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front.ss
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front.ss
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"front.ss"
;;; front.ss
;;; Copyright 1984-2017 Cisco Systems, Inc.
;;;
;;; Licensed under the Apache License, Version 2.0 (the "License");
;;; you may not use this file except in compliance with the License.
;;; You may obtain a copy of the License at
;;;
;;; http://www.apache.org/licenses/LICENSE-2.0
;;;
;;; Unless required by applicable law or agreed to in writing, software
;;; distributed under the License is distributed on an "AS IS" BASIS,
;;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
;;; See the License for the specific language governing permissions and
;;; limitations under the License.
(define-who make-parameter
(case-lambda
[(init guard) (#2%make-parameter init guard)]
[(v) (#2%make-parameter v)]))
(when-feature pthreads
(let ()
(define allocate-thread-parameter
(let ()
(define free-list '()) ; list of pairs w/ index as car
(define index-guardian (make-guardian))
(lambda (initval)
(with-tc-mutex
(let ([index
(or (index-guardian)
(and (not (null? free-list))
(let ([index (car free-list)])
(set! free-list (cdr free-list))
index))
(let* ([n (vector-length ($tc-field 'parameters ($tc)))]
[m (fx* (fx+ n 1) 2)])
(for-each
(lambda (thread)
(let ([tc ($thread-tc thread)])
(let ([old ($tc-field 'parameters tc)]
[new (make-vector m)])
(do ([i (fx- n 1) (fx- i 1)])
((fx< i 0))
(vector-set! new i (vector-ref old i)))
($tc-field 'parameters tc new))))
($thread-list))
(set! free-list
(do ([i (fx- m 1) (fx- i 1)]
[ls free-list (cons (list i) ls)])
((fx= i n) ls)))
(list n)))])
(let loop ()
(let ([index (index-guardian)])
(when index
(for-each
(lambda (thread)
(vector-set!
($tc-field 'parameters ($thread-tc thread))
(car index)
0))
($thread-list))
(set! free-list (cons index free-list))
(loop))))
(for-each
(lambda (thread)
(vector-set!
($tc-field 'parameters ($thread-tc thread))
(car index)
initval))
($thread-list))
(index-guardian index)
index)))))
(define set-thread-parameter!
(lambda (index value)
(with-tc-mutex
(vector-set! ($tc-field 'parameters ($tc)) (car index) value))))
(set-who! make-thread-parameter
(case-lambda
[(init guard)
(unless (procedure? guard) ($oops who "~s is not a procedure" guard))
(let ([index (allocate-thread-parameter (guard init))])
(case-lambda
[() (vector-ref ($tc-field 'parameters ($tc)) (car index))]
[(u) (set-thread-parameter! index (guard u))]))]
[(init)
(let ([index (allocate-thread-parameter init)])
(case-lambda
[() (vector-ref ($tc-field 'parameters ($tc)) (car index))]
[(u) (set-thread-parameter! index u)]))]))
(set! $allocate-thread-parameter allocate-thread-parameter)
(set! $set-thread-parameter! set-thread-parameter!))
)
(define case-sensitive ($make-thread-parameter #t (lambda (x) (and x #t))))
(define compile-interpret-simple ($make-thread-parameter #t (lambda (x) (and x #t))))
(define generate-interrupt-trap ($make-thread-parameter #t (lambda (x) (and x #t))))
(define generate-allocation-counts ($make-thread-parameter #f (lambda (x) (and x #t))))
(define generate-instruction-counts ($make-thread-parameter #f (lambda (x) (and x #t))))
(define enable-cross-library-optimization ($make-thread-parameter #t (lambda (x) (and x #t))))
(define machine-type
(lambda ()
(constant machine-type-name)))
(define-who $fasl-target ($make-thread-parameter #f))
;;; package stubs are defined here in case we exclude certain packages
(eval-when (compile)
(define-syntax package-stub
(lambda (x)
(syntax-case x ()
[(_ name msg)
(identifier? #'name)
#'(package-stub (name name) msg)]
[(_ (name pub-name) msg)
#'(define name (lambda args ($oops 'pub-name msg)))])))
(define-syntax package-stubs
(lambda (x)
(syntax-case x ()
[(_ pkg name ...)
(with-syntax ([msg (format "~a package is not loaded" (datum pkg))])
#'(begin (package-stub name msg) ...))])))
)
(package-stubs cafe
waiter-prompt-and-read
waiter-write
waiter-prompt-string
new-cafe)
(package-stubs compile
($clear-dynamic-closure-counts compile)
($c-make-closure compile)
($c-make-code compile)
compile
($compile-backend compile)
compile-file
($compile-host-library compile)
compile-library
compile-port
compile-program
compile-script
compile-to-file
compile-to-port
compile-whole-library
compile-whole-program
($dynamic-closure-counts compile)
($loop-unroll-limit compile)
make-boot-file
($make-boot-file make-boot-file)
make-boot-header
($make-boot-header make-boot-header)
maybe-compile-file
maybe-compile-library
maybe-compile-program
($np-boot-code compile)
($np-compile compile)
($np-get-timers compile)
($np-last-pass compile)
($np-reset-timers! compile)
($np-tracer compile)
($optimize-closures compile)
($track-dynamic-closure-counts compile)
($track-static-closure-counts compile))
(package-stubs fasl
($fasl-bld-graph fasl-write)
($fasl-enter fasl-write)
($fasl-start fasl-write)
($fasl-table fasl-write)
($fasl-out fasl-write)
($fasl-wrf-graph fasl-write)
fasl-write
fasl-file)
(package-stubs inspect
inspect
inspect/object)
(package-stubs interpret
interpret)
(package-stubs pretty-print
pretty-format
pretty-line-length
pretty-one-line-limit
pretty-initial-indent
pretty-standard-indent
pretty-maximum-lines
pretty-print
pretty-file)
(package-stubs profile
profile-clear
profile-dump)
(package-stubs sc-expand
sc-expand
($syntax-dispatch sc-expand)
syntax-error
literal-identifier=?
bound-identifier=?
free-identifier=?
identifier?
generate-temporaries
syntax->datum
datum->syntax)
(package-stubs trace
trace-output-port
trace-print
($trace trace)
($untrace untrace)
($trace-closure trace))
(package-stubs compiler-support
$cp0
$cpvalid
$cpletrec
$cpcheck)
(package-stubs syntax-support
$uncprep)
(define current-eval
($make-thread-parameter
(lambda args ($oops 'eval "no current evaluator"))
(lambda (x)
(unless (procedure? x)
($oops 'current-eval "~s is not a procedure" x))
x)))
(define current-expand
($make-thread-parameter
(lambda args ($oops 'expand "no current expander"))
(lambda (x)
(unless (procedure? x)
($oops 'current-expand "~s is not a procedure" x))
x)))
(define eval
(case-lambda
[(x) ((current-eval) x)]
[(x env-spec) ((current-eval) x env-spec)]))
(define expand
(case-lambda
[(x) ((current-expand) x)]
[(x env-spec) ((current-expand) x env-spec)]
[(x env-spec records?) ((current-expand) x env-spec records?)]
[(x env-spec records? compiling-a-file) ((current-expand) x env-spec records? compiling-a-file)]
[(x env-spec records? compiling-a-file outfn) ((current-expand) x env-spec records? compiling-a-file outfn)]))
(define $compiler-is-loaded? #f)