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- #ifndef HEADER_CURL_SELECT_H
- #define HEADER_CURL_SELECT_H
- /***************************************************************************
- * _ _ ____ _
- * Project ___| | | | _ \| |
- * / __| | | | |_) | |
- * | (__| |_| | _ <| |___
- * \___|\___/|_| \_\_____|
- *
- * Copyright (C) 1998 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al.
- *
- * This software is licensed as described in the file COPYING, which
- * you should have received as part of this distribution. The terms
- * are also available at https://curl.se/docs/copyright.html.
- *
- * You may opt to use, copy, modify, merge, publish, distribute and/or sell
- * copies of the Software, and permit persons to whom the Software is
- * furnished to do so, under the terms of the COPYING file.
- *
- * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
- * KIND, either express or implied.
- *
- ***************************************************************************/
- #include "curl_setup.h"
- #ifdef HAVE_POLL_H
- #include <poll.h>
- #elif defined(HAVE_SYS_POLL_H)
- #include <sys/poll.h>
- #endif
- /*
- * Definition of pollfd struct and constants for platforms lacking them.
- */
- #if !defined(HAVE_STRUCT_POLLFD) && \
- !defined(HAVE_SYS_POLL_H) && \
- !defined(HAVE_POLL_H) && \
- !defined(POLLIN)
- #define POLLIN 0x01
- #define POLLPRI 0x02
- #define POLLOUT 0x04
- #define POLLERR 0x08
- #define POLLHUP 0x10
- #define POLLNVAL 0x20
- struct pollfd
- {
- curl_socket_t fd;
- short events;
- short revents;
- };
- #endif
- #ifndef POLLRDNORM
- #define POLLRDNORM POLLIN
- #endif
- #ifndef POLLWRNORM
- #define POLLWRNORM POLLOUT
- #endif
- #ifndef POLLRDBAND
- #define POLLRDBAND POLLPRI
- #endif
- /* there are three CSELECT defines that are defined in the public header that
- are exposed to users, but this *IN2 bit is only ever used internally and
- therefore defined here */
- #define CURL_CSELECT_IN2 (CURL_CSELECT_ERR << 1)
- int Curl_socket_check(curl_socket_t readfd, curl_socket_t readfd2,
- curl_socket_t writefd,
- timediff_t timeout_ms);
- #define SOCKET_READABLE(x,z) \
- Curl_socket_check(x, CURL_SOCKET_BAD, CURL_SOCKET_BAD, z)
- #define SOCKET_WRITABLE(x,z) \
- Curl_socket_check(CURL_SOCKET_BAD, CURL_SOCKET_BAD, x, z)
- int Curl_poll(struct pollfd ufds[], unsigned int nfds, timediff_t timeout_ms);
- int Curl_wait_ms(timediff_t timeout_ms);
- #ifdef TPF
- int tpf_select_libcurl(int maxfds, fd_set* reads, fd_set* writes,
- fd_set* excepts, struct timeval *tv);
- #endif
- /* TPF sockets are not in range [0..FD_SETSIZE-1], which
- unfortunately makes it impossible for us to easily check if they're valid
- With Winsock the valid range is [0..INVALID_SOCKET-1] according to
- https://docs.microsoft.com/en-us/windows/win32/winsock/socket-data-type-2
- */
- #if defined(TPF)
- #define VALID_SOCK(x) 1
- #define VERIFY_SOCK(x) Curl_nop_stmt
- #define FDSET_SOCK(x) 1
- #elif defined(USE_WINSOCK)
- #define VALID_SOCK(s) ((s) < INVALID_SOCKET)
- #define FDSET_SOCK(x) 1
- #define VERIFY_SOCK(x) do { \
- if(!VALID_SOCK(x)) { \
- SET_SOCKERRNO(WSAEINVAL); \
- return -1; \
- } \
- } while(0)
- #else
- #define VALID_SOCK(s) ((s) >= 0)
- /* If the socket is small enough to get set or read from an fdset */
- #define FDSET_SOCK(s) ((s) < FD_SETSIZE)
- #define VERIFY_SOCK(x) do { \
- if(!VALID_SOCK(x) || !FDSET_SOCK(x)) { \
- SET_SOCKERRNO(EINVAL); \
- return -1; \
- } \
- } while(0)
- #endif
- #endif /* HEADER_CURL_SELECT_H */
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