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53 lines
3.1 KiB
C
53 lines
3.1 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/sock/select.h"
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#include "libc/calls/struct/timeval.h"
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/**
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* Checks status on multiple file descriptors at once.
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*
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* @param readfds may be used to be notified when you can call read() on
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* a file descriptor without it blocking; this includes when data is
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* is available to be read as well as eof and error conditions
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* @param writefds may be used to be notified when write() may be called
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* on a file descriptor without it blocking
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* @param exceptfds may be used to be notified of exceptional conditions
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* such as out-of-band data on a socket; it is equivalent to POLLPRI
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* in the revents of poll()
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* @param timeout may be null which means to block indefinitely; cosmo's
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* implementation of select() never modifies this parameter
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* @raise E2BIG if we exceeded the 64 socket limit on Windows
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* @raise ECANCELED if thread was cancelled in masked mode
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* @raise EINTR if signal was delivered
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* @cancelationpoint
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* @asyncsignalsafe
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* @norestart
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*/
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int select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
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struct timeval *timeout) {
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struct timespec ts;
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struct timespec *tsp;
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if (timeout) {
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ts = timeval_totimespec(*timeout);
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tsp = &ts;
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} else {
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tsp = 0;
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}
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return pselect(nfds, readfds, writefds, exceptfds, tsp, 0);
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}
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