mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 15:03:34 +00:00
87a6669900
This change makes send() / sendto() always block on Windows. It's needed because poll(POLLOUT) doesn't guarantee a socket is immediately writable on Windows, and it caused rsync to fail because it made that assumption. The only exception is when a SO_SNDTIMEO is specified which will EAGAIN. Tests are added confirming MSG_WAITALL and MSG_NOSIGNAL work as expected on all our supported OSes. Most of the platform-specific MSG_FOO magnums have been deleted, with the exception of MSG_FASTOPEN. Your --strace log will now show MSG_FOO flags as symbols rather than numbers. I've also removed cv_wait_example_test because it's 0.3% flaky with Qemu under system load since it depends on a process being readily scheduled.
78 lines
3.6 KiB
C
78 lines
3.6 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/calls/internal.h"
|
|
#include "libc/calls/sig.internal.h"
|
|
#include "libc/calls/struct/iovec.internal.h"
|
|
#include "libc/calls/struct/sigset.internal.h"
|
|
#include "libc/errno.h"
|
|
#include "libc/nt/errors.h"
|
|
#include "libc/nt/struct/iovec.h"
|
|
#include "libc/nt/struct/overlapped.h"
|
|
#include "libc/nt/winsock.h"
|
|
#include "libc/sock/internal.h"
|
|
#include "libc/sysv/consts/sicode.h"
|
|
#include "libc/sysv/consts/sig.h"
|
|
#include "libc/sysv/errfuns.h"
|
|
#include "libc/vga/vga.internal.h"
|
|
#ifdef __x86_64__
|
|
|
|
#define _MSG_OOB 1
|
|
#define _MSG_DONTROUTE 4
|
|
#define _MSG_DONTWAIT 64
|
|
#define _MSG_NOSIGNAL 0x10000000
|
|
|
|
struct SendArgs {
|
|
const struct iovec *iov;
|
|
size_t iovlen;
|
|
struct NtIovec iovnt[16];
|
|
};
|
|
|
|
textwindows static int sys_send_nt_start(int64_t handle,
|
|
struct NtOverlapped *overlap,
|
|
uint32_t *flags, void *arg) {
|
|
struct SendArgs *args = arg;
|
|
return WSASend(handle, args->iovnt,
|
|
__iovec2nt(args->iovnt, args->iov, args->iovlen), 0, *flags,
|
|
overlap, 0);
|
|
}
|
|
|
|
textwindows ssize_t sys_send_nt(int fd, const struct iovec *iov, size_t iovlen,
|
|
uint32_t flags) {
|
|
if (flags & ~(_MSG_DONTWAIT | _MSG_OOB | _MSG_DONTROUTE | _MSG_NOSIGNAL))
|
|
return einval();
|
|
ssize_t rc;
|
|
struct Fd *f = g_fds.p + fd;
|
|
sigset_t waitmask = __sig_block();
|
|
|
|
rc = __winsock_block(f->handle, flags & ~(_MSG_DONTWAIT | _MSG_NOSIGNAL),
|
|
false, f->sndtimeo, waitmask, sys_send_nt_start,
|
|
&(struct SendArgs){iov, iovlen});
|
|
|
|
__sig_unblock(waitmask);
|
|
|
|
if (rc == -1 && errno == WSAESHUTDOWN) { // ESHUTDOWN
|
|
errno = kNtErrorBrokenPipe; // EPIPE
|
|
if (!(flags & _MSG_NOSIGNAL))
|
|
__sig_raise(SIGPIPE, SI_KERNEL);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
#endif /* __x86_64__ */
|