| Vishal Bhoj | 82c8071 | 2015-12-15 21:13:33 +0530 | [diff] [blame^] | 1 | /* $NetBSD: fileext.h,v 1.5 2003/07/18 21:46:41 nathanw Exp $ */
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| 2 |
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| 3 | /*-
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| 4 | * Copyright (c)2001 Citrus Project,
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| 5 | * All rights reserved.
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| 6 | *
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| 7 | * Redistribution and use in source and binary forms, with or without
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| 8 | * modification, are permitted provided that the following conditions
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| 9 | * are met:
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| 10 | * 1. Redistributions of source code must retain the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer.
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| 12 | * 2. Redistributions in binary form must reproduce the above copyright
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| 13 | * notice, this list of conditions and the following disclaimer in the
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| 14 | * documentation and/or other materials provided with the distribution.
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| 15 | *
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| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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| 17 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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| 20 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 21 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 22 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 24 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 25 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 26 | * SUCH DAMAGE.
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| 27 | *
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| 28 | * $Citrus$
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| 29 | */
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| 30 |
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| 31 | /*
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| 32 | * file extension
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| 33 | */
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| 34 | struct __sfileext {
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| 35 | struct __sbuf _ub; /* ungetc buffer */
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| 36 | struct wchar_io_data _wcio; /* wide char i/o status */
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| 37 | #ifdef _REENTRANT
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| 38 | mutex_t _lock; /* Lock for FLOCKFILE/FUNLOCKFILE */
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| 39 | cond_t _lockcond; /* Condition variable for signalling lock releases */
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| 40 | thr_t _lockowner; /* The thread currently holding the lock */
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| 41 | int _lockcount; /* Count of recursive locks */
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| 42 | int _lockinternal; /* Flag of whether the lock is held inside stdio */
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| 43 | int _lockcancelstate; /* Stashed cancellation state on internal lock */
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| 44 | #endif
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| 45 | };
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| 46 |
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| 47 | #define _EXT(fp) ((struct __sfileext *)(void *)((fp)->_ext._base))
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| 48 | #define _UB(fp) _EXT(fp)->_ub
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| 49 | #ifdef _REENTRANT
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| 50 | #define _LOCK(fp) (_EXT(fp)->_lock)
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| 51 | #define _LOCKCOND(fp) (_EXT(fp)->_lockcond)
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| 52 | #define _LOCKOWNER(fp) (_EXT(fp)->_lockowner)
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| 53 | #define _LOCKCOUNT(fp) (_EXT(fp)->_lockcount)
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| 54 | #define _LOCKINTERNAL(fp) (_EXT(fp)->_lockinternal)
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| 55 | #define _LOCKCANCELSTATE(fp) (_EXT(fp)->_lockcancelstate)
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| 56 | #define _FILEEXT_SETUP(f, fext) do { \
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| 57 | /* LINTED */(f)->_ext._base = (unsigned char *)(fext); \
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| 58 | mutex_init(&_LOCK(f), NULL); \
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| 59 | cond_init(&_LOCKCOND(f), 0, NULL); \
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| 60 | _LOCKOWNER(f) = NULL; \
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| 61 | _LOCKCOUNT(f) = 0; \
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| 62 | _LOCKINTERNAL(f) = 0; \
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| 63 | } while (/* LINTED */ 0)
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| 64 | #else
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| 65 | #define _FILEEXT_SETUP(f, fext) /* LINTED */(f)->_ext._base = (unsigned char *)(fext)
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| 66 | #endif
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