1 #ifndef HEADER_CURL_SELECT_H
2 #define HEADER_CURL_SELECT_H
3 /***************************************************************************
4  *                                  _   _ ____  _
5  *  Project                     ___| | | |  _ \| |
6  *                             / __| | | | |_) | |
7  *                            | (__| |_| |  _ <| |___
8  *                             \___|\___/|_| \_\_____|
9  *
10  * Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
11  *
12  * This software is licensed as described in the file COPYING, which
13  * you should have received as part of this distribution. The terms
14  * are also available at http://curl.haxx.se/docs/copyright.html.
15  *
16  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
17  * copies of the Software, and permit persons to whom the Software is
18  * furnished to do so, under the terms of the COPYING file.
19  *
20  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
21  * KIND, either express or implied.
22  *
23  ***************************************************************************/
24 
25 #include "curl_setup.h"
26 
27 #ifdef HAVE_SYS_POLL_H
28 #include <sys/poll.h>
29 #elif defined(HAVE_POLL_H)
30 #include <poll.h>
31 #endif
32 
33 /*
34  * Definition of pollfd struct and constants for platforms lacking them.
35  */
36 
37 #if !defined(HAVE_STRUCT_POLLFD) && \
38     !defined(HAVE_SYS_POLL_H) && \
39     !defined(HAVE_POLL_H)
40 
41 #define POLLIN      0x01
42 #define POLLPRI     0x02
43 #define POLLOUT     0x04
44 #define POLLERR     0x08
45 #define POLLHUP     0x10
46 #define POLLNVAL    0x20
47 
48 struct pollfd
49 {
50     curl_socket_t fd;
51     short   events;
52     short   revents;
53 };
54 
55 #endif
56 
57 #ifndef POLLRDNORM
58 #define POLLRDNORM POLLIN
59 #endif
60 
61 #ifndef POLLWRNORM
62 #define POLLWRNORM POLLOUT
63 #endif
64 
65 #ifndef POLLRDBAND
66 #define POLLRDBAND POLLPRI
67 #endif
68 
69 /* there are three CSELECT defines that are defined in the public header that
70    are exposed to users, but this *IN2 bit is only ever used internally and
71    therefore defined here */
72 #define CURL_CSELECT_IN2 (CURL_CSELECT_ERR << 1)
73 
74 int Curl_socket_check(curl_socket_t readfd, curl_socket_t readfd2,
75                       curl_socket_t writefd,
76                       long timeout_ms);
77 
78 /* provide the former API internally */
79 #define Curl_socket_ready(x,y,z) \
80   Curl_socket_check(x, CURL_SOCKET_BAD, y, z)
81 
82 int Curl_poll(struct pollfd ufds[], unsigned int nfds, int timeout_ms);
83 
84 /* On non-DOS and non-Winsock platforms, when Curl_ack_eintr is set,
85  * EINTR condition is honored and function might exit early without
86  * awaiting full timeout.  Otherwise EINTR will be ignored and full
87  * timeout will elapse. */
88 extern int Curl_ack_eintr;
89 
90 int Curl_wait_ms(int timeout_ms);
91 
92 #ifdef TPF
93 int tpf_select_libcurl(int maxfds, fd_set* reads, fd_set* writes,
94                        fd_set* excepts, struct timeval* tv);
95 #endif
96 
97 /* Winsock and TPF sockets are not in range [0..FD_SETSIZE-1], which
98    unfortunately makes it impossible for us to easily check if they're valid
99 */
100 #if defined(USE_WINSOCK) || defined(TPF)
101 #define VALID_SOCK(x) 1
102 #define VERIFY_SOCK(x) Curl_nop_stmt
103 #else
104 #define VALID_SOCK(s) (((s) >= 0) && ((s) < FD_SETSIZE))
105 #define VERIFY_SOCK(x) do { \
106   if(!VALID_SOCK(x)) { \
107     SET_SOCKERRNO(EINVAL); \
108     return -1; \
109   } \
110 } WHILE_FALSE
111 #endif
112 
113 #endif /* HEADER_CURL_SELECT_H */
114 
115