The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/sys/_types.h

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    1 /*-
    2  * Copyright (c) 2002 Mike Barcroft <mike@FreeBSD.org>
    3  * All rights reserved.
    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  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD: releng/9.1/sys/sys/_types.h 223710 2011-07-01 12:13:48Z jonathan $
   27  */
   28 
   29 #ifndef _SYS__TYPES_H_
   30 #define _SYS__TYPES_H_
   31 
   32 #include <sys/cdefs.h>
   33 #include <machine/_types.h>
   34 
   35 /*
   36  * Standard type definitions.
   37  */
   38 typedef __uint32_t      __blksize_t;    /* file block size */
   39 typedef __int64_t       __blkcnt_t;     /* file block count */
   40 typedef __int32_t       __clockid_t;    /* clock_gettime()... */
   41 typedef __uint64_t      __cap_rights_t; /* capability rights */
   42 typedef __uint32_t      __fflags_t;     /* file flags */
   43 typedef __uint64_t      __fsblkcnt_t;
   44 typedef __uint64_t      __fsfilcnt_t;
   45 typedef __uint32_t      __gid_t;
   46 typedef __int64_t       __id_t;         /* can hold a gid_t, pid_t, or uid_t */
   47 typedef __uint32_t      __ino_t;        /* inode number */
   48 typedef long            __key_t;        /* IPC key (for Sys V IPC) */
   49 typedef __int32_t       __lwpid_t;      /* Thread ID (a.k.a. LWP) */
   50 typedef __uint16_t      __mode_t;       /* permissions */
   51 typedef int             __accmode_t;    /* access permissions */
   52 typedef int             __nl_item;
   53 typedef __uint16_t      __nlink_t;      /* link count */
   54 typedef __int64_t       __off_t;        /* file offset */
   55 typedef __int32_t       __pid_t;        /* process [group] */
   56 typedef __int64_t       __rlim_t;       /* resource limit - intentionally */
   57                                         /* signed, because of legacy code */
   58                                         /* that uses -1 for RLIM_INFINITY */
   59 typedef __uint8_t       __sa_family_t;
   60 typedef __uint32_t      __socklen_t;
   61 typedef long            __suseconds_t;  /* microseconds (signed) */
   62 typedef struct __timer  *__timer_t;     /* timer_gettime()... */
   63 typedef struct __mq     *__mqd_t;       /* mq_open()... */
   64 typedef __uint32_t      __uid_t;
   65 typedef unsigned int    __useconds_t;   /* microseconds (unsigned) */
   66 typedef int             __cpuwhich_t;   /* which parameter for cpuset. */
   67 typedef int             __cpulevel_t;   /* level parameter for cpuset. */
   68 typedef int             __cpusetid_t;   /* cpuset identifier. */
   69 
   70 /*
   71  * Unusual type definitions.
   72  */
   73 /*
   74  * rune_t is declared to be an ``int'' instead of the more natural
   75  * ``unsigned long'' or ``long''.  Two things are happening here.  It is not
   76  * unsigned so that EOF (-1) can be naturally assigned to it and used.  Also,
   77  * it looks like 10646 will be a 31 bit standard.  This means that if your
   78  * ints cannot hold 32 bits, you will be in trouble.  The reason an int was
   79  * chosen over a long is that the is*() and to*() routines take ints (says
   80  * ANSI C), but they use __ct_rune_t instead of int.
   81  *
   82  * NOTE: rune_t is not covered by ANSI nor other standards, and should not
   83  * be instantiated outside of lib/libc/locale.  Use wchar_t.  wchar_t and
   84  * rune_t must be the same type.  Also, wint_t must be no narrower than
   85  * wchar_t, and should be able to hold all members of the largest
   86  * character set plus one extra value (WEOF), and must be at least 16 bits.
   87  */
   88 typedef int             __ct_rune_t;    /* arg type for ctype funcs */
   89 typedef __ct_rune_t     __rune_t;       /* rune_t (see above) */
   90 typedef __ct_rune_t     __wchar_t;      /* wchar_t (see above) */
   91 typedef __ct_rune_t     __wint_t;       /* wint_t (see above) */
   92 
   93 typedef __uint32_t      __dev_t;        /* device number */
   94 
   95 typedef __uint32_t      __fixpt_t;      /* fixed point number */
   96 
   97 /*
   98  * mbstate_t is an opaque object to keep conversion state during multibyte
   99  * stream conversions.
  100  */
  101 typedef union {
  102         char            __mbstate8[128];
  103         __int64_t       _mbstateL;      /* for alignment */
  104 } __mbstate_t;
  105 
  106 #endif /* !_SYS__TYPES_H_ */

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