| 1 | /* $Id: ioctl.h 4071 2007-08-07 17:07:59Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VBox L4/OSS audio - header for Linux IoCtls.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2007 innotek GmbH
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License as published by the Free Software Foundation,
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| 13 | * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
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| 14 | * distribution. VirtualBox OSE is distributed in the hope that it will
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| 15 | * be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | */
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| 17 |
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| 18 | #ifndef ___VBOX_L4_OSS_IOCTL
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| 19 | #define ___VBOX_L4_OSS_IOCTL
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| 20 |
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| 21 | #define IOCPARM_MASK 0x3fff /* parameters must be < 16383 bytes */
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| 22 | #define IOC_VOID 0U << 30 /* no parameters */
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| 23 | #define IOC_IN 1U << 30 /* copy out parameters */
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| 24 | #define IOC_OUT 2U << 30 /* copy in parameters */
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| 25 | #define IOC_INOUT (IOC_IN|IOC_OUT)
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| 26 | /* the 0x20000000 is so we can distinguish new ioctl's from old */
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| 27 | #define _IO(x,y) ((int)(IOC_VOID|(x<<8)|y))
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| 28 | #define _IOR(x,y,t) ((int)(IOC_OUT|((sizeof(t)&IOCPARM_MASK)<<16)|(x<<8)|y))
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| 29 | #define _IOW(x,y,t) ((int)(IOC_IN|((sizeof(t)&IOCPARM_MASK)<<16)|(x<<8)|y))
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| 30 | /* this should be _IORW, but stdio got there first */
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| 31 | #define _IOWR(x,y,t) ((int)(IOC_INOUT|((sizeof(t)&IOCPARM_MASK)<<16)|(x<<8)|y))
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| 32 | #define _IOC_SIZE(x) ((x>>16)&IOCPARM_MASK)
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| 33 | #define _IOC_DIR(x) (x & 0xf0000000)
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| 34 | #define _IOC_NONE IOC_VOID
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| 35 | #define _IOC_READ IOC_OUT
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| 36 | #define _IOC_WRITE IOC_IN
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| 37 |
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| 38 | #endif /* !___VBOX_L4_OSS_IOCTL */
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| 39 |
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