Merge branch 'master' into startup

basis/help/tutorial/tutorial.factor

@@ -33,7 +33,7 @@ ARTICLE: "first-program-logic" "Writing some logic in your first program"
 $nl
 "In order to be able to call the words defined in the " { $snippet "palindrome" } " vocabulary, you need to issue the following command in the listener:"
 { $code "USE: palindrome" }
-"Now, we will be making some additions to the file. Since the file was loaded by the scaffold tool in the previous step, you need to tell Factor to reload it if it changes. Factor has a handy feature for this; pressing " { $command tool "common" refresh-all } " in the listener window will reload any changed source files. You can also force a single vocabulary to reload:"
+"Now, we will be making some additions to the file. Since the file was loaded by the scaffold tool in the previous step, you need to tell Factor to reload it if it changes. Factor has a handy feature for this; pressing " { $command tool "common" refresh-all } " in the listener window will reload any changed source files. You can also force a single vocabulary to reload, in case the refresh feature does not pick up changes from disk:"
 { $code "\"palindrome\" reload" }
 "We will now write our first word using " { $link POSTPONE: : } ". This word will test if a string is a palindrome; it will take a string as input, and give back a boolean as output. We will call this word " { $snippet "palindrome?" } ", following a naming convention that words returning booleans have names ending with " { $snippet "?" } "."
 $nl

basis/ui/gadgets/editors/editors-tests.factor

@@ -1,8 +1,8 @@
-USING: accessors ui.gadgets.editors tools.test kernel io
+USING: accessors ui.gadgets.editors ui.gadgets.editors.private
-io.streams.plain definitions namespaces ui.gadgets
+tools.test kernel io io.streams.plain definitions namespaces
-ui.gadgets.grids prettyprint documents ui.gestures ui.gadgets.debug
+ui.gadgets ui.gadgets.grids prettyprint documents ui.gestures
-models documents.elements ui.gadgets.scrollers ui.gadgets.line-support
+ui.gadgets.debug models documents.elements ui.gadgets.scrollers
-sequences ;
+ui.gadgets.line-support sequences ;
 IN: ui.gadgets.editors.tests
 
 [ "foo bar" ] [
@@ -55,6 +55,9 @@ IN: ui.gadgets.editors.tests
 [ ] [ <editor> com-join-lines ] unit-test
 [ ] [ <editor> "A" over set-editor-string com-join-lines ] unit-test
 [ "A B" ] [ <editor> "A\nB" over set-editor-string [ com-join-lines ] [ editor-string ] bi ] unit-test
+[ "A B\nC\nD" ] [ <editor> "A\nB\nC\nD" over set-editor-string { 0 0 } over set-caret dup mark>caret [ com-join-lines ] [ editor-string ] bi ] unit-test
+[ "A\nB C\nD" ] [ <editor> "A\nB\nC\nD" over set-editor-string { 1 0 } over set-caret dup mark>caret [ com-join-lines ] [ editor-string ] bi ] unit-test
+[ "A\nB\nC D" ] [ <editor> "A\nB\nC\nD" over set-editor-string { 2 0 } over set-caret dup mark>caret [ com-join-lines ] [ editor-string ] bi ] unit-test
 
 [ 2 ] [ <editor> 20 >>min-rows 20 >>min-cols pref-viewport-dim length ] unit-test
 

basis/ui/gadgets/editors/editors.factor

@@ -17,6 +17,8 @@ caret-color
 caret mark
 focused? blink blink-alarm ;
 
+<PRIVATE
+
 : <loc> ( -- loc ) { 0 0 } <model> ;
 
 : init-editor-locs ( editor -- editor )
@@ -27,6 +29,8 @@ focused? blink blink-alarm ;
     COLOR: red >>caret-color
     monospace-font >>font ; inline
 
+PRIVATE>
+
 : new-editor ( class -- editor )
     new-line-gadget
         <document> >>model
@@ -36,6 +40,8 @@ focused? blink blink-alarm ;
 : <editor> ( -- editor )
     editor new-editor ;
 
+<PRIVATE
+
 : activate-editor-model ( editor model -- )
     [ add-connection ]
     [ nip activate-model ]
@@ -70,6 +76,8 @@ SYMBOL: blink-interval
         bi
     ] [ drop ] if ;
 
+PRIVATE>
+
 M: editor graft*
     [ dup caret>> activate-editor-model ]
     [ dup mark>> activate-editor-model ] bi ;
@@ -142,6 +150,8 @@ M: editor ungraft*
         ] keep scroll>rect
     ] [ drop ] if ;
 
+<PRIVATE
+
 : draw-caret? ( editor -- ? )
     { [ focused?>> ] [ blink>> ] } 1&& ;
 
@@ -189,6 +199,8 @@ TUPLE: selected-line start end first? last? ;
         ] 3bi
     ] if ;
 
+PRIVATE>
+
 M: editor draw-line ( line index editor -- )
     [ selected-lines get at ] dip over
     [ draw-selected-line ] [ nip draw-unselected-line ] if ;
@@ -206,6 +218,8 @@ M: editor baseline font>> font-metrics ascent>> ;
 
 M: editor cap-height font>> font-metrics cap-height>> ;
 
+<PRIVATE
+
 : contents-changed ( model editor -- )
     [ [ nip caret>> ] [ drop ] 2bi '[ _ validate-loc ] (change-model) ]
     [ [ nip mark>> ] [ drop ] 2bi '[ _ validate-loc ] (change-model) ]
@@ -214,6 +228,8 @@ M: editor cap-height font>> font-metrics cap-height>> ;
 : caret/mark-changed ( editor -- )
     [ restart-blinking ] keep scroll>caret ;
 
+PRIVATE>
+
 M: editor model-changed
     {
         { [ 2dup model>> eq? ] [ contents-changed ] }
@@ -513,6 +529,8 @@ PRIVATE>
 : change-selection ( editor quot -- )
     '[ gadget-selection @ ] [ user-input* drop ] bi ; inline
 
+<PRIVATE
+
 : join-lines ( string -- string' )
     "\n" split
     [ rest-slice [ [ blank? ] trim-head-slice ] change-each ]
@@ -520,22 +538,39 @@ PRIVATE>
     [ " " join ]
     tri ;
 
-: this-line-and-next ( document line -- start end )
-    [ nip 0 swap 2array ]
-    [ 1 + [ nip ] [ swap doc-line length ] 2bi 2array ]
-    2bi ;
-
 : last-line? ( document line -- ? )
     [ last-line# ] dip = ;
 
+: prev-line-and-this ( document line -- start end )
+    swap
+    [ drop 1 - 0 2array ]
+    [ [ drop ] [ doc-line length ] 2bi 2array ]
+    2bi ;
+
+: join-with-prev ( document line -- )
+    [ prev-line-and-this ] [ drop ] 2bi
+    [ join-lines ] change-doc-range ;
+
+: this-line-and-next ( document line -- start end )
+    swap
+    [ drop 0 2array ]
+    [ [ 1 + ] dip [ drop ] [ doc-line length ] 2bi 2array ]
+    2bi ;
+
+: join-with-next ( document line -- )
+    [ this-line-and-next ] [ drop ] 2bi
+    [ join-lines ] change-doc-range ;
+
+PRIVATE>
+
 : com-join-lines ( editor -- )
     dup gadget-selection?
     [ [ join-lines ] change-selection ] [
-        [ model>> ] [ editor-caret first ] bi
+        [ model>> ] [ editor-caret first ] bi {
-        2dup last-line? [ 2drop ] [
+            { [ over last-line# 0 = ] [ 2drop ] }
-            [ this-line-and-next ] [ drop ] 2bi
+            { [ 2dup last-line? ] [ join-with-prev ] }
-            [ join-lines ] change-doc-range
+            [ join-with-next ]
-        ] if
+        } cond
     ] if ;
 
 multiline-editor "multiline" f {
@@ -566,6 +601,8 @@ TUPLE: source-editor < multiline-editor ;
 ! Fields wrap an editor
 TUPLE: field < border editor min-cols max-cols ;
 
+<PRIVATE
+
 : field-theme ( gadget -- gadget )
     { 2 2 } >>size
     { 1 0 } >>fill
@@ -576,6 +613,8 @@ TUPLE: field < border editor min-cols max-cols ;
         { 1 0 } >>fill
         field-theme ;
 
+PRIVATE>
+
 : new-field ( class -- gadget )
     [ <editor> ] dip new-border
         dup gadget-child >>editor

core/generic/single/single-tests.factor

@@ -4,7 +4,8 @@ accessors words byte-arrays bit-arrays parser namespaces make
 quotations stack-checker vectors growable hashtables sbufs
 prettyprint byte-vectors bit-vectors specialized-vectors
 definitions generic sets graphs assocs grouping see eval ;
-SPECIALIZED-VECTOR: double
+QUALIFIED-WITH: alien.c-types c
+SPECIALIZED-VECTOR: c:double
 IN: generic.single.tests
 
 GENERIC: lo-tag-test ( obj -- obj' )

extra/cpu/8080/emulator/emulator.factor

@@ -24,7 +24,6 @@ USING:
     quotations
     sequences
     sequences.deep
-    syntax
     words
 ;
 IN: cpu.8080.emulator

extra/space-invaders/space-invaders.factor

@@ -22,15 +22,13 @@ USING:
     ui.gadgets
     ui.gestures
     ui.render
+    specialized-arrays
 ;
 QUALIFIED: threads
 QUALIFIED: system
+SPECIALIZED-ARRAY: uchar
 IN: space-invaders
 
-<< 
-    "uchar" require-c-array 
->>
-
 TUPLE: space-invaders < cpu port1 port2i port2o port3o port4lo port4hi port5o bitmap sounds looping? ;
 CONSTANT: game-width 224
 CONSTANT: game-height 256

vm/debug.cpp

@@ -296,7 +296,7 @@ void factor_vm::dump_code_heap()
 		const char *status;
 		if(scan->type() == FREE_BLOCK_TYPE)
 			status = "free";
-		else if(scan->marked_p())
+		else if(code->state->is_marked_p(scan))
 		{
 			reloc_size += object_size(((code_block *)scan)->relocation);
 			literal_size += object_size(((code_block *)scan)->literals);

vm/full_collector.cpp

@@ -134,6 +134,8 @@ void factor_vm::collect_full_impl(bool trace_contexts_p)
 {
 	full_collector collector(this);
 
+	code->state->clear_mark_bits();
+
 	collector.trace_roots();
         if(trace_contexts_p)
 	{
@@ -148,16 +150,6 @@ void factor_vm::collect_full_impl(bool trace_contexts_p)
 	nursery.here = nursery.start;
 }
 
-/* In both cases, compact code heap before updating code blocks so that
-XTs are correct after */
-
-void factor_vm::big_code_heap_update()
-{
-	big_code_heap_updater updater(this);
-	code->free_unmarked(updater);
-	code->clear_remembered_set();
-}
-
 void factor_vm::collect_growing_heap(cell requested_bytes,
 	bool trace_contexts_p,
 	bool compact_code_heap_p)
@@ -168,15 +160,18 @@ void factor_vm::collect_growing_heap(cell requested_bytes,
 	collect_full_impl(trace_contexts_p);
 	delete old;
 
-	if(compact_code_heap_p) compact_code_heap(trace_contexts_p);
+	if(compact_code_heap_p)
+	{
+		compact_code_heap(trace_contexts_p);
+		big_code_heap_updater updater(this);
+		iterate_code_heap(updater);
+	}
+	else
+	{
+		big_code_heap_updater updater(this);
+		code->free_unmarked(updater);
+	}
 
-	big_code_heap_update();
-}
-
-void factor_vm::small_code_heap_update()
-{
-	small_code_heap_updater updater(this);
-	code->free_unmarked(updater);
 	code->clear_remembered_set();
 }
 
@@ -190,10 +185,16 @@ void factor_vm::collect_full(bool trace_contexts_p, bool compact_code_heap_p)
 	if(compact_code_heap_p)
 	{
 		compact_code_heap(trace_contexts_p);
-		big_code_heap_update();
+		big_code_heap_updater updater(this);
+		iterate_code_heap(updater);
 	}
 	else
-		small_code_heap_update();
+	{
+		small_code_heap_updater updater(this);
+		code->free_unmarked(updater);
+	}
+
+	code->clear_remembered_set();
 }
 
 }

vm/gc.cpp

@@ -54,9 +54,6 @@ void factor_vm::gc(gc_op op,
 			current_gc->op = collect_full_op;
 			break;
 		case collect_full_op:
-			/* Since we start tracing again, any previously
-			marked code blocks must be re-marked and re-traced */
-			code->clear_mark_bits();
 			current_gc->op = collect_growing_heap_op;
 			break;
 		default:

vm/heap.cpp

@@ -16,9 +16,18 @@ heap::heap(bool secure_gc_, cell size, bool executable_p) : secure_gc(secure_gc_
 	if(size > (1L << (sizeof(cell) * 8 - 6))) fatal_error("Heap too large",size);
 	seg = new segment(align_page(size),executable_p);
 	if(!seg) fatal_error("Out of memory in heap allocator",size);
+	state = new mark_bits<heap_block,block_size_increment>(seg->start,size);
 	clear_free_list();
 }
 
+heap::~heap()
+{
+	delete seg;
+	seg = NULL;
+	delete state;
+	state = NULL;
+}
+
 void heap::add_to_free_list(free_heap_block *block)
 {
 	if(block->size() < free_list_count * block_size_increment)
@@ -34,52 +43,15 @@ void heap::add_to_free_list(free_heap_block *block)
 	}
 }
 
-/* Called after reading the code heap from the image file, and after code GC.
+/* Called after reading the code heap from the image file, and after code heap
-
+compaction. Makes a free list consisting of one free block, at the very end. */
-In the former case, we must add a large free block from compiling.base + size to
-compiling.limit. */
 void heap::build_free_list(cell size)
 {
-	heap_block *prev = NULL;
-
 	clear_free_list();
-
-	size = (size + block_size_increment - 1) & ~(block_size_increment - 1);
-
-	heap_block *scan = first_block();
 	free_heap_block *end = (free_heap_block *)(seg->start + size);
-
+	end->set_type(FREE_BLOCK_TYPE);
-	/* Add all free blocks to the free list */
+	end->set_size(seg->end - (cell)end);
-	while(scan && scan < (heap_block *)end)
+	add_to_free_list(end);
-	{
-		if(scan->type() == FREE_BLOCK_TYPE)
-			add_to_free_list((free_heap_block *)scan);
-
-		prev = scan;
-		scan = next_block(scan);
-	}
-
-	/* If there is room at the end of the heap, add a free block. This
-	branch is only taken after loading a new image, not after code GC */
-	if((cell)(end + 1) <= seg->end)
-	{
-		end->set_marked_p(false);
-		end->set_type(FREE_BLOCK_TYPE);
-		end->set_size(seg->end - (cell)end);
-
-		/* add final free block */
-		add_to_free_list(end);
-	}
-	/* This branch is taken if the newly loaded image fits exactly, or
-	after code GC */
-	else
-	{
-		/* even if there's no room at the end of the heap for a new
-		free block, we might have to jigger it up by a few bytes in
-		case prev + prev->size */
-		if(prev) prev->set_size(seg->end - (cell)prev);
-	}
-
 }
 
 void heap::assert_free_block(free_heap_block *block)
@@ -154,7 +126,6 @@ heap_block *heap::heap_allot(cell size, cell type)
 	{
 		block = split_free_block(block,size);
 		block->set_type(type);
-		block->set_marked_p(false);
 		return block;
 	}
 	else
@@ -170,18 +141,7 @@ void heap::heap_free(heap_block *block)
 
 void heap::mark_block(heap_block *block)
 {
-	block->set_marked_p(true);
+	state->set_marked_p(block,true);
-}
-
-void heap::clear_mark_bits()
-{
-	heap_block *scan = first_block();
-
-	while(scan)
-	{
-		scan->set_marked_p(false);
-		scan = next_block(scan);
-	}
 }
 
 /* Compute total sum of sizes of free blocks, and size of largest free block */
@@ -210,20 +170,21 @@ void heap::heap_usage(cell *used, cell *total_free, cell *max_free)
 	}
 }
 
-/* The size of the heap, not including the last block if it's free */
+/* The size of the heap after compaction */
 cell heap::heap_size()
 {
 	heap_block *scan = first_block();
 	
-	while(next_block(scan) != NULL)
+	while(scan)
-		scan = next_block(scan);
+	{
+		if(scan->type() == FREE_BLOCK_TYPE) break;
+		else scan = next_block(scan);
+	}
 
-	/* this is the last block in the heap, and it is free */
+	assert(scan->type() == FREE_BLOCK_TYPE);
-	if(scan->type() == FREE_BLOCK_TYPE)
+	assert((cell)scan + scan->size() == seg->end);
-		return (cell)scan - seg->start;
+
-	/* otherwise the last block is allocated */
+	return (cell)scan - (cell)first_block();
-	else
-		return seg->size;
 }
 
 void heap::compact_heap()
@@ -238,7 +199,7 @@ void heap::compact_heap()
 	{
 		heap_block *next = next_block(scan);
  
-		if(scan->type() != FREE_BLOCK_TYPE && scan->marked_p())
+		if(state->is_marked_p(scan))
 		{
 			cell size = scan->size();
 			memmove(address,scan,size);

vm/heap.hpp

@@ -13,9 +13,11 @@ struct heap {
 	bool secure_gc;
 	segment *seg;
 	heap_free_list free;
+	mark_bits<heap_block,block_size_increment> *state;
 	unordered_map<heap_block *, char *> forwarding;
 
 	explicit heap(bool secure_gc_, cell size, bool executable_p);
+	~heap();
 
 	inline heap_block *next_block(heap_block *block)
 	{
@@ -46,7 +48,6 @@ struct heap {
 	heap_block *heap_allot(cell size, cell type);
 	void heap_free(heap_block *block);
 	void mark_block(heap_block *block);
-	void clear_mark_bits();
 	void heap_usage(cell *used, cell *total_free, cell *max_free);
 	cell heap_size();
 	void compact_heap();
@@ -71,11 +72,10 @@ struct heap {
 				else
 					prev = scan;
 			}
-			else if(scan->marked_p())
+			else if(state->is_marked_p(scan))
 			{
 				if(prev && prev->type() == FREE_BLOCK_TYPE)
 					add_to_free_list((free_heap_block *)prev);
-				scan->set_marked_p(false);
 				prev = scan;
 				iter(scan);
 			}

vm/image.cpp

@@ -67,86 +67,6 @@ void factor_vm::load_code_heap(FILE *file, image_header *h, vm_parameters *p)
 	code->build_free_list(h->code_size);
 }
 
-/* Save the current image to disk */
-bool factor_vm::save_image(const vm_char *filename)
-{
-	FILE* file;
-	image_header h;
-
-	file = OPEN_WRITE(filename);
-	if(file == NULL)
-	{
-		print_string("Cannot open image file: "); print_native_string(filename); nl();
-		print_string(strerror(errno)); nl();
-		return false;
-	}
-
-	h.magic = image_magic;
-	h.version = image_version;
-	h.data_relocation_base = data->tenured->start;
-	h.data_size = data->tenured->here - data->tenured->start;
-	h.code_relocation_base = code->seg->start;
-	h.code_size = code->heap_size();
-
-	h.true_object = true_object;
-	h.bignum_zero = bignum_zero;
-	h.bignum_pos_one = bignum_pos_one;
-	h.bignum_neg_one = bignum_neg_one;
-
-	for(cell i = 0; i < USER_ENV; i++)
-		h.userenv[i] = (save_env_p(i) ? userenv[i] : false_object);
-
-	bool ok = true;
-
-	if(fwrite(&h,sizeof(image_header),1,file) != 1) ok = false;
-	if(fwrite((void*)data->tenured->start,h.data_size,1,file) != 1) ok = false;
-	if(fwrite(code->first_block(),h.code_size,1,file) != 1) ok = false;
-	if(fclose(file)) ok = false;
-
-	if(!ok)
-	{
-		print_string("save-image failed: "); print_string(strerror(errno)); nl();
-	}
-
-	return ok;
-}
-
-void factor_vm::primitive_save_image()
-{
-	/* do a full GC to push everything into tenured space */
-	primitive_compact_gc();
-
-	gc_root<byte_array> path(dpop(),this);
-	path.untag_check(this);
-	save_image((vm_char *)(path.untagged() + 1));
-}
-
-void factor_vm::primitive_save_image_and_exit()
-{
-	/* We unbox this before doing anything else. This is the only point
-	where we might throw an error, so we have to throw an error here since
-	later steps destroy the current image. */
-	gc_root<byte_array> path(dpop(),this);
-	path.untag_check(this);
-
-	/* strip out userenv data which is set on startup anyway */
-	for(cell i = 0; i < USER_ENV; i++)
-	{
-		if(!save_env_p(i)) userenv[i] = false_object;
-	}
-
-	gc(collect_full_op,
-		0, /* requested size */
-		false, /* discard objects only reachable from stacks */
-		true /* compact the code heap */);
-
-	/* Save the image */
-	if(save_image((vm_char *)(path.untagged() + 1)))
-		exit(0);
-	else
-		exit(1);
-}
-
 void factor_vm::data_fixup(cell *handle, cell data_relocation_base)
 {
 	if(immediate_p(*handle))
@@ -353,4 +273,82 @@ void factor_vm::load_image(vm_parameters *p)
 	userenv[IMAGE_ENV] = allot_alien(false_object,(cell)p->image_path);
 }
 
+/* Save the current image to disk */
+bool factor_vm::save_image(const vm_char *filename)
+{
+	FILE* file;
+	image_header h;
+
+	file = OPEN_WRITE(filename);
+	if(file == NULL)
+	{
+		print_string("Cannot open image file: "); print_native_string(filename); nl();
+		print_string(strerror(errno)); nl();
+		return false;
+	}
+
+	h.magic = image_magic;
+	h.version = image_version;
+	h.data_relocation_base = data->tenured->start;
+	h.data_size = data->tenured->here - data->tenured->start;
+	h.code_relocation_base = code->seg->start;
+	h.code_size = code->heap_size();
+
+	h.true_object = true_object;
+	h.bignum_zero = bignum_zero;
+	h.bignum_pos_one = bignum_pos_one;
+	h.bignum_neg_one = bignum_neg_one;
+
+	for(cell i = 0; i < USER_ENV; i++)
+		h.userenv[i] = (save_env_p(i) ? userenv[i] : false_object);
+
+	bool ok = true;
+
+	if(fwrite(&h,sizeof(image_header),1,file) != 1) ok = false;
+	if(fwrite((void*)data->tenured->start,h.data_size,1,file) != 1) ok = false;
+	if(fwrite(code->first_block(),h.code_size,1,file) != 1) ok = false;
+	if(fclose(file)) ok = false;
+
+	if(!ok)
+	{
+		print_string("save-image failed: "); print_string(strerror(errno)); nl();
+	}
+
+	return ok;
+}
+
+void factor_vm::primitive_save_image()
+{
+	/* do a full GC to push everything into tenured space */
+	primitive_compact_gc();
+
+	gc_root<byte_array> path(dpop(),this);
+	path.untag_check(this);
+	save_image((vm_char *)(path.untagged() + 1));
+}
+
+void factor_vm::primitive_save_image_and_exit()
+{
+	/* We unbox this before doing anything else. This is the only point
+	where we might throw an error, so we have to throw an error here since
+	later steps destroy the current image. */
+	gc_root<byte_array> path(dpop(),this);
+	path.untag_check(this);
+
+	/* strip out userenv data which is set on startup anyway */
+	for(cell i = 0; i < USER_ENV; i++)
+		if(!save_env_p(i)) userenv[i] = false_object;
+
+	gc(collect_full_op,
+		0, /* requested size */
+		false, /* discard objects only reachable from stacks */
+		true /* compact the code heap */);
+
+	/* Save the image */
+	if(save_image((vm_char *)(path.untagged() + 1)))
+		exit(0);
+	else
+		exit(1);
+}
+
 }

vm/layouts.hpp

@@ -201,15 +201,6 @@ struct heap_block
 {
 	cell header;
 
-	bool marked_p() { return header & 1; }
-	void set_marked_p(bool marked)
-	{
-		if(marked)
-			header |= 1;
-		else
-			header &= ~1;
-	}
-
 	cell type() { return (header >> 1) & 0x1f; }
 	void set_type(cell type)
 	{

vm/mark_bits.hpp

@@ -0,0 +1,103 @@
+namespace factor
+{
+
+const int forwarding_granularity = 128;
+
+template<typename Block, int Granularity> struct mark_bits {
+	cell start;
+	cell size;
+	cell bits_size;
+	unsigned int *marked;
+	unsigned int *freed;
+	cell forwarding_size;
+	cell *forwarding;
+
+	void clear_mark_bits()
+	{
+		memset(marked,0,bits_size * sizeof(unsigned int));
+	}
+
+	void clear_free_bits()
+	{
+		memset(freed,0,bits_size * sizeof(unsigned int));
+	}
+
+	void clear_forwarding()
+	{
+		memset(forwarding,0,forwarding_size * sizeof(cell));
+	}
+
+	explicit mark_bits(cell start_, cell size_) :
+		start(start_),
+		size(size_),
+		bits_size(size / Granularity / 32),
+		marked(new unsigned int[bits_size]),
+		freed(new unsigned int[bits_size]),
+		forwarding_size(size / Granularity / forwarding_granularity),
+		forwarding(new cell[forwarding_size])
+	{
+		clear_mark_bits();
+		clear_free_bits();
+		clear_forwarding();
+	}
+
+	~mark_bits()
+	{
+		delete[] marked;
+		marked = NULL;
+		delete[] freed;
+		freed = NULL;
+		delete[] forwarding;
+		forwarding = NULL;
+	}
+
+	std::pair<cell,cell> bitmap_deref(Block *address)
+	{
+		cell word_number = (((cell)address - start) / Granularity);
+		cell word_index = (word_number >> 5);
+		cell word_shift = (word_number & 31);
+
+#ifdef FACTOR_DEBUG
+		assert(word_index < bits_size);
+#endif
+
+		return std::make_pair(word_index,word_shift);
+	}
+
+	bool bitmap_elt(unsigned int *bits, Block *address)
+	{
+		std::pair<cell,cell> pair = bitmap_deref(address);
+		return (bits[pair.first] & (1 << pair.second)) != 0;
+	}
+
+	void set_bitmap_elt(unsigned int *bits, Block *address, bool flag)
+	{
+		std::pair<cell,cell> pair = bitmap_deref(address);
+		if(flag)
+			bits[pair.first] |= (1 << pair.second);
+		else
+			bits[pair.first] &= ~(1 << pair.second);
+	}
+
+	bool is_marked_p(Block *address)
+	{
+		return bitmap_elt(marked,address);
+	}
+
+	void set_marked_p(Block *address, bool marked_p)
+	{
+		set_bitmap_elt(marked,address,marked_p);
+	}
+
+	bool is_free_p(Block *address)
+	{
+		return bitmap_elt(freed,address);
+	}
+
+	void set_free_p(Block *address, bool free_p)
+	{
+		set_bitmap_elt(freed,address,free_p);
+	}
+};
+
+}

vm/master.hpp

@@ -78,6 +78,7 @@ namespace factor
 #include "words.hpp"
 #include "float_bits.hpp"
 #include "io.hpp"
+#include "mark_bits.hpp"
 #include "heap.hpp"
 #include "image.hpp"
 #include "alien.hpp"

vm/vm.hpp

@@ -253,8 +253,6 @@ struct factor_vm
 	void collect_nursery();
 	void collect_aging();
 	void collect_to_tenured();
-	void big_code_heap_update();
-	void small_code_heap_update();
 	void collect_full_impl(bool trace_contexts_p);
 	void collect_growing_heap(cell requested_bytes, bool trace_contexts_p, bool compact_code_heap_p);
 	void collect_full(bool trace_contexts_p, bool compact_code_heap_p);