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https://github.com/jart/cosmopolitan.git
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dc0ea6640e
This change makes further effort towards improving our poll() implementation on the New Technology. The stdin worker didn't work out so well for Python so it's not being used for now. System call tracing with the --strace flag should now be less noisy now on Windows unless you modify the strace.internal.h defines to turn on some optional ones that are most useful for debugging the system call wrappers.
48 lines
2.8 KiB
C
48 lines
2.8 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net 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/calls/internal.h"
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#include "libc/calls/struct/iovec.h"
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#include "libc/nt/struct/overlapped.h"
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#include "libc/nt/winsock.h"
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#include "libc/sock/internal.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Performs datagram socket send on the New Technology.
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*
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* @param fd must be a socket
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* @return number of bytes handed off, or -1 w/ errno
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*/
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textwindows ssize_t sys_sendto_nt(int fd, const struct iovec *iov,
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size_t iovlen, uint32_t flags,
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void *opt_in_addr, uint32_t in_addrsize) {
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ssize_t rc;
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uint32_t sent = 0;
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struct NtIovec iovnt[16];
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struct NtOverlapped overlapped = {.hEvent = WSACreateEvent()};
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if (_check_interrupts(true, g_fds.p)) return eintr();
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if (!WSASendTo(g_fds.p[fd].handle, iovnt, __iovec2nt(iovnt, iov, iovlen),
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&sent, flags, opt_in_addr, in_addrsize, &overlapped, NULL)) {
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rc = sent;
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} else {
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rc = __wsablock(g_fds.p[fd].handle, &overlapped, &flags, true);
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}
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WSACloseEvent(overlapped.hEvent);
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return rc;
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}
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