1 | /* |
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2 | * Copyright (c) 1982, 1986, 1993, 1994 |
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3 | * The Regents of the University of California. All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice, this list of conditions and the following disclaimer. |
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10 | * 2. Redistributions in binary form must reproduce the above copyright |
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11 | * notice, this list of conditions and the following disclaimer in the |
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12 | * documentation and/or other materials provided with the distribution. |
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13 | * 3. All advertising materials mentioning features or use of this software |
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14 | * must display the following acknowledgement: |
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15 | * This product includes software developed by the University of |
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16 | * California, Berkeley and its contributors. |
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17 | * 4. Neither the name of the University nor the names of its contributors |
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18 | * may be used to endorse or promote products derived from this software |
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19 | * without specific prior written permission. |
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20 | * |
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21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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31 | * SUCH DAMAGE. |
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32 | * |
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33 | * @(#)uio.h 8.5 (Berkeley) 2/22/94 |
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34 | * $Id$ |
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35 | */ |
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36 | |
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37 | #ifndef _SYS_UIO_H_ |
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38 | #define _SYS_UIO_H_ |
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39 | |
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40 | /* |
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41 | * XXX |
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42 | * iov_base should be a void *. |
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43 | */ |
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44 | struct iovec { |
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45 | char *iov_base; /* Base address. */ |
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46 | size_t iov_len; /* Length. */ |
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47 | }; |
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48 | |
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49 | enum uio_rw { UIO_READ, UIO_WRITE }; |
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50 | |
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51 | /* Segment flag values. */ |
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52 | enum uio_seg { |
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53 | UIO_USERSPACE, /* from user data space */ |
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54 | UIO_SYSSPACE, /* from system space */ |
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55 | UIO_USERISPACE, /* from user I space */ |
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56 | UIO_NOCOPY /* don't copy, already in object */ |
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57 | }; |
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58 | |
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59 | #ifdef KERNEL |
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60 | struct uio { |
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61 | struct iovec *uio_iov; |
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62 | int uio_iovcnt; |
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63 | off_t uio_offset; |
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64 | int uio_resid; |
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65 | enum uio_seg uio_segflg; |
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66 | enum uio_rw uio_rw; |
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67 | struct proc *uio_procp; |
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68 | }; |
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69 | |
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70 | /* |
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71 | * Limits |
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72 | */ |
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73 | #define UIO_MAXIOV 1024 /* max 1K of iov's */ |
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74 | #define UIO_SMALLIOV 8 /* 8 on stack, else malloc */ |
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75 | #endif /* KERNEL */ |
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76 | |
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77 | #ifdef KERNEL |
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78 | |
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79 | int uiomove __P((caddr_t, int, struct uio *)); |
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80 | |
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81 | #else /* !KERNEL */ |
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82 | |
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83 | #include <sys/cdefs.h> |
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84 | |
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85 | __BEGIN_DECLS |
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86 | ssize_t readv __P((int, const struct iovec *, int)); |
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87 | ssize_t writev __P((int, const struct iovec *, int)); |
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88 | __END_DECLS |
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89 | |
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90 | #endif /* KERNEL */ |
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91 | |
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92 | #endif /* !_SYS_UIO_H_ */ |
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