1#ifndef HEADER_CURL_SELECT_H
2#define HEADER_CURL_SELECT_H
3/***************************************************************************
4 * _ _ ____ _
5 * Project ___| | | | _ \| |
6 * / __| | | | |_) | |
7 * | (__| |_| | _ <| |___
8 * \___|\___/|_| \_\_____|
9 *
10 * Copyright (C) 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 https://curl.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 * SPDX-License-Identifier: curl
24 *
25 ***************************************************************************/
26
27#include "curl_setup.h"
28
29#ifdef HAVE_POLL_H
30#include <poll.h>
31#elif defined(HAVE_SYS_POLL_H)
32#include <sys/poll.h>
33#endif
34
35/*
36 * Definition of pollfd struct and constants for platforms lacking them.
37 */
38
39#if !defined(HAVE_SYS_POLL_H) && \
40 !defined(HAVE_POLL_H) && \
41 !defined(POLLIN)
42
43#define POLLIN 0x01
44#define POLLPRI 0x02
45#define POLLOUT 0x04
46#define POLLERR 0x08
47#define POLLHUP 0x10
48#define POLLNVAL 0x20
49
50struct pollfd
51{
52 curl_socket_t fd;
53 short events;
54 short revents;
55};
56
57#endif
58
59#ifndef POLLRDNORM
60#define POLLRDNORM POLLIN
61#endif
62
63#ifndef POLLWRNORM
64#define POLLWRNORM POLLOUT
65#endif
66
67#ifndef POLLRDBAND
68#define POLLRDBAND POLLPRI
69#endif
70
71/* there are three CSELECT defines that are defined in the public header that
72 are exposed to users, but this *IN2 bit is only ever used internally and
73 therefore defined here */
74#define CURL_CSELECT_IN2 (CURL_CSELECT_ERR << 1)
75
76int Curl_socket_check(curl_socket_t readfd, curl_socket_t readfd2,
77 curl_socket_t writefd,
78 timediff_t timeout_ms);
79#define SOCKET_READABLE(x,z) \
80 Curl_socket_check(x, CURL_SOCKET_BAD, CURL_SOCKET_BAD, z)
81#define SOCKET_WRITABLE(x,z) \
82 Curl_socket_check(CURL_SOCKET_BAD, CURL_SOCKET_BAD, x, z)
83
84int Curl_poll(struct pollfd ufds[], unsigned int nfds, timediff_t timeout_ms);
85int Curl_wait_ms(timediff_t timeout_ms);
86
87/*
88 With Winsock the valid range is [0..INVALID_SOCKET-1] according to
89 https://docs.microsoft.com/en-us/windows/win32/winsock/socket-data-type-2
90*/
91#ifdef USE_WINSOCK
92#define VALID_SOCK(s) ((s) < INVALID_SOCKET)
93#define FDSET_SOCK(x) 1
94#define VERIFY_SOCK(x) do { \
95 if(!VALID_SOCK(x)) { \
96 SET_SOCKERRNO(WSAEINVAL); \
97 return -1; \
98 } \
99} while(0)
100#else
101#define VALID_SOCK(s) ((s) >= 0)
102
103/* If the socket is small enough to get set or read from an fdset */
104#define FDSET_SOCK(s) ((s) < FD_SETSIZE)
105
106#define VERIFY_SOCK(x) do { \
107 if(!VALID_SOCK(x) || !FDSET_SOCK(x)) { \
108 SET_SOCKERRNO(EINVAL); \
109 return -1; \
110 } \
111 } while(0)
112#endif
113
114#endif /* HEADER_CURL_SELECT_H */
115