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LibFFIType.class.st
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LibFFIType.class.st
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Class {
#name : #LibFFIType,
#superclass : #VMStructType,
#instVars : [
'type',
'size',
'alignment',
'elements',
'libFFI'
],
#pools : [
'LibFFIConstants'
],
#category : #'VMMaker-FFI'
}
{ #category : #translation }
LibFFIType class >> filteredInstVarNames [
"Eliminate the obvious simulation-only inst vars"
^ self allInstVarNames copyWithoutAll: #(libFFI)
]
{ #category : #'type constants' }
LibFFIType class >> instVarNamesAndTypesForTranslationDo: aBinaryBlock [
self filteredInstVarNames do:
[:ivn|
aBinaryBlock
value: ivn
value: (ivn caseOf: {
['size'] -> [#'size_t'].
['alignment'] -> [#'unsigned short'].
['type'] -> [#'unsigned short'].
['elements'] -> [#'struct _ffi_type **'].
} otherwise: [ self halt ])]
]
{ #category : #'type constants' }
LibFFIType class >> printTypedefOn: aStream [
"This is already defined in ffi.h"
]
{ #category : #'type constants' }
LibFFIType class >> structTypeName [
^ 'ffi_type'
]
{ #category : #'type constants' }
LibFFIType class >> type: aType size: aSize on: aLibFFI [
^ self new
type: aType;
size: aSize;
libFFI: aLibFFI;
yourself
]
{ #category : #accessing }
LibFFIType >> elements: aCollection [
elements := aCollection
]
{ #category : #testing }
LibFFIType >> fromSmalltalk: aNumber putInto: aCArrayAccessor [
<doNotGenerate>
[ type ]
caseOf: {
[ FFI_TYPE_SINT8 ] -> [ | intHolder |
intHolder := libFFI interpreter cCoerce: aCArrayAccessor to: #'int8_t *'.
intHolder at: 0 put: aNumber].
[ FFI_TYPE_SINT16 ] -> [ | intHolder |
intHolder := libFFI interpreter cCoerce: aCArrayAccessor to: #'int16_t *'.
intHolder at: 0 put: aNumber].
[ FFI_TYPE_SINT32 ] -> [ | intHolder |
intHolder := libFFI interpreter cCoerce: aCArrayAccessor to: #'int32_t *'.
intHolder at: 0 put: aNumber].
[ FFI_TYPE_SINT64 ] -> [ | intHolder |
intHolder := libFFI interpreter cCoerce: aCArrayAccessor to: #'int64_t *'.
intHolder at: 0 put: aNumber].
[ FFI_TYPE_UINT8 ] -> [ | intHolder |
intHolder := libFFI interpreter cCoerce: aCArrayAccessor to: #'uint8_t *'.
intHolder at: 0 put: aNumber].
[ FFI_TYPE_UINT16 ] -> [ | intHolder |
intHolder := libFFI interpreter cCoerce: aCArrayAccessor to: #'uint16_t *'.
intHolder at: 0 put: aNumber].
[ FFI_TYPE_UINT32 ] -> [ | intHolder |
intHolder := libFFI interpreter cCoerce: aCArrayAccessor to: #'uint32_t *'.
intHolder at: 0 put: aNumber].
[ FFI_TYPE_UINT64 ] -> [ | intHolder |
intHolder := libFFI interpreter cCoerce: aCArrayAccessor to: #'uint64_t *'.
intHolder at: 0 put: aNumber].
[ FFI_TYPE_POINTER ] -> [ | ptrHolder |
ptrHolder := libFFI interpreter cCoerce: aCArrayAccessor to: #'void **'.
ptrHolder at: 0 put: aNumber].
"Returning an Struct returns copy the value into the return buffer"
[ FFI_TYPE_STRUCT ] -> [
aCArrayAccessor object replaceFrom: 1 to: aNumber size with: aNumber startingAt: 1 ].
[ FFI_TYPE_FLOAT ] -> [ | floatHolder |
floatHolder := libFFI interpreter cCoerce: aCArrayAccessor to: #'float *'.
floatHolder at: 0 put: aNumber].
[ FFI_TYPE_DOUBLE ] -> [ | doubleHolder |
doubleHolder := libFFI interpreter cCoerce: aCArrayAccessor to: #'double *'.
doubleHolder at: 0 put: aNumber].
[ FFI_TYPE_VOID ] -> []
} otherwise: [ self halt ]
]
{ #category : #accessing }
LibFFIType >> libFFI: aLibFFI [
libFFI := aLibFFI
]
{ #category : #simulating }
LibFFIType >> marshallToSmalltalk: holder [
^ [ type ]
caseOf: {
[ FFI_TYPE_FLOAT ] -> [ libFFI interpreter objectMemory readFloat32AtPointer: holder ].
[ FFI_TYPE_DOUBLE ] -> [ libFFI interpreter objectMemory readFloat64AtPointer: holder ].
[ FFI_TYPE_POINTER ] -> [ (holder asPointerAccessor: libFFI interpreter objectMemory wordSize) at: 0 ].
[ FFI_TYPE_STRUCT ] -> [ holder object requestedMemoryCopy ].
[ FFI_TYPE_SINT8 ] -> [ (holder asIntAccessorOfSize: 1 signed: true) at: 0 ].
[ FFI_TYPE_UINT8 ] -> [ (holder asIntAccessorOfSize: 1 signed: false) at: 0 ].
[ FFI_TYPE_SINT16 ] -> [ (holder asIntAccessorOfSize: 2 signed: true) at: 0 ].
[ FFI_TYPE_UINT16 ] -> [ (holder asIntAccessorOfSize: 2 signed: false) at: 0 ].
[ FFI_TYPE_SINT32 ] -> [ (holder asIntAccessorOfSize: 4 signed: true) at: 0 ].
[ FFI_TYPE_UINT32 ] -> [ (holder asIntAccessorOfSize: 4 signed: false) at: 0 ].
[ FFI_TYPE_SINT64 ] -> [ (holder asIntAccessorOfSize: 8 signed: true) at: 0 ].
[ FFI_TYPE_UINT64 ] -> [ (holder asIntAccessorOfSize: 8 signed: false) at: 0 ].
}
otherwise: [ self halt ]
]
{ #category : #accessing }
LibFFIType >> size [
^ size
]
{ #category : #accessing }
LibFFIType >> size: anObject [
size := anObject
]
{ #category : #accessing }
LibFFIType >> type [
^ type
]
{ #category : #accessing }
LibFFIType >> type: anObject [
type := anObject
]