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Annotation of ntddk/src/network/streams/inc/sys/sysmacro.h, revision 1.1

1.1     ! root        1: /*++
        !             2: 
        !             3: Copyright (c) 1991  Microsoft Corporation
        !             4: 
        !             5: Module Name:
        !             6: 
        !             7:    sysmacro.h
        !             8: 
        !             9: Abstract:
        !            10: 
        !            11:    This header file defines the device number macros for STREAMS drivers
        !            12:    and modules.  It is derived from the SpiderSTREAMS source, sysmacros.h.
        !            13: 
        !            14: Author:
        !            15: 
        !            16:    Eric Chin            November 1, 1991
        !            17: 
        !            18: Revision History:
        !            19: 
        !            20: --*/
        !            21: 
        !            22: /* @(#)sysmacros.h     1.3 (Spider) 91/07/01 */
        !            23: 
        !            24: #ifndef _SYSMACRO_
        !            25: #define _SYSMACRO_
        !            26: 
        !            27: 
        !            28: 
        !            29: /*
        !            30:  * Selectors and Constructor for Device Numbers
        !            31:  *
        !            32:  * On NT, dev_t is an unsigned long, not an unsigned short (ref:
        !            33:  * \nt\public\sdk\inc\sys\posix\sys\types.h).  Hence, minor device
        !            34:  * numbers are defined to be 16 bits wide, giving 65536 possible
        !            35:  * minor device numbers.
        !            36:  *
        !            37:  */
        !            38: #define major(x)            (int) ((unsigned) (x) >> 16)
        !            39: #define minor(x)            (int) ((x) & 0xffff)
        !            40: #define makedev(x, y)       (dev_t) (((x) << 16) | (y))
        !            41: 
        !            42: #define getmajor(x)         major((x))
        !            43: #define getminor(x)         minor((x))
        !            44: #define makedevice(x, y)    makedev((x), (y))
        !            45: 
        !            46: #define CLONEDEV            0xffff
        !            47: 
        !            48: 
        !            49: #ifndef min
        !            50: #define min(a, b)           ((a) > (b) ? (b) : (a))
        !            51: #endif
        !            52: 
        !            53: #ifndef max
        !            54: #define max(a, b)           ((a) < (b) ? (b) : (a))
        !            55: #endif
        !            56: 
        !            57: #endif // _SYSMACRO_

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