mirror of
https://github.com/jart/cosmopolitan.git
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49b0eaa69f
- On Windows connect() can now be interrupted by a signal; connect() w/ O_NONBLOCK will now raise EINPROGRESS; and connect() with SO_SNDTIMEO will raise ETIMEDOUT after the interval has elapsed. - We now get the AcceptEx(), ConnectEx(), and TransmitFile() functions from the WIN32 API the officially blessed way, using WSAIoctl(). - Do nothing on Windows when fsync() is called on a directory handle. This was raising EACCES earlier becaues GENERIC_WRITE is required on the handle. It's possible to FlushFileBuffers() a directory handle if it's opened with write access but MSDN doesn't document what it does. If you have any idea, please let us know! - Prefer manual reset event objects for read() and write() on Windows. - Do some code cleanup on our dlmalloc customizations. - Fix errno type error in Windows blocking routines. - Make the futex polyfill simpler and faster.
45 lines
2.8 KiB
C
45 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/syscall_support-nt.internal.h"
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#include "libc/nt/enum/fileflagandattributes.h"
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#include "libc/nt/enum/filetype.h"
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#include "libc/nt/files.h"
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#include "libc/nt/struct/byhandlefileinformation.h"
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#include "libc/sysv/errfuns.h"
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#ifdef __x86_64__
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textwindows int sys_fdatasync_nt(int fd, bool fake) {
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struct NtByHandleFileInformation wst;
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if (!__isfdopen(fd)) return ebadf();
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if (!__isfdkind(fd, kFdFile)) return einval();
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if (GetFileType(g_fds.p[fd].handle) != kNtFileTypeDisk) return einval();
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if (!GetFileInformationByHandle(g_fds.p[fd].handle, &wst)) return __winerr();
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if (wst.dwFileAttributes & kNtFileAttributeDirectory) {
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// Flushing a directory handle is possible, but it needs
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// kNtGenericWrite access, and MSDN doesn't document it.
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return 0;
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}
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if (_check_cancel() == -1) return -1;
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if (_check_signal(false) == -1) return -1;
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if (fake) return 0;
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return FlushFileBuffers(g_fds.p[fd].handle) ? 0 : __winerr();
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}
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#endif /* __x86_64__ */
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