Initial commit

vendor/github.com/cockroachdb/pebble/vfs/default_windows.go

@@ -0,0 +1,61 @@
+// Copyright 2023 The LevelDB-Go and Pebble Authors. All rights reserved. Use
+// of this source code is governed by a BSD-style license that can be found in
+// the LICENSE file.
+
+//go:build windows
+// +build windows
+
+package vfs
+
+import (
+	"os"
+	"syscall"
+
+	"github.com/cockroachdb/errors"
+)
+
+func wrapOSFileImpl(f *os.File) File {
+	return &windowsFile{f}
+}
+
+func (defaultFS) OpenDir(name string) (File, error) {
+	f, err := os.OpenFile(name, syscall.O_CLOEXEC, 0)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+	return &windowsDir{f}, nil
+}
+
+// Assert that windowsFile and windowsDir implement vfs.File.
+var (
+	_ File = (*windowsFile)(nil)
+	_ File = (*windowsDir)(nil)
+)
+
+type windowsDir struct {
+	*os.File
+}
+
+func (*windowsDir) Prefetch(offset int64, length int64) error { return nil }
+func (*windowsDir) Preallocate(off, length int64) error       { return nil }
+
+// Silently ignore Sync() on Windows. This is the same behavior as
+// RocksDB. See port/win/io_win.cc:WinDirectory::Fsync().
+func (*windowsDir) Sync() error                                    { return nil }
+func (*windowsDir) SyncData() error                                { return nil }
+func (*windowsDir) SyncTo(length int64) (fullSync bool, err error) { return false, nil }
+
+type windowsFile struct {
+	*os.File
+}
+
+func (*windowsFile) Prefetch(offset int64, length int64) error { return nil }
+func (*windowsFile) Preallocate(offset, length int64) error    { return nil }
+
+func (f *windowsFile) SyncData() error { return f.Sync() }
+func (f *windowsFile) SyncTo(length int64) (fullSync bool, err error) {
+	if err = f.Sync(); err != nil {
+		return false, err
+	}
+	return true, nil
+}