! :folding=indent:collapseFolds=1:

! $Id$
!
! Copyright (C) 2004 Slava Pestov.
! 
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! modification, are permitted provided that the following conditions are met:
! 
! 1. Redistributions of source code must retain the above copyright notice,
!    this list of conditions and the following disclaimer.
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! 2. Redistributions in binary form must reproduce the above copyright notice,
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IN: win32-io-internals
USE: alien
USE: kernel
USE: lists
USE: math
USE: namespaces
USE: win32-api

: win32-init-stdio ( -- )
    INVALID_HANDLE_VALUE NULL NULL 1 CreateIoCompletionPort
    "completion-port" set ;

: get-access ( -- file-mode )
    0 "file-mode" get uncons >r 
    [ GENERIC_WRITE ] [ 0 ] ifte bitor r>
    [ GENERIC_READ ] [ 0 ] ifte bitor ;

: get-sharemode ( -- share-mode )
    FILE_SHARE_READ FILE_SHARE_WRITE bitor FILE_SHARE_DELETE bitor ;

: get-create ( -- creation-disposition )
    "file-mode" get uncons [
      [ OPEN_ALWAYS ] [ CREATE_ALWAYS ] ifte  
    ] [
      [ OPEN_EXISTING ] [ 0 ] ifte
    ] ifte ;

: win32-open-file ( file r w -- handle )
    [ 
        cons "file-mode" set
        get-access get-sharemode NULL get-create FILE_FLAG_OVERLAPPED NULL 
        CreateFile dup INVALID_HANDLE_VALUE = [ win32-throw-error ] when
        dup "completion-port" get NULL 1 CreateIoCompletionPort drop
    ] with-scope ;