edu.isi.stella
Class MemoizationTable

java.lang.Object
  edu.isi.stella.Stella_Object
      edu.isi.stella.StandardObject
          edu.isi.stella.MemoizationTable

Direct Known Subclasses:

MruMemoizationTable

public class MemoizationTable
extends StandardObject

Table that maps argument values onto computed results for one individual memoization site.

Field Summary

Cons	currentTimestamp Marker value used to indicate valid memoized entries.
IntegerHashTable	hashTable The table holding the memoized values.
Surrogate	tableName The surrogate used to point to this table.
Cons	timestamps Names of timestamps that trigger invalidation of memoized entries when they get bumped.

Constructor Summary

MemoizationTable()

Method Summary

static Stella_Object	accessMemoizationTableSlotValue(MemoizationTable self, Symbol slotname, Stella_Object value, boolean setvalueP)
static Cons	lookupMemoizedValue(MemoizationTable memotable, Stella_Object arg1, Stella_Object arg2, Stella_Object arg3, Stella_Object arg4, int eqvector)
static Cons	lookupMemoizedValuen(MemoizationTable memotable, Cons args, int eqvector)
static MemoizationTable	newMemoizationTable()
Surrogate	primaryType() Returns the primary type of self.

Methods inherited from class edu.isi.stella.StandardObject

arrayTypeSpecifierP, baseTypeToTypeSpec, cantOverwriteActiveCollectionSlot, compatibleParameterTypesP, computeAnchoredTypeSpec, computeRelativeTypeSpec, conformingTypeSpecP, copyWrappedLiteral, cppNonPointerTypeP, cppReferenceTypeP, cppReferencizeType, cppTranslateAndPointerizeTypeSpec, cppTranslateAndReferencizeTypeSpec, cppTranslateTypeSpec, cppTypeWithoutInteriorPointersP, dropSlotValue, extractParameterType, extractRequiredArgumentValues, getSlot, hashCode_, idlTranslateTypeSpec, inverseSlotDemon, javaLiteralP, javaNativeLiteralWrapperNames, javaSpecialSetterName, javaTranslateArrayOfTypeSpec, javaTranslateTypeSpec, javaTranslateTypeSpecForFunction, javaTranslateTypeSpecHelper, javaYieldClassObjectArrayExpression, javaYieldClassObjectExpression, javaYieldFullyQualifiedTypeName, javaYieldTranslatedClassAndMethodNames, listifyTypeSpec, lookupClTypeFromStellaType, objectEqlP, putSlotValue, readSlotValue, runConstructorDemons, runDestructorDemons, runSlotDemons, runSlotGuardDemonsP, standardObjectP, subTypeSpecOfP, twoArgumentLeastCommonSupertype, typeSpecToBaseType, typeSpecToClass, typeToWalkedNullValueTree, validateTypeSpecifier, voidP, walkTypeSpecIsNativeTypeP, writeSlotValue, yieldTypeSpecTree

Methods inherited from class edu.isi.stella.Stella_Object

_, accessInContext, addPropertyValue, amPm, anchoredTypeSpecifierP, andOrNotTreeP, applyCoercionMethod, atomicExpressionP, bindToSurrogateP, booleanP, bootstrapIsaP, bquotify, cast, characterP, chooseSortPredicate, clConditionalizeTypeDeclarationTree, clTranslateAtomicTree, clTranslateATree, clTranslateBooleanTest, clTranslatePlainBooleanTest, clTranslateVerbatimBodySymbols, clYieldTypedExpressionTree, coerceATree, coerceEvaluatedTree, coerceMvTree, coerceOptionValue, coerceToBoolean, coerceToFloat, coerceToHashSet, coerceToModule, coerceToModuleName, coerceToString, coerceToSymbol, coerceToXmlElement, coerceValueToBoolean, coerceValueToFloat, coerceValueToString, coerceValueToType, coercibleP, collectFeatureList, collectKeyValueList, commonLispSymbolP, computeExpressionType, consify, consifyListsAndIterators, consP, consTreeMatchP, convertToLiteral, copyConsTree, cppArgumentIsStreamP, cppBinaryOperatorP, cppBlockP, cppMaybeOutputStatementWithParentheses, cppOperatorP, cppOutputAtomicExpression, cppOutputLiteral, cppOutputOneActualParameter, cppOutputStatement, cppOutputTypedEntity, cppPrognifyStatement, cppPrognP, cppStatementToList, cppStreamIsStandardOutputP, cpptrans, cppTranslateAtomicTree, cppTranslateATree, cppTranslatedArrayTypeP, csValueP, dateDivider, dateTimeDivider, day, dealWithAmPm, dealWithEra, dealWithNoonMidn, decrementReferenceCount, defaultOptionHandler, defineSystem, defmodule, deletedP, describe, describeObject, describeTersely, destructureMethodNameTree, deUglifyParseTree, either, eqlP, eqlToBooleanP, eqlToCharacterP, eqlToFloatP, eqlToIntegerP, eqlToLongIntegerP, eqlToStringP, equalConsTreesP, equalHashCode, equalP, era, estimatedEvaluationCost, evaluate, evaluateArgumentTree, evaluateAtomicTree, evaluateCommand, expandBquoteTree, filterModuleP, floatP, free, get, getObject, getProperty, hashlist, hashMemoizedArguments, helpBquotify, helpClTranslateATree, helpCoerceATree, helpLptrans, helpPrintOutline, helpTransformBooleanProceduralExpression, helpWalkATree, homeModule, hour, idlOutputAtomicExpression, idlOutputLiteral, idlOutputStatement, idlTranslateAtomicTree, idlTranslateATree, illegalTreeP, implodePathname, incrementallyTranslate, incrementReferenceCount, inlineUnwrapBoolean, inlineWrapBoolean, inModule, integerP, isaP, javaBinaryOperatorP, javaBlockP, javaEndOfLineTokenP, javaHelpOutputPrintStream, javaMaybeOutputStatementWithParentheses, javaOperatorP, javaOutputLiteral, javaOutputStatement, javaPrognP, javaStreamIsStandardOutputP, javaSymbolCaseP, javaTranslateAtomicTree, javaTranslateATree, javaTranslateWithNativeWrapper, jptrans, keywordP, legalTokenizerFromStateP, legalTokenizerStateP, legalTokenizerToStateP, literalEqlP, logLevelLE, longIntegerP, lptrans, makeEvaluatableBquoteTree, makeFileNameFromRelativePath, makeMemoizedValueEntry, makeMemoizedValueEntryn, matchConsTree, methodSlotP, minute, month, nameToString, nilP, noonMidn, numberWrapperToFloat, objectEqualP, objectHashCode, one, oneI, onlyIf, parametricTypeSpecifierP, parseArrayDimensionsSpec, parseOptions, parseTokenizerCharacterSpec, parseTokenizerStateModifiers, permanentCopy, permanentify, permanentifyForm, po, prettyPrintLiteral, primaryClass, printObject, printOutline, printStellaCode, printStellaDefinition, printUndefinedSuperClasses, proceduralExpressionP, ptrans, publicSlots, registerRecycledItem, runOptionHandlerP, safeEqualHashCode, safeHashCode, safePrimaryType, safeYieldTypeSpecifier, searchConsTreeP, searchConsTreeWithFilterP, searchForObject, secondp, setProperty, sideEffectFreeExpressionP, simplifyBquoteTree, specialp, stella_Increment, stellaClassP, stellaCollectionP, stellaNeedToCompileP, stellaNeedToTranslateP, stellaObjectP, stellify, storageSlotP, stringifyInModule, stringP, substituteConsTree, substituteOnce, surrogateP, surrogatify, sweep, symbolCaseP, symbolP, sysTree, targetLanguageType, taxonomyIsaP, timeDivider, timeMultiply, tokenizerIncludeSpecP, tokenizerToStateAlias, tokenizerToStateName, toString, traceIf, traceKeywordP, transientifyForm, transientObjectP, transientSymbolP, translateWalkedTree, treeSize, treeToTrees, trueOptionP, tryToEvaluate, typeP, typify, unmake, unregisterRecycledItem, updateInContext, valuesTreeP, variableExpressionP, verbatimStringP, verbatimTreeP, vetOptions, vrletExpressionP, walkAtomicTree, walkATree, walkCollectionTree, walkDontCallMeTree, walkedExpressionExpression, walkedExpressionType, walkExpressionTree, walkMvExpressionTree, walkMvTree, walkStatement, walkTopLevelExpression, walkWithoutTypeTree, warnAboutUnknownSourceType, weekday, withinContext, withinModule, withinWorld, withStellaTokenizer, withSystemDefinition, withTokenizer, wrapperP, wrapWhereTest, xmlAttributeP, xmlBaseAttributeP, xmlCdataFormP, xmlCdataP, xmlDeclarationFormP, xmlDeclarationP, xmlDoctypeFormP, xmlElementFormP, xmlElementP, xmlGlobalAttributeP, xmlLocalAttributeP, xmlnsAttributeP, xmlProcessingInstructionFormP, xmlProcessingInstructionP, xmlTagCase, year, yieldCondTest, yieldCondTestOrTests, yieldHardcodedCaseSymbolIdOrIds, yieldInCursorClausesForArgumentList, yieldInCursorClausesForGeneralCollection, yieldInCursorClausesForVector, yieldTypeSpecifier, zone, zoneMinute

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

hashTable

public IntegerHashTable hashTable

The table holding the memoized values. We use an integer table, since we explicitly compute a hash code by combining hash codes of argument values.

tableName

public Surrogate tableName

The surrogate used to point to this table. Used at the memoization site for quick memo table lookup.

currentTimestamp

public Cons currentTimestamp

Marker value used to indicate valid memoized entries. This marker changes everytime one of the timestamps gets bumped.

timestamps

public Cons timestamps

Names of timestamps that trigger invalidation of memoized entries when they get bumped.

Constructor Detail

MemoizationTable

public MemoizationTable()

Method Detail

newMemoizationTable

public static MemoizationTable newMemoizationTable()

lookupMemoizedValuen

public static Cons lookupMemoizedValuen(MemoizationTable memotable,
                                        Cons args,
                                        int eqvector)

lookupMemoizedValue

public static Cons lookupMemoizedValue(MemoizationTable memotable,
                                       Stella_Object arg1,
                                       Stella_Object arg2,
                                       Stella_Object arg3,
                                       Stella_Object arg4,
                                       int eqvector)

accessMemoizationTableSlotValue

public static Stella_Object accessMemoizationTableSlotValue(MemoizationTable self,
                                                            Symbol slotname,
                                                            Stella_Object value,
                                                            boolean setvalueP)

primaryType

public Surrogate primaryType()

Description copied from class: Stella_Object

Returns the primary type of self. Gets defined automatically for every non-abstract subclass of OBJECT.

Overrides:

primaryType in class Stella_Object

Returns:

Surrogate