* files for more information.
*/
-/*
- * $Header$
- */
-
#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);
* (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. This is useful for
- * re-scavenging pages that are written during a GC. */
+ /* 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
+ /* 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). */
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
-/* Abstract out the data for an allocation region allowing a single
- * routine to be used for allocation and closing. */
-struct alloc_region {
-
- /* These two are needed for quick allocation. */
- void *free_pointer;
- void *end_addr; /* pointer to the byte after the last usable byte */
-
- /* needed when closing the region */
- int first_page;
- int last_page;
- void *start_addr;
-};
-
-extern struct alloc_region boxed_region;
-extern struct alloc_region unboxed_region;
\f
void gencgc_pickup_dynamic(void);
int update_x86_dynamic_space_free_pointer(void);
void gc_alloc_update_page_tables(int unboxed,
struct alloc_region *alloc_region);
-#endif _GENCGC_H_
+void gc_alloc_update_all_page_tables(void);
+void gc_set_region_empty(struct alloc_region *region);
+#endif /* _GENCGC_H_ */