1 /*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Chris Torek. 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 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)local.h 8.3 (Berkeley) 7/3/94 37 * 38 * $FreeBSD$ 39 */ 40 41 #include <sys/types.h> /* for off_t */ 42 #include <pthread.h> 43 44 /* 45 * Information local to this implementation of stdio, 46 * in particular, macros and private variables. 47 */ 48 49 extern int _sread __P((FILE *, char *, int)); 50 extern int _swrite __P((FILE *, char const *, int)); 51 extern fpos_t _sseek __P((FILE *, fpos_t, int)); 52 extern int _ftello __P((FILE *, fpos_t *)); 53 extern int _fseeko __P((FILE *, off_t, int, int)); 54 extern int __fflush __P((FILE *fp)); 55 extern int __sflush __P((FILE *)); 56 extern FILE *__sfp __P((void)); 57 extern int __srefill __P((FILE *)); 58 extern int __sread __P((void *, char *, int)); 59 extern int __swrite __P((void *, char const *, int)); 60 extern fpos_t __sseek __P((void *, fpos_t, int)); 61 extern int __sclose __P((void *)); 62 extern void __sinit __P((void)); 63 extern void _cleanup __P((void)); 64 extern void (*__cleanup) __P((void)); 65 extern void __smakebuf __P((FILE *)); 66 extern int __swhatbuf __P((FILE *, size_t *, int *)); 67 extern int _fwalk __P((int (*)(FILE *))); 68 extern int __swsetup __P((FILE *)); 69 extern int __sflags __P((const char *, int *)); 70 extern int __ungetc __P((int, FILE *)); 71 extern int __vfprintf __P((FILE *, const char *, _BSD_VA_LIST_)); 72 73 extern int __sdidinit; 74 75 76 /* hold a buncha junk that would grow the ABI */ 77 struct __sFILEX { 78 unsigned char *_up; /* saved _p when _p is doing ungetc data */ 79 pthread_mutex_t fl_mutex; /* used for MT-safety */ 80 pthread_t fl_owner; /* current owner */ 81 int fl_count; /* recursive lock count */ 82 }; 83 84 /* 85 * Return true iff the given FILE cannot be written now. 86 */ 87 #define cantwrite(fp) \ 88 ((((fp)->_flags & __SWR) == 0 || \ 89 ((fp)->_bf._base == NULL && ((fp)->_flags & __SSTR) == 0)) && \ 90 __swsetup(fp)) 91 92 /* 93 * Test whether the given stdio file has an active ungetc buffer; 94 * release such a buffer, without restoring ordinary unread data. 95 */ 96 #define HASUB(fp) ((fp)->_ub._base != NULL) 97 #define FREEUB(fp) { \ 98 if ((fp)->_ub._base != (fp)->_ubuf) \ 99 free((char *)(fp)->_ub._base); \ 100 (fp)->_ub._base = NULL; \ 101 } 102 103 /* 104 * test for an fgetln() buffer. 105 */ 106 #define HASLB(fp) ((fp)->_lb._base != NULL) 107 #define FREELB(fp) { \ 108 free((char *)(fp)->_lb._base); \ 109 (fp)->_lb._base = NULL; \ 110 } 111 112 #define INITEXTRA(fp) { \ 113 (fp)->_extra->_up = NULL; \ 114 (fp)->_extra->fl_mutex = PTHREAD_MUTEX_INITIALIZER; \ 115 (fp)->_extra->fl_owner = NULL; \ 116 (fp)->_extra->fl_count = 0; \ 117 } 118