| 1 | /* $NetBSD: fileext.h,v 1.6 2010/01/11 20:39:29 joerg Exp $ */␊ |
| 2 | ␊ |
| 3 | /*-␊ |
| 4 | * Copyright (c)2001 Citrus Project,␊ |
| 5 | * All rights reserved.␊ |
| 6 | *␊ |
| 7 | * Redistribution and use in source and binary forms, with or without␊ |
| 8 | * modification, are permitted provided that the following conditions␊ |
| 9 | * are met:␊ |
| 10 | * 1. Redistributions of source code must retain the above copyright␊ |
| 11 | * notice, this list of conditions and the following disclaimer.␊ |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright␊ |
| 13 | * notice, this list of conditions and the following disclaimer in the␊ |
| 14 | * documentation and/or other materials provided with the distribution.␊ |
| 15 | *␊ |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND␊ |
| 17 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE␊ |
| 18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE␊ |
| 19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE␊ |
| 20 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL␊ |
| 21 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS␊ |
| 22 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)␊ |
| 23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT␊ |
| 24 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY␊ |
| 25 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF␊ |
| 26 | * SUCH DAMAGE.␊ |
| 27 | *␊ |
| 28 | * $Citrus$␊ |
| 29 | */␊ |
| 30 | ␊ |
| 31 | /*␊ |
| 32 | * file extension␊ |
| 33 | */␊ |
| 34 | struct __sfileext {␊ |
| 35 | ␉struct␉__sbuf _ub; /* ungetc buffer */␊ |
| 36 | ␉//struct wchar_io_data _wcio;␉/* wide char i/o status */␊ |
| 37 | ␉size_t _fgetstr_len;␊ |
| 38 | ␉char *_fgetstr_buf;␊ |
| 39 | #ifdef _REENTRANT␊ |
| 40 | ␉mutex_t␉_lock;␉/* Lock for FLOCKFILE/FUNLOCKFILE */␊ |
| 41 | ␉cond_t _lockcond; /* Condition variable for signalling lock releases */␊ |
| 42 | ␉thr_t _lockowner; /* The thread currently holding the lock */␊ |
| 43 | ␉int _lockcount; /* Count of recursive locks */␊ |
| 44 | ␉int _lockinternal; /* Flag of whether the lock is held inside stdio */␊ |
| 45 | ␉int _lockcancelstate; /* Stashed cancellation state on internal lock */␊ |
| 46 | #endif␉␊ |
| 47 | };␊ |
| 48 | ␊ |
| 49 | #define _EXT(fp) ((struct __sfileext *)(void *)((fp)->_ext._base))␊ |
| 50 | #define _UB(fp) _EXT(fp)->_ub␊ |
| 51 | #ifdef _REENTRANT␊ |
| 52 | #define _LOCK(fp) (_EXT(fp)->_lock)␊ |
| 53 | #define _LOCKCOND(fp) (_EXT(fp)->_lockcond)␊ |
| 54 | #define _LOCKOWNER(fp) (_EXT(fp)->_lockowner)␊ |
| 55 | #define _LOCKCOUNT(fp) (_EXT(fp)->_lockcount)␊ |
| 56 | #define _LOCKINTERNAL(fp) (_EXT(fp)->_lockinternal)␊ |
| 57 | #define _LOCKCANCELSTATE(fp) (_EXT(fp)->_lockcancelstate)␊ |
| 58 | #define _FILEEXT_SETUP(f, fext) do { \␊ |
| 59 | /* LINTED */(f)->_ext._base = (unsigned char *)(fext); \␊ |
| 60 | (fext)->_fgetstr_len = 0; \␊ |
| 61 | (fext)->_fgetstr_buf = NULL; \␊ |
| 62 | mutex_init(&_LOCK(f), NULL); \␊ |
| 63 | cond_init(&_LOCKCOND(f), 0, NULL); \␊ |
| 64 | _LOCKOWNER(f) = NULL; \␊ |
| 65 | _LOCKCOUNT(f) = 0; \␊ |
| 66 | _LOCKINTERNAL(f) = 0; \␊ |
| 67 | } while (/* CONSTCOND */ 0)␊ |
| 68 | #else␊ |
| 69 | #define _FILEEXT_SETUP(f, fext) do { \␊ |
| 70 | /* LINTED */(f)->_extra->_base = (unsigned char *)(fext); \␊ |
| 71 | (fext)->_fgetstr_len = 0; \␊ |
| 72 | (fext)->_fgetstr_buf = NULL; \␊ |
| 73 | } while (/* CONSTCOND */ 0)␊ |
| 74 | #endif␊ |
| 75 | |
