Make SBCL buildable by Clang.

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

diff --git a/src/runtime/gencgc-internal.h b/src/runtime/gencgc-internal.h
index bb289fe..8640fe6 100644 (file)
--- a/src/runtime/gencgc-internal.h
+++ b/src/runtime/gencgc-internal.h
@@ -25,11 +25,23 @@
 #include "genesis/code.h"
 
 void gc_free_heap(void);
-inline page_index_t find_page_index(void *);
-inline void *page_address(page_index_t);
+extern page_index_t find_page_index(void *);
+extern void *page_address(page_index_t);
 int gencgc_handle_wp_violation(void *);
 \f
 
+#if GENCGC_CARD_BYTES > USHRT_MAX
+# if GENCGC_CARD_BYTES > UINT_MAX
+#   error "GENCGC_CARD_BYTES unexpectedly large."
+# else
+#   define PAGE_BYTES_FMT "u"
+    typedef unsigned int page_bytes_t;
+# endif
+#else
+# define PAGE_BYTES_FMT "hu"
+  typedef unsigned short page_bytes_t;
+#endif
+
 /* Note that this structure is also used from Lisp-side in
  * src/code/room.lisp, and the Lisp-side structure layout is currently
  * not groveled from C code but hardcoded. Any changes to the
@@ -42,18 +54,14 @@ struct page {
     /* This is the offset from the start of the page to the start of
      * the alloc_region which contains/contained it.
      */
-    unsigned long region_start_offset;
+    os_vm_size_t region_start_offset;
 
     /* 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).
      */
-#if PAGE_BYTES > USHRT_MAX
-    unsigned int bytes_used;
-#else
-    unsigned short bytes_used;
-#endif
+    page_bytes_t bytes_used;
 
     unsigned
         /* This is set when the page is write-protected. This should
@@ -66,10 +74,14 @@ struct page {
          * 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). */
+        /*  000 free
+         *  10? boxed data
+         *  11? boxed code
+         *  01? unboxed data
+         *  ??1 open region
+         *
+         * If the page is free the following slots are invalid, except
+         * for the bytes_used which must be zero. */
         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. */
@@ -78,7 +90,7 @@ struct page {
          * set. No other objects should be allocated to these pages.
          * This is only valid when the page is allocated. */
         large_object :1,
-        /* True if the page is known to contain only zeroes. */
+        /* Cleared if the page is known to contain only zeroes. */
         need_to_zero :1;
 
     /* the generation that this page belongs to. This should be valid
@@ -115,7 +127,7 @@ space_matches_p(lispobj obj, generation_index_t space)
 {
     if (obj >= DYNAMIC_SPACE_START) {
         page_index_t page_index=((pointer_sized_uint_t)obj
-                                 - DYNAMIC_SPACE_START) / PAGE_BYTES;
+                                 - DYNAMIC_SPACE_START) / GENCGC_CARD_BYTES;
         return ((page_index < page_table_pages) &&
                 (page_table[page_index].gen == space));
     } else {