root/kern/include/kern/types.h

INCLUDED FROM

   1 /*
   2  * Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008
   3  *      The President and Fellows of Harvard College.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  30 #ifndef _KERN_TYPES_H_
  31 #define _KERN_TYPES_H_
  33 /* Get machine-dependent types. */
  34 #include <kern/machine/types.h>
  36 /*
  37  * Machine-independent types visible to user level.
  38  *
  39  * Define everything with leading underscores to avoid polluting the C
  40  * namespace for applications.
  41  *
  42  * The C standard (and additionally the POSIX standard) define rules
  43  * for what families of symbol names are allowed to be used by
  44  * application programmers, and what families of symbol names can be
  45  * defined by various standard header files. The C library needs to
  46  * conform to those rules, to the extent reasonably practical, to make
  47  * sure that application code compiles and behaves as intended.
  48  *
  49  * Many of the C library's headers need to use one or more of these
  50  * types in places where the "real" name of the type cannot be
  51  * exposed, or expose the names of some of these types and not others.
  52  * (For example, <string.h> is supposed to define size_t, but is not
  53  * supposed to also define e.g. pid_t.)
  54  *
  55  * For this reason we define everything with two underscores in front
  56  * of it; in C such symbol names are reserved for the implementation,
  57  * which we are, so this file can be included anywhere in any libc
  58  * header without causing namespace problems. The "real" type names
  59  * are defined with an additional layer of typedefs; this happens for
  60  * the kernel in <types.h> and for userland in (mostly) <sys/types.h>
  61  * and also various other places as per relevant standards.
  62  */
  64 typedef __u32 __blkcnt_t;  /* Count of blocks */
  65 typedef __u32 __blksize_t; /* Size of an I/O block */
  66 typedef __u64 __counter_t; /* Event counter */
  67 typedef __u32 __daddr_t;   /* Disk block number */
  68 typedef __u32 __dev_t;     /* Hardware device ID */
  69 typedef __u32 __fsid_t;    /* Filesystem ID */
  70 typedef __i32 __gid_t;     /* Group ID */
  71 typedef __u32 __in_addr_t; /* Internet address */
  72 typedef __u32 __in_port_t; /* Internet port number */
  73 typedef __u32 __ino_t;     /* Inode number */
  74 typedef __u32 __mode_t;    /* File access mode */
  75 typedef __u16 __nlink_t;   /* Number of links (intentionally only 16 bits) */
  76 typedef __i64 __off_t;     /* Offset within file */
  77 typedef __i32 __pid_t;     /* Process ID */
  78 typedef __u64 __rlim_t;    /* Resource limit quantity */
  79 typedef __u8 __sa_family_t;/* Socket address family */
  80 typedef __i64 __time_t;    /* Time in seconds */
  81 typedef __i32 __uid_t;     /* User ID */
  83 typedef int __nfds_t;    /* Number of file handles */
  84 typedef int __socklen_t;   /* Socket-related length */
  86 /* See note in <stdarg.h> */
  87 #ifdef __GNUC__
  88 typedef __builtin_va_list __va_list;
  89 #endif
  92 #endif /* _KERN_TYPES_H_ */