135 lines
4.2 KiB
Factor
135 lines
4.2 KiB
Factor
! :folding=indent:collapseFolds=1:
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! $Id$
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!
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! Copyright (C) 2004 Mackenzie Straight.
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!
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! Redistribution and use in source and binary forms, with or without
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! modification, are permitted provided that the following conditions are met:
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!
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! 1. Redistributions of source code must retain the above copyright notice,
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! this list of conditions and the following disclaimer.
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!
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! 2. Redistributions in binary form must reproduce the above copyright notice,
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! this list of conditions and the following disclaimer in the documentation
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! and/or other materials provided with the distribution.
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!
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! THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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! INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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! FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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! DEVELOPERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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! SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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! PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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! OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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! WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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! OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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! ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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IN: win32-io-internals
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USE: alien
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USE: errors
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USE: kernel
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USE: kernel-internals
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USE: lists
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USE: math
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USE: namespaces
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USE: prettyprint
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USE: vectors
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USE: win32-api
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SYMBOL: completion-port
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SYMBOL: io-queue
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SYMBOL: free-list
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SYMBOL: callbacks
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: handle-io-error ( -- )
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#! If a write or read call fails unexpectedly, throw an error.
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GetLastError [
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ERROR_IO_PENDING ERROR_HANDLE_EOF ERROR_SUCCESS
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] contains? [
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win32-throw-error
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] unless ;
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: win32-init-stdio ( -- )
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INVALID_HANDLE_VALUE NULL NULL 1 CreateIoCompletionPort
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completion-port set
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<namespace> [
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32 <vector> callbacks set
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f free-list set
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] extend io-queue set ;
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: add-completion ( handle -- )
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completion-port get NULL 1 CreateIoCompletionPort drop ;
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: get-access ( -- file-mode )
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"file-mode" get uncons
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GENERIC_WRITE 0 ? >r
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GENERIC_READ 0 ? r> bitor ;
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: get-sharemode ( -- share-mode )
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FILE_SHARE_READ FILE_SHARE_WRITE bitor ;
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: get-create ( -- creation-disposition )
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"file-mode" get uncons [
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[ OPEN_ALWAYS ] [ CREATE_ALWAYS ] ifte
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] [
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[ OPEN_EXISTING ] [ 0 ] ifte
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] ifte ;
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: win32-open-file ( file r w -- handle )
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[
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cons "file-mode" set
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get-access get-sharemode NULL get-create FILE_FLAG_OVERLAPPED NULL
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CreateFile dup INVALID_HANDLE_VALUE = [ win32-throw-error ] when
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dup add-completion
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] with-scope ;
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BEGIN-STRUCT: indirect-pointer
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FIELD: int value
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END-STRUCT
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: num-callbacks ( -- len )
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#! Returns the length of the callback vector.
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io-queue get [ callbacks get vector-length ] bind ;
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: set-callback-quot ( quot index -- )
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io-queue get [
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dup >r callbacks get vector-nth car swap cons
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r> callbacks get set-vector-nth
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] bind ;
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: new-overlapped ( -- index )
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#! Allocates and returns a new entry for the io queue.
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#! The new index in the callback vector is returned.
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io-queue get [
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"overlapped-ext" c-type [ "width" get ] bind imalloc <alien>
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dup num-callbacks swap
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set-overlapped-ext-user-data
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unit num-callbacks dup >r callbacks get set-vector-nth r>
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] bind ;
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: alloc-io-task ( quot -- overlapped )
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io-queue get [
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free-list get [
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uncons free-list set
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] [ new-overlapped ] ifte*
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[ set-callback-quot ] keep
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callbacks get vector-nth car
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] bind ;
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: get-io-callback ( index -- callback )
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#! Returns and frees the io queue entry at index.
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io-queue get [
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dup free-list [ cons ] change
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callbacks get vector-nth cdr
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] bind ;
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: win32-next-io-task ( -- quot )
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completion-port get <indirect-pointer> dup >r <indirect-pointer>
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<indirect-pointer> dup >r INFINITE GetQueuedCompletionStatus
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[ handle-io-error ] unless
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r> r> indirect-pointer-value swap indirect-pointer-value <alien>
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overlapped-ext-user-data get-io-callback call ;
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