summaryrefslogtreecommitdiffstats
path: root/lib/libc/stdio/_flock_stub.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/libc/stdio/_flock_stub.c')
-rw-r--r--lib/libc/stdio/_flock_stub.c136
1 files changed, 0 insertions, 136 deletions
diff --git a/lib/libc/stdio/_flock_stub.c b/lib/libc/stdio/_flock_stub.c
deleted file mode 100644
index 0b61315..0000000
--- a/lib/libc/stdio/_flock_stub.c
+++ /dev/null
@@ -1,136 +0,0 @@
-/*
- * Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>.
- * 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.
- * 3. Neither the name of the author nor the names of any co-contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL 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.
- */
-
-/*
- * POSIX stdio FILE locking functions. These assume that the locking
- * is only required at FILE structure level, not at file descriptor
- * level too.
- *
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#include "namespace.h"
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <pthread.h>
-#include "un-namespace.h"
-
-#include "local.h"
-
-
-/*
- * Weak symbols for externally visible functions in this file:
- */
-__weak_reference(_flockfile, flockfile);
-__weak_reference(_flockfile_debug_stub, _flockfile_debug);
-__weak_reference(_ftrylockfile, ftrylockfile);
-__weak_reference(_funlockfile, funlockfile);
-
-void
-_flockfile(FILE *fp)
-{
- pthread_t curthread = _pthread_self();
-
- if (fp->_fl_owner == curthread)
- fp->_fl_count++;
- else {
- /*
- * Make sure this mutex is treated as a private
- * internal mutex:
- */
- _pthread_mutex_lock(&fp->_fl_mutex);
- fp->_fl_owner = curthread;
- fp->_fl_count = 1;
- }
-}
-
-/*
- * This can be overriden by the threads library if it is linked in.
- */
-void
-_flockfile_debug_stub(FILE *fp, char *fname, int lineno)
-{
- _flockfile(fp);
-}
-
-int
-_ftrylockfile(FILE *fp)
-{
- pthread_t curthread = _pthread_self();
- int ret = 0;
-
- if (fp->_fl_owner == curthread)
- fp->_fl_count++;
- /*
- * Make sure this mutex is treated as a private
- * internal mutex:
- */
- else if (_pthread_mutex_trylock(&fp->_fl_mutex) == 0) {
- fp->_fl_owner = curthread;
- fp->_fl_count = 1;
- }
- else
- ret = -1;
- return (ret);
-}
-
-void
-_funlockfile(FILE *fp)
-{
- pthread_t curthread = _pthread_self();
-
- /*
- * Check if this file is owned by the current thread:
- */
- if (fp->_fl_owner == curthread) {
- /*
- * Check if this thread has locked the FILE
- * more than once:
- */
- if (fp->_fl_count > 1)
- /*
- * Decrement the count of the number of
- * times the running thread has locked this
- * file:
- */
- fp->_fl_count--;
- else {
- /*
- * The running thread will release the
- * lock now:
- */
- fp->_fl_count = 0;
- fp->_fl_owner = NULL;
- _pthread_mutex_unlock(&fp->_fl_mutex);
- }
- }
-}
OpenPOWER on IntegriCloud