[Sbcl-commits] CVS: sbcl NEWS, 1.1221, 1.1222 version.lisp-expr, 1.3498, 1.3499

[Nikodemus S. <de...@us...>]

Update of /cvsroot/sbcl/sbcl
In directory sc8-pr-cvs8.sourceforge.net:/tmp/cvs-serv21888

Modified Files:
	NEWS version.lisp-expr 
Log Message:
1.0.7.14: thread-safe INTERN, EXPORT, &co

 * Modifications to packages grab a global lock. INTERN is the only
   real potential performance bottleneck here, but as long as the
   symbol already exists it doesn't need to get the lock.

   We need a global lock instead of a per-package lock because eg.
   (EXPORT 'FOO::BAR :FOO) and (INTERN "BAR" :ZOT) can conflict, even
   though they operate on different packages.

   Since races should be rare we use a spinlock to avoid making a
   system call for every release.

   Interrupt safety? Probably no. It's likely that you can wedge the
   package system into a bad state if you really try.


Index: NEWS
===================================================================
RCS file: /cvsroot/sbcl/sbcl/NEWS,v
retrieving revision 1.1221
retrieving revision 1.1222
diff -u -d -r1.1221 -r1.1222
--- NEWS	2 Jul 2007 16:58:20 -0000	1.1221
+++ NEWS	11 Jul 2007 13:56:49 -0000	1.1222
@@ -17,6 +17,8 @@
     objects that can be seen by the GC.
   * bug fix: defaulting of values in contexts expecting more than 7
     variables now works on x86-64.  (reported by Christopher Laux)
+  * bug fix: modifications to packages (INTERN, EXPORT, etc) are now
+    thread safe.
 
 changes in sbcl-1.0.7 relative to sbcl-1.0.6:
   * MOP improvement: support for user-defined subclasses of

Index: version.lisp-expr
===================================================================
RCS file: /cvsroot/sbcl/sbcl/version.lisp-expr,v
retrieving revision 1.3498
retrieving revision 1.3499
diff -u -d -r1.3498 -r1.3499
--- version.lisp-expr	4 Jul 2007 00:15:27 -0000	1.3498
+++ version.lisp-expr	11 Jul 2007 13:56:49 -0000	1.3499
@@ -17,4 +17,4 @@
 ;;; checkins which aren't released. (And occasionally for internal
 ;;; versions, especially for internal versions off the main CVS
 ;;; branch, it gets hairier, e.g. "0.pre7.14.flaky4.13".)
-"1.0.7.13"
+"1.0.7.14"