81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
typedef enum
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{
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B_FREE,
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B_ALLOCATED,
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B_MARKED
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} F_BLOCK_STATUS;
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typedef struct _F_BLOCK
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{
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F_BLOCK_STATUS status;
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CELL size;
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struct _F_BLOCK *next_free;
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} F_BLOCK;
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typedef struct {
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CELL base;
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CELL limit;
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F_BLOCK *free_list;
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} HEAP;
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void new_heap(HEAP *heap, CELL size);
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void build_free_list(HEAP *heap, CELL size);
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CELL heap_allot(HEAP *heap, CELL size);
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void free_unmarked(HEAP *heap);
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CELL heap_free_space(HEAP *heap);
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CELL heap_size(HEAP *heap);
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INLINE F_BLOCK *next_block(HEAP *heap, F_BLOCK *block)
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{
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CELL next = ((CELL)block + block->size);
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if(next == heap->limit)
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return NULL;
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else
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return (F_BLOCK *)next;
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}
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/* compiled code */
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HEAP compiling;
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/* The compiled code heap is structured into blocks. */
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typedef struct
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{
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CELL code_length; /* # bytes */
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CELL reloc_length; /* # bytes */
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CELL literal_length; /* # bytes */
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CELL words_length; /* # bytes */
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CELL finalized; /* has finalize_code_block() been called on this yet? */
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} F_COMPILED;
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typedef void (*CODE_HEAP_ITERATOR)(F_COMPILED *compiled, CELL code_start,
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CELL reloc_start, CELL literal_start, CELL words_start, CELL words_end);
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INLINE void iterate_code_heap_step(F_COMPILED *compiled, CODE_HEAP_ITERATOR iter)
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{
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CELL code_start = (CELL)(compiled + 1);
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CELL reloc_start = code_start + compiled->code_length;
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CELL literal_start = reloc_start + compiled->reloc_length;
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CELL words_start = literal_start + compiled->literal_length;
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CELL words_end = words_start + compiled->words_length;
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iter(compiled,code_start,reloc_start,literal_start,words_start,words_end);
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}
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INLINE F_BLOCK *xt_to_block(CELL xt)
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{
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return (F_BLOCK *)(xt - sizeof(F_BLOCK) - sizeof(F_COMPILED));
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}
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INLINE F_COMPILED *xt_to_compiled(CELL xt)
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{
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return (F_COMPILED *)(xt - sizeof(F_COMPILED));
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}
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void init_code_heap(CELL size);
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void iterate_code_heap(CODE_HEAP_ITERATOR iter);
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void collect_literals(void);
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void recursive_mark(CELL xt);
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void primitive_code_room(void);
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void primitive_code_gc(void);
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void dump_heap(HEAP *heap);
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