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6536 | serge | 1 | /* |
2 | * Copyright (c) 2014 Red Hat, Inc. |
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3 | * 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 | * |
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14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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15 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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18 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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24 | * SUCH DAMAGE. |
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25 | */ |
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26 | /* |
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27 | FUNCTION |
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28 | <<__fsetlocking>>---set or query locking mode on FILE stream |
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29 | |||
30 | INDEX |
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31 | __fsetlocking |
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32 | |||
33 | ANSI_SYNOPSIS |
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34 | #include |
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35 | #include |
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36 | int __fsetlocking(FILE *<[fp]>, int <[type]>); |
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37 | |||
38 | DESCRIPTION |
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39 | This function sets how the stdio functions handle locking of FILE <[fp]>. |
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40 | The following values describe <[type]>: |
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41 | |||
42 | < |
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43 | automatically lock and unlock the stream. |
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44 | |||
45 | < |
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46 | is disabled. Applications which set this take all responsibility for file |
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47 | locking themselves. |
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48 | |||
49 | < |
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50 | |||
51 | RETURNS |
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52 | <<__fsetlocking>> returns the current locking mode of <[fp]>. |
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53 | |||
54 | PORTABILITY |
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55 | This function originates from Solaris and is also provided by GNU libc. |
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56 | |||
57 | No supporting OS subroutines are required. |
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58 | */ |
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59 | |||
60 | #ifndef __rtems__ |
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61 | |||
62 | #include <_ansi.h> |
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63 | #include |
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64 | #include |
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65 | #include "local.h" |
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66 | |||
67 | int |
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68 | _DEFUN(__fsetlocking, (fp, type), |
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69 | FILE * fp _AND |
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70 | int type) |
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71 | { |
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72 | int result; |
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73 | CHECK_INIT(_REENT, fp); |
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74 | result = (fp->_flags2 & __SNLK) ? FSETLOCKING_BYCALLER : FSETLOCKING_INTERNAL; |
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75 | switch (type) |
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76 | { |
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77 | case FSETLOCKING_BYCALLER: |
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78 | fp->_flags2 |= __SNLK; |
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79 | break; |
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80 | case FSETLOCKING_INTERNAL: |
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81 | fp->_flags2 &= ~__SNLK; |
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82 | break; |
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83 | case FSETLOCKING_QUERY: |
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84 | default: |
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85 | break; |
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86 | } |
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87 | return result; |
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88 | } |
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89 | |||
90 | #endif /* __rtems__ */[fp]><__fsetlocking> |