diff options
Diffstat (limited to 'mit-pthreads/stdio/findfp.c')
| -rw-r--r-- | mit-pthreads/stdio/findfp.c | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/mit-pthreads/stdio/findfp.c b/mit-pthreads/stdio/findfp.c deleted file mode 100644 index 35817eb6a5f..00000000000 --- a/mit-pthreads/stdio/findfp.c +++ /dev/null @@ -1,161 +0,0 @@ -/*- - * Copyright (c) 1990 The Regents of the University of California. - * Copyright (c) 1993, 1994 Chris Provenzano. - * All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Chris Torek. - * - * 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. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. - */ - -#if defined(LIBC_SCCS) && !defined(lint) -/*static char *sccsid = "from: @(#)findfp.c 5.10 (Berkeley) 2/24/91";*/ -static char *rcsid = "$Id$"; -#endif /* LIBC_SCCS and not lint */ - -#include <pthread.h> -#include <stdlib.h> -#include <stdio.h> -#include <errno.h> -#include <string.h> -#include "local.h" -#include "glue.h" - - -#define NSTATIC 20 /* stdin + stdout + stderr + the usual */ -#define NDYNAMIC 10 /* add ten more whenever necessary */ - -#define std(flags, file) \ - {0,0,0,flags,file,{0},0 } -/* p r w flags file _bf z */ - -static FILE usual[NSTATIC - 3]; /* the usual */ -static struct glue uglue = { 0, NSTATIC - 3, usual }; - -FILE __sF[3] = { - std(__SRD, 0), /* stdin */ - std(__SWR, 1), /* stdout */ - std(__SWR|__SNBF, 2) /* stderr */ -}; -struct glue __sglue = { &uglue, 3, __sF }; -FILE *__iob = __sF; -FILE *_iob = __sF; - -pthread_mutex_t __sfp_mutex = PTHREAD_MUTEX_INITIALIZER; -pthread_cond_t __sfp_cond = PTHREAD_COND_INITIALIZER; -/* - * __sfp_state = 0, when free, > 0 when in _fwalk - * This allows multiple readers in _fwalk, but only one writer __sfp, - * or freopen() at a time. - */ -int __sfp_state = 0; - -static struct glue *moreglue(register int n) -{ - register struct glue *g; - register FILE *p; - static FILE empty; - - g = (struct glue *)malloc(sizeof(struct glue) + n * sizeof(FILE)); - if (g == NULL) - return (NULL); - p = (FILE *)(g + 1); - g->next = NULL; - g->niobs = n; - g->iobs = p; - while (--n >= 0) - *p++ = empty; - return (g); -} - -/* - * Find a free FILE for fopen et al. - */ -FILE *__sfp() -{ - register FILE *fp; - register int n; - register struct glue *g; - - for (g = &__sglue;; g = g->next) { - for (fp = g->iobs, n = g->niobs; --n >= 0; fp++) - if (fp->_flags == 0) { - fp->_flags = 1; /* reserve this slot; caller sets real flags */ - fp->_p = NULL; /* no current pointer */ - fp->_w = 0; /* nothing to read or write */ - fp->_r = 0; - fp->_bf._base = NULL; /* no buffer */ - fp->_bf._size = 0; - fp->_lbfsize = 0; /* not line buffered */ - fp->_file = -1; /* no file */ - fp->_ub._base = NULL; /* no ungetc buffer */ - fp->_ub._size = 0; - fp->_lb._base = NULL; /* no line buffer */ - fp->_lb._size = 0; - goto __sfp_done; - } - if (g->next == NULL && (g->next = moreglue(NDYNAMIC)) == NULL) { - fp = NULL; - break; - } - } -__sfp_done:; - return (fp); -} - -/* - * exit() calls _cleanup() through *__cleanup, set whenever we - * open or buffer a file. This chicanery is done so that programs - * that do not use stdio need not link it all in. - * - * The name `_cleanup' is, alas, fairly well known outside stdio. - */ -void _cleanup() -{ - (void) __swalk_sflush(); -} - -/* - * __sinit() is called whenever stdio's internal variables must be set up. - * Do the pthread_once stuff here to keep pthread_once_t out of the - * header files. No reason sprintf.c &c should need to include pthread.h... - */ -static void __s_real_init () -{ - /* make sure we clean up on exit */ - __cleanup = _cleanup; -} - -static pthread_once_t sdidinit = PTHREAD_ONCE_INIT; - -void __sinit () -{ - pthread_once (&sdidinit, __s_real_init); -} |