1 /* $OpenBSD: fileext.h,v 1.2 2005/06/17 20:40:32 espie Exp $ */ 2 /* $NetBSD: fileext.h,v 1.5 2003/07/18 21:46:41 nathanw Exp $ */ 3 4 /*- 5 * Copyright (c)2001 Citrus Project, 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $Citrus$ 30 */ 31 32 #ifndef _FILEEXT_H_ 33 #define _FILEEXT_H_ 34 35 #include <pthread.h> 36 37 __BEGIN_DECLS 38 39 /* 40 * file extension 41 */ 42 struct __sfileext { 43 struct __sbuf _ub; /* ungetc buffer */ 44 struct wchar_io_data _wcio; /* wide char io status */ 45 pthread_mutex_t _lock; /* file lock */ 46 }; 47 48 #define _FILEEXT_INITIALIZER {{NULL,0},{0},PTHREAD_RECURSIVE_MUTEX_INITIALIZER} 49 50 #define _EXT(fp) ((struct __sfileext *)((fp)->_ext._base)) 51 #define _UB(fp) _EXT(fp)->_ub 52 #define _FLOCK(fp) _EXT(fp)->_lock 53 54 #define _FILEEXT_INIT(fp) \ 55 do { \ 56 _UB(fp)._base = NULL; \ 57 _UB(fp)._size = 0; \ 58 WCIO_INIT(fp); \ 59 _FLOCK(fp).value = __PTHREAD_RECURSIVE_MUTEX_INIT_VALUE; \ 60 } while (0) 61 62 #define _FILEEXT_SETUP(f, fext) \ 63 do { \ 64 (f)->_ext._base = (unsigned char *)(fext); \ 65 _FILEEXT_INIT(f); \ 66 } while (0) 67 68 __END_DECLS 69 70 #endif /* _FILEEXT_H_ */ 71