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| 1 | ;; @file
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| 2 | ; innotek Portable Runtime - ASMAtomicBitToggle().
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| 3 | ;
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| 4 |
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| 5 | ;
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| 6 | ; Copyright (C) 2006-2007 innotek GmbH
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| 7 | ;
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| 8 | ; This file is part of VirtualBox Open Source Edition (OSE), as
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| 9 | ; available from http://www.virtualbox.org. This file is free software;
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| 10 | ; you can redistribute it and/or modify it under the terms of the GNU
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| 11 | ; General Public License as published by the Free Software Foundation,
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| 12 | ; in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
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| 13 | ; distribution. VirtualBox OSE is distributed in the hope that it will
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| 14 | ; be useful, but WITHOUT ANY WARRANTY of any kind.
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| 15 | ;
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| 16 | ; If you received this file as part of a commercial VirtualBox
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| 17 | ; distribution, then only the terms of your commercial VirtualBox
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| 18 | ; license agreement apply instead of the previous paragraph.
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| 19 | ;
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| 20 |
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| 21 |
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| 22 | ;*******************************************************************************
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| 23 | ;* Header Files *
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| 24 | ;*******************************************************************************
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| 25 | %include "iprt/asmdefs.mac"
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| 26 |
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| 27 | BEGINCODE
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| 28 |
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| 29 | ;;
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| 30 | ; Atomically toggles a bit in a bitmap.
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| 31 | ;
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| 32 | ; @param rcx pvBitmap Pointer to the bitmap.
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| 33 | ; @param edx iBit The bit to test and set.
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| 34 | BEGINPROC_EXPORTED ASMAtomicBitToggle
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| 35 | lock btc [rcx], edx
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| 36 | ret
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| 37 | ENDPROC ASMAtomicBitToggle
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| 38 |
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