| 1 | #ifndef HEADER_CURL_SELECT_H
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| 2 | #define HEADER_CURL_SELECT_H
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| 3 | /***************************************************************************
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| 4 | * _ _ ____ _
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| 5 | * Project ___| | | | _ \| |
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| 6 | * / __| | | | |_) | |
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| 7 | * | (__| |_| | _ <| |___
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| 8 | * \___|\___/|_| \_\_____|
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| 9 | *
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| 10 | * Copyright (C) Daniel Stenberg, <[email protected]>, et al.
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| 11 | *
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| 12 | * This software is licensed as described in the file COPYING, which
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| 13 | * you should have received as part of this distribution. The terms
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| 14 | * are also available at https://curl.se/docs/copyright.html.
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| 15 | *
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| 16 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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| 17 | * copies of the Software, and permit persons to whom the Software is
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| 18 | * furnished to do so, under the terms of the COPYING file.
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| 19 | *
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| 20 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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| 21 | * KIND, either express or implied.
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| 22 | *
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| 23 | * SPDX-License-Identifier: curl
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| 24 | *
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| 25 | ***************************************************************************/
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| 26 |
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| 27 | #include "curl_setup.h"
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| 28 |
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| 29 | #ifdef HAVE_POLL_H
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| 30 | #include <poll.h>
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| 31 | #elif defined(HAVE_SYS_POLL_H)
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| 32 | #include <sys/poll.h>
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| 33 | #endif
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| 34 |
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| 35 | /*
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| 36 | * Definition of pollfd struct and constants for platforms lacking them.
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| 37 | */
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| 38 |
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| 39 | #if !defined(HAVE_SYS_POLL_H) && \
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| 40 | !defined(HAVE_POLL_H) && \
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| 41 | !defined(POLLIN)
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| 42 |
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| 43 | #define POLLIN 0x01
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| 44 | #define POLLPRI 0x02
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| 45 | #define POLLOUT 0x04
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| 46 | #define POLLERR 0x08
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| 47 | #define POLLHUP 0x10
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| 48 | #define POLLNVAL 0x20
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| 49 |
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| 50 | struct pollfd
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| 51 | {
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| 52 | curl_socket_t fd;
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| 53 | short events;
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| 54 | short revents;
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| 55 | };
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| 56 |
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| 57 | #endif
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| 58 |
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| 59 | #ifndef POLLRDNORM
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| 60 | #define POLLRDNORM POLLIN
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| 61 | #endif
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| 62 |
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| 63 | #ifndef POLLWRNORM
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| 64 | #define POLLWRNORM POLLOUT
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| 65 | #endif
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| 66 |
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| 67 | #ifndef POLLRDBAND
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| 68 | #define POLLRDBAND POLLPRI
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| 69 | #endif
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| 70 |
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| 71 | /* there are three CSELECT defines that are defined in the public header that
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| 72 | are exposed to users, but this *IN2 bit is only ever used internally and
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| 73 | therefore defined here */
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| 74 | #define CURL_CSELECT_IN2 (CURL_CSELECT_ERR << 1)
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| 75 |
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| 76 | int Curl_socket_check(curl_socket_t readfd, curl_socket_t readfd2,
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| 77 | curl_socket_t writefd,
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| 78 | timediff_t timeout_ms);
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| 79 | #define SOCKET_READABLE(x,z) \
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| 80 | Curl_socket_check(x, CURL_SOCKET_BAD, CURL_SOCKET_BAD, z)
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| 81 | #define SOCKET_WRITABLE(x,z) \
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| 82 | Curl_socket_check(CURL_SOCKET_BAD, CURL_SOCKET_BAD, x, z)
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| 83 |
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| 84 | int Curl_poll(struct pollfd ufds[], unsigned int nfds, timediff_t timeout_ms);
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| 85 | int Curl_wait_ms(timediff_t timeout_ms);
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| 86 |
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| 87 | /*
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| 88 | With Winsock the valid range is [0..INVALID_SOCKET-1] according to
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| 89 | https://docs.microsoft.com/en-us/windows/win32/winsock/socket-data-type-2
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| 90 | */
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| 91 | #ifdef USE_WINSOCK
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| 92 | #define VALID_SOCK(s) ((s) < INVALID_SOCKET)
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| 93 | #define FDSET_SOCK(x) 1
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| 94 | #define VERIFY_SOCK(x) do { \
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| 95 | if(!VALID_SOCK(x)) { \
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| 96 | SET_SOCKERRNO(WSAEINVAL); \
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| 97 | return -1; \
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| 98 | } \
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| 99 | } while(0)
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| 100 | #else
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| 101 | #define VALID_SOCK(s) ((s) >= 0)
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| 102 |
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| 103 | /* If the socket is small enough to get set or read from an fdset */
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| 104 | #define FDSET_SOCK(s) ((s) < FD_SETSIZE)
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| 105 |
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| 106 | #define VERIFY_SOCK(x) do { \
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| 107 | if(!VALID_SOCK(x) || !FDSET_SOCK(x)) { \
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| 108 | SET_SOCKERRNO(EINVAL); \
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| 109 | return -1; \
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| 110 | } \
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| 111 | } while(0)
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| 112 | #endif
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| 113 |
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| 114 | #endif /* HEADER_CURL_SELECT_H */
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