mirror of
https://github.com/moparisthebest/curl
synced 2024-11-10 11:35:07 -05:00
5527417afa
This offers an alternative to the existing Curl_socket_ready() API which only checks one socket for read and one for write.
126 lines
3.4 KiB
C
126 lines
3.4 KiB
C
#ifndef __SELECT_H
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#define __SELECT_H
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/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at http://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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#include "setup.h"
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#ifdef HAVE_SYS_POLL_H
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#include <sys/poll.h>
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#elif defined(HAVE_POLL_H)
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#include <poll.h>
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#endif
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/*
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* poll() function on Windows Vista and later is called WSAPoll()
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*/
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#if defined(USE_WINSOCK) && (USE_WINSOCK > 1) && \
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defined(_WIN32_WINNT) && (_WIN32_WINNT >= 0x0600)
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# undef HAVE_POLL
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# define HAVE_POLL 1
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# undef HAVE_POLL_FINE
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# define HAVE_POLL_FINE 1
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# define poll(x,y,z) WSAPoll((x),(y),(z))
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# if defined(_MSC_VER) && defined(POLLRDNORM)
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# undef POLLPRI
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# define POLLPRI POLLRDBAND
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# define HAVE_STRUCT_POLLFD 1
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# endif
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#endif
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/*
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* Definition of pollfd struct and constants for platforms lacking them.
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*/
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#if !defined(HAVE_STRUCT_POLLFD) && \
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!defined(HAVE_SYS_POLL_H) && \
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!defined(HAVE_POLL_H)
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#define POLLIN 0x01
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#define POLLPRI 0x02
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#define POLLOUT 0x04
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#define POLLERR 0x08
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#define POLLHUP 0x10
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#define POLLNVAL 0x20
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struct pollfd
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{
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curl_socket_t fd;
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short events;
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short revents;
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};
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#endif
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#ifndef POLLRDNORM
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#define POLLRDNORM POLLIN
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#endif
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#ifndef POLLWRNORM
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#define POLLWRNORM POLLOUT
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#endif
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#ifndef POLLRDBAND
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#define POLLRDBAND POLLPRI
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#endif
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/* there are three CSELECT defines that are defined in the public header that
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are exposed to users, but this *IN2 bit is only ever used internally and
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therefore defined here */
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#define CURL_CSELECT_IN2 (CURL_CSELECT_ERR << 1)
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int Curl_socket_check(curl_socket_t readfd, curl_socket_t readfd2,
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curl_socket_t writefd,
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long timeout_ms);
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/* provide the former API internally */
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#define Curl_socket_ready(x,y,z) \
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Curl_socket_check(x, CURL_SOCKET_BAD, y, z)
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int Curl_poll(struct pollfd ufds[], unsigned int nfds, int timeout_ms);
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int Curl_wait_ms(int timeout_ms);
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#ifdef TPF
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int tpf_select_libcurl(int maxfds, fd_set* reads, fd_set* writes,
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fd_set* excepts, struct timeval* tv);
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#endif
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/* Winsock and TPF sockets are not in range [0..FD_SETSIZE-1], which
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unfortunately makes it impossible for us to easily check if they're valid
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*/
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#if defined(USE_WINSOCK) || defined(TPF)
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#define VALID_SOCK(x) 1
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#define VERIFY_SOCK(x) Curl_nop_stmt
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#else
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#define VALID_SOCK(s) (((s) >= 0) && ((s) < FD_SETSIZE))
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#define VERIFY_SOCK(x) do { \
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if(!VALID_SOCK(x)) { \
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SET_SOCKERRNO(EINVAL); \
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return -1; \
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} \
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} WHILE_FALSE
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#endif
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#endif /* __SELECT_H */
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