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--- Libc/Libc-1725.40.4/stdio/FreeBSD/findfp.c
+++ /dev/null
@@ -1,326 +0,0 @@
-/*-
- * Copyright (c) 1990, 1993
- * The Regents of the University of California. 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.
- * 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.
- */
-
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wcomma"
-
-#if defined(LIBC_SCCS) && !defined(lint)
-static char sccsid[] = "@(#)findfp.c 8.2 (Berkeley) 1/4/94";
-#endif /* LIBC_SCCS and not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/lib/libc/stdio/findfp.c,v 1.34 2009/12/05 19:31:38 ed Exp $");
-
-#include <TargetConditionals.h>
-
-#include <sys/param.h>
-#include <machine/atomic.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <libkern/OSAtomic.h>
-#include <errno.h>
-
-#include <pthread.h>
-#include <spinlock.h>
-
-#include "libc_private.h"
-#include "local.h"
-#include "glue.h"
-
-pthread_once_t __sdidinit;
-
-#if !TARGET_OS_IPHONE
-#define NDYNAMIC 10 /* add ten more whenever necessary */
-#else
-#define NDYNAMIC 1 /* add one at a time on embedded */
-#endif
-
-#define std(flags, file) { \
- ._flags = (flags), \
- ._file = (file), \
- ._cookie = __sF + (file), \
- ._close = __sclose, \
- ._read = __sread, \
- ._seek = __sseek, \
- ._write = __swrite, \
- ._extra = __sFX + file, \
-}
- /* set counted */
-#define __sFXInit3 {.fl_mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER, .counted = 1}
-
-static int64_t __scounted; /* streams counted against STREAM_MAX */
-
-#if !(TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR)
-/* usual and usual_extra are data pigs. See 7929728. For embedded we should
- * always allocate dynamically, and probably should for desktop too. */
- /* the usual - (stdin + stdout + stderr) */
-static FILE usual[FOPEN_MAX - 3];
-static struct __sFILEX usual_extra[FOPEN_MAX - 3];
-static struct glue uglue = { NULL, FOPEN_MAX - 3, usual };
-#endif /* !(TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR) */
-
-static struct __sFILEX __sFX[3] = {__sFXInit3, __sFXInit3, __sFXInit3};
-
-/*
- * We can't make this 'static' due to binary compatibility concerns.
- * This also means we cannot change the sizeof(FILE) and must continue to
- * use the __sFILEX stuff to add to FILE.
- */
-FILE __sF[3] = {
- std(__SRD, STDIN_FILENO),
- std(__SWR, STDOUT_FILENO),
- std(__SWR|__SNBF, STDERR_FILENO)
-};
-
-FILE *__stdinp = &__sF[0];
-FILE *__stdoutp = &__sF[1];
-FILE *__stderrp = &__sF[2];
-
-#if !(TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR)
-struct glue __sglue = { &uglue, 3, __sF };
-static struct glue *lastglue = &uglue;
-#else
-struct glue __sglue = { NULL, 3, __sF };
-static struct glue *lastglue = &__sglue;
-#endif
-
-static struct glue * moreglue(int);
-
-static pthread_mutex_t filelist_lock = PTHREAD_MUTEX_INITIALIZER;
-#define FILELIST_LOCK() do { pthread_mutex_lock(&filelist_lock); } while(0)
-#define FILELIST_UNLOCK() do { pthread_mutex_unlock(&filelist_lock); } while(0)
-
-static struct glue *
-moreglue(int n)
-{
- struct glue *g;
- FILE *p;
- struct __sFILEX *fx;
- size_t align;
-
- align = __alignof__( (struct { FILE f; struct __sFILEX s; }){} );
- g = (struct glue *)malloc(sizeof(*g) + align + n * sizeof(FILE) +
- n * sizeof(struct __sFILEX));
- if (g == NULL)
- return (NULL);
- p = (FILE *)roundup((uintptr_t)(g + 1), align);
- fx = (struct __sFILEX *)&p[n];
- g->next = NULL;
- g->niobs = n;
- g->iobs = p;
-
- while (--n >= 0) {
- bzero(p, sizeof(*p));
- p->_extra = fx;
- INITEXTRA(p);
- p++, fx++;
- }
- return (g);
-}
-
-/*
- * Find a free FILE for fopen et al.
- */
-FILE *
-__sfp(int count)
-{
- FILE *fp;
- int n;
- struct glue *g;
-
- pthread_once(&__sdidinit, __sinit);
-
- if (count) {
- int64_t new = OSAtomicIncrement64(&__scounted);
- if (new > sysconf(_SC_STREAM_MAX)) {
- OSAtomicDecrement64(&__scounted);
- errno = EMFILE;
- return NULL;
- }
- /* Overflowing #streams beyond RLIM_INFINITY */
- if (new < 0) {
- OSAtomicDecrement64(&__scounted);
- errno = EOVERFLOW;
- return NULL;
- }
- }
- /*
- * The list must be locked because a FILE may be updated.
- */
- FILELIST_LOCK();
- for (g = &__sglue; g != NULL; g = g->next) {
- for (fp = g->iobs, n = g->niobs; --n >= 0; fp++)
- if (fp->_flags == 0)
- goto found;
- }
- FILELIST_UNLOCK(); /* don't hold lock while malloc()ing. */
- if ((g = moreglue(NDYNAMIC)) == NULL) {
- if (count)
- OSAtomicDecrement64(&__scounted);
- return (NULL);
- }
- FILELIST_LOCK(); /* reacquire the lock */
- lastglue->next = g; /* atomically append glue to list */
- lastglue = g; /* not atomic; only accessed when locked */
- fp = g->iobs;
-found:
- fp->_flags = 1; /* reserve this slot; caller sets real flags */
- FILELIST_UNLOCK();
-
- /* _flags = 1 means the FILE* is in use, and this thread owns the object while it is being initialized */
- 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->_cookie = <any>; */ /* caller sets cookie, _read/_write etc */
- fp->_ub._base = NULL; /* no ungetc buffer */
- fp->_ub._size = 0;
- fp->_lb._base = NULL; /* no line buffer */
- fp->_lb._size = 0;
-/* fp->_lock = NULL; */ /* once set always set (reused) */
- INITEXTRA(fp);
- fp->_extra->counted = count ? 1 : 0;
- return (fp);
-}
-
-/*
- * Mark as free and update count as needed
- */
-__private_extern__ void
-__sfprelease(FILE *fp)
-{
- if (fp->_counted) {
- OSAtomicDecrement64(&__scounted);
- fp->_counted = 0;
- }
-
- pthread_mutex_destroy(&fp->_extra->fl_mutex);
-
- /* Make sure nobody else is enumerating the list while we clear the "in use" _flags field. */
- FILELIST_LOCK();
- fp->_flags = 0;
- FILELIST_UNLOCK();
-}
-
-/*
- * XXX. Force immediate allocation of internal memory. Not used by stdio,
- * but documented historically for certain applications. Bad applications.
- */
-__warn_references(f_prealloc,
- "warning: this program uses f_prealloc(), which is not recommended.");
-
-void
-f_prealloc(void)
-{
- struct glue *g;
- int n;
-
- n = getdtablesize() - FOPEN_MAX + 20; /* 20 for slop. */
- /*
- * It should be safe to walk the list without locking it;
- * new nodes are only added to the end and none are ever
- * removed.
- */
- for (g = &__sglue; (n -= g->niobs) > 0 && g->next; g = g->next)
- /* void */;
- if ((n > 0) && ((g = moreglue(n)) != NULL)) {
- FILELIST_LOCK();
- lastglue->next = g;
- lastglue = g;
- FILELIST_UNLOCK();
- }
-}
-
-/*
- * exit() calls _cleanup() checking __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.
- */
-#ifdef __APPLE__
-static int
-tryflush(FILE *fp)
-{
- int ret;
-
- if (__isthreaded)
- if (ftrylockfile(fp) < 0)
- return (-1);
- ret = __sflush(fp);
- if (__isthreaded)
- funlockfile(fp);
- return (ret);
-}
-#endif /* __APPLE__ */
-void
-_cleanup(void)
-{
-#ifdef __APPLE__
- (void)_fwalk(tryflush);
-#else
- /* (void) _fwalk(fclose); */
- (void) _fwalk(__sflush); /* `cheating' */
-#endif /* __APPLE__ */
-}
-
-/*
- * __sinit() is called whenever stdio's internal variables must be set up.
- */
-void
-__sinit(void)
-{
-#if !(TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR)
- int i;
-#endif
-
- /* Make sure we clean up on exit. */
-#ifdef __APPLE__
- __cleanup = 1; /* conservative */
-#else
- __cleanup = _cleanup; /* conservative */
-#endif // __APPLE__
- __scounted = 3; /* account for std{in,out,err} */
-
-#if !(TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR)
- /* Set _extra for the usual suspects. */
- for (i = 0; i < FOPEN_MAX - 3; i++) {
- usual[i]._extra = &usual_extra[i];
- INITEXTRA(&usual[i]);
- }
-#endif
-}
-#pragma clang diagnostic pop