0.pre7.28:

[sbcl.git] / src / code / target-extensions.lisp

diff --git a/src/code/target-extensions.lisp b/src/code/target-extensions.lisp
index fe2bbfc..adf1f84 100644 (file)
--- a/src/code/target-extensions.lisp
+++ b/src/code/target-extensions.lisp
@@ -1,10 +1,10 @@
-;;;; This file contains things for the extensions package which can't
-;;;; be built at cross-compile time, and perhaps also some things
-;;;; which might as well not be built at cross-compile time because
-;;;; they're not needed then. Things which can't be built at
-;;;; cross-compile time (e.g. because they need machinery which only
-;;;; exists inside SBCL's implementation of the LISP package) do not
-;;;; belong in this file.
+;;;; This file contains things for the extensions packages (SB-EXT and
+;;;; also "internal extensions" SB-INT) which can't be built at
+;;;; cross-compile time, and perhaps also some things which might as
+;;;; well not be built at cross-compile time because they're not
+;;;; needed then. Things which can't be built at cross-compile time
+;;;; (e.g. because they need machinery which only exists inside SBCL's
+;;;; implementation of the LISP package) do not belong in this file.
 
 ;;;; This software is part of the SBCL system. See the README file for
 ;;;; more information.
@@ -17,19 +17,25 @@
 
 (in-package "SB!IMPL")
 \f
-;;;; miscellaneous I/O
+;;;; variables related to saving core files
+;;;;
+;;;; (Most of the save-a-core functionality is defined later, in its
+;;;; own file, but we'd like to have these symbols declared special
+;;;; and initialized ASAP.)
 
-;;; INDENTING-FURTHER is a user-level macro which may be used to locally
-;;; increment the indentation of a stream.
-(defmacro indenting-further (stream more &rest body)
+(defvar *before-save-initializations* nil
   #!+sb-doc
-  "Causes the output of the indenting Stream to indent More spaces. More is
-  evaluated twice."
-  `(unwind-protect
-     (progn
-      (incf (sb!impl::indenting-stream-indentation ,stream) ,more)
-      ,@body)
-     (decf (sb!impl::indenting-stream-indentation ,stream) ,more)))
+  "This is a list of functions which are called before creating a saved core
+  image. These functions are executed in the child process which has no ports,
+  so they cannot do anything that tries to talk to the outside world.")
+
+(defvar *after-save-initializations* nil
+  #!+sb-doc
+  "This is a list of functions which are called when a saved core image starts
+  up. The system itself should be initialized at this point, but applications
+  might not be.")
+\f
+;;;; miscellaneous I/O
 
 (defun skip-whitespace (&optional (stream *standard-input*))
   (loop (let ((char (read-char stream)))
@@ -63,3 +69,29 @@
         :format-control "~@<~A: ~2I~_~A~:>"
         :format-arguments (list prefix-string (strerror errno))
         other-condition-args))
+\f
+;;;; optimization idioms
+
+(eval-when (:compile-toplevel :load-toplevel :execute)
+
+  ;; Byte compile this thing if possible.
+  (defvar *optimize-byte-compilation*
+    '(optimize (speed 0) (safety 1)))
+
+  ;; This thing is externally visible, so compiling meta-information
+  ;; is more important than byte-compiling it; but it's otherwise
+  ;; suitable for byte-compilation.
+  ;;
+  ;; (As long as the byte compiler isn't capable of compiling
+  ;; meta-information such as the argument list required by functions
+  ;; (as in sbcl-0.6.12, anyway), it's not suitable for compiling
+  ;; externally visible things like CL:INSPECT even if their speed
+  ;; requirements are small enough that it'd otherwise be OK. If some
+  ;; later version of the byte compiler learns to compile such
+  ;; meta-information, we'll probably change the implementation of
+  ;; this idiom so that it causes byte compilation of the thing after
+  ;; all.)
+  (defvar *optimize-external-despite-byte-compilation*
+    '(optimize (speed 1)
+              ;; still might as well be as small as possible..
+              (space 3))))