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/* $NetBSD: fileext.h,v 1.5 2003/07/18 21:46:41 nathanw Exp $ */
/*-
* Copyright (c)2001 Citrus Project,
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Citrus$
*/
/*
* file extension
*/
struct __sfileext {
struct __sbuf _ub; /* ungetc buffer */
struct wchar_io_data _wcio; /* wide char i/o status */
#ifdef _REENTRANT
mutex_t _lock; /* Lock for FLOCKFILE/FUNLOCKFILE */
cond_t _lockcond; /* Condition variable for signalling lock releases */
thr_t _lockowner; /* The thread currently holding the lock */
int _lockcount; /* Count of recursive locks */
int _lockinternal; /* Flag of whether the lock is held inside stdio */
int _lockcancelstate; /* Stashed cancellation state on internal lock */
#endif
};
#define _EXT(fp) ((struct __sfileext *)(void *)((fp)->_ext._base))
#define _UB(fp) _EXT(fp)->_ub
#ifdef _REENTRANT
#define _LOCK(fp) (_EXT(fp)->_lock)
#define _LOCKCOND(fp) (_EXT(fp)->_lockcond)
#define _LOCKOWNER(fp) (_EXT(fp)->_lockowner)
#define _LOCKCOUNT(fp) (_EXT(fp)->_lockcount)
#define _LOCKINTERNAL(fp) (_EXT(fp)->_lockinternal)
#define _LOCKCANCELSTATE(fp) (_EXT(fp)->_lockcancelstate)
#define _FILEEXT_SETUP(f, fext) do { \
/* LINTED */(f)->_ext._base = (unsigned char *)(fext); \
mutex_init(&_LOCK(f), NULL); \
cond_init(&_LOCKCOND(f), 0, NULL); \
_LOCKOWNER(f) = NULL; \
_LOCKCOUNT(f) = 0; \
_LOCKINTERNAL(f) = 0; \
} while (/* LINTED */ 0)
#else
#define _FILEEXT_SETUP(f, fext) /* LINTED */(f)->_ext._base = (unsigned char *)(fext)
#endif
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