X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fearly-c.lisp;h=877d2c8fc8eb61cfd4b27c0d2cd94886aff1e572;hb=2ff0ff83dacac9fb25a31f5783b6ea8c0442bc2c;hp=54fffe9d77b3c2bd6b4bb60c5e148cc658c7c6c3;hpb=0c8643845555805048f50c783e118762e2c43a26;p=sbcl.git

diff --git a/src/compiler/early-c.lisp b/src/compiler/early-c.lisp
index 54fffe9..877d2c8 100644
--- a/src/compiler/early-c.lisp
+++ b/src/compiler/early-c.lisp
@@ -118,10 +118,17 @@ possible. Potentially long (over one page in size) vectors are, however, not
 stack allocated except in zero SAFETY code, as such a vector could overflow
 the stack without triggering overflow protection.")
 
-;;; This lock is seized in the compiler, and related areas: the
-;;; compiler is not presently thread-safe
-(defvar *big-compiler-lock*
-  (sb!thread:make-mutex :name "big compiler lock"))
+(!begin-collecting-cold-init-forms)
+;;; This lock is seized in the compiler, and related areas -- like the
+;;; classoid/layout/class system.
+(defvar *world-lock*)
+(!cold-init-forms
+ (setf *world-lock* (sb!thread:make-mutex :name "World Lock")))
+(!defun-from-collected-cold-init-forms !world-lock-cold-init)
+
+(defmacro with-world-lock (() &body body)
+  `(sb!thread:with-recursive-lock (*world-lock*)
+     ,@body))
 
 (declaim (type fixnum *compiler-sset-counter*))
 (defvar *compiler-sset-counter* 0)