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/* $OpenBSD: uthread_recvmsg.c,v 1.10 2010/01/03 23:05:35 fgsch Exp $ */
/*
* 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. 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_recvmsg.c,v 1.4 1999/08/28 00:03:44 peter Exp $
*/
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <fcntl.h>
#ifdef _THREAD_SAFE
#include <pthread.h>
#include "pthread_private.h"
ssize_t
recvmsg(int fd, struct msghdr *msg, int flags)
{
struct pthread *curthread = _get_curthread();
ssize_t ret;
/* This is a cancellation point: */
_thread_enter_cancellation_point();
if ((ret = _FD_LOCK(fd, FD_READ, NULL)) == 0) {
while ((ret = _thread_sys_recvmsg(fd, msg, flags)) < 0) {
if (!(_thread_fd_table[fd]->status_flags->flags & O_NONBLOCK) &&
!(flags & MSG_DONTWAIT) &&
((errno == EWOULDBLOCK) || (errno == EAGAIN))) {
curthread->data.fd.fd = fd;
/* Set the timeout: */
_thread_kern_set_timeout(_FD_RCVTIMEO(fd));
curthread->interrupted = 0;
curthread->closing_fd = 0;
curthread->timeout = 0;
_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 if (curthread->closing_fd) {
/* Return an error status: */
errno = EBADF;
ret = -1;
break;
} else if (curthread->timeout) {
/* Return an error status: */
errno = EWOULDBLOCK;
ret = -1;
break;
}
} else {
ret = -1;
break;
}
}
_FD_UNLOCK(fd, FD_READ);
}
/* No longer in a cancellation point: */
_thread_leave_cancellation_point();
return (ret);
}
#endif
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