1#ifndef HEADER_CURL_SELECT_H
2#define HEADER_CURL_SELECT_H
3/***************************************************************************
4 *                                  _   _ ____  _
5 *  Project                     ___| | | |  _ \| |
6 *                             / __| | | | |_) | |
7 *                            | (__| |_| |  _ <| |___
8 *                             \___|\___/|_| \_\_____|
9 *
10 * Copyright (C) 1998 - 2016, 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.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
48struct 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
74int Curl_socket_check(curl_socket_t readfd, curl_socket_t readfd2,
75                      curl_socket_t writefd,
76                      time_t timeout_ms);
77
78#define SOCKET_READABLE(x,z) \
79  Curl_socket_check(x, CURL_SOCKET_BAD, CURL_SOCKET_BAD, z)
80#define SOCKET_WRITABLE(x,z) \
81  Curl_socket_check(CURL_SOCKET_BAD, CURL_SOCKET_BAD, x, z)
82
83int Curl_poll(struct pollfd ufds[], unsigned int nfds, int timeout_ms);
84
85/* On non-DOS and non-Winsock platforms, when Curl_ack_eintr is set,
86 * EINTR condition is honored and function might exit early without
87 * awaiting full timeout.  Otherwise EINTR will be ignored and full
88 * timeout will elapse. */
89extern int Curl_ack_eintr;
90
91int Curl_wait_ms(int timeout_ms);
92
93#ifdef TPF
94int tpf_select_libcurl(int maxfds, fd_set* reads, fd_set* writes,
95                       fd_set* excepts, struct timeval* tv);
96#endif
97
98/* Winsock and TPF sockets are not in range [0..FD_SETSIZE-1], which
99   unfortunately makes it impossible for us to easily check if they're valid
100*/
101#if defined(USE_WINSOCK) || defined(TPF)
102#define VALID_SOCK(x) 1
103#define VERIFY_SOCK(x) Curl_nop_stmt
104#else
105#define VALID_SOCK(s) (((s) >= 0) && ((s) < FD_SETSIZE))
106#define VERIFY_SOCK(x) do { \
107  if(!VALID_SOCK(x)) { \
108    SET_SOCKERRNO(EINVAL); \
109    return -1; \
110  } \
111} WHILE_FALSE
112#endif
113
114#endif /* HEADER_CURL_SELECT_H */
115
116