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(defpackage "SHARED-LIBRARY" (:use "XLISP") (:nicknames "SHLIB"))
(in-package "SHARED-LIBRARY")
;;;;
;;;; Data Structure for Library
;;;;
(defstruct (shared-library
(:constructor (make-shared-library (name path handle subrs)))
(:print-function print-shlib))
name path handle subrs)
(defun print-shlib (shlib stream depth)
(format stream "#<shared library ~s>" (shared-library-name shlib)))
;;;;
;;;; Public Functions
;;;;
(export '(load-shared-library close-shared-library
shared-library-information))
(defun load-shared-library (path &optional
(name (pathname-name path))
(version -1)
(oldest version))
(let ((*package* *package*)
(handle (shlib-open path))
(success nil))
(unwind-protect
(let* ((init (shlib-symaddr handle (format nil "~a__init" name)))
(ftab (call-by-address init))
(subrs (shlib-init ftab version oldest))
(shlib (make-shared-library name path handle subrs)))
;;(register-saver shlib #'close-shared-library)
(setf success t)
shlib)
(unless success (shlib-close handle)))))
(defun close-shared-library (shlib)
;;(unregister-saver shlib)
(dolist (s (shared-library-subrs shlib))
(clear-subr s))
(shlib-close (shared-library-handle shlib)))
(defun shared-library-information (path &optional (name (pathname-name path)))
(let ((*package* *package*)
(handle (shlib-open path)))
(unwind-protect
(let* ((init (shlib-symaddr handle (format nil "~a__init" name)))
(ftab (call-by-address init)))
(shlib-info ftab))
(shlib-close handle))))
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