* io.c (rb_io_close): close(2) on a fd which is being read by

another thread causes deadlock on Mac OS X 10.5

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32462 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Sat Jul  9 08:37:05 2011  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* io.c (rb_io_close): close(2) on a fd which is being read by
+	  another thread causes deadlock on Mac OS X 10.5
+
 Fri Jul  8 21:20:39 2011  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* addr2line.c: use USE_ELF instead of __ELF__ because Solaris

io.c

@@ -3621,6 +3621,12 @@ rb_io_close(VALUE io)
     if (fptr->fd < 0) return Qnil;
 
     fd = fptr->fd;
+#if defined __APPLE__ && defined(__MACH__) && \
+    (!defined(MAC_OS_X_VERSION_MIN_ALLOWED) || MAC_OS_X_VERSION_MIN_ALLOWED <= 1050)
+    /* close(2) on a fd which is being read by another thread causes
+     * deadlock on Mac OS X 10.5 */
+    rb_thread_fd_close(fd);
+#endif
     rb_io_fptr_cleanup(fptr, FALSE);
     rb_thread_fd_close(fd);