Remove extraneous bits
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1 changed files with 1 additions and 50 deletions
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@ -20,8 +20,7 @@
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MemoryAddress
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MemoryLayout
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MemorySegment
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ResourceScope
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SymbolLookup)))
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ResourceScope)))
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(defn stack-scope
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"Constructs a new scope for use only in this thread.
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@ -1090,51 +1089,3 @@
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fun#))))
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(s/fdef defcfn
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:args ::defcfn-args)
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#_:clj-kondo/ignore
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(comment
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;;; Prospective syntax for ffi
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;; This function has no out params, and no extra marshalling work, so it has no
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;; body
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(-> (defcfn strlen
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"Counts the number of bytes in a C String."
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"strlen" [::c-string] ::int)
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quote
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macroexpand-1)
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;; This function has an output parameter and requires some clojure code to
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;; translate the values from the c fn to something sensible in clojure.
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(defcfn some-func
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"Gets some output value"
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"someFunc" [::pointer] ::int
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native-func
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[]
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(with-open [scope (stack-scope)]
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(let [out-int (alloc-instance ::int scope)
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success? (zero? (native-func (address-of out-int)))]
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(if success?
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(deserialize-from ::int out-int)
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(throw (ex-info (getErrorString) {}))))))
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;; This function probably wouldn't actually get wrapped, since the cost of
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;; marshalling is greater than the speed boost of using an in-place sort. That
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;; said, this is a nice sample of what more complex marshalling looks like.
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(defcfn qsort
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"Quicksort implementation"
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"qsort"
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[::pointer ::long ::long (fn [::pointer ::pointer] ::int)]
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::void
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qsort-native
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[type comparator list]
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(with-open [scope (stack-scope)]
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(let [copied-list (alloc (* (count list) (size-of type)) scope)
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_ (dorun (map #(serialize-into %1 type %2 scope) list (seq-of type copied-list)))
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comp-fn (fn [addr1 addr2]
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(let [obj1 (deserialize-from type (slice-global addr1 (size-of type)))
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obj2 (deserialize-from type (slice-global addr2 (size-of type)))]
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(comparator obj1 obj2)))]
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(qsort-native copied-list (count list) (size-of type) comp-fn)
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(for [segment (seq-of type copied-list)]
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(deserialize-from type segment)))))
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)
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