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/* $OpenBSD: uthread_accept.c,v 1.8 2003/12/23 19:31:05 brad 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_accept.c,v 1.9 1999/08/28 00:03:20 peter Exp $
*/
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <fcntl.h>
#ifdef _THREAD_SAFE
#include <pthread.h>
#include "pthread_private.h"
int
accept(int fd, struct sockaddr * name, socklen_t *namelen)
{
struct pthread *curthread = _get_curthread();
int ret;
/* This is a cancellation point: */
_thread_enter_cancellation_point();
/* Lock the file descriptor: */
if ((ret = _FD_LOCK(fd, FD_RDWR, NULL)) == 0) {
/* Enter a loop to wait for a connection request: */
while ((ret = _thread_sys_accept(fd, name, namelen)) < 0) {
/* Check if the socket is to block: */
if ((_thread_fd_table[fd]->flags & O_NONBLOCK) == 0 &&
(errno == EWOULDBLOCK || errno == EAGAIN)) {
/* Save the socket file descriptor: */
curthread->data.fd.fd = fd;
curthread->data.fd.fname = __FILE__;
curthread->data.fd.branch = __LINE__;
/* Set the timeout: */
_thread_kern_set_timeout(NULL);
curthread->interrupted = 0;
/* Schedule the next thread: */
_thread_kern_sched_state(PS_FDR_WAIT, __FILE__,
__LINE__);
/* Check if the wait was interrupted: */
if (curthread->interrupted) {
/* Return an error status: */
errno = EINTR;
ret = -1;
break;
}
} else {
/*
* Another error has occurred, so exit the
* loop here:
*/
break;
}
}
/*
* If no errors initialize the file descriptor table
* for the new socket. Turn on blocking mode in the
* child if it is on in the parent. This is done
* as _thread_fd_table_init *may* have turned the flag on.
*/
if (ret != -1) {
if (_thread_fd_table_init(ret) != 0) {
/* Quietly close the socket: */
_thread_sys_close(ret);
ret = -1;
} else if ((_thread_fd_table[fd]->flags & O_NONBLOCK) == 0)
_thread_fd_table[ret]->flags &= ~O_NONBLOCK;
}
/* Unlock the file descriptor: */
_FD_UNLOCK(fd, FD_RDWR);
}
/* No longer in a cancellation point: */
_thread_leave_cancellation_point();
/* Return the socket file descriptor or -1 on error: */
return (ret);
}
#endif
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