freebsd-dev/lib/libc_r/uthread/uthread_recvfrom.c
2007-01-12 07:26:21 +00:00

87 lines
2.8 KiB
C

/*
* 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. 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.
*
* $FreeBSD$
*/
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <fcntl.h>
#include <pthread.h>
#include "pthread_private.h"
__weak_reference(__recvfrom, recvfrom);
ssize_t
_recvfrom(int fd, void *buf, size_t len, int flags, struct sockaddr * from,
socklen_t *from_len)
{
struct pthread *curthread = _get_curthread();
int ret;
if ((ret = _FD_LOCK(fd, FD_READ, NULL)) == 0) {
while ((ret = __sys_recvfrom(fd, buf, len, flags, from, from_len)) < 0) {
if (((_thread_fd_getflags(fd) & O_NONBLOCK) == 0)
&& ((errno == EWOULDBLOCK) || (errno == EAGAIN))) {
curthread->data.fd.fd = fd;
/* Set the timeout: */
_thread_kern_set_timeout(NULL);
curthread->interrupted = 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 {
ret = -1;
break;
}
}
_FD_UNLOCK(fd, FD_READ);
}
return (ret);
}
ssize_t
__recvfrom(int fd, void *buf, size_t len, int flags, struct sockaddr * from,
socklen_t *from_len)
{
int ret;
_thread_enter_cancellation_point();
ret = _recvfrom(fd, buf, len, flags, from, from_len);
_thread_leave_cancellation_point();
return (ret);
}