-/*
- * Generational Conservative Garbage Collector for SBCL x86
- */
-
-/*
- * This software is part of the SBCL system. See the README file for
- * more information.
- *
- * This software is derived from the CMU CL system, which was
- * written at Carnegie Mellon University and released into the
- * public domain. The software is in the public domain and is
- * provided with absolutely no warranty. See the COPYING and CREDITS
- * files for more information.
- */
-
-#ifndef _GENCGC_H_
-#define _GENCGC_H_
-
-#include "genesis/code.h"
-
-void gc_free_heap(void);
-inline int find_page_index(void *);
-inline void *page_address(int);
-int gencgc_handle_wp_violation(void *);
-lispobj *search_dynamic_space(lispobj *);
-\f
-struct page {
-
- unsigned
- /* This is set when the page is write-protected. This should
- * always reflect the actual write_protect status of a page.
- * (If the page is written into, we catch the exception, make
- * the page writable, and clear this flag.) */
- write_protected :1,
- /* This flag is set when the above write_protected flag is
- * cleared by the SIGBUS handler (or SIGSEGV handler, for some
- * OSes). This is useful for re-scavenging pages that are
- * written during a GC. */
- write_protected_cleared :1,
- /* the region the page is allocated to: 0 for a free page; 1
- * for boxed objects; 2 for unboxed objects. If the page is
- * free the following slots are invalid (well the bytes_used
- * must be 0). */
- allocated :2,
- /* If this page should not be moved during a GC then this flag
- * is set. It's only valid during a GC for allocated pages. */
- dont_move :1,
- /* If the page is part of a large object then this flag is
- * set. No other objects should be allocated to these pages.
- * This is only valid when the page is allocated. */
- large_object :1;
-
- /* the generation that this page belongs to. This should be valid
- * for all pages that may have objects allocated, even current
- * allocation region pages - this allows the space of an object to
- * be easily determined. */
- int gen;
-
- /* the number of bytes of this page that are used. This may be less
- * than the actual bytes used for pages within the current
- * allocation regions. It should be 0 for all unallocated pages (not
- * hard to achieve). */
- int bytes_used;
-
- /* It is important to know the offset to the first object in the
- * page. Currently it's only important to know if an object starts
- * at the beginning of the page in which case the offset would be 0. */
- int first_object_offset;
-};
-
-/* values for the page.allocated field */
-#define FREE_PAGE 0
-#define BOXED_PAGE 1
-#define UNBOXED_PAGE 2
-
-/* values for the *_alloc_* parameters */
-#define ALLOC_BOXED 0
-#define ALLOC_UNBOXED 1
-#define ALLOC_QUICK 1
-
-\f
-/* the number of pages needed for the dynamic space - rounding up */
-#define NUM_PAGES ((DYNAMIC_SPACE_SIZE+4095)/4096)
-extern struct page page_table[NUM_PAGES];
-\f
-\f
-void gencgc_pickup_dynamic(void);
-
-void sniff_code_object(struct code *code, unsigned displacement);
-
-int update_x86_dynamic_space_free_pointer(void);
-void gc_alloc_update_page_tables(int unboxed,
- struct alloc_region *alloc_region);
-void gc_alloc_update_all_page_tables(void);
-void gc_set_region_empty(struct alloc_region *region);
-#endif /* _GENCGC_H_ */