1 ;;;; Package (locking) related macros needed on the target before most
2 ;;;; of the package machinery is available.
4 ;;;; This software is part of the SBCL system. See the README file for
7 ;;;; This software is derived from the CMU CL system, which was
8 ;;;; written at Carnegie Mellon University and released into the
9 ;;;; public domain. The software is in the public domain and is
10 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
11 ;;;; files for more information.
13 (in-package "SB!IMPL")
15 (!begin-collecting-cold-init-forms)
17 ;;; Unbound outside package lock context, inside either list of
18 ;;; packages for which locks are ignored, T when locks for
19 ;;; all packages are ignored, and :invalid outside package-lock
20 ;;; context. FIXME: This needs to be rebound for each thread.
21 (defvar *ignored-package-locks*
22 (error "*IGNORED-PACKAGE-LOCKS* should be set up in cold-init."))
24 (setf *ignored-package-locks* :invalid))
26 (defmacro with-single-package-locked-error ((&optional kind thing &rest format)
28 #!-sb-package-locks (declare (ignore kind thing format))
32 (with-unique-names (topmost)
34 (/show0 ,(first format))
36 ;; We use assignment and conditional restoration instead of
37 ;; dynamic binding because we want the ignored locks
38 ;; to propagate to the topmost context.
39 (when (eq :invalid *ignored-package-locks*)
40 (setf *ignored-package-locks* nil
46 `((assert-symbol-home-package-unlocked ,thing ,@format)))
48 `((assert-package-unlocked
49 (find-undeleted-package-or-lose ,thing) ,@format)))
54 (setf *ignored-package-locks* :invalid)))))))
56 (defun compiler-assert-symbol-home-package-unlocked (symbol control)
58 (declare (ignore symbol control))
60 (flet ((resignal (condition)
61 ;; Signal the condition to give user defined handlers a chance,
62 ;; if they decline convert to compiler-error.
64 (sb!c:compiler-error condition)))
65 (handler-bind ((package-lock-violation #'resignal))
66 (with-single-package-locked-error ()
67 (assert-symbol-home-package-unlocked symbol control)))))
69 (defmacro without-package-locks (&body body)
71 "Ignores all runtime package lock violations during the execution of
72 body. Body can begin with declarations."
73 `(let (#!+sb-package-locks (*ignored-package-locks* t))
76 (!defun-from-collected-cold-init-forms !early-package-cold-init)