allocate.h

   1 #ifndef ALLOCATE_H
   2 #define ALLOCATE_H
   3
   4 #include "compat.h"
   5
   6 struct allocation_blob {
   7         struct allocation_blob *next;
   8         unsigned int left, offset;
   9         unsigned char data[];
  10 };
  11
  12 struct allocator_struct {
  13         const char *name;
  14         struct allocation_blob *blobs;
  15         unsigned int alignment;
  16         unsigned int chunking;
  17         void *freelist;
  18         /* statistics */
  19         unsigned long allocations, total_bytes, useful_bytes;
  20 };
  21
  22 struct allocator_stats {
  23         const char *name;
  24         unsigned int allocations;
  25         unsigned long total_bytes, useful_bytes;
  26 };
  27
  28 extern void protect_allocations(struct allocator_struct *desc);
  29 extern void drop_all_allocations(struct allocator_struct *desc);
  30 extern void *allocate(struct allocator_struct *desc, unsigned int size);
  31 extern void free_one_entry(struct allocator_struct *desc, void *entry);
  32 extern void show_allocations(struct allocator_struct *);
  33 extern void get_allocator_stats(struct allocator_struct *, struct allocator_stats *);
  34 extern void show_allocation_stats(void);
  35
  36 #define __DECLARE_ALLOCATOR(type, x)            \
  37         extern type *__alloc_##x(int);          \
  38         extern void __free_##x(type *);         \
  39         extern void show_##x##_alloc(void);     \
  40         extern void get_##x##_stats(struct allocator_stats *);          \
  41         extern void clear_##x##_alloc(void);    \
  42         extern void protect_##x##_alloc(void);
  43 #define DECLARE_ALLOCATOR(x) __DECLARE_ALLOCATOR(struct x, x)
  44
  45 #define __DO_ALLOCATOR(type, objsize, objalign, objname, x)     \
  46         static struct allocator_struct x##_allocator = {        \
  47                 .name = objname,                                \
  48                 .alignment = objalign,                          \
  49                 .chunking = CHUNK };                            \
  50         type *__alloc_##x(int extra)                            \
  51         {                                                       \
  52                 return allocate(&x##_allocator, objsize+extra); \
  53         }                                                       \
  54         void __free_##x(type *entry)                            \
  55         {                                                       \
  56                 free_one_entry(&x##_allocator, entry);          \
  57         }                                                       \
  58         void show_##x##_alloc(void)                             \
  59         {                                                       \
  60                 show_allocations(&x##_allocator);               \
  61         }                                                       \
  62         void get_##x##_stats(struct allocator_stats *s)         \
  63         {                                                       \
  64                 get_allocator_stats(&x##_allocator, s);         \
  65         }                                                       \
  66         void clear_##x##_alloc(void)                            \
  67         {                                                       \
  68                 drop_all_allocations(&x##_allocator);           \
  69         }                                                       \
  70         void protect_##x##_alloc(void)                          \
  71         {                                                       \
  72                 protect_allocations(&x##_allocator);            \
  73         }
  74
  75 #define __ALLOCATOR(t, n, x)                                    \
  76         __DO_ALLOCATOR(t, sizeof(t), __alignof__(t), n, x)
  77
  78 #define ALLOCATOR(x, n) __ALLOCATOR(struct x, n, x)
  79
  80 DECLARE_ALLOCATOR(ident);
  81 DECLARE_ALLOCATOR(token);
  82 DECLARE_ALLOCATOR(context);
  83 DECLARE_ALLOCATOR(symbol);
  84 DECLARE_ALLOCATOR(expression);
  85 DECLARE_ALLOCATOR(statement);
  86 DECLARE_ALLOCATOR(string);
  87 DECLARE_ALLOCATOR(scope);
  88 __DECLARE_ALLOCATOR(void, bytes);
  89 DECLARE_ALLOCATOR(basic_block);
  90 DECLARE_ALLOCATOR(entrypoint);
  91 DECLARE_ALLOCATOR(instruction);
  92 DECLARE_ALLOCATOR(multijmp);
  93 DECLARE_ALLOCATOR(pseudo);
  94 DECLARE_ALLOCATOR(attribute);
  95
  96 #endif