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1 /*
2  * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. All advertising materials mentioning features or use of this software
14  *    must display the following acknowledgement:
15  *      This product includes software developed by John Birrell.
16  * 4. Neither the name of the author nor the names of any co-contributors
17  *    may be used to endorse or promote products derived from this software
18  *    without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30  * SUCH DAMAGE.
31  *
32  */
33 #include <errno.h>
34 #include <sys/types.h>
35 #include <sys/socket.h>
36 #include <fcntl.h>
37 #ifdef _THREAD_SAFE
38 #include <pthread.h>
39 #include "pthread_private.h"
40
41 ssize_t
42 recvfrom(int fd, void *buf, size_t len, int flags, struct sockaddr * from, int *from_len)
43 {
44         int             ret;
45
46         if ((ret = _thread_fd_lock(fd, FD_READ, NULL, __FILE__, __LINE__)) == 0) {
47                 while ((ret = _thread_sys_recvfrom(fd, buf, len, flags, from, from_len)) < 0) {
48                         if (!(_thread_fd_table[fd]->flags & O_NONBLOCK) && ((errno == EWOULDBLOCK) || (errno == EAGAIN))) {
49                                 _thread_run->data.fd.fd = fd;
50
51                                 /* Set the timeout: */
52                                 _thread_kern_set_timeout(NULL);
53                                 _thread_run->interrupted = 0;
54                                 _thread_kern_sched_state(PS_FDR_WAIT, __FILE__, __LINE__);
55
56                                 /* Check if the wait was interrupted: */
57                                 if (_thread_run->interrupted) {
58                                         /* Return an error status: */
59                                         errno = EINTR;
60                                         ret = -1;
61                                         break;
62                                 }
63                         } else {
64                                 ret = -1;
65                                 break;
66                         }
67                 }
68                 _thread_fd_unlock(fd, FD_READ);
69         }
70         return (ret);
71 }
72 #endif