X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Ftarget-extensions.lisp;h=cbaab4dcebcd2fcac586e2eab4680baaee48e24d;hb=602c9b1f15e2d96e4b79a3341a734b5eb8e02093;hp=28699d11817cfaeb809192ab0ad771c84a314e05;hpb=e5f24ebc38e38c986df830fd1e4035d16bea4e5c;p=sbcl.git

diff --git a/src/code/target-extensions.lisp b/src/code/target-extensions.lisp
index 28699d1..cbaab4d 100644
--- 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.
@@ -17,31 +17,48 @@
 
 (in-package "SB!IMPL")
 
-;;;; 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)))
-
-(defun skip-whitespace (&optional (stream *standard-input*))
-  (loop (let ((char (read-char stream)))
-	  (unless (sb!impl::whitespacep char)
-	    (return (unread-char char stream))))))
+  "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.")
 
-(defun listen-skip-whitespace (&optional (stream *standard-input*))
+(defvar *after-save-initializations* nil
   #!+sb-doc
-  "See LISTEN. Any whitespace in the input stream will be flushed."
+  "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.")
+
+;;; like LISTEN, but any whitespace in the input stream will be flushed
+(defun listen-skip-whitespace (&optional (stream *standard-input*))
   (do ((char (read-char-no-hang stream nil nil nil)
 	     (read-char-no-hang stream nil nil nil)))
       ((null char) nil)
-    (cond ((not (sb!impl::whitespace-char-p char))
+    (cond ((not (whitespacep char))
 	   (unread-char char stream)
 	   (return t)))))
+
+;;;; helpers for C library calls
+
+;;; Signal a SIMPLE-CONDITION/ERROR condition associated with an ANSI C
+;;; errno problem, arranging for the condition's print representation
+;;; to be similar to the ANSI C perror(3) style.
+(defun simple-perror (prefix-string
+		      &key
+		      (errno (get-errno))
+		      (simple-error 'simple-error)
+		      other-condition-args)
+  (declare (type symbol simple-error))
+  (aver (subtypep simple-error 'simple-condition))
+  (aver (subtypep simple-error 'error))
+  (apply #'error
+	 simple-error
+	 :format-control "~@<~A: ~2I~_~A~:>"
+	 :format-arguments (list prefix-string (strerror errno))
+	 other-condition-args))