74 lines
2.4 KiB
Scheme
74 lines
2.4 KiB
Scheme
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;;; foreign.ss
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;;; Copyright 1984-2017 Cisco Systems, Inc.
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;;;
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;;; Licensed under the Apache License, Version 2.0 (the "License");
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;;; you may not use this file except in compliance with the License.
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;;; You may obtain a copy of the License at
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;;;
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;;; http://www.apache.org/licenses/LICENSE-2.0
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;;;
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;;; Unless required by applicable law or agreed to in writing, software
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;;; distributed under the License is distributed on an "AS IS" BASIS,
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;;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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;;; See the License for the specific language governing permissions and
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;;; limitations under the License.
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(let ()
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(define $foreign-address-name
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(foreign-procedure "(cs)foreign_address_name" (void*)
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string))
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(define $remove-foreign-entry
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(foreign-procedure "(cs)remove_foreign_entry"
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(string) scheme-object))
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(set! $foreign-entries
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(foreign-procedure "(cs)foreign_entries" ()
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scheme-object))
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(set! remove-foreign-entry
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(lambda (entry)
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(unless (string? entry)
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($oops 'remove-foreign-entry "~s is not a string" entry))
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(unless ($remove-foreign-entry entry)
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($oops 'remove-foreign-entry "no entry for ~s" entry))))
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(let ()
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(define lookup
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(foreign-procedure "(cs)lookup_foreign_entry" (string)
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void*))
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(set-who! foreign-entry?
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(lambda (str)
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(unless (string? str) ($oops who "~s is not a string" str))
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(if (eqv? (lookup str) 0) #f #t)))
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(set-who! foreign-entry
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(lambda (str)
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(unless (string? str) ($oops who "~s is not a string" str))
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(let ([x (lookup str)])
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(when (eqv? x 0) ($oops who "no entry for ~s" str))
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x))))
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(set-who! foreign-address-name
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(lambda (n)
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(define void*?
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(constant-case ptr-bits
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[(32) $integer-32?]
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[(64) $integer-64?]))
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(unless (void*? n) ($oops who "~s is not a valid address" n))
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($foreign-address-name n)))
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(set! load-shared-object
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(if (foreign-entry? "(cs)load_shared_object")
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(let ()
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(define lso
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(foreign-procedure "(cs)load_shared_object"
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(string)
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void))
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(lambda (x)
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(unless (or (string? x) (eq? x #f))
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($oops 'load-shared-object "invalid path ~s" x))
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(lso x)))
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(lambda args
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($oops 'load-shared-object "not supported"))))
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) ;let
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