= rest y
  result =>
    if not sameObject?(y,l) then
      y.first := first l
      l.first := result
    rest result
  nil
 
rightJustifyString(x,maxWidth) ==
  size:= entryWidth x
  size > maxWidth => keyedSystemError("S2GE0014",[x])
  [fillerSpaces(maxWidth-size,char " "),x]
 
domainEqualList(argl1,argl2) ==
  --function used to match argument lists of constructors
  while argl1 and argl2 repeat
    item1:= devaluate first argl1
    item2:= first argl2
    partsMatch:=
      item1 = item2 => true
      false
    not partsMatch => return nil
    argl1:= rest argl1; argl2 := rest argl2
  argl1 or argl2 => nil
  true
 
removeAllClams() ==
  for [fun,:.] in $clamList repeat
    sayBrightly ['"Un-clamming function",'"%b",fun,'"%d"]
    symbolValue(fun) := eval makeSymbol strconc(STRINGIMAGE fun,'";")