src/runtime/gencgc-alloc-region.h

   1 #ifndef _GENCGC_ALLOC_REGION_H_
   2 #define _GENCGC_ALLOC_REGION_H_
   3
   4 #include "gc.h"
   5
   6 #ifndef LISP_FEATURE_GENCGC
   7 #error "gencgc-alloc-region.h included, but LISP_FEATURE_GENCGC not defined"
   8 #endif
   9
  10 /* Abstract out the data for an allocation region allowing a single
  11  * routine to be used for allocation and closing. */
  12 struct alloc_region {
  13
  14     /* These two are needed for quick allocation. */
  15     void  *free_pointer;
  16     void  *end_addr; /* pointer to the byte after the last usable byte */
  17
  18     /* These are needed when closing the region. */
  19     page_index_t  first_page;
  20     page_index_t  last_page;
  21     void  *start_addr;
  22 };
  23
  24 #ifdef LISP_FEATURE_SEGREGATED_CODE
  25 // One region for each of {BOXED,UNBOXED,CODE}_PAGE_FLAG
  26 extern struct alloc_region  gc_alloc_regions[3];
  27 #else
  28 extern struct alloc_region  boxed_region;
  29 extern struct alloc_region  unboxed_region;
  30 #endif
  31 extern generation_index_t from_space, new_space;
  32 extern struct weak_pointer *weak_pointers;
  33
  34 #endif /*  _GENCGC_ALLOC_REGION_H_ */