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author | Yang Zhang <yang.z.zhang@intel.com> | 2015-08-28 09:58:54 +0800 |
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committer | Yang Zhang <yang.z.zhang@intel.com> | 2015-09-01 12:44:00 +0800 |
commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/roms/openbios/forth/packages/deblocker.fs | |
parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/roms/openbios/forth/packages/deblocker.fs')
-rw-r--r-- | qemu/roms/openbios/forth/packages/deblocker.fs | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/qemu/roms/openbios/forth/packages/deblocker.fs b/qemu/roms/openbios/forth/packages/deblocker.fs new file mode 100644 index 000000000..31a37d002 --- /dev/null +++ b/qemu/roms/openbios/forth/packages/deblocker.fs @@ -0,0 +1,63 @@ +\ tag: deblocker support package +\ +\ Copyright (C) 2003 Stefan Reinauer +\ +\ See the file "COPYING" for further information about +\ the copyright and warranty status of this work. +\ + +" /packages" find-device + +\ The deblocker package makes it easy to implement byte-oriented device +\ methods, using the block-oriented or record-oriented methods defined by +\ devices such as disks or tapes. It provides a layer of buffering between +\ the high-level byte-oriented interface and the low-level block-oriented +\ interface. deblocker uses the max-transfer, block-size, read-blocks and +\ write-blocks methods of its parent. + +new-device + " deblocker" device-name + \ open ( -- flag ) + \ Prepares the package for subsequent use, allocating the buffers used + \ by the deblocking process based upon the values returned by the parent + \ instance's max-transfer and block-size methods. Returns -1 if the + \ operation succeeds, 0 otherwise. + : open ( -- flag ) + + ; + + \ close ( -- ) + \ Frees all resources that were allocated by open. + : close ( -- ) + ; + + \ read ( adr len -- actual ) + \ Reads at most len bytes from the device into the memory buffer + \ beginning at adr. Returns actual, the number of bytes actually + \ read, or 0 if the read operation failed. Uses the parent's read- + \ blocks method as necessary to satisfy the request, buffering any + \ unused bytes for the next request. + + : read ( adr len -- actual ) + ; + + \ Writes at most len bytes from the device into the memory buffer + \ beginning at adr. Returns actual, the number of bytes actually + \ read, or 0 if the write operation failed. Uses the parent's write- + \ blocks method as necessary to satisfy the request, buffering any + \ unused bytes for the next request. + + : write ( adr len -- actual ) + ; + + \ Sets the device position at which the next read or write will take + \ place. The position is specified by the 64-bit number x.position. + \ Returns 0 if the operation succeeds or -1 if it fails. + + : seek ( x.position -- flag ) + ; + +finish-device + +\ clean up afterwards +device-end |