133 lines
6.0 KiB
Scheme
133 lines
6.0 KiB
Scheme
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(define arena (invoke-static java.lang.foreign.Arena 'global))
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(define value->object
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(lambda (value type)
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(cond ((equal? type 'byte)
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(java.lang.Byte value))
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((equal? type 'short)
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(java.lang.Short value))
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((equal? type 'int)
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(java.lang.Integer value))
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((equal? type 'long)
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(java.lang.Long value))
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((equal? type 'float)
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(java.lang.Float value))
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((equal? type 'double)
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(java.lang.Double value))
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((equal? type 'char)
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(java.lang.Char value))
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(else value))))
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(define pffi-type->native-type
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(lambda (type)
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(cond
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((equal? type 'int8) (invoke (static-field java.lang.foreign.ValueLayout 'JAVA_INT) 'withByteAlignment 1))
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((equal? type 'uint8) (invoke (static-field java.lang.foreign.ValueLayout 'JAVA_INT) 'withByteAlignment 1))
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((equal? type 'int16) (invoke (static-field java.lang.foreign.ValueLayout 'JAVA_INT) 'withByteAlignment 2))
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((equal? type 'uint16) (invoke (static-field java.lang.foreign.ValueLayout 'JAVA_INT) 'withByteAlignment 2))
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((equal? type 'int32) (invoke (static-field java.lang.foreign.ValueLayout 'JAVA_INT) 'withByteAlignment 4))
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((equal? type 'uint32) (invoke (static-field java.lang.foreign.ValueLayout 'JAVA_INT) 'withByteAlignment 4))
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((equal? type 'int64) (invoke (static-field java.lang.foreign.ValueLayout 'JAVA_INT) 'withByteAlignment 8))
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((equal? type 'uint64) (invoke (static-field java.lang.foreign.ValueLayout 'JAVA_INT) 'withByteAlignment 8))
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((equal? type 'char) (static-field java.lang.foreign.ValueLayout 'JAVA_CHAR))
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((equal? type 'unsigned-char) (static-field java.lang.foreign.ValueLayout 'JAVA_CHAR))
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((equal? type 'short) (static-field java.lang.foreign.ValueLayout 'JAVA_SHORT))
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((equal? type 'unsigned-short) (static-field java.lang.foreign.ValueLayout 'JAVA_SHORT))
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((equal? type 'int) (static-field java.lang.foreign.ValueLayout 'JAVA_INT))
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((equal? type 'unsigned-int) (static-field java.lang.foreign.ValueLayout 'JAVA_INT))
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((equal? type 'long) (static-field java.lang.foreign.ValueLayout 'JAVA_LONG))
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((equal? type 'unsigned-long) (static-field java.lang.foreign.ValueLayout 'JAVA_LONG))
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((equal? type 'float) (static-field java.lang.foreign.ValueLayout 'JAVA_FLOAT))
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((equal? type 'double) (static-field java.lang.foreign.ValueLayout 'JAVA_DOUBLE))
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((equal? type 'pointer) (static-field java.lang.foreign.ValueLayout 'ADDRESS))
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((equal? type 'string) (static-field java.lang.foreign.ValueLayout 'ADDRESS))
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((equal? type 'void) (static-field java.lang.foreign.ValueLayout 'ADDRESS))
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(else (error "pffi-type->native-type -- No such pffi type" type)))))
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(define pffi-pointer?
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(lambda (object)
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(string=? (invoke (invoke object 'getClass) 'getName)
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"jdk.internal.foreign.NativeMemorySegmentImpl")))
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(define-syntax pffi-define
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(syntax-rules ()
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((pffi-define scheme-name shared-object c-name return-type argument-types)
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(define scheme-name
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(let* ((of-void (class-methods java.lang.foreign.FunctionDescriptor 'ofVoid))
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(of (class-methods java.lang.foreign.FunctionDescriptor 'of))
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(function-descriptor (if (equal? return-type 'void)
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(apply of-void (map pffi-type->native-type argument-types))
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(apply of (append (list (pffi-type->native-type return-type)) (map pffi-type->native-type argument-types)))))
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(method-handle (invoke (cdr (assoc 'linker shared-object))
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'downcallHandle
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(invoke (invoke (cdr (assoc 'lookup shared-object))
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'find
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(symbol->string c-name))
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'orElseThrow)
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function-descriptor)))
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(lambda vals
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(invoke method-handle 'invokeWithArguments (map value->object vals argument-types))))))))
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(define pffi-size-of
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(lambda (type)
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(invoke (pffi-type->native-type type) 'byteAlignment)))
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(define pffi-pointer-allocate
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(lambda (size)
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(invoke arena 'allocate size 1)))
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(define pffi-pointer-null
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(lambda ()
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(static-field java.lang.foreign.MemorySegment 'NULL)))
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(define pffi-string->pointer
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(lambda (string-content)
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(invoke arena 'allocateUtf8String string-content)))
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(define pffi-pointer->string
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(lambda (pointer)
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(invoke (invoke pointer 'reinterpret (static-field java.lang.Integer 'MAX_VALUE)) 'getUtf8String 0)))
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(define pffi-shared-object-load
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(lambda (header path)
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(let* ((library-file (make java.io.File path))
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(file-name (invoke library-file 'getName))
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(library-parent-folder (make java.io.File (invoke library-file 'getParent)))
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(absolute-path (string-append (invoke library-parent-folder 'getCanonicalPath)
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"/"
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file-name))
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;(set! arena (invoke-static java.lang.foreign.Arena 'ofConfined))
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(linker (invoke-static java.lang.foreign.Linker 'nativeLinker))
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(lookup (invoke-static java.lang.foreign.SymbolLookup
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'libraryLookup
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absolute-path
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arena)))
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(list (cons 'linker linker)
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(cons 'lookup lookup)))))
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(define pffi-pointer-free
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(lambda (pointer)
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#t))
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(define pffi-pointer-null?
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(lambda (pointer)
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(invoke pointer 'equals (pffi-pointer-null))))
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(define pffi-pointer-set!
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(lambda (pointer type offset value)
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(invoke pointer 'set (pffi-type->native-type type) offset value)))
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(define pffi-pointer-get
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(lambda (pointer type offset)
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(invoke pointer 'get (pffi-type->native-type type) offset)))
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(define pffi-pointer-deref
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(lambda (pointer)
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(invoke pointer 'get (static-field java.lang.foreign.ValueLayout 'ADDRESS) 0)))
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