156 lines
5.1 KiB
C
156 lines
5.1 KiB
C
/*
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* Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008
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* The President and Fellows of Harvard College.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _TYPES_H_
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#define _TYPES_H_
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/*
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* Master kernel header file.
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*
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* The model for the include files in the kernel is as follows:
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*
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* - Every source file includes this file, <types.h>, first.
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*
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* - Every other header file may assume this file has been
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* included, but should explicitly include any other headers it
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* uses to compile.
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*
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* - Some exceptions to the previous rules exist among the headers
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* exported to userland; those files should be included in the
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* kernel only indirectly via other, non-exported, headers, as
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* described in comments therein.
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*
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* - Every source or header file should include each file it
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* directly uses, even if that header is included via some other
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* header. This helps to prevent build failures when unrelated
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* dependencies are changed around.
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*
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* - As a matter of convention, the ordering of include files in
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* the base system is in order of subsystem dependence. That is,
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* lower-level code like <spinlock.h> should come before
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* higher-level code like <addrspace.h> or <vfs.h>. This
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* convention helps one to keep keep track of (and learn) the
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* organization of the system.
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*
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* The general ordering is as follows:
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* 1. <types.h>
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* 2. Kernel ABI definitions, e.g. <kern/errno.h>.
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* 3. Support code: <lib.h>, arrays, queues, etc.
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* 4. Low-level code: locks, trapframes, etc.
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* 5. Kernel subsystems: threads, VM, VFS, etc.
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* 6. System call layer, e.g. <elf.h>, <syscall.h>.
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*
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* Subsystem-private headers (the only extant example is
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* switchframe.h) and then kernel option headers generated by
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* config come last.
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*
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* There is no one perfect ordering, because the kernel is not
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* composed of perfectly nested layers. But for the most part
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* this principle produces a workable result.
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*/
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/* Get types visible to userland, both MI and MD. */
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#include <kern/types.h>
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/* Get machine-dependent types not visible to userland. */
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#include <machine/types.h>
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/*
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* Define userptr_t as a pointer to a one-byte struct, so it won't mix
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* with other pointers.
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*/
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struct __userptr { char _dummy; };
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typedef struct __userptr *userptr_t;
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typedef const struct __userptr *const_userptr_t;
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/*
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* Proper (non-underscore) names for the types that are exposed to
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* userland.
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*/
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/* machine-dependent from <kern/machine/types.h>... */
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typedef __i8 int8_t;
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typedef __i16 int16_t;
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typedef __i32 int32_t;
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typedef __i64 int64_t;
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typedef __u8 uint8_t;
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typedef __u16 uint16_t;
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typedef __u32 uint32_t;
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typedef __u64 uint64_t;
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typedef __size_t size_t;
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typedef __ssize_t ssize_t;
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typedef __intptr_t intptr_t;
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typedef __uintptr_t uintptr_t;
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typedef __ptrdiff_t ptrdiff_t;
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/* ...and machine-independent from <kern/types.h>. */
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typedef __blkcnt_t blkcnt_t;
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typedef __blksize_t blksize_t;
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typedef __daddr_t daddr_t;
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typedef __dev_t dev_t;
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typedef __fsid_t fsid_t;
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typedef __gid_t gid_t;
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typedef __in_addr_t in_addr_t;
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typedef __in_port_t in_port_t;
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typedef __ino_t ino_t;
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typedef __mode_t mode_t;
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typedef __nlink_t nlink_t;
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typedef __off_t off_t;
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typedef __pid_t pid_t;
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typedef __rlim_t rlim_t;
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typedef __sa_family_t sa_family_t;
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typedef __time_t time_t;
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typedef __uid_t uid_t;
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typedef __nfds_t nfds_t;
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typedef __socklen_t socklen_t;
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/*
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* Number of bits per byte.
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*/
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#define CHAR_BIT __CHAR_BIT
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/*
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* Null pointer.
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*/
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#define NULL ((void *)0)
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/*
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* Boolean.
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*/
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typedef _Bool bool;
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#define true 1
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#define false 0
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#endif /* _TYPES_H_ */
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