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Annotation of embedaddon/curl/lib/select.h, revision 1.1

1.1     ! misho       1: #ifndef HEADER_CURL_SELECT_H
        !             2: #define HEADER_CURL_SELECT_H
        !             3: /***************************************************************************
        !             4:  *                                  _   _ ____  _
        !             5:  *  Project                     ___| | | |  _ \| |
        !             6:  *                             / __| | | | |_) | |
        !             7:  *                            | (__| |_| |  _ <| |___
        !             8:  *                             \___|\___/|_| \_\_____|
        !             9:  *
        !            10:  * Copyright (C) 1998 - 2020, 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_POLL_H
        !            28: #include <poll.h>
        !            29: #elif defined(HAVE_SYS_POLL_H)
        !            30: #include <sys/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:     !defined(POLLIN)
        !            41: 
        !            42: #define POLLIN      0x01
        !            43: #define POLLPRI     0x02
        !            44: #define POLLOUT     0x04
        !            45: #define POLLERR     0x08
        !            46: #define POLLHUP     0x10
        !            47: #define POLLNVAL    0x20
        !            48: 
        !            49: struct pollfd
        !            50: {
        !            51:     curl_socket_t fd;
        !            52:     short   events;
        !            53:     short   revents;
        !            54: };
        !            55: 
        !            56: #endif
        !            57: 
        !            58: #ifndef POLLRDNORM
        !            59: #define POLLRDNORM POLLIN
        !            60: #endif
        !            61: 
        !            62: #ifndef POLLWRNORM
        !            63: #define POLLWRNORM POLLOUT
        !            64: #endif
        !            65: 
        !            66: #ifndef POLLRDBAND
        !            67: #define POLLRDBAND POLLPRI
        !            68: #endif
        !            69: 
        !            70: /* there are three CSELECT defines that are defined in the public header that
        !            71:    are exposed to users, but this *IN2 bit is only ever used internally and
        !            72:    therefore defined here */
        !            73: #define CURL_CSELECT_IN2 (CURL_CSELECT_ERR << 1)
        !            74: 
        !            75: int Curl_select(curl_socket_t maxfd,
        !            76:                 fd_set *fds_read,
        !            77:                 fd_set *fds_write,
        !            78:                 fd_set *fds_err,
        !            79:                 time_t timeout_ms);
        !            80: 
        !            81: int Curl_socket_check(curl_socket_t readfd, curl_socket_t readfd2,
        !            82:                       curl_socket_t writefd,
        !            83:                       timediff_t timeout_ms);
        !            84: #define SOCKET_READABLE(x,z) \
        !            85:   Curl_socket_check(x, CURL_SOCKET_BAD, CURL_SOCKET_BAD, z)
        !            86: #define SOCKET_WRITABLE(x,z) \
        !            87:   Curl_socket_check(CURL_SOCKET_BAD, CURL_SOCKET_BAD, x, z)
        !            88: 
        !            89: int Curl_poll(struct pollfd ufds[], unsigned int nfds, int timeout_ms);
        !            90: int Curl_wait_ms(int timeout_ms);
        !            91: 
        !            92: #ifdef TPF
        !            93: int tpf_select_libcurl(int maxfds, fd_set* reads, fd_set* writes,
        !            94:                        fd_set* excepts, struct timeval* tv);
        !            95: #endif
        !            96: 
        !            97: /* Winsock and TPF sockets are not in range [0..FD_SETSIZE-1], which
        !            98:    unfortunately makes it impossible for us to easily check if they're valid
        !            99: */
        !           100: #if defined(USE_WINSOCK) || defined(TPF)
        !           101: #define VALID_SOCK(x) 1
        !           102: #define VERIFY_SOCK(x) Curl_nop_stmt
        !           103: #else
        !           104: #define VALID_SOCK(s) (((s) >= 0) && ((s) < FD_SETSIZE))
        !           105: #define VERIFY_SOCK(x) do { \
        !           106:   if(!VALID_SOCK(x)) { \
        !           107:     SET_SOCKERRNO(EINVAL); \
        !           108:     return -1; \
        !           109:   } \
        !           110: } while(0)
        !           111: #endif
        !           112: 
        !           113: #endif /* HEADER_CURL_SELECT_H */