TYPES(5)                    BSD File Formats Manual                   TYPES(5)

NAME
     types -- system data types

SYNOPSIS
     ##include <>

DESCRIPTION
     The file sys/types.h contains the defined data types used in the kernel
     (most are used through out the system).

     #ifndef TYPESH
     #define TYPESH

     typedef short   devt;
     #ifndef POSIXSOURCE
                                             /* major part of a device */
     #define major(x)        ((int)(((unsigned)(x)>>8)&0377))
                                             /* minor part of a device */
     #define minor(x)        ((int)((x)&0377))
                                             /* make a device number */
     #define makedev(x,y)    ((devt)(((x)<<8)  (y)))
     #endif

     typedef unsigned char   uchar;
     typedef unsigned short  ushort;
     typedef unsigned int    uint;
     typedef unsigned long   ulong;
     typedef unsigned short  ushort;         /* Sys V compatibility */

     #if !defined(ANSISOURCE) && !defined(POSIXCSOURCE)
     #include 
     #endif

     #ifdef  CLOCKT
     typedef CLOCKT       clockt;
     #undef  CLOCKT
     #endif

     #ifdef  SIZET
     typedef SIZET        sizet;
     #undef  SIZET
     #endif

     #ifdef  TIMET
     typedef TIMET        timet;
     #undef  TIMET
     #endif

     #ifndef POSIXSOURCE
     typedef struct  uquad { unsigned long val[2]; } uquad;
     typedef struct  quad { long val[2]; } quad;
     #endif
     typedef long *  qaddrt;        /* should be typedef quad * qaddrt; */

     typedef long    daddrt;
     typedef char *  caddrt;
     typedef ulong  inot;
     typedef long    swblkt;
     typedef long    segszt;
     typedef long    offt;
     typedef ushort uidt;
     typedef ushort gidt;
     typedef short   pidt;
     typedef ushort nlinkt;
     typedef ushort modet;
     typedef ulong  fixptt;

     #ifndef POSIXSOURCE
     #define NBY    8               /* number of bits in a byte */

     /*
      * Select uses bit masks of file descriptors in longs.  These macros
      * manipulate such bit fields (the filesystem macros use chars).
      * FDSETSIZE may be defined by the user, but the default here should
      * be >= NOFILE (param.h).
      */
     #ifndef FDSETSIZE
     #define FDSETSIZE      1024
     #endif

     typedef long    fdmask;
     #define NFDBITS (sizeof(fdmask) * NBY)        /* bits per mask */

     #ifndef howmany
     #define howmany(x, y)   (((x)]((y)-1))/(y))
     #endif

     typedef struct fdset {
             fdmask fdsbits[howmany(FDSETSIZE, NFDBITS)];
     } fdset;

     #define FDSET(n, p)    ((p)->fdsbits[(n)/NFDBITS] = (1 << ((n) % NFDBITS)))
     #define FDCLR(n, p)    ((p)->fdsbits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
     #define FDISET(n, p)  ((p)->fdsbits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
     #define FDCOPY(f, t)   bcopy(f, t, sizeof(*(f)))
     #define FDZERO(p)      bzero((char *)(p), sizeof(*(p)))

     #endif /* !POSIXSOURCE */
     #endif /* !TYPESH */

SEE ALSO
     fs(5), time(3), lseek(2), adb(1)

HISTORY
     A types file appeared in Version 7 AT&T UNIX.

Darwin                          AUGUST 2, 2001                          Darwin