X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Ftarget-hash-table.lisp;h=090606a6509c19ef21c1b06c447380b6f5a9543f;hb=007bcd5aac2f3a1e714563bd39f7a2db2d0bf7c2;hp=2a926166c8a9f8f66ad33851dfce68cecd9e070a;hpb=57b330cc8334015f9953d7fb82a30afc82d2a471;p=sbcl.git

diff --git a/src/code/target-hash-table.lisp b/src/code/target-hash-table.lisp
index 2a92616..090606a 100644
--- a/src/code/target-hash-table.lisp
+++ b/src/code/target-hash-table.lisp
@@ -520,22 +520,22 @@ multiple threads accessing the same hash-table without locking."
                                  &body body)
   (declare (type (member :read :write) operation))
   (with-unique-names (body-fun)
-    `(with-concurrent-access-check ,hash-table ,operation
-       (flet ((,body-fun ()
+    `(flet ((,body-fun ()
+              (with-concurrent-access-check ,hash-table ,operation
                 (locally (declare (inline ,@inline))
-                  ,@body)))
-         (if (hash-table-weakness ,hash-table)
-             (sb!thread::with-recursive-system-spinlock
-                 ((hash-table-spinlock ,hash-table) :without-gcing t)
-               (,body-fun))
-             (with-pinned-objects ,pin
-               (if ,synchronized
-                   ;; We use a "system" spinlock here because it is very
-                   ;; slightly faster, as it doesn't re-enable interrupts.
-                   (sb!thread::with-recursive-system-spinlock
-                       ((hash-table-spinlock ,hash-table))
-                     (,body-fun))
-                   (,body-fun))))))))
+                  ,@body))))
+       (if (hash-table-weakness ,hash-table)
+           (sb!thread::with-recursive-system-spinlock
+               ((hash-table-spinlock ,hash-table) :without-gcing t)
+             (,body-fun))
+           (with-pinned-objects ,pin
+             (if ,synchronized
+                 ;; We use a "system" spinlock here because it is very
+                 ;; slightly faster, as it doesn't re-enable interrupts.
+                 (sb!thread::with-recursive-system-spinlock
+                     ((hash-table-spinlock ,hash-table))
+                   (,body-fun))
+                 (,body-fun)))))))
 
 (defun gethash (key hash-table &optional default)
   #!+sb-doc
@@ -564,7 +564,7 @@ if there is no such entry. Entries can be added using SETF."
                     ;; redo the lookup if the GC epoch counter has changed.
                     ;; -- JES,  2007-09-30
                     `(if (and (not ,foundp)
-                              (not (eql start-epoch sb!kernel::*gc-epoch*)))
+                              (not (eq start-epoch sb!kernel::*gc-epoch*)))
                          (go start)
                          (return-from %gethash3 (values ,value ,foundp))))
                   (overflow ()
@@ -816,40 +816,41 @@ there was such an entry, or NIL if not."
   (declare (type hash-table hash-table)
            (values (member t nil)))
   (with-hash-table-locks (hash-table :inline (%remhash) :pin (key))
-  ;; For now, just clear the cache
-  (setf (hash-table-cache hash-table) nil)
+    ;; For now, just clear the cache
+    (setf (hash-table-cache hash-table) nil)
     (%remhash key hash-table)))
 
 (defun clrhash (hash-table)
   #!+sb-doc
   "This removes all the entries from HASH-TABLE and returns the hash
 table itself."
-  (with-hash-table-locks (hash-table)
-    (let* ((kv-vector (hash-table-table hash-table))
-           (next-vector (hash-table-next-vector hash-table))
-           (hash-vector (hash-table-hash-vector hash-table))
-           (size (length next-vector))
-           (index-vector (hash-table-index-vector hash-table)))
-      ;; Disable GC tricks.
-      (set-header-data kv-vector sb!vm:vector-normal-subtype)
-      ;; Mark all slots as empty by setting all keys and values to magic
-      ;; tag.
-      (aver (eq (aref kv-vector 0) hash-table))
-      (fill kv-vector +empty-ht-slot+ :start 2)
-      ;; Set up the free list, all free.
-      (do ((i 1 (1+ i)))
-          ((>= i (1- size)))
-        (setf (aref next-vector i) (1+ i)))
-      (setf (aref next-vector (1- size)) 0)
-      (setf (hash-table-next-free-kv hash-table) 1)
-      ;; Clear the index-vector.
-      (fill index-vector 0)
-      ;; Clear the hash-vector.
-      (when hash-vector
-        (fill hash-vector +magic-hash-vector-value+)))
-    (setf (hash-table-cache hash-table) nil)
-    (setf (hash-table-number-entries hash-table) 0)
-    hash-table))
+  (when (plusp (hash-table-number-entries hash-table))
+    (with-hash-table-locks (hash-table)
+      (let* ((kv-vector (hash-table-table hash-table))
+             (next-vector (hash-table-next-vector hash-table))
+             (hash-vector (hash-table-hash-vector hash-table))
+             (size (length next-vector))
+             (index-vector (hash-table-index-vector hash-table)))
+        ;; Disable GC tricks.
+        (set-header-data kv-vector sb!vm:vector-normal-subtype)
+        ;; Mark all slots as empty by setting all keys and values to magic
+        ;; tag.
+        (aver (eq (aref kv-vector 0) hash-table))
+        (fill kv-vector +empty-ht-slot+ :start 2)
+        ;; Set up the free list, all free.
+        (do ((i 1 (1+ i)))
+            ((>= i (1- size)))
+          (setf (aref next-vector i) (1+ i)))
+        (setf (aref next-vector (1- size)) 0)
+        (setf (hash-table-next-free-kv hash-table) 1)
+        ;; Clear the index-vector.
+        (fill index-vector 0)
+        ;; Clear the hash-vector.
+        (when hash-vector
+          (fill hash-vector +magic-hash-vector-value+)))
+      (setf (hash-table-cache hash-table) nil)
+      (setf (hash-table-number-entries hash-table) 0)))
+  hash-table)
 
 
 ;;;; MAPHASH