PyrObject.cpp

/*
	SuperCollider real time audio synthesis system
    Copyright (c) 2002 James McCartney. All rights reserved.
	http://www.audiosynth.com

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
*/

#include <atomic>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <limits.h>
#include "GC.h"
#include "PyrMessage.h"
#include "PyrInterpreter.h"
#include "PyrSymbolTable.h"
#include "PyrObjectProto.h"
#include "PyrKernelProto.h"
#include "PyrLexer.h"
#include "InitAlloc.h"
#include "Hash.h"
#include "SC_Constants.h"
#include "SC_Alloca.h"
#include "SC_Lock.h"

#include <set>
#include <limits>

PyrClass *gClassList = NULL;
int gNumSelectors = 0;
int gNumClasses = 0;
int gNumClassVars = 0;
int gFormatElemSize[NUMOBJFORMATS];
int gFormatElemCapc[NUMOBJFORMATS];
int gFormatElemTag[NUMOBJFORMATS];
PyrMethod *gNullMethod; // used to fill row table
PyrClass* gTagClassTable[16];

PyrClass *class_object;
PyrClass *class_dict;
PyrClass *class_array;
PyrClass *class_list, *class_method, *class_fundef, *class_frame, *class_class;
PyrClass *class_symbol, *class_nil;
PyrClass *class_boolean, *class_true, *class_false;
PyrClass *class_int, *class_char, *class_float, *class_complex;
PyrClass *class_rawptr;
PyrClass *class_string;
PyrClass *class_magnitude, *class_number, *class_collection, *class_ordered_collection;
PyrClass *class_arrayed_collection;
PyrClass *class_sequenceable_collection;
PyrClass *class_simple_number;
PyrClass *class_rawarray;
PyrClass *class_signal;
PyrClass *class_wavetable;
PyrClass *class_floatarray;
PyrClass *class_int8array;
PyrClass *class_int16array;
PyrClass *class_int32array;
PyrClass *class_symbolarray;
PyrClass *class_doublearray;
PyrClass *class_func, *class_absfunc;
PyrClass *class_stream;
PyrClass *class_process;
PyrClass *class_interpreter;
PyrClass *class_thread;
PyrClass *class_routine;
PyrClass *class_finalizer;
PyrClass *class_server_shm_interface;

PyrSymbol *s_none;
PyrSymbol *s_object;
PyrSymbol *s_bag;
PyrSymbol *s_set;
PyrSymbol *s_identityset;
PyrSymbol *s_dictionary;
PyrSymbol *s_identitydictionary;
PyrSymbol *s_linkedlist;
PyrSymbol *s_sortedlist;
PyrSymbol *s_array;
PyrSymbol *s_list, *s_method, *s_fundef, *s_frame, *s_class;
PyrSymbol *s_symbol, *s_nil;
PyrSymbol *s_boolean, *s_true, *s_false;
PyrSymbol *s_int, *s_char, *s_color, *s_float, *s_complex;
PyrSymbol *s_rawptr, *s_objptr;
PyrSymbol *s_string;
PyrSymbol *s_magnitude, *s_number, *s_collection, *s_ordered_collection;
PyrSymbol *s_arrayed_collection;
PyrSymbol *s_sequenceable_collection;
PyrSymbol *s_simple_number;
PyrSymbol *s_signal;
PyrSymbol *s_wavetable;

PyrSymbol *s_rawarray;
PyrSymbol *s_int8array;
PyrSymbol *s_int16array;
PyrSymbol *s_int32array;
PyrSymbol *s_symbolarray;
PyrSymbol *s_doublearray;
PyrSymbol *s_floatarray;
PyrSymbol *s_point;
PyrSymbol *s_rect;
PyrSymbol *s_func, *s_absfunc;
PyrSymbol *s_stream;
PyrSymbol *s_process;
PyrSymbol *s_main;
PyrSymbol *s_thread;
PyrSymbol *s_routine;
PyrSymbol *s_task;
PyrSymbol *s_prstart;
PyrSymbol *s_interpreter;
PyrSymbol *s_finalizer;
PyrSymbol *s_awake;
PyrSymbol *s_appclock;
PyrSymbol *s_systemclock;
PyrSymbol *s_server_shm_interface;
PyrSymbol *s_interpretCmdLine, *s_interpretPrintCmdLine;

PyrSymbol *s_nocomprendo;
PyrSymbol *s_curProcess, *s_curMethod, *s_curBlock, *s_curClosure, *s_curThread;
//PyrSymbol *s_sampleRate;
//PyrSymbol *s_audioClock, *s_logicalClock;
PyrSymbol *s_run, *s_stop, *s_tick;
PyrSymbol *s_startup;
PyrSymbol *s_docmdline;
PyrSymbol *s_audio;
PyrSymbol *s_control;
PyrSymbol *s_scalar;
PyrSymbol *s_next;
PyrSymbol *s_env;
PyrSymbol *s_ugen, *s_outputproxy;
PyrSymbol *s_new, *s_ref, *s_value, *s_at, *s_put;
PyrSymbol *s_performList, *s_superPerformList;
PyrSymbol *s_series, *s_copyseries, *s_putseries;
PyrSymbol *s_envirGet, *s_envirPut;
PyrSymbol *s_synth, *s_spawn, *s_environment, *s_event;
PyrSymbol *s_hardwaresetup, *s_shutdown;
PyrSymbol *s_linear, *s_exponential, *s_gate;
PyrSymbol *s_super, *s_this;
PyrSlot o_nil, o_true, o_false, o_end;
PyrSlot o_pi, o_twopi;
PyrSlot o_fhalf, o_fnegone, o_fzero, o_fone, o_ftwo, o_inf;
PyrSlot o_negtwo, o_negone, o_zero, o_one, o_two;
PyrSlot o_nullframe, o_none;
PyrSlot o_emptyarray, o_onenilarray, o_argnamethis;


void initSymbols()
{
	s_new = getsym("new");
	s_ref = getsym("Ref");
	s_none = getsym("none");
	s_object = getsym("Object");
	s_this = getsym("this");
	s_super = getsym("super");

	s_dictionary = getsym("Dictionary");
	s_bag = getsym("Bag");
	s_set = getsym("Set");
	s_identityset = getsym("IdentitySet");
	s_identitydictionary = getsym("IdentityDictionary");
	s_linkedlist = getsym("LinkedList");
	s_sortedlist = getsym("SortedList");
	s_array = getsym("Array");
	s_list = getsym("List");
	s_method = getsym("Method");
	s_fundef = getsym("FunctionDef");
	s_frame = getsym("Frame");
	s_class = getsym("Class");
	s_symbol = getsym("Symbol");
	s_nil = getsym("Nil");
	s_true = getsym("True");
	s_false = getsym("False");
	s_int = getsym("Integer");
	s_float = getsym("Float");
	s_char = getsym("Char");
	s_color = getsym("Color");
	s_rawptr = getsym("RawPointer");
	s_objptr = getsym("ObjectPointer");
	s_string = getsym("String");
	s_magnitude = getsym("Magnitude");
	s_number = getsym("Number");
	s_simple_number = getsym("SimpleNumber");
	s_collection = getsym("Collection");
	//s_ordered_collection = getsym("OrderedCollection");
	s_arrayed_collection = getsym("ArrayedCollection");
	s_sequenceable_collection = getsym("SequenceableCollection");
	s_boolean = getsym("Boolean");
	s_signal = getsym("Signal");
	s_wavetable = getsym("Wavetable");
	//s_signalnode = getsym("SignalNode");
	s_rawarray = getsym("RawArray");
	s_int8array = getsym("Int8Array");
	s_int16array = getsym("Int16Array");
	s_int32array = getsym("Int32Array");
	s_symbolarray = getsym("SymbolArray");
	s_floatarray = getsym("FloatArray");
	s_doublearray = getsym("DoubleArray");
	s_complex = getsym("Complex");
	s_point = getsym("Point");
	s_rect = getsym("Rect");
	s_absfunc = getsym("AbstractFunction");
	s_func = getsym("Function");
	s_stream = getsym("Stream");
	s_process = getsym("Process");
	s_main = getsym("Main");
	s_thread = getsym("Thread");
	s_routine = getsym("Routine");
	s_task = getsym("Task");
	s_prstart = getsym("prStart");
	s_interpreter = getsym("Interpreter");
	s_finalizer = getsym("Finalizer");
	s_awake = getsym("awake");
	s_appclock = getsym("AppClock");
	s_systemclock = getsym("SystemClock");
	s_server_shm_interface = getsym("ServerShmInterface");

	s_linear = getsym("linear");
	s_exponential = getsym("exponential");
	s_gate = getsym("gate");

	//s_dsp = getsym("DSP");
	//s_dspsettings = getsym("DSPSettings");
	s_synth = getsym("Synth");
	s_spawn = getsym("BasicSpawn");
	s_environment = getsym("Environment");
	s_event = getsym("Event");
	s_hardwaresetup = getsym("hardwareSetup");
	s_shutdown = getsym("shutdown");

	s_interpretCmdLine = getsym("interpretCmdLine");
	s_interpretPrintCmdLine = getsym("interpretPrintCmdLine");


	s_nocomprendo = getsym("doesNotUnderstand");

	s_curProcess = getsym("thisProcess");
	s_curThread = getsym("thisThread");
	s_curMethod = getsym("thisMethod");
	s_curBlock = getsym("thisFunctionDef");
	s_curClosure = getsym("thisFunction");
	//s_sampleRate = getsym("gSR");
	//s_logicalClock = getsym("gTime");
	//s_audioClock = getsym("gAudioTime");
	s_audio = getsym("audio");
	s_control = getsym("control");
	s_scalar = getsym("scalar");
	s_run = getsym("run");
	s_stop = getsym("stop");
	s_tick = getsym("tick");
	s_startup = getsym("startup");
	s_docmdline = getsym("doCmdLine");
	s_next = getsym("next");
	s_value = getsym("value");
	s_performList = getsym("performList");
	s_superPerformList = getsym("superPerformList");
	s_at = getsym("at");
	s_put = getsym("put");

	s_series = getsym("prSimpleNumberSeries");
	s_copyseries = getsym("copySeries");
	s_putseries = getsym("putSeries");

	s_ugen = getsym("UGen");
	s_outputproxy = getsym("OutputProxy");
	s_env = getsym("Env");

	s_envirGet = getsym("envirGet");
	s_envirPut = getsym("envirPut");

	SetNil(&o_nil);
	SetFalse(&o_false);
	SetTrue(&o_true);

	SetFloat(&o_pi, pi);
	SetFloat(&o_twopi, twopi);
	SetFloat(&o_fhalf, .5);
	SetFloat(&o_fnegone, -1.);
	SetFloat(&o_fzero, 0.);
	SetFloat(&o_fone, 1.);
	SetFloat(&o_ftwo, 2.);
	SetInt(&o_negtwo, -2);
	SetInt(&o_negone, -1);
	SetInt(&o_zero, 0);
	SetInt(&o_one, 1);
	SetInt(&o_two, 2);
	SetSymbol(&o_none, s_none);
	SetFloat(&o_inf, std::numeric_limits<double>::infinity());

	slotCopy(&gSpecialValues[svNil], &o_nil);
	slotCopy(&gSpecialValues[svFalse], &o_false);
	slotCopy(&gSpecialValues[svTrue], &o_true);
	slotCopy(&gSpecialValues[svNegOne], &o_negone);
	slotCopy(&gSpecialValues[svZero], &o_zero);
	slotCopy(&gSpecialValues[svOne], &o_one);
	slotCopy(&gSpecialValues[svTwo], &o_two);
	slotCopy(&gSpecialValues[svFHalf], &o_fhalf);
	slotCopy(&gSpecialValues[svFNegOne], &o_fnegone);
	slotCopy(&gSpecialValues[svFZero], &o_fzero);
	slotCopy(&gSpecialValues[svFOne], &o_fone);
	slotCopy(&gSpecialValues[svFTwo], &o_ftwo);
	slotCopy(&gSpecialValues[svInf], &o_inf);

	gFormatElemSize[obj_notindexed] = sizeof(PyrSlot);
	gFormatElemSize[obj_slot  ] = sizeof(PyrSlot);
	gFormatElemSize[obj_double] = sizeof(double);
	gFormatElemSize[obj_float ] = sizeof(float);
	gFormatElemSize[obj_int32  ] = sizeof(int32);
	gFormatElemSize[obj_int16 ] = sizeof(int16);
	gFormatElemSize[obj_int8  ] = sizeof(int8);
	gFormatElemSize[obj_char  ] = sizeof(char);
	gFormatElemSize[obj_symbol  ] = sizeof(PyrSymbol*);

	gFormatElemCapc[obj_notindexed] = sizeof(PyrSlot) / sizeof(PyrSlot);
	gFormatElemCapc[obj_slot  ] = sizeof(PyrSlot) / sizeof(PyrSlot);
	gFormatElemCapc[obj_double] = sizeof(PyrSlot) / sizeof(double);
	gFormatElemCapc[obj_float ] = sizeof(PyrSlot) / sizeof(float);
	gFormatElemCapc[obj_int32  ] = sizeof(PyrSlot) / sizeof(int32);
	gFormatElemCapc[obj_int16 ] = sizeof(PyrSlot) / sizeof(int16);
	gFormatElemCapc[obj_int8  ] = sizeof(PyrSlot) / sizeof(int8);
	gFormatElemCapc[obj_char  ] = sizeof(PyrSlot) / sizeof(char);
	gFormatElemCapc[obj_symbol] = sizeof(PyrSlot) / sizeof(PyrSymbol*);

	gFormatElemTag[obj_notindexed] = -1;
	gFormatElemTag[obj_slot  ] = -1;
	gFormatElemTag[obj_double] = 0;
	gFormatElemTag[obj_float ] = 0;
	gFormatElemTag[obj_int32  ] = tagInt;
	gFormatElemTag[obj_int16 ] = tagInt;
	gFormatElemTag[obj_int8  ] = tagInt;
	gFormatElemTag[obj_char  ] = tagChar;
	gFormatElemTag[obj_symbol] = tagSym;
}

const char *slotSymString(PyrSlot* slot)
{
	switch (GetTag(slot)) {
		case tagObj : return slotRawSymbol(&slotRawObject(slot)->classptr->name)->name;
		case tagInt : return "Integer";
		case tagChar : return "Char";
		case tagSym : return slotRawSymbol(slot)->name;
		case tagNil : return "Nil";
		case tagFalse : return "False";
		case tagTrue : return "True";
		default : return "<float>";
	}
}

PyrClass* newClassObj(PyrClass *classObjSuperClass,
	PyrSymbol* className, PyrSymbol* superClassName,
	int numInstVars, int numClassVars, int numConsts, int numInstMethods,
	int instFormat, int instFlags)
{
	PyrClass* classobj, *superclassobj;
	PyrObject* array;
	PyrSymbolArray *symarray;
	int classFlags;

	/*{
		int c;
		c = className->name[0];
		if (!(c >= 'A' && c <= 'Z')) Debugger();
	}*/
	// pyrmalloc:
	// lifetime: kill upon recompiling library
	classobj = (PyrClass*)pyr_pool_runtime->Alloc(sizeof(PyrClass));
	MEMFAIL(classobj);
	classobj->size = (sizeof(PyrClass) - sizeof(PyrObjectHdr))/sizeof(PyrSlot);
	classobj->prev = classobj->next = NULL;
	classobj->obj_flags = obj_immutable ;
	classobj->obj_format = obj_notindexed ;
	classobj->gc_color = obj_permanent ;
	classobj->obj_sizeclass = LOG2CEIL(classobj->size);
	classobj->classptr = classObjSuperClass;


	// append to the list of classes
	if (gClassList) SetObject(&classobj->nextclass, gClassList);
	else SetNil(&classobj->nextclass);

	gClassList = classobj;

	className->u.classobj = classobj;
	//postfl("> '%s' %d %d\n", className->name, className, classobj);

	SetSymbol(&classobj->name, className);
	if (superClassName) {
		SetSymbol(&classobj->superclass, superClassName);
		superclassobj = superClassName->u.classobj;
	} else {
		SetSymbol(&classobj->superclass, s_none);
		superclassobj = NULL;
	}

	SetInt(&classobj->subclasses, 0); // to be filled with subclasses later
	// in the meantime it is used as a tally of subclasses so that its allocation
	// size can be known

	if (numInstMethods) {
		array = newPyrArray(NULL, numInstMethods, obj_permanent | obj_immutable, false);
		SetObject(&classobj->methods, array);
	} else {
		SetNil(&classobj->methods);
	}

	if (numInstVars) {
		symarray = newPyrSymbolArray(NULL, numInstVars, obj_permanent | obj_immutable, false);
		SetObject(&classobj->instVarNames, symarray);

		array = newPyrArray(NULL, numInstVars, obj_permanent | obj_immutable, false);
		SetObject(&classobj->iprototype, array);
		nilSlots(array->slots, numInstVars);
	} else {
		SetNil(&classobj->instVarNames);
		SetNil(&classobj->iprototype);
	}

	if (numClassVars) {
		symarray = newPyrSymbolArray(NULL, numClassVars, obj_permanent | obj_immutable, false);
		SetObject(&classobj->classVarNames, symarray);

		array = newPyrArray(NULL, numClassVars, obj_permanent | obj_immutable, false);
		SetObject(&classobj->cprototype, array);
		nilSlots(array->slots, numClassVars);
	} else {
		SetNil(&classobj->classVarNames);
		SetNil(&classobj->cprototype);
	}

	if (numConsts) {
		symarray = newPyrSymbolArray(NULL, numConsts, obj_permanent | obj_immutable, false);
		SetObject(&classobj->constNames, symarray);

		array = newPyrArray(NULL, numConsts, obj_permanent | obj_immutable, false);
		SetObject(&classobj->constValues, array);
		nilSlots(array->slots, numConsts);
	} else {
		SetNil(&classobj->constNames);
		SetNil(&classobj->constValues);
	}

	classFlags = 0;
	if (instFormat != obj_notindexed) {
		classFlags |= classHasIndexableInstances;
	}

	SetInt(&classobj->instanceFormat, instFormat);
	SetInt(&classobj->instanceFlags, instFlags);
	SetInt(&classobj->classIndex, -1);
	SetInt(&classobj->classFlags, classFlags);
	SetInt(&classobj->maxSubclassIndex, 0);
	SetNil(&classobj->filenameSym);
	SetInt(&classobj->charPos, 0);
	SetInt(&classobj->classVarIndex, gNumClassVars);
	//if (numClassVars) post("%16s %4d %4d\n", className->name, gNumClassVars, numClassVars);
	gNumClassVars += numClassVars;
	return classobj;
}

void reallocClassObj(PyrClass* classobj,
	int numInstVars, int numClassVars, int numConsts, int numMethods,
	int instFormat, int instFlags)
{
	PyrObject* array;
	PyrSymbolArray *symarray;
	PyrClass *superclassobj;

	freePyrSlot(&classobj->methods);
	freePyrSlot(&classobj->instVarNames);
	freePyrSlot(&classobj->classVarNames);
	freePyrSlot(&classobj->iprototype);
	freePyrSlot(&classobj->cprototype);

	freePyrSlot(&classobj->constNames);
	freePyrSlot(&classobj->constValues);

	if (numMethods) {
		array = newPyrArray(NULL, numMethods, obj_permanent | obj_immutable, false);
		SetObject(&classobj->methods, array);
	} else {
		SetNil(&classobj->methods);
	}

	if (numInstVars) {
		//post("reallocClassObj %s numInstVars %d\n", slotRawSymbol(&classobj->name)->name, numInstVars);
		symarray = newPyrSymbolArray(NULL, numInstVars, obj_permanent | obj_immutable, false);
		SetObject(&classobj->instVarNames, symarray);

		array = newPyrArray(NULL, numInstVars, obj_permanent | obj_immutable, false);
		SetObject(&classobj->iprototype, array);
		nilSlots(array->slots, numInstVars);
	} else {
		SetNil(&classobj->instVarNames);
		SetNil(&classobj->iprototype);
	}

	if (numClassVars) {
		//post("reallocClassObj %s numClassVars %d\n", slotRawSymbol(&classobj->name)->name, numClassVars);
		symarray = newPyrSymbolArray(NULL, numClassVars, obj_permanent | obj_immutable, false);
		SetObject(&classobj->classVarNames, symarray);
		nilSlots(array->slots, numClassVars);

		array = newPyrArray(NULL, numClassVars, obj_permanent | obj_immutable, false);
		SetObject(&classobj->cprototype, array);
		nilSlots(array->slots, numClassVars);
	} else {
		SetNil(&classobj->classVarNames);
		SetNil(&classobj->cprototype);
	}

	if (numConsts) {
		//post("reallocClassObj %s numConsts %d\n", slotRawSymbol(&classobj->name)->name, numConsts);
		symarray = newPyrSymbolArray(NULL, numConsts, obj_permanent | obj_immutable, false);
		SetObject(&classobj->constNames, symarray);

		array = newPyrArray(NULL, numConsts, obj_permanent | obj_immutable, false);
		SetObject(&classobj->constValues, array);
		nilSlots(array->slots, numConsts);
	} else {
		SetNil(&classobj->constNames);
		SetNil(&classobj->constValues);
	}

	superclassobj = slotRawSymbol(&classobj->superclass)->u.classobj;

	SetInt(&classobj->instanceFormat, instFormat);
	SetInt(&classobj->instanceFlags, instFlags);
	SetInt(&classobj->classIndex, -1);
}

void fixClassArrays(PyrClass *classobj);
void fixClassArrays(PyrClass *classobj)
{
	if (IsObj(&classobj->methods)) slotRawObject(&classobj->methods)->classptr = class_array;
	if (IsObj(&classobj->instVarNames)) slotRawObject(&classobj->instVarNames)->classptr = class_symbolarray;
	if (IsObj(&classobj->classVarNames)) slotRawObject(&classobj->classVarNames)->classptr = class_symbolarray;
	if (IsObj(&classobj->iprototype)) slotRawObject(&classobj->iprototype)->classptr = class_array;
	if (IsObj(&classobj->cprototype)) slotRawObject(&classobj->cprototype)->classptr = class_array;
}

int numInstVars(PyrClass* classobj)
{
	int res;
	if (IsNil(&classobj->instVarNames))
		res = 0;
	else
		res = slotRawObject(&classobj->instVarNames)->size;
	return res;
}

int numClassVars(PyrClass* classobj)
{
	int res;
	if (IsNil(&classobj->classVarNames)) res = 0;
	else res = slotRawObject(&classobj->classVarNames)->size;
	return res;
}


void objAddIndexedSlotGrow(PyrSlot *arraySlot, PyrSlot *addSlot);
void objAddIndexedSlotGrow(PyrSlot *arraySlot, PyrSlot *addSlot)
{
	PyrObject *obj;
	if (IsNil(arraySlot)) {
		PyrObject *newobj = (PyrObject*)newPyrArray(NULL, 1, obj_permanent | obj_immutable, false);
		SetObject(arraySlot, newobj);
		obj = newobj;
	} else {
		obj = slotRawObject(arraySlot);
		if (obj->size >= ARRAYMAXINDEXSIZE(obj)) {
			//post("objAddIndexedSlotGrow\n");
			PyrObject *newobj = (PyrObject*)newPyrArray(NULL, obj->size * 2, obj_permanent | obj_immutable, false);
			memcpy(newobj->slots, obj->slots, obj->size * sizeof(PyrSlot));
			newobj->size = obj->size;
			SetObject(arraySlot, newobj);
			pyr_pool_runtime->Free((void*)obj);
			obj = newobj;
		}
	}
	slotCopy(&obj->slots[obj->size++], addSlot);
}

void addMethod(PyrClass *classobj, PyrMethod *method)
{
	PyrSlot slot;
	SetObject(&slot, method);
	objAddIndexedSlotGrow(&classobj->methods, &slot);
}



PyrMethod* classFindDirectMethod(PyrClass* classobj, PyrSymbol *name)
{
	PyrMethod *method;
	PyrSlot *methods;
	int i, numMethods;
	if (IsNil(&classobj->methods)) return NULL;
	methods = slotRawObject(&classobj->methods)->slots;
	numMethods = slotRawObject(&classobj->methods)->size;
	for (i=0; i<numMethods; ++i) {
		method = slotRawMethod(&methods[i]);
		if (slotRawSymbol(&method->name) == name) break;
	}
	if (i>=numMethods) method = NULL;
	return method;
}

int numSuperInstVars(PyrClass *superclassobj)
{
	int superinstvars = 0;
	if (superclassobj) {
		if (IsObj(&superclassobj->iprototype)) {
			superinstvars = slotRawObject(&superclassobj->iprototype)->size;
		}
	}
	return superinstvars;
}

bool classFindInstVar(PyrClass* classobj, PyrSymbol *name, int *index)
{
	PyrSymbolArray *ivnames;
	PyrSymbol *ivname;
	int i;
	if (NotNil(&classobj->instVarNames)) {
		ivnames = slotRawSymbolArray(&classobj->instVarNames);
		if (ivnames) {
			for (i=0; i<ivnames->size; ++i) {
				ivname = ivnames->symbols[i];
				if (ivname == name) {
					//numsupervars = numSuperInstVars(slotRawSymbol(&classobj->superclass)->u.classobj);
					//*index = numsupervars + i;
					*index = i;
					return true;
				}
			}
		}
	}
	return false;
}

int instVarOffset(const char *classname, const char *instvarname)
{
	PyrSymbol *instvarsymbol, *classsymbol;
	PyrClass* classobj;
	int index;
	char c;

	classsymbol = getsym(classname);
	instvarsymbol = getsym(instvarname);

	c = classname[0];
	if (!(c >= 'A' && c <= 'Z')) return -1;

	classobj = classsymbol->u.classobj;
	if (!classobj) return -1;
	if (!classFindInstVar(classobj, instvarsymbol, &index)) return -1;
	return index;
}

int classVarOffset(const char *classname, const char *classvarname, PyrClass** classobj)
{
	PyrSymbol *classvarsymbol, *classsymbol;
	int index;
	char c;

	classsymbol = getsym(classname);
	classvarsymbol = getsym(classvarname);

	c = classname[0];
	if (!(c >= 'A' && c <= 'Z')) return -1;

	*classobj = classsymbol->u.classobj;
	if (!*classobj) return -1;
	if (!classFindClassVar(classobj, classvarsymbol, &index)) return -1;
	return index;
}

bool classFindClassVar(PyrClass** classobj, PyrSymbol *name, int *index)
{
	PyrSymbolArray *cvnames;
	PyrSymbol *cvname;
	int i, j;
	char *classname;
	PyrClass* localclassobj = *classobj;
	// if this is a Metaclass then we need to search its normal Class for
	// the class vars
	classname = slotRawSymbol(&localclassobj->name)->name;
	if (strncmp(classname, "Meta_", 5) == 0) {
		localclassobj = getsym(classname+5)->u.classobj;
	}
	for (j=0; localclassobj; ++j) {
		if (NotNil(&localclassobj->classVarNames)) {
			cvnames = slotRawSymbolArray(&localclassobj->classVarNames);
			if (cvnames) {
				for (i=0; i<cvnames->size; ++i) {
					cvname = cvnames->symbols[i];
					if (cvname == name) {
						*classobj = localclassobj;
						*index = i;
						return true;
					}
				}
			}
		}
		if (IsSym(&localclassobj->superclass)) {
			localclassobj = slotRawSymbol(&localclassobj->superclass)->u.classobj;
		} else {
			localclassobj = NULL;
		}
	}
	return false;
}

bool classFindConst(PyrClass** classobj, PyrSymbol *name, int *index)
{
	PyrSymbolArray *knames;
	PyrSymbol *kname;
	int i, j;
	char *classname;
	PyrClass* localclassobj = *classobj;
	// if this is a Metaclass then we need to search its normal Class for
	// the class vars
	classname = slotRawSymbol(&localclassobj->name)->name;
	if (strncmp(classname, "Meta_", 5) == 0) {
		localclassobj = getsym(classname+5)->u.classobj;
	}
	for (j=0; localclassobj; ++j) {
		if (NotNil(&localclassobj->constNames)) {
			knames = slotRawSymbolArray(&localclassobj->constNames);
			if (knames) {
				for (i=0; i<knames->size; ++i) {
					kname = knames->symbols[i];
					if (kname == name) {
						*classobj = localclassobj;
						*index = i;
						return true;
					}
				}
			}
		}
		if (IsSym(&localclassobj->superclass)) {
			localclassobj = slotRawSymbol(&localclassobj->superclass)->u.classobj;
		} else {
			localclassobj = NULL;
		}
	}
	return false;
}

struct compareByName
{
	bool operator()(PyrClass * lhs, PyrClass * rhs) const
	{
		return strcmp(slotRawSymbol(&lhs->name)->name, slotRawSymbol(&rhs->name)->name) < 0;
	}
};


template <class T>
class pyr_pool_compile_allocator
{
public:
	typedef std::size_t size_type;
	typedef std::ptrdiff_t difference_type;
	typedef T*        pointer;
	typedef const T*  const_pointer;
	typedef T&        reference;
	typedef const T&  const_reference;
	typedef T         value_type;

	template <class U> struct rebind
	{
		typedef pyr_pool_compile_allocator<U> other;
	};

	pyr_pool_compile_allocator(void)
	{}

	template <class U>
	pyr_pool_compile_allocator(pyr_pool_compile_allocator<U> const &)
	{}

	pointer address(reference x) const
	{
		return &x;
	}

	const_pointer address(const_reference x) const
	{
		return &x;
	}

	pointer allocate(size_type n, const void*  hint = 0)
	{
		return (pointer)pyr_pool_compile->Alloc(n*sizeof(T));
	}

	void deallocate(pointer p, size_type n)
	{
		pyr_pool_compile->Free(p);
	}

	void construct(pointer p, const T& val)
	{
		::new(p) T(val);
	}

	void destroy(pointer p)
	{
		p->~T();
	}
};


/* sort list of classes:
 * we fill a binary search tree
 *
 */
static PyrClass * sortClasses(PyrClass * aClassList)
{
	typedef std::set<PyrClass*, compareByName, pyr_pool_compile_allocator<PyrClass*> > classSetType;
	classSetType classSet;

	PyrClass * insertHead = aClassList;
	do {
		assert(classSet.find(insertHead) == classSet.end());
		classSet.insert(insertHead);
		insertHead = slotRawClass(&insertHead->nextclass);
	} while (insertHead);

	classSetType::iterator it = classSet.begin();
	PyrClass * sortedClasses = *it;
	++it;

	PyrClass * lastClass = sortedClasses;
	for (; it != classSet.end(); ++it) {
		PyrClass * current = *it;
		SetObject(&lastClass->nextclass, (PyrObject*)current);
		lastClass = current;
	}
	SetNil(&lastClass->nextclass);
	return sortedClasses;
}

#include <boost/threadpool.hpp>

static int cpuCount = thread::hardware_concurrency();
static int helperThreadCount = cpuCount - 1;
static boost::threadpool::fifo_pool compileThreadPool;

void buildClassTree()
{
	// the first time we use the pool
	compileThreadPool.size_controller().resize(helperThreadCount);

	// after all classes are compiled this function builds the tree and
	// indexes the classes

	// count subclasses
	//postfl("count subclasses\n");
	PyrClass *classobj = gClassList;
	while (classobj) {
		PyrClass * superclassobj = slotRawSymbol(&classobj->superclass)->u.classobj;
		if (superclassobj) {
			//postfl("     superclassobj %s\n", slotRawSymbol(&superclassobj->name)->name);
			SetRaw(&superclassobj->subclasses, slotRawInt(&superclassobj->subclasses) + 1);
		}
		classobj = slotRawClass(&classobj->nextclass);
	}
	// allocate subclass arrays
	//postfl("allocate subclass arrays\n");
	classobj = gClassList;
	while (classobj) {
		int numSubclasses;
		numSubclasses = slotRawInt(&classobj->subclasses);
		//postfl("  %s %d\n", slotRawSymbol(&classobj->name)->name, numSubclasses);
		if (numSubclasses) {
			SetObject(&classobj->subclasses, (PyrObject*)newPyrArray(NULL, numSubclasses, obj_permanent | obj_immutable, false));
			slotRawObject(&classobj->subclasses)->size = 0;
		} else {
			SetNil(&classobj->subclasses);
		}
		classobj = slotRawClass(&classobj->nextclass);
	}
	// fill in subclass arrays
	//postfl("fill in subclass arrays\n");
	classobj = gClassList;
	while (classobj) {
		//postfl("  %s\n", slotRawSymbol(&classobj->name)->name);
		PyrClass *superclassobj = slotRawSymbol(&classobj->superclass)->u.classobj;
		if (superclassobj) {
			objAddIndexedObject(slotRawObject(&superclassobj->subclasses), (PyrObject*)classobj);
			//postfl("     superclassobj %s %d\n", slotRawSymbol(&superclassobj->name)->name,
			//	slotRawObject(&superclassobj->subclasses)->size);
		}
		classobj = slotRawClass(&classobj->nextclass);
	}

	// alpha sort the classes via insertion sort
	gClassList = sortClasses(gClassList);
}

void indexClassTree(PyrClass *classobj, int numSuperMethods)
{
	int i, numMethods;

	if (!classobj) return;

	SetInt(&classobj->classIndex, gNumClasses);
	gNumClasses ++;

	if (IsObj(&classobj->methods)) {
		PyrObject * methods = slotRawObject(&classobj->methods);
		numMethods = methods->size;
	}
	else
		numMethods = 0;

	numMethods = numSuperMethods + numMethods;
	if (IsObj(&classobj->subclasses)) {
		PyrObject * subclasses = slotRawObject(&classobj->subclasses);
		for (i=0; i<subclasses->size; ++i)
			indexClassTree(slotRawClass(&subclasses->slots[i]), numMethods);
	}
	SetInt(&classobj->maxSubclassIndex,  gNumClasses - 1);
}

void findDiscrepancy();
void findDiscrepancy()
{
	PyrClass *classobjA, *classobjB;

	classobjA = gClassList;
	while (classobjA) {
		classobjB = slotRawClass(&classobjA->nextclass);;
		while (classobjB) {
			if (slotRawSymbol(&classobjA->name) == slotRawSymbol(&classobjB->name)) {
				post("duplicate %s\n", slotRawSymbol(&classobjA->name)->name);
			}
			classobjB = slotRawClass(&classobjB->nextclass);
		}
		classobjA = slotRawClass(&classobjA->nextclass);
	}
}


static void indent(int n)
{
	for (int i=0; i<n; ++i) {
		post("  ");
	}
}

void postClassTree(PyrClass *classobj, int level)
{
	PyrObject *subclasses;
	int i;

	//post("%4d  ", slotRawInt(&classobj->classIndex));
	indent(level);
	post("%s\n", slotRawSymbol(&classobj->name)->name);

	if (classobj == class_class) {
		indent(level+1);
		post("      [.. all metaclasses ..]\n");
	} else {
		if (IsNil(&classobj->subclasses))
			return; // FIXME: can we initialize subclasses with a NULL pointer?
		subclasses = slotRawObject(&classobj->subclasses);
		if (subclasses) {
			// determine if can put on one line
			bool oneline = subclasses->size <= 5;
			for (i=0; oneline && i<subclasses->size; ++i) {
				PyrClass *subclassobj = slotRawClass(&subclasses->slots[i]);
				if (IsObj(&subclassobj->subclasses))
					// FIXME: shall we do a null-pointer check?
					oneline = false;
			}
			if (oneline) {
				indent(level+1);
				post("[");
				for (i=0; i<subclasses->size; ++i) {
					PyrClass *subclassobj = slotRawClass(&subclasses->slots[i]);
					post(" %s", slotRawSymbol(&subclassobj->name)->name);
				}
				post(" ]\n");
			} else {
				indent(level);
				post("[\n");
				for (i=0; i<subclasses->size; ++i) {
					postClassTree(slotRawClass(&subclasses->slots[i]), level+1);
				}
				indent(level);
				post("]\n");
			}
		}
	}
}


void setSelectorFlags()
{
	int i;

	PyrClass * classobj = gClassList;
	while (classobj) {
		if (IsObj(&classobj->methods)) {
			PyrObject *methods = slotRawObject(&classobj->methods);
			for (i=0; i<methods->size; ++i) {
				PyrMethod * method = slotRawMethod(&methods->slots[i]);
				slotRawSymbol(&method->name)->flags |= sym_Selector;
				//if (method->methType == methRedirect) {
				//	post("rd: %3d %s:%s\n", k++, slotRawSymbol(&classobj->name)->name,
				//		slotRawSymbol(&method->name)->name);
				//}
			}
		}
		classobj = slotRawClass(&classobj->nextclass);
	}
	// count selectors
	gNumSelectors = 0;
	SymbolTable* symbolTable = gMainVMGlobals->symbolTable;
	for (int i=0; i<symbolTable->TableSize(); ++i) {
		PyrSymbol *sym = symbolTable->Get(i);
		if (sym && (sym->flags & sym_Selector)) {
			sym->u.index = gNumSelectors++;
		}
	}
	//post("gNumSelectors %d\n", gNumSelectors);
}

// the chunky stuff can be commented back in for implementing a better
// compression scheme. The Q&D method works fine for my small class tree for now.

typedef struct {
	PyrSymbol *selector;
	int minClassIndex;
	int maxClassIndex;
	int rowWidth;
	//int largestChunk;
	//int chunkOffset;
	int selectorIndex;
	int population;
	int rowOffset;
} ColumnDescriptor;

int compareColDescs(const void *va, const void *vb);
int compareColDescs(const void *va, const void *vb)
{
        ColumnDescriptor *a = (ColumnDescriptor*)va;
        ColumnDescriptor *b = (ColumnDescriptor*)vb;
	int diff;
	//diff = b->largestChunk - a->largestChunk;
	//if (diff != 0) return diff;
	diff = b->rowWidth - a->rowWidth;
	if (diff != 0) return diff;
	//diff = b->chunkOffset - a->chunkOffset;
	diff = b->minClassIndex - a->minClassIndex;
	return diff;
}

#define CHECK_METHOD_LOOKUP_TABLE_BUILD_TIME 0
#if CHECK_METHOD_LOOKUP_TABLE_BUILD_TIME
double elapsedTime();
#endif

static size_t fillClassRow(PyrClass *classobj, PyrMethod** bigTable);


static void updateSelectorRowWidth(ColumnDescriptor* sels, size_t begin, size_t end)
{
	for (int i=begin; i<end; ++i) {
		//if (chunkSize > sels[i].largestChunk) {
		//	sels[i].largestChunk = chunkSize;
		//	sels[i].chunkOffset = chunkOffset;
		//}
		sels[i].rowWidth = sels[i].maxClassIndex - sels[i].minClassIndex + 1;
	}
}

static void binsortClassRows(PyrMethod ** bigTable, const ColumnDescriptor* sels, size_t numSelectors, size_t begin, size_t end)
{
	// bin sort the class rows to the new ordering
	//post("reorder rows\n");
	const int allocaThreshold = 4096;

	PyrMethod** temprow = (numSelectors < allocaThreshold) ? (PyrMethod**)alloca(numSelectors * sizeof(PyrMethod*))
														   : (PyrMethod**)malloc(numSelectors * sizeof(PyrMethod*));

	for (int j=begin; j<end; ++j) {
		PyrMethod** row = bigTable + j * numSelectors;
		memcpy(temprow, row, numSelectors * sizeof(PyrMethod*));
		for (int i=0; i<numSelectors; ++i)
			row[i] = temprow[sels[i].selectorIndex];
	}

	if (numSelectors >= allocaThreshold)
		free(temprow);
}

static void prepareColumnTable(ColumnDescriptor * sels, int numSelectors)
{
	// fill selector table
	//post("fill selector table\n");
	SymbolTable* symbolTable = gMainVMGlobals->symbolTable;
	for (int i=0, j=0; i<symbolTable->TableSize(); ++i) {
		PyrSymbol *sym = symbolTable->Get(i);
		if (sym && (sym->flags & sym_Selector))
			sels[j++].selector = sym;
	}

	for (int i=0; i<numSelectors; ++i) {
		//postfl("%3d %s\n", i, sels[i].selector->name);
		sels[i].minClassIndex = INT_MAX;
		sels[i].maxClassIndex = 0;
		//sels[i].largestChunk = 0;
		//sels[i].chunkOffset = 0;
		sels[i].selectorIndex = i;
		sels[i].population = 0;
	}
}

static void calcRowStats(PyrMethod** bigTable, ColumnDescriptor * sels, int numClasses, int numSelectors, int begin, int end)
{
		//chunkSize = 0;
		//chunkOffset = 0;
	for (int j=0; j<numClasses; ++j) {
		for (int i=begin; i<end; ++i) {
			PyrMethod* method = bigTable[j * numSelectors + i];
			if (method) {
				//classobj = method->ownerclass.uoc;
				if (j > sels[i].maxClassIndex) {
					sels[i].maxClassIndex = j;
				}
				if (j < sels[i].minClassIndex) {
					sels[i].minClassIndex = j;
				}
				sels[i].population ++;
				//if (chunkSize == 0) chunkOffset = j;
				//chunkSize++;
				//postfl("    %8s %3d %3d %3d %3d\n", slotRawSymbol(&classobj->name)->name, i, j,
				//	chunkSize, slotRawInt(&classobj->classIndex));
			//} else {
				//if (chunkSize > sels[i].largestChunk) {
				//	sels[i].largestChunk = chunkSize;
				//	sels[i].chunkOffset = chunkOffset;
				//}
				//chunkSize = 0;
			}
		}
	}
}


void buildBigMethodMatrix()
{
	PyrMethod **bigTable, **row;
	PyrClass *classobj, **classes;
	int i, j, k;
	int popSum, widthSum;
	int rowOffset, freeIndex;
	int rowTableSize;
	int bigTableSize;
	const int numSelectors = gNumSelectors;
	const int numClasses = gNumClasses;
	//post("allocate arrays\n");

#if CHECK_METHOD_LOOKUP_TABLE_BUILD_TIME
	double t0 = elapsedTime();
#endif

	// pyrmalloc:
	// lifetime: kill after compile
	bigTableSize = numSelectors * numClasses;
	//post("bigTableSize %d %d %d\n", bigTableSize, numSelectors, numClasses);
	ColumnDescriptor *sels = (ColumnDescriptor*)pyr_pool_compile->Alloc(numSelectors * sizeof(ColumnDescriptor));
	MEMFAIL(sels);
	if (helperThreadCount)
		compileThreadPool.schedule(std::bind(&prepareColumnTable, sels, numSelectors));
	else
		prepareColumnTable(sels, numSelectors);

	bigTable = (PyrMethod**)pyr_pool_compile->Alloc(bigTableSize * sizeof(PyrMethod*));
	MEMFAIL(bigTable);
	classes = (PyrClass**)pyr_pool_compile->Alloc(numClasses * sizeof(PyrClass*));
	MEMFAIL(classes);

	classobj = gClassList;
	while (classobj) {
		classes[slotRawInt(&classobj->classIndex)] = classobj;
		classobj = slotRawClass(&classobj->nextclass);
	}

	size_t numentries = fillClassRow(class_object, bigTable);
	post("\tnumentries = %lu / %d = %.2g\n", numentries, bigTableSize, (double)numentries/(double)bigTableSize);

	// no need to wait for the theadpool, because it is done in fillClassRow

	// calc row stats
	//post("calc row stats\n");
	const int classesPerThread = numClasses/cpuCount;
	const int selectorsPerThread = numSelectors/cpuCount;
	for (i = 0; i != helperThreadCount; ++i)
		compileThreadPool.schedule(std::bind(&calcRowStats, bigTable, sels, numClasses, numSelectors,
											   selectorsPerThread * i, selectorsPerThread * (i+1)));

	calcRowStats(bigTable, sels, numClasses, numSelectors, helperThreadCount*selectorsPerThread, numSelectors);
	if (helperThreadCount) compileThreadPool.wait();

	for (i = 0; i != helperThreadCount; ++i)
		compileThreadPool.schedule(std::bind(&updateSelectorRowWidth, sels,
											   selectorsPerThread * i, selectorsPerThread * (i+1)));

	updateSelectorRowWidth(sels, helperThreadCount*selectorsPerThread, numSelectors);
	if (helperThreadCount) compileThreadPool.wait();

	//post("qsort\n");
	// sort rows by largest chunk, then by width, then by chunk offset
	//qsort(sels, numSelectors, sizeof(ColumnDescriptor), (std::_compare_function)compareColDescs);
	qsort(sels, numSelectors, sizeof(ColumnDescriptor), compareColDescs);

	// bin sort the class rows to the new ordering
	//post("reorder rows\n");
	for (i = 0; i != helperThreadCount; ++i)
		compileThreadPool.schedule(std::bind(&binsortClassRows, bigTable, sels, numSelectors,
											   classesPerThread * i, classesPerThread * (i+1)));

	binsortClassRows(bigTable, sels, numSelectors, helperThreadCount*classesPerThread, numClasses);
	if (helperThreadCount) compileThreadPool.wait();

	//post("calc row offsets %d\n", numSelectors);
	widthSum = 0;
	popSum = 0;
	freeIndex = 0;
	rowOffset = -1;
	for (i=0; i<numSelectors; ++i) {
		widthSum += sels[i].rowWidth;
		popSum += sels[i].population;
		rowOffset = sc_max(rowOffset+1, freeIndex - sels[i].minClassIndex);
		freeIndex = rowOffset + sels[i].maxClassIndex + 1;
		sels[i].rowOffset = rowOffset;
		sels[i].selector->u.index = rowOffset;
		//post("%3d  %24s %3d %5d %5d\n", i, sels[i].selector->name,
		//	sels[i].rowWidth, rowOffset, freeIndex);
	}
	//post("alloc row table %d\n", freeIndex);
	rowTableSize = (freeIndex + numClasses)  * sizeof(PyrMethod*);
	gRowTable = (PyrMethod**)pyr_pool_runtime->Alloc(rowTableSize);
	MEMFAIL(gRowTable);

	// having the method ptr always be valid saves a branch in SendMessage()
	for (i=0; i<freeIndex + numClasses; ++i)
		gRowTable[i] = gNullMethod;

	//post("fill compressed table\n");
	//{ FILE* fp;
	// newPyrMethod
	//fp = fopen("meth table", "w");
	for (i=0; i<numSelectors; ++i) {
		int offset, maxwidth;
		offset = sels[i].rowOffset + sels[i].minClassIndex;
		maxwidth = offset + sels[i].rowWidth;
		row = bigTable + sels[i].minClassIndex * numSelectors + i;
		PyrMethod ** table = gRowTable;
		for (j=offset,k=0; j<maxwidth; ++j, k+=numSelectors) {
			if (row[k])
				table[j] = row[k];
		}
	}
	//fclose(fp);
	//}

	for (i=0; i<freeIndex + numClasses; ++i)
		assert(gRowTable[i]);


	//post("freeIndex %d\n", freeIndex);
	//post("widthSum %d\n", widthSum);
	//post("popSum %d\n", popSum);

#if CHECK_METHOD_LOOKUP_TABLE_BUILD_TIME
	post("building table took %.3g seconds\n", elapsedTime() - t0);
	{
		int numFilled = 0;
		for (i=0; i<rowTableSize/sizeof(PyrMethod*); ++i) {
			if (gRowTable[i] != gNullMethod) numFilled++;
		}
		post("Filled %d of %d = %f percent\n", numFilled, rowTableSize/sizeof(PyrMethod*),
			100. * (double)numFilled/(rowTableSize/sizeof(PyrMethod*)));
	}
#endif
	post("\t%d method selectors, %d classes\n", numSelectors, numClasses);
	post("\tmethod table size %d bytes, ", rowTableSize);
	post("big table size %d\n", numSelectors * numClasses * sizeof(PyrMethod*));
	//postfl("%p %p %p\n", classes, bigTable, sels);
/*
	// not necessary since the entire pool will be freed..
	pyr_pool_compile->Free(classes);
	pyr_pool_compile->Free(bigTable);
	pyr_pool_compile->Free(sels);
*/
	compileThreadPool.size_controller().resize(0); // terminate threads
}

#include <boost/atomic.hpp>

static void fillClassRowSubClasses(PyrObject * subclasses, int begin, int end, PyrMethod** bigTable, std::atomic<size_t> * rCount);

static void fillClassRow(PyrClass *classobj, PyrMethod** bigTable, std::atomic<size_t> * rCount)
{
	size_t count = 0;

	PyrMethod ** myrow = bigTable + slotRawInt(&classobj->classIndex) * gNumSelectors;
	PyrClass* superclassobj = slotRawSymbol(&classobj->superclass)->u.classobj;
	if (superclassobj) {
		PyrMethod ** superrow = bigTable + slotRawInt(&superclassobj->classIndex) * gNumSelectors;

		for (int i = 0; i != gNumSelectors; ++i) {
			myrow[i] = superrow[i];
			if (superrow[i])
				++count;
		}
	} else {
		memset(myrow, 0, gNumSelectors * sizeof(PyrMethod*));
	}

	if (IsObj(&classobj->methods)) {
		PyrObject * methods = slotRawObject(&classobj->methods);
		//postfl("        %d\n", methods->size);
		for (int i=0; i<methods->size; ++i) {
			PyrMethod* method = slotRawMethod(&methods->slots[i]);
			int selectorIndex = slotRawSymbol(&method->name)->u.index;

			if (myrow[selectorIndex] == 0)
				++count;

			myrow[selectorIndex] = method;
		}
	}

	*rCount += count;

	if (IsObj(&classobj->subclasses)) {
		PyrObject * subclasses = slotRawObject(&classobj->subclasses);
		size_t numSubclasses = subclasses->size;

		if (numSubclasses > 4*cpuCount) {
			int subclassesPerThread = numSubclasses / cpuCount;
			for (int i = 0; i != helperThreadCount; ++i)
				compileThreadPool.schedule(std::bind(&fillClassRowSubClasses, subclasses,
													   subclassesPerThread * i, subclassesPerThread * (i+1),
													   bigTable, rCount));
			fillClassRowSubClasses(subclasses, subclassesPerThread * helperThreadCount, numSubclasses, bigTable, rCount);
		}
		else
			fillClassRowSubClasses(subclasses, 0, numSubclasses, bigTable, rCount);
	}
}

static void fillClassRowSubClasses(PyrObject * subclasses, int begin, int end, PyrMethod** bigTable, std::atomic<size_t> * rCount)
{
	for (int i = begin; i != end; ++i)
		fillClassRow(slotRawClass(&subclasses->slots[i]), bigTable, rCount);
}


static size_t fillClassRow(PyrClass *classobj, PyrMethod** bigTable)
{
	std::atomic<size_t> ret (0);

	fillClassRow(classobj, bigTable, &ret);
	if (helperThreadCount) compileThreadPool.wait();
	return ret.load(std::memory_order_acquire);
}


bool funcFindArg(PyrBlock* func, PyrSymbol *name, int *index)
{
	int i;
	for (i=0; i<slotRawSymbolArray(&func->argNames)->size; ++i) {
		if (slotRawSymbolArray(&func->argNames)->symbols[i] == name) {
			*index = i;
			return true;
		}
	}
	return false;
}

bool funcFindVar(PyrBlock* func, PyrSymbol *name, int *index)
{
	int i;
	for (i=0; i<slotRawSymbolArray(&func->varNames)->size; ++i) {
		if (slotRawSymbolArray(&func->varNames)->symbols[i] == name) {
			*index = i;
			return true;
		}
	}
	return false;
}

PyrClass* makeIntrinsicClass(PyrSymbol *className, PyrSymbol *superClassName,
	int numInstVars, int numClassVars)
{
	PyrClass *superClass = NULL;
	PyrClass *metaSuperClass = NULL;
	PyrSymbol *metaClassName = NULL;
	PyrSymbol *metaSuperClassName = NULL;
	PyrClass *classobj = NULL;
	PyrClass *metaclassobj = NULL;
	int superInstVars;

	//postfl("makeIntrinsicClass '%s'\n", className->name);
	if (superClassName) {
		superClass = superClassName->u.classobj;
		if (!superClass) {
			error("Can't find superclass '%s' of '%s'\n", superClassName->name,
				className->name);
			return NULL;
		}
		metaSuperClassName = getmetasym(superClassName->name);
		metaSuperClass = metaSuperClassName->u.classobj;
		superInstVars = numSuperInstVars(superClass);
	} else {
		// else it must be Object and so has no superclass
		metaSuperClassName = NULL;
		superInstVars = 0;
	}

	metaClassName = getmetasym(className->name);
	metaClassName->flags |= sym_MetaClass;
	metaclassobj = newClassObj( class_class,
		metaClassName, metaSuperClassName,
		classClassNumInstVars, 0, 0, 0, obj_notindexed, 0);
	SetInt(&metaclassobj->classFlags, slotRawInt(&metaclassobj->classFlags) | classIsIntrinsic);

	if (metaSuperClassName && classClassNumInstVars) {
		memcpy(slotRawObject(&metaclassobj->iprototype)->slots, slotRawObject(&metaSuperClass->iprototype)->slots,
			sizeof(PyrSlot) * classClassNumInstVars);
		memcpy(slotRawSymbolArray(&metaclassobj->instVarNames)->symbols,
			slotRawSymbolArray(&metaSuperClass->instVarNames)->symbols,
			sizeof(PyrSymbol*) * classClassNumInstVars);
		slotRawObject(&metaclassobj->iprototype)->size = classClassNumInstVars;
		slotRawObject(&metaclassobj->instVarNames)->size = classClassNumInstVars;
		//dumpObject((PyrObject*)metaclassobj);
	}

	classobj = newClassObj(metaclassobj,
		className, superClassName,
		numInstVars + superInstVars, numClassVars, 0, 0, obj_notindexed, 0);
	SetInt(&classobj->classFlags, slotRawInt(&classobj->classFlags) | classIsIntrinsic);

	//postfl("%s:%s  : %d\n", className->name, superClassName->name, superInstVars);
	if (superClass && superInstVars) {
		memcpy(slotRawObject(&classobj->iprototype)->slots, slotRawObject(&superClass->iprototype)->slots,
			sizeof(PyrSlot) * superInstVars);
		memcpy(slotRawSymbolArray(&classobj->instVarNames)->symbols,
			slotRawSymbolArray(&superClass->instVarNames)->symbols,
			sizeof(PyrSymbol*) * superInstVars);
		slotRawObject(&classobj->iprototype)->size = superInstVars;
		slotRawObject(&classobj->instVarNames)->size = superInstVars;
	}

	return classobj;
}

void addIntrinsicVar(PyrClass *classobj, const char *varName, PyrSlot *slot)
{
	//postfl("%s  %s  %d\n", slotRawSymbol(&classobj->name)->name, varName,
	//	slotRawObject(&classobj->instVarNames)->size);
	objAddIndexedSymbol(slotRawSymbolArray(&classobj->instVarNames), getsym(varName));
	objAddIndexedSlot(slotRawObject(&classobj->iprototype), slot);
}

void addIntrinsicClassVar(PyrClass *classobj, const char *varName, PyrSlot *slot);
void addIntrinsicClassVar(PyrClass *classobj, const char *varName, PyrSlot *slot)
{
	//postfl("%s  %s  %d\n", slotRawSymbol(&classobj->name)->name, varName,
	//	slotRawObject(&classobj->instVarNames)->size);
	objAddIndexedSymbol(slotRawSymbolArray(&classobj->classVarNames), getsym(varName));
	objAddIndexedSlot(slotRawObject(&classobj->cprototype), slot);
}

void initClasses()
{
	PyrClass *class_object_meta;
	PyrMethodRaw *methraw;

	// BOOTSTRAP THE OBJECT HIERARCHY

	gNumClassVars = 0;
	gClassList = NULL;
	gNullMethod = newPyrMethod();
	SetSymbol(&gNullMethod->name, (PyrSymbol*)NULL);
	methraw = METHRAW(gNullMethod);
	methraw->methType = methNormal;

	// build intrinsic classes
	class_class = NULL;
	class_object = makeIntrinsicClass(s_object, 0, 0, 4);
	class_class = makeIntrinsicClass(s_class, s_object, classClassNumInstVars, 1);

	// now fix class_class ptrs that were just previously installed erroneously
	class_object->classptr->classptr = class_class;
	class_class->classptr->classptr = class_class;
	class_object_meta = class_object->classptr;
	class_object_meta->superclass = class_class->name;

		addIntrinsicClassVar(class_object, "dependantsDictionary", &o_nil);
		addIntrinsicClassVar(class_object, "currentEnvironment", &o_nil);
		addIntrinsicClassVar(class_object, "topEnvironment", &o_nil);
		addIntrinsicClassVar(class_object, "uniqueMethods", &o_nil);

		// declare varNames for Class

		addIntrinsicVar(class_class, "name", &o_nil);
		addIntrinsicVar(class_class, "nextclass", &o_nil);
		addIntrinsicVar(class_class, "superclass", &o_nil);
		addIntrinsicVar(class_class, "subclasses", &o_nil);
		addIntrinsicVar(class_class, "methods", &o_nil);

		addIntrinsicVar(class_class, "instVarNames", &o_nil);
		addIntrinsicVar(class_class, "classVarNames", &o_nil);
		addIntrinsicVar(class_class, "iprototype", &o_nil);
		addIntrinsicVar(class_class, "cprototype", &o_nil);

		addIntrinsicVar(class_class, "constNames", &o_nil);
		addIntrinsicVar(class_class, "constValues", &o_nil);

		addIntrinsicVar(class_class, "instanceFormat", &o_nil);
		addIntrinsicVar(class_class, "instanceFlags", &o_zero);
		addIntrinsicVar(class_class, "classIndex", &o_zero);
		addIntrinsicVar(class_class, "classFlags", &o_zero);
		addIntrinsicVar(class_class, "maxSubclassIndex", &o_zero);
		addIntrinsicVar(class_class, "filenameSymbol", &o_nil);
		addIntrinsicVar(class_class, "charPos", &o_zero);
		addIntrinsicVar(class_class, "classVarIndex", &o_zero);

		addIntrinsicClassVar(class_class, "classesInited", &o_nil);

	// class_object_meta's inst var names need to be copied from class_class
	// because class_class didn't exist when it was created
	memcpy(slotRawObject(&class_object_meta->iprototype)->slots, slotRawObject(&class_class->iprototype)->slots,
		sizeof(PyrSlot) * classClassNumInstVars);
	memcpy(slotRawSymbolArray(&class_object_meta->instVarNames)->symbols,
		slotRawSymbolArray(&class_class->instVarNames)->symbols,
		sizeof(PyrSymbol*) * classClassNumInstVars);

	memcpy(slotRawObject(&class_class->classptr->iprototype)->slots, slotRawObject(&class_class->iprototype)->slots,
		sizeof(PyrSlot) * classClassNumInstVars);
	memcpy(slotRawSymbolArray(&class_class->classptr->instVarNames)->symbols,
		slotRawSymbolArray(&class_class->instVarNames)->symbols,
		sizeof(PyrSymbol*) * classClassNumInstVars);


	// OK the next thing I need is arrays..
	class_collection = makeIntrinsicClass(s_collection, s_object, 0, 0);
	class_sequenceable_collection = makeIntrinsicClass(s_sequenceable_collection, s_collection, 0, 0);

	class_arrayed_collection = makeIntrinsicClass(s_arrayed_collection, s_sequenceable_collection, 0, 0);
	class_array = makeIntrinsicClass(s_array, s_arrayed_collection, 0, 0);
		SetInt(&class_array->instanceFormat, obj_slot);
		SetInt(&class_array->classFlags, slotRawInt(&class_array->classFlags) | classHasIndexableInstances);

	// now fix array classptrs in already created classes
	fixClassArrays(class_class);
	fixClassArrays(class_class->classptr);
	fixClassArrays(class_object_meta);
	fixClassArrays(class_collection);
	fixClassArrays(class_sequenceable_collection);
	fixClassArrays(class_arrayed_collection);
	fixClassArrays(class_array);

	class_fundef = makeIntrinsicClass(s_fundef, s_object, 10, 0);
		// declare varNames for Block

		addIntrinsicVar(class_fundef, "raw1", &o_nil);
		addIntrinsicVar(class_fundef, "raw2", &o_nil);
		addIntrinsicVar(class_fundef, "code", &o_nil);
		addIntrinsicVar(class_fundef, "selectors", &o_nil);
		addIntrinsicVar(class_fundef, "constants", &o_nil);

		addIntrinsicVar(class_fundef, "prototypeFrame", &o_nil);
		addIntrinsicVar(class_fundef, "context", &o_nil);
		addIntrinsicVar(class_fundef, "argNames", &o_nil);
		addIntrinsicVar(class_fundef, "varNames", &o_nil);
		addIntrinsicVar(class_fundef, "sourceCode", &o_nil);

	class_method = makeIntrinsicClass(s_method, s_fundef, 5, 0);
		addIntrinsicVar(class_method, "ownerClass", &o_nil);
		addIntrinsicVar(class_method, "name", &o_nil);
		addIntrinsicVar(class_method, "primitiveName", &o_nil);
		addIntrinsicVar(class_method, "filenameSymbol", &o_nil);
		addIntrinsicVar(class_method, "charPos", &o_zero);
		//addIntrinsicVar(class_method, "byteMeter", &o_zero);
		//addIntrinsicVar(class_method, "callMeter", &o_zero);

	class_frame = makeIntrinsicClass(s_frame, s_object, 0, 0);
		SetInt(&class_frame->classFlags, slotRawInt(&class_frame->classFlags) | classHasIndexableInstances);
		//addIntrinsicVar(class_frame, "method", &o_nil);
		//addIntrinsicVar(class_frame, "caller", &o_nil);
		//addIntrinsicVar(class_frame, "context", &o_nil);
		//addIntrinsicVar(class_frame, "homeContext", &o_nil);
		//addIntrinsicVar(class_frame, "ip", &o_nil);

	class_process = makeIntrinsicClass(s_process, s_object, 6, 0);
		addIntrinsicVar(class_process, "classVars", &o_nil);
		addIntrinsicVar(class_process, "interpreter", &o_nil);
		addIntrinsicVar(class_process, "curThread", &o_nil);
		addIntrinsicVar(class_process, "mainThread", &o_nil);
		addIntrinsicVar(class_process, "schedulerQueue", &o_nil);
		addIntrinsicVar(class_process, "nowExecutingPath", &o_nil);

	class_interpreter = makeIntrinsicClass(s_interpreter, s_object, 29, 0);
		addIntrinsicVar(class_interpreter, "cmdLine", &o_nil);
		addIntrinsicVar(class_interpreter, "context", &o_nil);
		for (int i=0; i<26; ++i) {
			char name[2];
			name[0] = 'a' + i;
			name[1] = 0;
			addIntrinsicVar(class_interpreter, name, &o_nil);
		}
		addIntrinsicVar(class_interpreter, "codeDump", &o_nil);
		addIntrinsicVar(class_interpreter, "preProcessor", &o_nil);

	class_absfunc = makeIntrinsicClass(s_absfunc, s_object, 0, 0);
	class_stream = makeIntrinsicClass(s_stream, s_absfunc, 0, 0);

	class_thread = makeIntrinsicClass(s_thread, s_stream, 27, 0);
		addIntrinsicVar(class_thread, "state", &o_nil);
		addIntrinsicVar(class_thread, "func", &o_nil);
		addIntrinsicVar(class_thread, "stack", &o_nil);
		addIntrinsicVar(class_thread, "method", &o_nil);
		addIntrinsicVar(class_thread, "block", &o_nil);
		addIntrinsicVar(class_thread, "frame", &o_nil);
		addIntrinsicVar(class_thread, "ip", &o_zero);
		addIntrinsicVar(class_thread, "sp", &o_zero);
		addIntrinsicVar(class_thread, "numpop", &o_zero);
		addIntrinsicVar(class_thread, "receiver", &o_nil);
		addIntrinsicVar(class_thread, "numArgsPushed", &o_zero);
		addIntrinsicVar(class_thread, "parent", &o_nil);
		addIntrinsicVar(class_thread, "terminalValue", &o_nil);

		addIntrinsicVar(class_thread, "primitiveError", &o_zero);
		addIntrinsicVar(class_thread, "primitiveIndex", &o_zero);
		addIntrinsicVar(class_thread, "randData", &o_zero);
		addIntrinsicVar(class_thread, "beats", &o_fzero);
		addIntrinsicVar(class_thread, "seconds", &o_fzero);
		addIntrinsicVar(class_thread, "clock", &o_nil);
		addIntrinsicVar(class_thread, "nextBeat", &o_nil);
		addIntrinsicVar(class_thread, "endBeat", &o_nil);
		addIntrinsicVar(class_thread, "endValue", &o_nil);

		addIntrinsicVar(class_thread, "environment", &o_nil);
		addIntrinsicVar(class_thread, "exceptionHandler", &o_nil);
		addIntrinsicVar(class_thread, "threadPlayer", &o_nil);

		addIntrinsicVar(class_thread, "executingPath", &o_nil);
		addIntrinsicVar(class_thread, "oldExecutingPath", &o_nil);

	class_finalizer = makeIntrinsicClass(s_finalizer, s_object, 2, 0);
		addIntrinsicVar(class_finalizer, "cFunction", &o_nil);
		addIntrinsicVar(class_finalizer, "object", &o_nil);

	class_routine = makeIntrinsicClass(s_routine, s_thread, 0, 0);

	class_symbol = makeIntrinsicClass(s_symbol, s_object, 0, 0);
	class_nil = makeIntrinsicClass(s_nil, s_object, 0, 0);

	class_boolean = makeIntrinsicClass(s_boolean, s_object, 0, 0);
	class_true = makeIntrinsicClass(s_true, s_boolean, 0, 0);
	class_false = makeIntrinsicClass(s_false, s_boolean, 0, 0);

	class_magnitude = makeIntrinsicClass(s_magnitude, s_object, 0, 0);
	class_char = makeIntrinsicClass(s_char, s_magnitude, 0, 0);
	class_number = makeIntrinsicClass(s_number, s_magnitude, 0, 0);
	class_simple_number = makeIntrinsicClass(s_simple_number, s_number, 0, 0);
	class_int = makeIntrinsicClass(s_int, s_simple_number, 0, 0);
	class_float = makeIntrinsicClass(s_float, s_simple_number, 0, 0);

	class_rawptr = makeIntrinsicClass(s_rawptr, s_object, 0, 0);

/*
	class_complex = makeIntrinsicClass(s_complex, s_number, 2, 0);
		addIntrinsicVar(class_complex, "real", &o_nil);
		addIntrinsicVar(class_complex, "imag", &o_nil);
*/

	class_rawarray = makeIntrinsicClass(s_rawarray, s_arrayed_collection, 0, 0);
		//SetInt(&class_rawarray->instanceFormat, obj_int8);
		//slotRawInt(&class_rawarray->classFlags) |= classHasIndexableInstances;
	class_int8array = makeIntrinsicClass(s_int8array, s_rawarray, 0, 0);
		SetInt(&class_int8array->instanceFormat, obj_int8);
		SetInt(&class_int8array->classFlags, slotRawInt(&class_int8array->classFlags) | classHasIndexableInstances);
	class_int16array = makeIntrinsicClass(s_int16array, s_rawarray, 0, 0);
		SetInt(&class_int16array->instanceFormat, obj_int16);
		SetInt(&class_int16array->classFlags, slotRawInt(&class_int16array->classFlags) | classHasIndexableInstances);
	class_int32array = makeIntrinsicClass(s_int32array, s_rawarray, 0, 0);
		SetInt(&class_int32array->instanceFormat, obj_int32);
		SetInt(&class_int32array->classFlags, slotRawInt(&class_int32array->classFlags) | classHasIndexableInstances);
	class_symbolarray = makeIntrinsicClass(s_symbolarray, s_rawarray, 0, 0);
		SetInt(&class_symbolarray->instanceFormat, obj_symbol);
		SetInt(&class_symbolarray->classFlags, slotRawInt(&class_symbolarray->classFlags) | classHasIndexableInstances);
	class_string = makeIntrinsicClass(s_string, s_rawarray, 0, 1);
		addIntrinsicClassVar(class_string, "unixCmdActions", &o_nil);
		SetInt(&class_string->instanceFormat, obj_char);
		SetInt(&class_string->classFlags, slotRawInt(&class_string->classFlags) | classHasIndexableInstances);
	class_floatarray = makeIntrinsicClass(s_floatarray, s_rawarray, 0, 0);
		SetInt(&class_floatarray->instanceFormat, obj_float);
		SetInt(&class_floatarray->classFlags, slotRawInt(&class_floatarray->classFlags) | classHasIndexableInstances);
	class_signal = makeIntrinsicClass(s_signal, s_floatarray, 0, 0);
		SetInt(&class_signal->instanceFormat, obj_float);
		SetInt(&class_signal->classFlags, slotRawInt(&class_signal->classFlags) | classHasIndexableInstances);
	class_wavetable = makeIntrinsicClass(s_wavetable, s_floatarray, 0, 0);
		SetInt(&class_wavetable->instanceFormat, obj_float);
		SetInt(&class_wavetable->classFlags, slotRawInt(&class_wavetable->classFlags) | classHasIndexableInstances);

		//addIntrinsicVar(class_signal, "rate", &o_nil);
	class_doublearray = makeIntrinsicClass(s_doublearray, s_rawarray, 0, 0);
		SetInt(&class_doublearray->instanceFormat, obj_double);
		SetInt(&class_doublearray->classFlags, slotRawInt(&class_doublearray->classFlags) | classHasIndexableInstances);

	class_list = makeIntrinsicClass(s_list, s_sequenceable_collection, 1, 0);
		addIntrinsicVar(class_list, "array", &o_nil);
		//addIntrinsicVar(class_list, "size", &o_zero);

	class_func = makeIntrinsicClass(s_func, s_absfunc, 2, 0);
		addIntrinsicVar(class_func, "def", &o_nil);
		addIntrinsicVar(class_func, "context", &o_nil);

	class_server_shm_interface = makeIntrinsicClass(s_server_shm_interface, s_object, 2, 0);
		addIntrinsicVar(class_server_shm_interface, "ptr", &o_nil);
		addIntrinsicVar(class_server_shm_interface, "finalizer", &o_nil);

	gTagClassTable[ 0] = NULL;
	gTagClassTable[ 1] = NULL;
	gTagClassTable[ 2] = class_int;
	gTagClassTable[ 3] = class_symbol;
	gTagClassTable[ 4] = class_char;
	gTagClassTable[ 5] = class_nil;
	gTagClassTable[ 6] = class_false;
	gTagClassTable[ 7] = class_true;
	gTagClassTable[ 8] = class_rawptr;
	gTagClassTable[ 9] = class_float;
	gTagClassTable[10] = class_float;
	gTagClassTable[11] = class_float;
	gTagClassTable[12] = class_float;

	SetObject(&o_emptyarray, newPyrArray(NULL, 0, obj_permanent | obj_immutable, false));

	SetObject(&o_onenilarray, newPyrArray(NULL, 1, obj_permanent | obj_immutable, false));
	slotRawObject(&o_onenilarray)->size = 1;
	SetNil(slotRawObject(&o_onenilarray)->slots);

	SetObject(&o_argnamethis, newPyrSymbolArray(NULL, 1, obj_permanent | obj_immutable, false));
	slotRawSymbolArray(&o_argnamethis)->size = 1;
	slotRawSymbolArray(&o_argnamethis)->symbols[0] = s_this;

	/*
	post("array %p '%s'\n", class_array, class_array->name.us->name);
	post("o_emptyarray %p '%s'\n", slotRawObject(&o_emptyarray)->classptr, slotRawObject(&o_emptyarray)->classptr->name.us->name);
	post("o_argnamethis %p '%s'\n", slotRawObject(&o_argnamethis)->classptr, slotRawObject(&o_argnamethis)->classptr->name.us->name);
	post("o_onenilarray %p '%s'\n", slotRawObject(&o_onenilarray)->classptr, slotRawObject(&o_onenilarray)->classptr->name.us->name);
	dumpObjectSlot(&o_emptyarray);
	dumpObjectSlot(&o_argnamethis);
	dumpObjectSlot(&o_onenilarray);
	*/
}

PyrObject* instantiateObject(class PyrGC *gc, PyrClass* classobj, int size,
	bool fill, bool runGC)
{
	PyrObject *newobj, *proto;
	int numbytes, format, flags;

	format = slotRawInt(&classobj->instanceFormat);
	flags = slotRawInt(&classobj->instanceFlags);

	if (slotRawInt(&classobj->classFlags) & classHasIndexableInstances) {
		// create an indexable object
		numbytes = size * gFormatElemSize[format];
		newobj = gc->New(numbytes, flags, format, runGC);
		if (fill) {
			newobj->size = size;
			if (format == obj_slot) {
				nilSlots(newobj->slots, size);
			} else {
				memset(newobj->slots, format == obj_char ? ' ' : 0, size * gFormatElemSize[format]);
			}
		} else {
			newobj->size = 0;
		}
	} else {
		if (IsObj(&classobj->iprototype)) {
			proto = slotRawObject(&classobj->iprototype);
			size = proto->size;
			numbytes = size * sizeof(PyrSlot);
			newobj = gc->New(numbytes, flags, format, runGC);
			newobj->size = size;
			if (size) {
				memcpy(newobj->slots, proto->slots, numbytes);
			}
		} else {
			numbytes = 0;
			newobj = gc->New(numbytes, flags, format, runGC);
			newobj->size = 0;
		}
	}
	newobj->classptr = classobj;
	return newobj;
}

PyrObject* instantiateObjectLight(class PyrGC *gc, PyrClass* classobj, int size, bool runGC);
PyrObject* instantiateObjectLight(class PyrGC *gc, PyrClass* classobj, int size, bool runGC)
{
	PyrObject *newobj, *proto;
	int numbytes, format, flags;

	format = slotRawInt(&classobj->instanceFormat);
	flags = slotRawInt(&classobj->instanceFlags);

	if (slotRawInt(&classobj->classFlags) & classHasIndexableInstances) {
		numbytes = size * gFormatElemSize[format];
	} else {
		if (IsObj(&classobj->iprototype)) {
			proto = slotRawObject(&classobj->iprototype);
			size = proto->size;
			numbytes = size * sizeof(PyrSlot);
		} else {
			size = 0;
			numbytes = 0;
		}
	}
	newobj = gc->New(numbytes, flags, format, runGC);
	newobj->size = size;
	newobj->classptr = classobj;

	return newobj;
}

PyrObject* copyObject(class PyrGC *gc, PyrObject *inobj, bool runGC)
{
	PyrObject *newobj;

	// copies are neither immutable not permanent
	int flags = ~(obj_immutable) & inobj->obj_flags;
		flags = ~(obj_permanent) & flags;

	int elemsize = gFormatElemSize[inobj->obj_format];
	int numbytes = inobj->size * elemsize;

	newobj = gc->New(numbytes, flags, inobj->obj_format, runGC);

	newobj->size = inobj->size;
	newobj->classptr = inobj->classptr;

	memcpy(newobj->slots, inobj->slots, inobj->size * elemsize);
	return newobj;
}

PyrObject* copyObjectRange(class PyrGC *gc, PyrObject *inobj, int start, int end, bool runGC)
{
	PyrObject *newobj;

 	if (start < 0) start = 0;
 	if (end >= inobj->size) end = inobj->size - 1;
 	int length = end - start + 1;
 	if (length < 0) length = 0;

	int elemsize = gFormatElemSize[inobj->obj_format];
	int numbytes = length * elemsize;

	// copies are neither immutable not permanent
	int flags = ~(obj_immutable) & inobj->obj_flags;
		flags = ~(obj_permanent) & flags;

	newobj = gc->New(numbytes, flags, inobj->obj_format, runGC);
	newobj->size = length;
	newobj->classptr = inobj->classptr;

	if (length > 0) {
		memcpy(newobj->slots, (char*)(inobj->slots) + start * elemsize, length * elemsize);
	}
	return newobj;
}

void dumpObject(PyrObject *obj)
{
	char str[256];
	PyrClass *classobj;
	int i;

	if (obj == NULL) {
		postfl("NULL object pointer\n");
		return;
	}
	classobj = obj->classptr;
	if (isKindOf(obj, class_class)) {
		post("class %s (%p) {\n", slotRawSymbol(&((PyrClass*)obj)->name)->name, obj);
	} else {
		//post("Instance of %s (%p) {\n", slotRawSymbol(&classobj->name)->name, obj);
		post("Instance of %s {    (%p, gc=%02X, fmt=%02X, flg=%02X, set=%02X)\n",
			slotRawSymbol(&classobj->name)->name, obj, obj->gc_color, obj->obj_format, obj->obj_flags,
			obj->obj_sizeclass);
	}
        //flushPostBuf();

	if (obj->obj_format == obj_notindexed) {
		post("  instance variables [%d]\n", obj->size);
		for (i=0; i<obj->size; ++i) {
			slotString(obj->slots + i, str);
			post("    %s : %s\n", slotRawSymbolArray(&classobj->instVarNames)->symbols[i]->name, str);
		}
	} else {
		int maxsize;
		post("  indexed slots [%d]\n", obj->size);
		maxsize = sc_min(32, obj->size);
		switch (obj->obj_format) {
			case obj_slot :
				for (i=0; i<maxsize; ++i) {
					slotString(obj->slots + i, str);
					post("    %3d : %s\n", i, str);
				}
				break;
			case obj_double :
				for (i=0; i<maxsize; ++i) {
					post("    %3d : %f\n", i, slotRawFloat(&obj->slots[i]));
				}
				break;
			case obj_float :
				for (i=0; i<maxsize; ++i) {
					float val;
					val = ((float*)(obj->slots))[i];
					post("    %3d : %g\n", i, val);
				}
				break;
			case obj_int32 :
				for (i=0; i<maxsize; ++i) {
					int32 val;
					val = ((int32*)(obj->slots))[i];
					post("    %3d : %d\n", i, val);
				}
				break;
			case obj_int16 :
				for (i=0; i<maxsize; ++i) {
					int16 val;
					val = ((int16*)(obj->slots))[i];
					post("    %3d : %d\n", i, val);
				}
				break;
			case obj_int8 :
				for (i=0; i<maxsize; ++i) {
					int8 val;
					val = ((int8*)(obj->slots))[i];
					post("    %3d : %4d %4u 0x%02X\n", i, val, val&255, val&255);
				}
				break;
			case obj_char :
				for (i=0; i<maxsize; ++i) {
					char val;
					val = ((char*)(obj->slots))[i];
					post("    %3d : %c\n", i, val);
				}
				break;
			case obj_symbol :
				for (i=0; i<maxsize; ++i) {
					PyrSymbol* sym;
					sym = ((PyrSymbol**)(obj->slots))[i];
					post("    %3d : '%s'\n", i, sym->name);
				}
				break;
			default :
				post("unknown obj_format %X\n", obj->obj_format);
		}
		if (obj->size > maxsize) {
			post("    ...\n");
		}
	}
	post("}\n");
}

void dumpBadObject(PyrObject *obj)
{
	char str[128];
	PyrClass *classobj;
	int i;

	if (obj == NULL) {
		postfl("NULL object pointer\n");
		return;
	}
	classobj = obj->classptr;
	if (isKindOf(obj, class_class)) {
		postfl("class %s (%p) {\n", slotRawSymbol(&((PyrClass*)obj)->name)->name, obj);
	} else {
		//postfl("Instance of %s (%p) {\n", slotRawSymbol(&classobj->name)->name, obj);
		postfl("Instance of %s {    (%p, gc=%02X, fmt=%02X, flg=%02X, set=%02X)\n",
			slotRawSymbol(&classobj->name)->name, obj, obj->gc_color, obj->obj_format, obj->obj_flags,
			obj->obj_sizeclass);
	}
	if (obj->obj_format == obj_notindexed) {
		postfl("  instance variables [%d]\n", obj->size);
		for (i=0; i<obj->size; ++i) {
			slotString(obj->slots + i, str);
			postfl("    %s : %s\n", slotRawSymbolArray(&classobj->instVarNames)->symbols[i]->name, str);
		}
	} else {
		int maxsize;
		postfl("  indexed slots [%d]\n", obj->size);
		maxsize = obj->size;
		maxsize = sc_min(32, maxsize);
		switch (obj->obj_format) {
			case obj_slot :
				for (i=0; i<maxsize; ++i) {
					slotString(obj->slots + i, str);
					postfl("    %3d : %s\n", i, str);
				}
				break;
			case obj_double :
				for (i=0; i<maxsize; ++i) {
					postfl("    %3d : %f\n", i, slotRawFloat(&obj->slots[i]));
				}
				break;
			case obj_float :
				for (i=0; i<maxsize; ++i) {
					float val;
					val = ((float*)(obj->slots))[i];
					postfl("    %3d : %g\n", i, val);
				}
				break;
			case obj_int32 :
				for (i=0; i<maxsize; ++i) {
					int32 val;
					val = ((int32*)(obj->slots))[i];
					postfl("    %3d : %d\n", i, val);
				}
				break;
			case obj_int16 :
				for (i=0; i<maxsize; ++i) {
					int16 val;
					val = ((int16*)(obj->slots))[i];
					postfl("    %3d : %d\n", i, val);
				}
				break;
			case obj_int8 :
				for (i=0; i<maxsize; ++i) {
					int8 val;
					val = ((int8*)(obj->slots))[i];
					postfl("    %3d : %4d %4u 0x%02X\n", i, val, val&255, val&255);
				}
				break;
			case obj_char :
				for (i=0; i<maxsize; ++i) {
					char val;
					val = ((char*)(obj->slots))[i];
					postfl("    %3d : %c\n", i, val);
				}
				break;
			case obj_symbol :
				for (i=0; i<maxsize; ++i) {
					PyrSymbol* sym;
					sym = ((PyrSymbol**)(obj->slots))[i];
					post("    %3d : '%s'\n", i, sym->name);
				}
				break;
			default :
				postfl("unknown obj_format %X\n", obj->obj_format);
		}
		if (obj->size > maxsize) {
			postfl("    ...\n");
		}
	}
	postfl("}\n");
}

void dumpObjectSlot(PyrSlot *slot)
{
	if (IsObj(slot)) {
		dumpObject(slotRawObject(slot));
	} else {
		dumpPyrSlot(slot);
	}
}

void dumpSlotOneWord(const char *tagstr, PyrSlot *slot)
{
	char str[256];
	slotOneWord(slot, str);
	post("%s %s\n", tagstr, str);
}

void CallStackSanity(VMGlobals *g, const char *tagstr);
void CallStackSanity(VMGlobals *g, const char *tagstr)
{
	PyrFrame *frame;
	frame = g->frame;
	while (frame) {
		if (FrameSanity(frame, tagstr)) {
			DumpBackTrace(g);
			//Debugger();
			break;
		}
		frame = slotRawFrame(&frame->caller);
	}
}

bool FrameSanity(PyrFrame *frame, const char *tagstr);
bool FrameSanity(PyrFrame *frame, const char *tagstr)
{
	bool failed = false;
	if (frame==NULL) return false;
	if (NotObj(&frame->method)) {
		postfl("Frame %p method tag wrong %p\n", frame, GetTag(&frame->method));
		failed = true;
	//} else if (!isKindOf((PyrObject*)slotRawObject(&frame->method)->classptr, class_fundef)) {
	} else if (slotRawObject(&frame->method)->classptr != class_method && slotRawObject(&frame->method)->classptr != class_fundef) {
		postfl("Frame %p method class wrong %p\n", frame, slotRawObject(&frame->method)->classptr);
		failed = true;
		//if (slotRawObject(&frame->method)->classptr->classptr == class_class) {
		postfl("class: '%s'\n", slotRawSymbol(&slotRawObject(&frame->method)->classptr->name)->name);
		///} else {
		//	postfl("not even a class\n");
		//}
	} else if (NotObj(&slotRawBlock(&frame->method)->code)) {
		postfl("Method %p code tag wrong %p\n", slotRawBlock(&frame->method), GetTag(&slotRawBlock(&frame->method)->code));
		failed = true;
	} else if (slotRawObject(&slotRawBlock(&frame->method)->code)->classptr != class_int8array) {
		postfl("Code %p class wrong %p\n", slotRawObject(&slotRawBlock(&frame->method)->code), slotRawObject(&slotRawBlock(&frame->method)->code)->classptr);
			postfl("class: '%s'\n", slotRawSymbol(&slotRawObject(&slotRawBlock(&frame->method)->code)->classptr->name)->name);
		failed = true;
	}
	/*
	if (frame->caller.utag != tagHFrame && frame->caller.utag != tagNil) {
		postfl("Frame %p caller tag wrong %p\n", frame, frame->caller.utag);
		failed = true;
	}
	if (frame->context.utag != tagHFrame && frame->context.utag != tagNil) {
		postfl("Frame %p context tag wrong %p\n", frame, frame->context.utag);
		failed = true;
	}
	if (frame->homeContext.utag != tagHFrame && frame->homeContext.utag != tagNil) {
		postfl("Frame %p homeContext tag wrong %p\n", frame, frame->homeContext.utag);
		failed = true;
	}
	*/
	if (!IsPtr(&frame->ip)) {
		postfl("Frame %p ip tag wrong %p\n", frame, GetTag(&frame->ip));
		failed = true;
	}
	return failed;
}

void DumpFrame(PyrFrame *frame)
{
	char str[256];
	int i, numargs;
	PyrMethod *meth;
	PyrMethodRaw *methraw;

	if (FrameSanity(frame, "DumpFrame")) {
		post("FRAME CORRUPTED\n");
		return;
	}
	slotOneWord(&frame->method, str);
	//slotString(&frame->method, str);

	meth = slotRawMethod(&frame->method);
	methraw = METHRAW(meth);
	if (methraw->numtemps) {
		post("\t%s   %p\n", str, frame);
		numargs = methraw->numargs + methraw->varargs;
		for (i=0; i<methraw->numtemps; ++i) {
			slotOneWord(frame->vars + i, str);
			//slotString(frame->vars + i, str);
			if (i < numargs) {
				post("\t\targ %s = %s\n", slotRawSymbolArray(&meth->argNames)->symbols[i]->name, str);
			} else {
				post("\t\tvar %s = %s\n", slotRawSymbolArray(&meth->varNames)->symbols[i - numargs]->name, str);
			}
		}
	} else {
		post("\t%s  (no arguments or variables)\n", str);
	}
}

void dumpByteCodes(PyrBlock *theBlock);

void DumpDetailedFrame(PyrFrame *frame);
void DumpDetailedFrame(PyrFrame *frame)
{
	char mstr[256];
	char str[256];
	int i, numargs;
	PyrMethod *meth;
	PyrMethodRaw *methraw;

	if (FrameSanity(frame, "DumpDetailedFrame")) {
		post("FRAME CORRUPTED\n");
		return;
	}
	slotOneWord(&frame->method, mstr);
	//slotString(&frame->method, str);

	meth = slotRawMethod(&frame->method);
	methraw = METHRAW(meth);

	if (methraw->numtemps) {
		post("\t%s\n", mstr);
		numargs = methraw->numargs + methraw->varargs;
		for (i=0; i<methraw->numtemps; ++i) {
			slotOneWord(frame->vars + i, str);
			//slotString(frame->vars + i, str);
			if (i < numargs) {
				post("\t\targ %s = %s\n", slotRawSymbolArray(&meth->argNames)->symbols[i]->name, str);
			} else {
				post("\t\tvar %s = %s\n", slotRawSymbolArray(&meth->varNames)->symbols[i - numargs]->name, str);
			}
		}
	} else {
		post("\t%s  (no arguments or variables)\n", mstr);
	}

	post("\t....%s details:\n", mstr);
	post("\t\tneedsHeapContext  = %d\n", methraw->needsHeapContext);
	post("\t\tnumtemps  = %d\n", methraw->numtemps);
	post("\t\tpopSize  = %d\n", methraw->popSize);

	slotString(&frame->method, str);		post("\t\tmethod  = %s\n", str);
	slotString(&frame->caller, str);		post("\t\tcaller  = %s\n", str);
	slotString(&frame->context, str);		post("\t\tcontext = %s\n", str);
	slotString(&frame->homeContext, str);	post("\t\thomeCtx = %s\n", str);
	slotString(&frame->ip, str);			post("\t\tip      = %s\n", str);

	if (IsPtr(&frame->ip)) {
		post("ipoffset = %d\n", (char*)slotRawPtr(&frame->ip) - (char*)slotRawInt8Array(&meth->code)->b);
		dumpByteCodes(meth);
	}

}


bool respondsTo(PyrSlot *slot, PyrSymbol *selector)
{
	PyrClass *classobj;
	PyrMethod *meth;
	int index;

	classobj = classOfSlot(slot);

	index = slotRawInt(&classobj->classIndex) + selector->u.index;
	meth = gRowTable[index];
	return slotRawSymbol(&meth->name) == selector;
}

PyrMethod* methodLookup(PyrSlot *slot, PyrSymbol *selector);
PyrMethod* methodLookup(PyrSlot *slot, PyrSymbol *selector)
{
	PyrClass *classobj;
	PyrMethod *meth;
	int index;

	classobj = classOfSlot(slot);

	index = slotRawInt(&classobj->classIndex) + selector->u.index;
	meth = gRowTable[index];
	return meth;
}


bool isSubclassOf(PyrClass *classobj, PyrClass *testclass)
{
	while (classobj) {
		if (classobj == testclass) {
			return true;
		}
		classobj = slotRawSymbol(&classobj->superclass)->u.classobj;
	}
	return false;
}

/*bool isKindOf(PyrObjectHdr *obj, PyrClass *testclass)
{
	int objClassIndex = slotRawInt(&obj->classptr->classIndex);
	return objClassIndex >= slotRawInt(&testclass->classIndex) && objClassIndex <= slotRawInt(&testclass->maxSubclassIndex);
}*/

bool objAddIndexedSlot(PyrObject *obj, PyrSlot *slot)
{
	if (obj->size < ARRAYMAXINDEXSIZE(obj)) {
		slotCopy(&obj->slots[obj->size++], slot);
		return true;
	} else {
		return false;
	}
}

bool objAddIndexedSymbol(PyrSymbolArray *obj, PyrSymbol *symbol)
{
	if (obj->size < MAXINDEXSIZE((PyrObject*)obj)) {
		obj->symbols[obj->size++] = symbol;
		return true;
	} else {
		return false;
	}
}

bool objAddIndexedObject(PyrObject *obj, PyrObject *obj2)
{
	if (obj->size < ARRAYMAXINDEXSIZE(obj)) {
		SetObject(obj->slots + obj->size, obj2);
		obj->size++;
		return true;
	} else {
		return false;
	}
}

void fillSlots(PyrSlot* slot, int size, PyrSlot* fillslot)
{
	for (int i = 0; i != size; ++i)
		slotCopy(&slot[i], fillslot);
}

void nilSlots(PyrSlot* slot, int size)
{
	fillSlots(slot, size, &o_nil);
}

void zeroSlots(PyrSlot* slot, int size)
{
	PyrSlot zero;
	SetTagRaw(&zero, 0);
	SetRaw(&zero, 0.0);
	fillSlots(slot, size, &zero);
}

PyrObject* newPyrObject(class PyrGC *gc, size_t inNumBytes, int inFlags, int inFormat, bool inRunGC)
{
	return gc->New(inNumBytes, inFlags, inFormat, inRunGC);
}

PyrObject* newPyrArray(class PyrGC *gc, int size, int flags, bool runGC)
{
	PyrObject* array;

	int numbytes = size * sizeof(PyrSlot);
	if (!gc)
		array = PyrGC::NewPermanent(numbytes, flags, obj_slot);
	else
		array = gc->New(numbytes, flags, obj_slot, runGC);
	array->classptr = class_array;
	return array;
}

PyrSymbolArray* newPyrSymbolArray(class PyrGC *gc, int size, int flags, bool runGC)
{
	PyrSymbolArray* array;

	int numbytes = size * sizeof(PyrSymbol*);
	if (!gc) array = (PyrSymbolArray*)PyrGC::NewPermanent(numbytes, flags, obj_symbol);
	else array = (PyrSymbolArray*)gc->New(numbytes, flags, obj_symbol, runGC);
	array->classptr = class_symbolarray;
	return array;
}

PyrInt8Array* newPyrInt8Array(class PyrGC *gc, int size, int flags, bool runGC)
{
	PyrInt8Array* array;

	if (!gc) array = (PyrInt8Array*)PyrGC::NewPermanent(size, flags, obj_int8);
	else array = (PyrInt8Array*)gc->New(size, flags, obj_int8, runGC);
	array->classptr = class_int8array;
	return array;
}

PyrInt32Array* newPyrInt32Array(class PyrGC *gc, int size, int flags, bool runGC)
{
	PyrInt32Array* array;
	int numbytes = size * sizeof(int32);
	if (!gc) array = (PyrInt32Array*)PyrGC::NewPermanent(numbytes, flags, obj_int32);
	else array = (PyrInt32Array*)gc->New(numbytes, flags, obj_int32, runGC);
	array->classptr = class_int32array;
	return array;
}

PyrDoubleArray* newPyrDoubleArray(class PyrGC *gc, int size, int flags, bool runGC)
{
	PyrDoubleArray* array;

	int numbytes = size * sizeof(double);
	if (!gc) array = (PyrDoubleArray*)PyrGC::NewPermanent(numbytes, flags, obj_double);
	else array = (PyrDoubleArray*)gc->New(size, flags, obj_double, runGC);
	array->classptr = class_doublearray;
	return array;
}

PyrString* newPyrString(class PyrGC *gc, const char *s, int flags, bool runGC)
{
	PyrString* string;
	int length = strlen(s);

	if (!gc) string = (PyrString*)PyrGC::NewPermanent(length, flags, obj_char);
	else string = (PyrString*)gc->New(length, flags, obj_char, runGC);
	string->classptr = class_string;
	string->size = length;
	memcpy(string->s, s, length);
	return string;
}

PyrString* newPyrStringN(class PyrGC *gc, int length, int flags, bool runGC)
{
	PyrString* string;

	if (!gc) string = (PyrString*)PyrGC::NewPermanent(length, flags, obj_char);
	else string = (PyrString*)gc->New(length, flags, obj_char, runGC);
	string->classptr = class_string;
	string->size = length; // filled with garbage!
	return string;
}

PyrBlock* newPyrBlock(int flags)
{
	PyrBlock* block;
	PyrMethodRaw *methraw;


	int32 numbytes = sizeof(PyrBlock) - sizeof(PyrObjectHdr);
	int32 numSlots = numbytes / sizeof(PyrSlot);

	if (!compilingCmdLine) block = (PyrBlock*)PyrGC::NewPermanent(numbytes, flags, obj_notindexed);
	else block = (PyrBlock*)gMainVMGlobals->gc->New(numbytes, flags, obj_notindexed, false);
	block->classptr = class_fundef;
	block->size = numSlots;

	// clear out raw area
	methraw = METHRAW(block);
	methraw->specialIndex = 0;
	methraw->methType = methBlock;
	methraw->needsHeapContext = 0;
	methraw->frameSize = 0;
	methraw->varargs = 0;
	methraw->numargs = 0;
	methraw->numvars = 0;
	methraw->numtemps = 0;
	methraw->popSize = 0;

	nilSlots(&block->rawData1,  numSlots);
	return block;
}

SCLANG_DLLEXPORT_C struct VMGlobals* scGlobals()
{
	return gMainVMGlobals;
}

PyrMethod* initPyrMethod(PyrMethod* method)
{

	int32 numbytes = sizeof(PyrMethod) - sizeof(PyrObjectHdr);
	int32 numSlots = numbytes / sizeof(PyrSlot);

	method->classptr = class_method;
	method->size = 0;
	method->size = numSlots;
	SetFloat(&method->rawData1, 0.0);
	SetFloat(&method->rawData2, 0.0);
	nilSlots(&method->code,  numSlots-2);
	//slotCopy(&method->byteMeter, &o_zero);
	//slotCopy(&method->callMeter, &o_zero);
	//post("<- newPyrMethod %p %p\n", method, methraw);
	return method;
}

PyrMethod* newPyrMethod()
{
	int32 numbytes = sizeof(PyrMethod) - sizeof(PyrObjectHdr);
	PyrMethod* method = (PyrMethod*)PyrGC::NewPermanent(numbytes, obj_permanent | obj_immutable, obj_notindexed);
	return initPyrMethod(method);
}

void freePyrSlot(PyrSlot *slot)
{
	if (IsObj(slot)) {
		PyrObject *obj = slotRawObject(slot);

		if (obj && obj->IsPermanent()) {
			// don't deallocate these
			if (obj != slotRawObject(&o_emptyarray) && obj != slotRawObject(&o_onenilarray) && obj != slotRawObject(&o_argnamethis))
				pyr_pool_runtime->Free((void*)obj);

			SetNil(slot);
		}
	}
}

void freePyrObject(PyrObject *obj)
{
	if (obj->IsPermanent()) {
		pyr_pool_runtime->Free((void*)obj);
	}
}

int getIndexedInt(PyrObject *obj, int index, int *value)
{
	PyrSlot *slot;
	int err = errNone;
	if (index < 0 || index >= obj->size) return errIndexOutOfRange;
	switch (obj->obj_format) {
		case obj_slot :
			slot = obj->slots + index;
			if (IsFloat(slot)) {
				*value = (int)slotRawFloat(slot);
			} else if (IsInt(slot)) {
				*value = slotRawInt(slot);
			} else {
				err = errWrongType;
			}
			break;
		case obj_double :
			*value = (int)((double*)(obj->slots))[index];
			break;
		case obj_float :
			*value = (int)((float*)(obj->slots))[index];
			break;
		case obj_int32 :
			*value = ((int32*)(obj->slots))[index];
			break;
		case obj_int16 :
			*value = ((int16*)(obj->slots))[index];
			break;
		case obj_int8 :
			*value = ((int8*)(obj->slots))[index];
			break;
		default :
			err = errWrongType;
	}
	return err;
}

int getIndexedFloat(PyrObject *obj, int index, float *value)
{
	PyrSlot *slot;
	int err = errNone;
	if (index < 0 || index >= obj->size) return errIndexOutOfRange;
	switch (obj->obj_format) {
		case obj_slot :
			slot = obj->slots + index;
			if (IsFloat(slot)) {
				*value = slotRawFloat(slot);
			} else if (IsInt(slot)) {
				*value = slotRawInt(slot);
			} else {
				err = errWrongType;
			}
			break;
		case obj_double :
			*value = ((double*)(obj->slots))[index];
			break;
		case obj_float :
			*value = ((float*)(obj->slots))[index];
			break;
		case obj_int32 :
			*value = ((int32*)(obj->slots))[index];
			break;
		case obj_int16 :
			*value = ((int16*)(obj->slots))[index];
			break;
		case obj_int8 :
			*value = ((int8*)(obj->slots))[index];
			break;
		default :
			err = errWrongType;
	}
	return err;
}

int getIndexedDouble(PyrObject *obj, int index, double *value)
{
	PyrSlot *slot;
	int err = errNone;
	if (index < 0 || index >= obj->size) return errIndexOutOfRange;
	switch (obj->obj_format) {
		case obj_slot :
			slot = obj->slots + index;
			if (IsFloat(slot)) {
				*value = slotRawFloat(slot);
			} else if (IsInt(slot)) {
				*value = slotRawInt(slot);
			} else {
				err = errWrongType;
			}
			break;
		case obj_double :
			*value = ((double*)(obj->slots))[index];
			break;
		case obj_float :
			*value = ((float*)(obj->slots))[index];
			break;
		case obj_int32 :
			*value = ((int32*)(obj->slots))[index];
			break;
		case obj_int16 :
			*value = ((int16*)(obj->slots))[index];
			break;
		case obj_int8 :
			*value = ((int8*)(obj->slots))[index];
			break;
		default :
			err = errWrongType;
	}
	return err;
}


void getIndexedSlot(PyrObject *obj, PyrSlot *a, int index)
{
//	postfl("getIndexedSlot %s %X %d\n", slotRawSymbol(&obj->classptr->name)->name,
//		obj, index);
	switch (obj->obj_format) {
		case obj_slot :
			slotCopy(a, &obj->slots[index]);
			break;
		case obj_double :
			SetFloat(a, ((double*)(obj->slots))[index]);
			break;
		case obj_float :
			SetFloat(a, ((float*)(obj->slots))[index]);
			break;
		case obj_int32 :
			SetInt(a, ((int32*)(obj->slots))[index]);
			break;
		case obj_int16 :
			SetInt(a, ((int16*)(obj->slots))[index]);
			break;
		case obj_int8 :
			SetInt(a, ((int8*)(obj->slots))[index]);
			break;
		case obj_symbol :
			SetSymbol(a, (PyrSymbol*)((int**)(obj->slots))[index]);
			break;
		case obj_char :
			SetChar(a, ((unsigned char*)(obj->slots))[index]);
			break;
	}
}

int putIndexedSlot(VMGlobals *g, PyrObject *obj, PyrSlot *c, int index)
{
	PyrSlot *slot;
	switch (obj->obj_format) {
		case obj_slot :
			if (obj->IsImmutable()) return errImmutableObject;
			slot = obj->slots + index;
			slotCopy(slot, c);
			g->gc->GCWrite(obj, slot);
			break;
		case obj_double :
			if (NotFloat(c)) {
				if (NotInt(c)) return errWrongType;
				else {
					((double*)(obj->slots))[index] = slotRawInt(c);
				}
			} else
				((double*)(obj->slots))[index] = slotRawFloat(c);
			break;
		case obj_float :
			if (NotFloat(c)) {
				if (NotInt(c)) return errWrongType;
				else {
					((float*)(obj->slots))[index] = slotRawInt(c);
				}
			} else
				((float*)(obj->slots))[index] = slotRawFloat(c);
			break;
		case obj_int32 :
			if (NotInt(c)) return errWrongType;
			((int32*)(obj->slots))[index] = slotRawInt(c);
			break;
		case obj_int16 :
			if (NotInt(c)) return errWrongType;
			((int16*)(obj->slots))[index] = slotRawInt(c);
			break;
		case obj_int8 :
			if (NotInt(c)) return errWrongType;
			((int8*)(obj->slots))[index] = slotRawInt(c);
			break;
		case obj_symbol :
			if (NotSym(c)) return errWrongType;
			((PyrSymbol**)(obj->slots))[index] = slotRawSymbol(c);
			break;
		case obj_char :
			if (NotChar(c)) return errWrongType;
			((unsigned char*)(obj->slots))[index] = slotRawChar(c);
			break;
	}
	return errNone;
}

int putIndexedFloat(PyrObject *obj, double val, int index)
{
	PyrSlot *slot;
	switch (obj->obj_format) {
		case obj_slot :
			if (obj->IsImmutable()) return errImmutableObject;
			slot = obj->slots + index;
			SetFloat(slot, val);
			break;
		case obj_double :
			((double*)(obj->slots))[index] = val;
			break;
		case obj_float :
			((float*)(obj->slots))[index] = (float)val;
			break;
		case obj_int32 :
			((int32*)(obj->slots))[index] = (int32)val;
			break;
		case obj_int16 :
			((int16*)(obj->slots))[index] = (int16)val;
			break;
		case obj_int8 :
			((int8*)(obj->slots))[index] = (int8)val;
			break;
	}
	return errNone;
}

static int hashPtr(void* ptr)
{
    int32 hashed_part = int32((size_t)ptr&0xffffffff);
    return Hash(hashed_part);
}

int calcHash(PyrSlot *a);
int calcHash(PyrSlot *a)
{
	int hash;
	switch (GetTag(a)) {
	case tagObj : hash = hashPtr(slotRawObject(a)); break;
	case tagInt : hash = Hash(slotRawInt(a)); break;
	case tagChar : hash = Hash(slotRawChar(a) & 255); break;
	case tagSym : hash = slotRawSymbol(a)->hash; break;
	case tagNil : hash = 0xA5A5A5A5; break;
	case tagFalse : hash = 0x55AA55AA; break;
	case tagTrue : hash = 0x69696969; break;
	case tagPtr : hash = hashPtr(slotRawPtr(a)); break;
	default :
		// hash for a double
		union {
			int32 i[2];
			double d;
		} u;
		u.d = slotRawFloat(a);
		hash = Hash(u.i[0] + Hash(u.i[1]));
	}
	return hash;
}

void InstallFinalizer(VMGlobals* g, PyrObject *inObj, int slotIndex, ObjFuncPtr inFunc)
{
	PyrObject *finalizer = g->gc->NewFinalizer(inFunc, inObj, false);
	SetObject(inObj->slots + slotIndex, finalizer);
	g->gc->GCWriteNew(inObj, finalizer); // we know finalizer is white so we can use GCWriteNew
}