b5665a9b84
taken by internal stdio functions, and what the cancellation state was when the first such lock was taken.
67 lines
2.7 KiB
C
67 lines
2.7 KiB
C
/* $NetBSD: fileext.h,v 1.5 2003/07/18 21:46:41 nathanw Exp $ */
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/*-
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* Copyright (c)2001 Citrus Project,
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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* $Citrus$
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*/
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/*
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* file extension
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*/
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struct __sfileext {
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struct __sbuf _ub; /* ungetc buffer */
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struct wchar_io_data _wcio; /* wide char i/o status */
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#ifdef _REENTRANT
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mutex_t _lock; /* Lock for FLOCKFILE/FUNLOCKFILE */
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cond_t _lockcond; /* Condition variable for signalling lock releases */
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thr_t _lockowner; /* The thread currently holding the lock */
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int _lockcount; /* Count of recursive locks */
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int _lockinternal; /* Flag of whether the lock is held inside stdio */
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int _lockcancelstate; /* Stashed cancellation state on internal lock */
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#endif
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};
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#define _EXT(fp) ((struct __sfileext *)(void *)((fp)->_ext._base))
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#define _UB(fp) _EXT(fp)->_ub
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#ifdef _REENTRANT
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#define _LOCK(fp) (_EXT(fp)->_lock)
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#define _LOCKCOND(fp) (_EXT(fp)->_lockcond)
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#define _LOCKOWNER(fp) (_EXT(fp)->_lockowner)
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#define _LOCKCOUNT(fp) (_EXT(fp)->_lockcount)
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#define _LOCKINTERNAL(fp) (_EXT(fp)->_lockinternal)
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#define _LOCKCANCELSTATE(fp) (_EXT(fp)->_lockcancelstate)
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#define _FILEEXT_SETUP(f, fext) do { \
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/* LINTED */(f)->_ext._base = (unsigned char *)(fext); \
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mutex_init(&_LOCK(f), NULL); \
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cond_init(&_LOCKCOND(f), 0, NULL); \
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_LOCKOWNER(f) = NULL; \
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_LOCKCOUNT(f) = 0; \
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_LOCKINTERNAL(f) = 0; \
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} while (/* LINTED */ 0)
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#else
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#define _FILEEXT_SETUP(f, fext) /* LINTED */(f)->_ext._base = (unsigned char *)(fext)
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#endif
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