X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Fhash-table.lisp;h=9f2a6b4325773ef5dad0e4f87d73c382a71c5268;hb=81a75e4657328daad0d63bdbf9555ef4d309c39d;hp=b17a17a993c9da6a5ce4ed838aff88fe0e9278a0;hpb=d2054d96f0c8200decf8b6b8560d754d3c541cd7;p=sbcl.git

diff --git a/src/code/hash-table.lisp b/src/code/hash-table.lisp
index b17a17a..9f2a6b4 100644
--- a/src/code/hash-table.lisp
+++ b/src/code/hash-table.lisp
@@ -39,11 +39,13 @@
   (number-entries 0 :type index)
   ;; The Key-Value pair vector.
   (table (missing-arg) :type simple-vector)
-  ;; True if this is a weak hash table, meaning that key->value
-  ;; mappings will disappear if there are no other references to the
-  ;; key. Note: this only matters if the hash function indicates that
-  ;; the hashing is EQ based.
-  (weak-p nil :type (member t nil))
+  ;; This slot is used to link weak hash tables during GC. When the GC
+  ;; isn't running it is always NIL.
+  (next-weak-hash-table nil :type null)
+  ;; Non-NIL if this is some kind of weak hash table. For details see
+  ;; the docstring of MAKE-HASH-TABLE.
+  (weakness nil :type (member nil :key :value :key-or-value :key-and-value)
+            :read-only t)
   ;; Index into the next-vector, chaining together buckets that need
   ;; to be rehashed because their hashing is EQ based and the key has
   ;; been moved by the garbage collector.
@@ -70,7 +72,9 @@
   ;; +MAGIC-HASH-VECTOR-VALUE+ represents EQ-based hashing on the
   ;; respective key.
   (hash-vector nil :type (or null (simple-array (unsigned-byte
-                                                 #.sb!vm:n-word-bits) (*)))))
+                                                 #.sb!vm:n-word-bits) (*))))
+  ;; This lock is acquired by %PUTHASH, REMHASH, CLRHASH and GETHASH.
+  (spinlock (sb!thread::make-spinlock)))
 
 ;; as explained by pmai on openprojects #lisp IRC 2002-07-30: #x80000000
 ;; is bigger than any possible nonEQ hash value, and thus indicates an