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internal/poll: advance file position in windows sendfile

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Some versions of Windows (Windows 10 1803) do not set file
position after TransmitFile completes. So just use Seek
to set file position before returning from sendfile.

Fixes #25722

Change-Id: I7a49be10304b5db19dda707b13ac93d338aeb190
Reviewed-on: https://go-review.googlesource.com/131976
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Yasuhiro MATSUMOTO <mattn.jp@gmail.com>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Alex Brainman 2018-08-26 16:45:10 +10:00
parent 09ea3c08e8
commit 8359b5e134
1 changed files with 6 additions and 0 deletions
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6
src/internal/poll/sendfile_windows.go
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@ -38,5 +38,11 @@ func SendFile(fd *FD, src syscall.Handle, n int64) (int64, error) {
done, err := wsrv.ExecIO(o, func(o *operation) error {
return syscall.TransmitFile(o.fd.Sysfd, o.handle, o.qty, 0, &o.o, nil, syscall.TF_WRITE_BEHIND)
})
if err == nil {
// Some versions of Windows (Windows 10 1803) do not set
// file position after TransmitFile completes.
// So just use Seek to set file position.
_, err = syscall.Seek(o.handle, curpos+int64(done), 0)
}
return int64(done), err
}