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/* $OpenBSD: uthread_close.c,v 1.13 2006/09/26 14:18:28 kurt Exp $ */
/*
* Copyright (c) 1995-1998 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by John Birrell.
* 4. 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 AUTHOR 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.
*
* $FreeBSD: uthread_close.c,v 1.7 1999/08/28 00:03:26 peter Exp $
*/
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#ifdef _THREAD_SAFE
#include <pthread.h>
#include "pthread_private.h"
int
close(int fd)
{
int ret;
/* This is a cancelation point: */
_thread_enter_cancellation_point();
if ((fd < 0) || (fd >= _thread_dtablesize) ||
(fd == _thread_kern_pipe[0]) || (fd == _thread_kern_pipe[1])) {
errno = EBADF;
ret = -1;
} else if ((ret = _FD_LOCK(fd, FD_RDWR_CLOSE, NULL)) != -1) {
/*
* We need to hold the entry spinlock till after
* _thread_sys_close() to stop races caused by the
* fd state transition.
*/
_SPINLOCK(&_thread_fd_table[fd]->lock);
_thread_fd_entry_close(fd);
/* Close the file descriptor: */
ret = _thread_sys_close(fd);
_SPINUNLOCK(&_thread_fd_table[fd]->lock);
_FD_UNLOCK(fd, FD_RDWR_CLOSE);
}
/* No longer in a cancellation point: */
_thread_leave_cancellation_point();
return (ret);
}
#endif
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