141 lines
4.3 KiB
Scheme
141 lines
4.3 KiB
Scheme
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; Copyright (c) 1993, 1994 Richard Kelsey and Jonathan Rees. See file COPYING.
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; packages packages-internal scan compiler table
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; syntactic vm-exposure signals locations fluids template
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; closures types inline dump/restore
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; environments
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; Separate compilation
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; Setting the get-location method isn't sufficient because it won't
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; intercept locations in already existing structures (e.g. scheme)...
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;
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; cf. compile-structures in link.scm
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; Hacking the environment lookup mechanism to modify bindings on the
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; way out won't work, because it might cause denotation comparison to
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; fail during macro expansion...
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; So I think the best we can do is to maintain a location -> reference map.
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; There may be many routes to any particular location, but we'll only
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; be able to remember one of them.
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; (Actually, we _could_ remember all of them and then check at load time to
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; make sure that they all agree.)
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; The filtered environment also ought to be passed to the scanner,
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; because it caches looked-up bindings in nodes. The effect of not
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; doing this is to get warning at compile time, and unbound variables
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; at load time.
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(define (compile-package-to-file p filename)
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(let* ((table (make-table location-id))
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(env (package->separate p table))
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(stuff (scan-package p env))
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(templates '()))
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(for-each (lambda (filename+nodes)
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(set! templates
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(cons (compile-scanned-forms
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(cdr filename+nodes)
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p
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(car filename+nodes)
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(current-output-port)
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env)
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templates)))
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stuff)
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(call-with-output-file filename
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(lambda (port)
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(fasdump (reverse templates) p table port)))))
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(define (package->separate p table)
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(let ((cenv (package->environment p)))
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(lambda (name)
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(let ((probe (cenv name)))
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(if (and (pair? probe)
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(location? (cdr probe))
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(not (table-ref table (cdr probe))))
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(table-set! table
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(cdr probe)
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(cons (name->qualified name)
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(let ((type (binding-type probe)))
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(if (equal? type usual-variable-type)
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#f
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type)))))
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probe))))
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(define *level* 0)
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(define (fasdump templates p table port)
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(let* ((write-char (lambda (c)
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(write-char c port)))
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(dump (lambda (thing)
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(dump thing write-char -1))))
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(dump *level*)
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(dump (map structure-name (package-opens p))) ;lose
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(dump (map car (package-accesses p)))
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(table-walk (lambda (loc qname+type)
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(dump (location-id loc))
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(dump qname+type))
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table)
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(dump '-)
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(let-fluid $dump-index (lambda (loc)
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(if (table-ref table loc)
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(location-id loc)
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(begin (warn "lose" loc) #f)))
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(lambda ()
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(dump templates)))))
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(define (fasload filename name->structure)
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(call-with-input-file filename
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(lambda (port)
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(let* ((read-char (lambda () (read-char port)))
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(restore (lambda () (restore read-char)))
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(table (make-table))
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(level (restore)))
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(if (not (equal? level *level*))
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(warn "format revision level disagreement - try recompiling"
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`(file: ,level current: ,*level*)))
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(let* ((open-names (restore))
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(access-names (restore))
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(p (make-package (lambda () (map name->structure open-names))
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(lambda ()
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(map (lambda (name)
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(cons name
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(name->structure name)))
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access-names))
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#f #f filename '()
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#f ;uid
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#f))) ;name
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(let loop ()
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(let ((uid (restore)))
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(if (not (eq? uid '-))
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(let ((qname+type (restore)))
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(table-set! table uid (reference->location qname+type p))
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(loop)))))
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(let-fluid $restore-index (lambda (id define?)
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(table-ref table id))
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(lambda ()
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(let ((templates (restore)))
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(for-each (lambda (template)
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(if (not (template? template))
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(error "lossage" template))
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(invoke-closure (make-closure template
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(package-uid p))))
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templates))))
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p)))))
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(define (reference->location qname+type p)
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(let* ((compile-time-type (or (cdr qname+type) usual-variable-type))
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(name (qualified->name (car qname+type) p))
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(binding (package-lookup p name)))
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(if (pair? binding)
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(let ((type (binding-type binding)))
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(if (not (equal? type compile-time-type))
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(warn "type inconsistency"
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`(compile time: ,compile-time-type)
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`(load time: ,type)))
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(cdr binding))
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(package-define! p name compile-time-type))))
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