mirror of
https://github.com/jart/cosmopolitan.git
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fbc053e018
- Introduce __assert_disable global - Improve strsignal() thread safety - Make system call tracing thread safe - Fix SO_RCVTIMEO / SO_SNDTIMEO on Windows - Refactor DescribeFoo() functions into one place - Fix fork() on Windows when TLS and MAP_STACK exist - Round upwards in setsockopt(SO_RCVTIMEO) on Windows - Disable futexes on OpenBSD which seem extremely broken - Implement a better kludge for monotonic time on Windows
51 lines
2.9 KiB
C
51 lines
2.9 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/assert.h"
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#include "libc/errno.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/sock/sock.h"
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#include "libc/str/str.h"
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textwindows int64_t __winsockblock(int64_t fh, unsigned eventbit, int64_t rc,
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uint32_t timeout) {
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int64_t eh;
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struct NtWsaNetworkEvents ev;
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if (rc != -1) return rc;
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if (WSAGetLastError() != EWOULDBLOCK) return __winsockerr();
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eh = WSACreateEvent();
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bzero(&ev, sizeof(ev));
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/* The proper way to reset the state of an event object used with the
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WSAEventSelect function is to pass the handle of the event object
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to the WSAEnumNetworkEvents function in the hEventObject parameter.
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This will reset the event object and adjust the status of active FD
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events on the socket in an atomic fashion. -- MSDN */
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if (WSAEventSelect(fh, eh, 1u << eventbit) != -1 &&
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WSAEnumNetworkEvents(fh, eh, &ev) != -1) {
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if (!ev.iErrorCode[eventbit]) {
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rc = 0;
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} else {
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errno = ev.iErrorCode[eventbit];
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}
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} else {
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__winsockerr();
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}
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WSACloseEvent(eh);
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return rc;
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}
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