mirror of
https://github.com/jart/cosmopolitan.git
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87 lines
3.8 KiB
C
87 lines
3.8 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 2022 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/calls/internal.h"
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#include "libc/calls/sig.internal.h"
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#include "libc/errno.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/nt/enum/wait.h"
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#include "libc/nt/enum/wsa.h"
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#include "libc/nt/errors.h"
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#include "libc/nt/runtime.h"
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#include "libc/nt/thread.h"
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#include "libc/nt/winsock.h"
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#include "libc/runtime/runtime.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/sock/syscall_fd.internal.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/sysv/errfuns.h"
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textwindows int __wsablock(struct Fd *fd, struct NtOverlapped *overlapped,
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uint32_t *flags, bool restartable,
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uint32_t timeout) {
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int e, rc;
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uint32_t i, got;
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if (WSAGetLastError() != kNtErrorIoPending) {
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NTTRACE("sock i/o failed %s", strerror(errno));
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return __winsockerr();
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}
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if (fd->flags & O_NONBLOCK) {
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e = errno;
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_unassert(CancelIoEx(fd->handle, overlapped) ||
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WSAGetLastError() == kNtErrorNotFound);
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errno = e;
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} else {
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if (_check_interrupts(restartable, g_fds.p)) {
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return -1;
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}
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}
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for (;;) {
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i = WSAWaitForMultipleEvents(1, &overlapped->hEvent, true,
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__SIG_POLLING_INTERVAL_MS, true);
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if (i == kNtWaitFailed) {
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NTTRACE("WSAWaitForMultipleEvents failed %lm");
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return __winsockerr();
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} else if (i == kNtWaitTimeout || i == kNtWaitIoCompletion) {
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if (_check_interrupts(restartable, g_fds.p)) {
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return -1;
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}
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if (timeout) {
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if (timeout <= __SIG_POLLING_INTERVAL_MS) {
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NTTRACE("__wsablock timeout elapsed");
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return eagain();
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}
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timeout -= __SIG_POLLING_INTERVAL_MS;
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}
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} else {
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break;
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}
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}
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if (WSAGetOverlappedResult(fd->handle, overlapped, &got, false, flags)) {
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return got;
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} else if ((fd->flags & O_NONBLOCK) &&
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WSAGetLastError() == kNtErrorOperationAborted) {
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return eagain();
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} else {
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return -1;
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}
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}
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