1 | /*
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2 | ** mruby/gc.h - garbage collector for mruby
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3 | **
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4 | ** See Copyright Notice in mruby.h
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5 | */
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6 |
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7 | #ifndef MRUBY_GC_H
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8 | #define MRUBY_GC_H
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9 |
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10 | #include "mruby/common.h"
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11 |
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12 | /**
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13 | * Uncommon memory management stuffs.
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14 | */
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15 | MRB_BEGIN_DECL
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16 |
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17 |
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18 | struct mrb_state;
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19 |
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20 | typedef void (mrb_each_object_callback)(struct mrb_state *mrb, struct RBasic *obj, void *data);
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21 | void mrb_objspace_each_objects(struct mrb_state *mrb, mrb_each_object_callback *callback, void *data);
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22 | MRB_API void mrb_free_context(struct mrb_state *mrb, struct mrb_context *c);
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23 |
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24 | #ifndef MRB_GC_ARENA_SIZE
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25 | #define MRB_GC_ARENA_SIZE 100
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26 | #endif
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27 |
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28 | typedef enum {
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29 | MRB_GC_STATE_ROOT = 0,
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30 | MRB_GC_STATE_MARK,
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31 | MRB_GC_STATE_SWEEP
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32 | } mrb_gc_state;
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33 |
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34 | typedef struct mrb_heap_page {
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35 | struct RBasic *freelist;
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36 | struct mrb_heap_page *prev;
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37 | struct mrb_heap_page *next;
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38 | struct mrb_heap_page *free_next;
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39 | struct mrb_heap_page *free_prev;
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40 | mrb_bool old:1;
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41 | void *objects[];
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42 | } mrb_heap_page;
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43 |
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44 | typedef struct mrb_gc {
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45 | mrb_heap_page *heaps; /* heaps for GC */
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46 | mrb_heap_page *sweeps;
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47 | mrb_heap_page *free_heaps;
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48 | size_t live; /* count of live objects */
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49 | #ifdef MRB_GC_FIXED_ARENA
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50 | struct RBasic *arena[MRB_GC_ARENA_SIZE]; /* GC protection array */
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51 | #else
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52 | struct RBasic **arena; /* GC protection array */
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53 | int arena_capa;
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54 | #endif
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55 | int arena_idx;
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56 |
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57 | mrb_gc_state state; /* state of gc */
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58 | int current_white_part; /* make white object by white_part */
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59 | struct RBasic *gray_list; /* list of gray objects to be traversed incrementally */
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60 | struct RBasic *atomic_gray_list; /* list of objects to be traversed atomically */
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61 | size_t live_after_mark;
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62 | size_t threshold;
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63 | int interval_ratio;
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64 | int step_ratio;
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65 | mrb_bool disabled :1;
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66 | mrb_bool full :1;
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67 | mrb_bool generational :1;
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68 | mrb_bool out_of_memory :1;
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69 | size_t majorgc_old_threshold;
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70 | } mrb_gc;
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71 |
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72 | MRB_API mrb_bool
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73 | mrb_object_dead_p(struct mrb_state *mrb, struct RBasic *object);
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74 |
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75 | MRB_END_DECL
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76 |
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77 | #endif /* MRUBY_GC_H */
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