"

    Copyright (C) 2015-now Jan Vrany

    This code is not an open-source (yet). You may use this code

    for your own experiments and projects, given that:

    * all modification to the code will be sent to the

      original author for inclusion in future releases

    * this is not used in any commercial software

    This license is provisional and may (will) change in

    a future.

"

"{ Package: 'jv:llvm_s' }"

"{ NameSpace: Smalltalk }"

LLVMDisposableObject subclass:#LLVMExecutionEngine

	instanceVariableNames:'module'

	classVariableNames:'Initialized'

	poolDictionaries:''

	category:'LLVM-S-Core'

!

!LLVMExecutionEngine class methodsFor:'documentation'!

copyright

"

    Copyright (C) 2015-now Jan Vrany

    This code is not an open-source (yet). You may use this code

    for your own experiments and projects, given that:

    * all modification to the code will be sent to the

      original author for inclusion in future releases

    * this is not used in any commercial software

    This license is provisional and may (will) change in

    a future.

"

! !

!LLVMExecutionEngine class methodsFor:'initialization'!

initialize

    "Invoked at system start or when the class is dynamically loaded."

    Initialized := false

    "Modified: / 10-07-2015 / 14:43:27 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

initializeIfNotAlready

    Initialized ifFalse:[

        LLVM LinkInMCJIT.

        LLVM InitializeX86TargetInfo.

        LLVM InitializeX86Target.

        LLVM InitializeX86TargetMC.

        LLVM InitializeX86AsmPrinter.

        Initialized := true.

    ].

    "Created: / 10-07-2015 / 15:35:01 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 10-07-2015 / 22:34:25 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!LLVMExecutionEngine class methodsFor:'instance creation'!

newForModule: module

    | eePtr errmsgPtr |

    self assert: (module isKindOf: LLVMModule).

    self initializeIfNotAlready.

    eePtr := ExternalBytes new: ExternalBytes sizeofPointer.

    errmsgPtr := ExternalBytes new: ExternalBytes sizeofPointer.

    (LLVM CreateExecutionEngineForModule: eePtr _: module _: errmsgPtr) ifTrue:[ 

        | errmsg err |

        errmsg := errmsgPtr pointerAt: 1.

        err := Error newException.

        err messageText: 'Cannot create execution engine: ', errmsg copyCStringFromHeap.

        LLVM DisposeMessage: errmsg.

        err signal.

    ] ifFalse:[ 

        | ee |

        ee := eePtr pointerAt: 1.

        ee := LLVMExecutionEngine basicNew setAddress: ee address.

        ee setModule: module.      

        ee initialize.

        ^ ee

    ].

    "Created: / 10-07-2015 / 15:47:42 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 14-08-2015 / 13:08:16 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!LLVMExecutionEngine methodsFor:'accessing'!

addressOfFunction: anLLVMFunction

    ^ self addressOfFunctionNamed: anLLVMFunction name

    "Created: / 11-07-2015 / 11:26:30 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

addressOfFunctionNamed: name

    | addressAsInt |

    self assert: name isSingleByteString.

    addressAsInt := LLVM GetFunctionAddress: self  _: name.

    ^ ExternalAddress new setAddress: addressAsInt.

    "Created: / 10-07-2015 / 21:45:27 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

externalOfFunction: anLLVMFunction

    "Return reference to an LLVMFunction as an instance

     of ExternalFunction class. The class may be then

     called using #callWith:... method."

    ^ self externalOfFunctionNamed: anLLVMFunction name

    "Created: / 17-07-2015 / 11:36:32 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

externalOfFunctionNamed: name

    "Return reference to a function with givrn name as an instance

     of ExternalFunction class. The class may be then

     called using #callWith:... method."

    | code |

    code := self addressOfFunctionNamed: name.

    ^ ExternalFunction new 

            code: code;

            setModuleHandle: self.

    "Created: / 17-07-2015 / 11:38:25 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!LLVMExecutionEngine methodsFor:'initialization & release'!

dispose

    "Disposes the object. After that it cannot be used anymore"

    "/ Must unvalidate module because by default, MCJIT destructor

    "/ calls delete on its underalying module. 

    module unregisterForFinalization.

    Transcript showCR: '>>Module: ', module printString.            

    module setAddress: 0.

    LLVM DisposeExecutionEngine: self.

    self setAddress: 0.

    "Modified: / 17-07-2015 / 12:34:46 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

setModule: anLLVMModule

    module := anLLVMModule.

    "Created: / 17-07-2015 / 12:08:11 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

LLVMExecutionEngine initialize!