0.9.4.68:

[sbcl.git] / src / runtime / gencgc-internal.h

diff --git a/src/runtime/gencgc-internal.h b/src/runtime/gencgc-internal.h
index eaa7898..5da7981 100644 (file)
--- a/src/runtime/gencgc-internal.h
+++ b/src/runtime/gencgc-internal.h
@@ -29,36 +29,35 @@
 
 
 void gc_free_heap(void);
-inline int find_page_index(void *);
-inline void *page_address(int);
+inline long find_page_index(void *);
+inline void *page_address(long);
 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.) */
+         * 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
+        /* 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 :3,
-       /* If this page should not be moved during a GC then this flag
+        allocated :3,
+        /* 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
+        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;
+        large_object :1;
 
     /* the generation that this page belongs to. This should be valid
      * for all pages that may have objects allocated, even current
@@ -70,12 +69,13 @@ struct page {
      * 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;
+    long  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;
+    /* The name of this field is not well-chosen for its actual use.
+     * This is the offset from the start of the page to the start
+     * of the alloc_region which contains/contained it.  It's negative or 0
+     */
+    long  first_object_offset;
 };
 
 /* values for the page.allocated field */
@@ -83,27 +83,32 @@ struct page {
 \f
 /* the number of pages needed for the dynamic space - rounding up */
 #define NUM_PAGES ((DYNAMIC_SPACE_SIZE+PAGE_BYTES-1)/PAGE_BYTES)
+
 extern struct page page_table[NUM_PAGES];
 
 \f
+/* forward declarations */
 
 void sniff_code_object(struct code *code, unsigned displacement);
 void gencgc_apply_code_fixups(struct code *old_code, struct code *new_code);
 
-int  update_x86_dynamic_space_free_pointer(void);
+long  update_x86_dynamic_space_free_pointer(void);
 void  gc_alloc_update_page_tables(int unboxed,
-                                 struct alloc_region *alloc_region);
+                                  struct alloc_region *alloc_region);
+void gc_alloc_update_all_page_tables(void);
+void gc_set_region_empty(struct alloc_region *region);
+
 /*
  * predicates
  */
-static inline int 
-space_matches_p(lispobj obj, int space)
+static inline int
+space_matches_p(lispobj obj, long space)
 {
-    int page_index=(void*)obj - (void *)DYNAMIC_SPACE_START;
+    long page_index=(void*)obj - (void *)DYNAMIC_SPACE_START;
     return ((page_index >= 0)
-           && ((page_index =
-                ((unsigned int)page_index)/PAGE_BYTES) < NUM_PAGES)
-           && (page_table[page_index].gen == space));
+            && ((page_index =
+                 ((unsigned long)page_index)/PAGE_BYTES) < NUM_PAGES)
+            && (page_table[page_index].gen == space));
 }
 
 static inline boolean
@@ -120,4 +125,4 @@ new_space_p(lispobj obj)
 
 
 
-#endif 
+#endif