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 #include <stdbool.h> 37 38 __BEGIN_DECLS 39 40 /* 41 * file extension 42 */ 43 struct __sfileext { 44 struct __sbuf _ub; /* ungetc buffer */ 45 struct wchar_io_data _wcio; /* wide char io status */ 46 pthread_mutex_t _lock; /* file lock */ 47 bool _stdio_handles_locking; /* __fsetlocking support */ 48 }; 49 50 #if defined(__cplusplus) 51 #define _EXT(fp) reinterpret_cast<__sfileext*>((fp)->_ext._base) 52 #else 53 #define _EXT(fp) ((struct __sfileext *)((fp)->_ext._base)) 54 #endif 55 56 #define _UB(fp) _EXT(fp)->_ub 57 #define _FLOCK(fp) _EXT(fp)->_lock 58 59 #define _FILEEXT_INIT(fp) \ 60 do { \ 61 _UB(fp)._base = NULL; \ 62 _UB(fp)._size = 0; \ 63 WCIO_INIT(fp); \ 64 pthread_mutexattr_t attr; \ 65 pthread_mutexattr_init(&attr); \ 66 pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE); \ 67 pthread_mutex_init(&_FLOCK(fp), &attr); \ 68 pthread_mutexattr_destroy(&attr); \ 69 _EXT(fp)->_stdio_handles_locking = true; \ 70 } while (0) 71 72 #define _FILEEXT_SETUP(f, fext) \ 73 do { \ 74 (f)->_ext._base = (unsigned char *)(fext); \ 75 _FILEEXT_INIT(f); \ 76 } while (0) 77 78 __END_DECLS 79 80 #endif /* _FILEEXT_H_ */ 81
