--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/JavaNativeMemory.st Fri Aug 19 08:58:19 2011 +0000
@@ -0,0 +1,213 @@
+"
+ COPYRIGHT (c) 1996-2011 by Claus Gittinger
+ COPYRIGHT (c) 2010-2011 by Jan Vrany, Jan Kurs and Marcel Hlopko
+ SWING Research Group, Czech Technical University in Prague
+
+ Parts of the code written by Claus Gittinger are under following
+ license:
+
+ This software is furnished under a license and may be used
+ only in accordance with the terms of that license and with the
+ inclusion of the above copyright notice. This software may not
+ be provided or otherwise made available to, or used by, any
+ other person. No title to or ownership of the software is
+ hereby transferred.
+
+ Parts of the code written at SWING Reasearch Group [1] are MIT licensed:
+
+ Permission is hereby granted, free of charge, to any person
+ obtaining a copy of this software and associated documentation
+ files (the 'Software'), to deal in the Software without
+ restriction, including without limitation the rights to use,
+ copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the
+ Software is furnished to do so, subject to the following
+ conditions:
+
+ The above copyright notice and this permission notice shall be
+ included in all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ OTHER DEALINGS IN THE SOFTWARE.
+
+ [1] Code written at SWING Research Group contain a signature
+ of one of the above copright owners.
+"
+"{ Package: 'stx:libjava' }"
+
+Object subclass:#JavaNativeMemory
+ instanceVariableNames:'addresses chunks'
+ classVariableNames:''
+ poolDictionaries:''
+ category:'Languages-Java-Support'
+!
+
+!JavaNativeMemory class methodsFor:'documentation'!
+
+copyright
+"
+ COPYRIGHT (c) 1996-2011 by Claus Gittinger
+ COPYRIGHT (c) 2010-2011 by Jan Vrany, Jan Kurs and Marcel Hlopko
+ SWING Research Group, Czech Technical University in Prague
+
+ Parts of the code written by Claus Gittinger are under following
+ license:
+
+ This software is furnished under a license and may be used
+ only in accordance with the terms of that license and with the
+ inclusion of the above copyright notice. This software may not
+ be provided or otherwise made available to, or used by, any
+ other person. No title to or ownership of the software is
+ hereby transferred.
+
+ Parts of the code written at SWING Reasearch Group [1] are MIT licensed:
+
+ Permission is hereby granted, free of charge, to any person
+ obtaining a copy of this software and associated documentation
+ files (the 'Software'), to deal in the Software without
+ restriction, including without limitation the rights to use,
+ copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the
+ Software is furnished to do so, subject to the following
+ conditions:
+
+ The above copyright notice and this permission notice shall be
+ included in all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ OTHER DEALINGS IN THE SOFTWARE.
+
+ [1] Code written at SWING Research Group contain a signature
+ of one of the above copright owners.
+
+"
+! !
+
+!JavaNativeMemory class methodsFor:'instance creation'!
+
+new
+ "return an initialized instance"
+
+ ^ self basicNew initialize.
+! !
+
+!JavaNativeMemory methodsFor:'accessing'!
+
+byteAt:address
+ |i chunk offset|
+
+ addresses size == 0 ifTrue:[
+ self errorAccessingUnallocatedMemory:address
+ ].
+ i := 1.
+ [
+ i <= (addresses size - 1) and:[ (addresses at:i + 1) <= address ]
+ ] whileTrue:[ i := i + 1 ].
+ offset := address - (addresses at:i).
+ chunk := chunks at:i.
+ (offset > chunk size) ifTrue:[
+ self errorAccessingUnallocatedMemory:address
+ ].
+ ^chunk at: offset + 1
+
+ "Created: / 09-12-2010 / 17:32:45 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+!
+
+longAt:address put:value
+ |i chunk offset|
+
+ addresses size == 0 ifTrue:[
+ self errorAccessingUnallocatedMemory:address
+ ].
+ i := 1.
+ [
+ i <= (addresses size - 1) and:[ (addresses at:i + 1) <= address ]
+ ] whileTrue:[ i := i + 1 ].
+ offset := address - (addresses at:i).
+ chunk := chunks at:i.
+ (offset > chunk size) ifTrue:[
+ self errorAccessingUnallocatedMemory:address
+ ].
+ chunk longLongAt: offset + 1 put: value
+
+ "Created: / 09-12-2010 / 17:32:02 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+! !
+
+!JavaNativeMemory methodsFor:'allocation/deallocation'!
+
+free: address
+
+ "Frees the memory"
+
+ | index |
+ address = 0 ifTrue:[^self].
+
+ index := addresses
+ indexOf: address
+ ifAbsent:[self error:'Never allocated'].
+
+ (chunks at: index)
+ ifNil:[self error: 'Freed twice'].
+
+ chunks at: index put: nil.
+
+ "Created: / 07-12-2010 / 23:33:22 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+!
+
+malloc: size
+
+ "Allocate new chunk of memory, size bytes long"
+
+ | address |
+ self assert: addresses size == chunks size.
+ addresses size > 0
+ ifTrue: [address := addresses last + chunks last size ]
+ ifFalse:[address := 0].
+ address := address + (Random nextIntegerBetween: 128 and: 256).
+
+ addresses add: address.
+ chunks add: (ByteArray new: size).
+
+ ^address
+
+ "Created: / 07-12-2010 / 23:25:09 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+! !
+
+!JavaNativeMemory methodsFor:'error reporting'!
+
+errorAccessingUnallocatedMemory:arg
+ self shouldImplement
+
+ "Created: / 07-12-2010 / 23:40:01 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+! !
+
+!JavaNativeMemory methodsFor:'initialization'!
+
+initialize
+ "Invoked when a new instance is created."
+
+ addresses := OrderedCollection new.
+ chunks := OrderedCollection new.
+
+ "/ super initialize. -- commented since inherited method does nothing
+
+ "Modified: / 07-12-2010 / 23:09:04 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+! !
+
+!JavaNativeMemory class methodsFor:'documentation'!
+
+version_SVN
+ ^ '$Id$'
+! !
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