diff options
Diffstat (limited to 'StdLib/LibC/Stdio/flockfile.c')
| -rw-r--r-- | StdLib/LibC/Stdio/flockfile.c | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/StdLib/LibC/Stdio/flockfile.c b/StdLib/LibC/Stdio/flockfile.c deleted file mode 100644 index 386164e89f..0000000000 --- a/StdLib/LibC/Stdio/flockfile.c +++ /dev/null @@ -1,192 +0,0 @@ -/* $NetBSD: flockfile.c,v 1.8 2003/07/22 00:56:25 nathanw Exp $ */
-
-/*-
- * Copyright (c) 2002 The NetBSD Foundation, Inc.
- * All rights reserved.
- *
- * This code is derived from software contributed to The NetBSD Foundation
- * by Nathan J. Williams.
- *
- * 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 NetBSD
- * Foundation, Inc. and its contributors.
- * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
- */
-#include <LibConfig.h>
-#include <sys/EfiCdefs.h>
-#if defined(LIBC_SCCS) && !defined(lint)
-__RCSID("$NetBSD: flockfile.c,v 1.8 2003/07/22 00:56:25 nathanw Exp $");
-#endif /* LIBC_SCCS and not lint */
-
-#include "namespace.h"
-
-#include <assert.h>
-#include <errno.h>
-#include <stdio.h>
-#include <string.h>
-#include "reentrant.h"
-#include "local.h"
-
-#ifdef __weak_alias
-__weak_alias(flockfile,_flockfile)
-__weak_alias(ftrylockfile,_ftrylockfile)
-__weak_alias(funlockfile,_funlockfile)
-#endif
-
-#ifdef _REENTRANT
-/*
- * XXX This code makes the assumption that a thr_t (pthread_t) is a
- * XXX pointer.
- */
-
-extern int __isthreaded;
-
-void
-flockfile(FILE *fp)
-{
-
- __flockfile_internal(fp, 0);
-}
-
-int
-ftrylockfile(FILE *fp)
-{
- int retval;
-
- if (__isthreaded == 0)
- return 0;
-
- retval = 0;
- mutex_lock(&_LOCK(fp));
-
- if (_LOCKOWNER(fp) == thr_self()) {
- _LOCKCOUNT(fp)++;
- } else if (_LOCKOWNER(fp) == NULL) {
- _LOCKOWNER(fp) = thr_self();
- _LOCKCOUNT(fp) = 1;
- } else
- retval = -1;
-
- mutex_unlock(&_LOCK(fp));
-
- return retval;
-}
-
-void
-funlockfile(FILE *fp)
-{
-
- __funlockfile_internal(fp, 0);
-}
-
-void
-__flockfile_internal(FILE *fp, int internal)
-{
-
- if (__isthreaded == 0)
- return;
-
- mutex_lock(&_LOCK(fp));
-
- if (_LOCKOWNER(fp) == thr_self()) {
- _LOCKCOUNT(fp)++;
- if (internal)
- _LOCKINTERNAL(fp)++;
- } else {
- /* danger! cond_wait() is a cancellation point. */
- int oldstate;
- thr_setcancelstate(PTHREAD_CANCEL_DISABLE, &oldstate);
- while (_LOCKOWNER(fp) != NULL)
- cond_wait(&_LOCKCOND(fp), &_LOCK(fp));
- thr_setcancelstate(oldstate, NULL);
- _LOCKOWNER(fp) = thr_self();
- _LOCKCOUNT(fp) = 1;
- if (internal)
- _LOCKINTERNAL(fp) = 1;
- }
-
- if (_LOCKINTERNAL(fp) == 1)
- /* stash cancellation state and disable */
- thr_setcancelstate(PTHREAD_CANCEL_DISABLE,
- &_LOCKCANCELSTATE(fp));
-
- mutex_unlock(&_LOCK(fp));
-}
-
-void
-__funlockfile_internal(FILE *fp, int internal)
-{
-
- if (__isthreaded == 0)
- return;
-
- mutex_lock(&_LOCK(fp));
-
- if (internal) {
- _LOCKINTERNAL(fp)--;
- if (_LOCKINTERNAL(fp) == 0)
- thr_setcancelstate(_LOCKCANCELSTATE(fp), NULL);
- }
-
- _LOCKCOUNT(fp)--;
- if (_LOCKCOUNT(fp) == 0) {
- _LOCKOWNER(fp) = NULL;
- cond_signal(&_LOCKCOND(fp));
- }
-
- mutex_unlock(&_LOCK(fp));
-}
-
-#else /* _REENTRANT */
-
-void
-flockfile(FILE *fp)
-{
- /* LINTED deliberate lack of effect */
- (void)fp;
-
- return;
-}
-
-int
-ftrylockfile(FILE *fp)
-{
- /* LINTED deliberate lack of effect */
- (void)fp;
-
- return (0);
-}
-
-void
-funlockfile(FILE *fp)
-{
- /* LINTED deliberate lack of effect */
- (void)fp;
-
- return;
-}
-
-#endif /* _REENTRANT */
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