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6536 | serge | 1 | /* |
2 | * Copyright (c) 1990 The Regents of the University of California. |
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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 are permitted |
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6 | * provided that the above copyright notice and this paragraph are |
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7 | * duplicated in all such forms and that any documentation, |
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8 | * advertising materials, and other materials related to such |
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9 | * distribution and use acknowledge that the software was developed |
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10 | * by the University of California, Berkeley. The name of the |
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11 | * University may not be used to endorse or promote products derived |
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12 | * from this software without specific prior written permission. |
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13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
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14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
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15 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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16 | */ |
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17 | |||
18 | /* |
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19 | FUNCTION |
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20 | < |
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21 | |||
22 | INDEX |
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23 | getc_unlocked |
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24 | INDEX |
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25 | _getc_unlocked_r |
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26 | |||
27 | SYNOPSIS |
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28 | #include |
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29 | int getc_unlocked(FILE *<[fp]>); |
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30 | |||
31 | #include |
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32 | int _getc_unlocked_r(FILE *<[fp]>); |
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33 | |||
34 | DESCRIPTION |
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35 | < |
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36 | < |
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37 | protected by flockfile() (or ftrylockfile()) and funlockfile(). These |
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38 | functions may safely be used in a multi-threaded program if and only |
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39 | if they are called while the invoking thread owns the ( FILE *) |
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40 | object, as is the case after a successful call to the flockfile() or |
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41 | ftrylockfile() functions. If threads are disabled, then |
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42 | < |
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43 | |||
44 | The <<_getc_unlocked_r>> function is simply the reentrant version of |
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45 | < |
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46 | argument: <[ptr]>. |
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47 | |||
48 | RETURNS |
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49 | See < |
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50 | |||
51 | PORTABILITY |
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52 | POSIX 1003.1 requires < |
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53 | implemented as a macro, so arguments should not have side-effects. |
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54 | |||
55 | Supporting OS subroutines required: < |
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56 | < |
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57 | |||
58 | #if defined(LIBC_SCCS) && !defined(lint) |
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59 | static char sccsid[] = "%W% (Berkeley) %G%"; |
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60 | #endif /* LIBC_SCCS and not lint */ |
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61 | |||
62 | #include <_ansi.h> |
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63 | #include |
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64 | |||
65 | /* |
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66 | * A subroutine version of the macro getc_unlocked. |
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67 | */ |
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68 | |||
69 | #undef getc_unlocked |
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70 | |||
71 | int |
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72 | _DEFUN(_getc_unlocked_r, (ptr, fp), |
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73 | struct _reent *ptr _AND |
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74 | register FILE *fp) |
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75 | { |
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76 | /* CHECK_INIT is called (eventually) by __srefill_r. */ |
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77 | |||
78 | return __sgetc_r (ptr, fp); |
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79 | } |
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80 | |||
81 | #ifndef _REENT_ONLY |
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82 | |||
83 | int |
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84 | _DEFUN(getc_unlocked, (fp), |
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85 | register FILE *fp) |
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86 | { |
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87 | return __sgetc_r (_REENT, fp); |
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88 | } |
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89 | |||
90 | #endif /* !_REENT_ONLY */ |