/* $OpenBSD: fileext.h,v 1.2 2005/06/17 20:40:32 espie Exp $ */ /* $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. * * $Citrus$ */ #ifndef _FILEEXT_H_ #define _FILEEXT_H_ #include <pthread.h> #include <stdbool.h> __BEGIN_DECLS /* * file extension */ struct __sfileext { struct __sbuf _ub; /* ungetc buffer */ struct wchar_io_data _wcio; /* wide char io status */ pthread_mutex_t _lock; /* file lock */ bool _stdio_handles_locking; /* __fsetlocking support */ }; #if defined(__cplusplus) #define _EXT(fp) reinterpret_cast<__sfileext*>((fp)->_ext._base) #else #define _EXT(fp) ((struct __sfileext *)((fp)->_ext._base)) #endif #define _UB(fp) _EXT(fp)->_ub #define _FLOCK(fp) _EXT(fp)->_lock #define _FILEEXT_INIT(fp) \ do { \ _UB(fp)._base = NULL; \ _UB(fp)._size = 0; \ WCIO_INIT(fp); \ pthread_mutexattr_t attr; \ pthread_mutexattr_init(&attr); \ pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE); \ pthread_mutex_init(&_FLOCK(fp), &attr); \ pthread_mutexattr_destroy(&attr); \ _EXT(fp)->_stdio_handles_locking = true; \ } while (0) #define _FILEEXT_SETUP(f, fext) \ do { \ (f)->_ext._base = (unsigned char *)(fext); \ _FILEEXT_INIT(f); \ } while (0) __END_DECLS #endif /* _FILEEXT_H_ */