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1d4eb08fa1
This change introduces new tests for `O_NONBLOCK` and `SOCK_NONBLOCK` to
confirm that non-blocking i/o is now working on all supported platforms,
including Windows. For example, you can now say on Windows, MacOS, etc.:
socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, IPPROTO_TCP);
To create a non-blocking IPv4 TCP socket. Or you can enable non-blocking
i/o on an existing socket / pipe / etc. file descriptor by calling fcntl
fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
This functionality is polyfilled on older Linux kernels too, e.g. RHEL5.
Now that fcntl() support is much better the FIOCLEX / FIONCLEX polyfills
for ioctl() have been removed since they're ugly non-POSIX diameond APIs
This change fixes a weakness in kprintf() that was causing Windows trace
tools to frequently crash.
55 lines
3 KiB
C
55 lines
3 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/calls/internal.h"
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#include "libc/calls/struct/fd.internal.h"
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#include "libc/errno.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/nt/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/sock/syscall_fd.internal.h"
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#include "libc/sysv/errfuns.h"
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textwindows ssize_t sys_recv_nt(struct Fd *fd, const struct iovec *iov,
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size_t iovlen, uint32_t flags) {
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int err;
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ssize_t rc;
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uint32_t got = -666;
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struct SockFd *sockfd;
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struct NtIovec iovnt[16];
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if (_check_interrupts(true, g_fds.p)) return -1;
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struct NtOverlapped overlapped = {.hEvent = WSACreateEvent()};
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err = errno;
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if (!WSARecv(fd->handle, iovnt, __iovec2nt(iovnt, iov, iovlen), 0, &flags,
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&overlapped, 0)) {
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if (WSAGetOverlappedResult(fd->handle, &overlapped, &got, false, &flags)) {
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rc = got;
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} else {
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rc = -1;
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}
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} else {
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errno = err;
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sockfd = (struct SockFd *)fd->extra;
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rc = __wsablock(fd, &overlapped, &flags, true, sockfd->rcvtimeo);
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}
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_unassert(WSACloseEvent(overlapped.hEvent));
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return rc;
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}
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