diff options
Diffstat (limited to 'lib/libc/stdio/_flock_stub.c')
-rw-r--r-- | lib/libc/stdio/_flock_stub.c | 136 |
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); - } - } -} |