Hulk did something

[bytom/vapor.git] / vendor / github.com / syndtr / goleveldb / leveldb / storage / file_storage_windows.go

diff --git a/vendor/github.com/syndtr/goleveldb/leveldb/storage/file_storage_windows.go b/vendor/github.com/syndtr/goleveldb/leveldb/storage/file_storage_windows.go
new file mode 100644 (file)
index 0000000..899335f
--- /dev/null
+++ b/vendor/github.com/syndtr/goleveldb/leveldb/storage/file_storage_windows.go
@@ -0,0 +1,78 @@
+// Copyright (c) 2013, Suryandaru Triandana <syndtr@gmail.com>
+// All rights reserved.
+//
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package storage
+
+import (
+       "syscall"
+       "unsafe"
+)
+
+var (
+       modkernel32 = syscall.NewLazyDLL("kernel32.dll")
+
+       procMoveFileExW = modkernel32.NewProc("MoveFileExW")
+)
+
+const (
+       _MOVEFILE_REPLACE_EXISTING = 1
+)
+
+type windowsFileLock struct {
+       fd syscall.Handle
+}
+
+func (fl *windowsFileLock) release() error {
+       return syscall.Close(fl.fd)
+}
+
+func newFileLock(path string, readOnly bool) (fl fileLock, err error) {
+       pathp, err := syscall.UTF16PtrFromString(path)
+       if err != nil {
+               return
+       }
+       var access, shareMode uint32
+       if readOnly {
+               access = syscall.GENERIC_READ
+               shareMode = syscall.FILE_SHARE_READ
+       } else {
+               access = syscall.GENERIC_READ | syscall.GENERIC_WRITE
+       }
+       fd, err := syscall.CreateFile(pathp, access, shareMode, nil, syscall.OPEN_EXISTING, syscall.FILE_ATTRIBUTE_NORMAL, 0)
+       if err == syscall.ERROR_FILE_NOT_FOUND {
+               fd, err = syscall.CreateFile(pathp, access, shareMode, nil, syscall.OPEN_ALWAYS, syscall.FILE_ATTRIBUTE_NORMAL, 0)
+       }
+       if err != nil {
+               return
+       }
+       fl = &windowsFileLock{fd: fd}
+       return
+}
+
+func moveFileEx(from *uint16, to *uint16, flags uint32) error {
+       r1, _, e1 := syscall.Syscall(procMoveFileExW.Addr(), 3, uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(to)), uintptr(flags))
+       if r1 == 0 {
+               if e1 != 0 {
+                       return error(e1)
+               }
+               return syscall.EINVAL
+       }
+       return nil
+}
+
+func rename(oldpath, newpath string) error {
+       from, err := syscall.UTF16PtrFromString(oldpath)
+       if err != nil {
+               return err
+       }
+       to, err := syscall.UTF16PtrFromString(newpath)
+       if err != nil {
+               return err
+       }
+       return moveFileEx(from, to, _MOVEFILE_REPLACE_EXISTING)
+}
+
+func syncDir(name string) error { return nil }