github.com/pingcap/br@v5.3.0-alpha.0.20220125034240-ec59c7b6ce30+incompatible/pkg/lightning/common/storage_windows.go (about)

     1  // Copyright 2019 PingCAP, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  // +build windows
    15  
    16  // TODO: Deduplicate this implementation with DM!
    17  
    18  package common
    19  
    20  import (
    21  	"syscall"
    22  	"unsafe"
    23  
    24  	"github.com/pingcap/errors"
    25  )
    26  
    27  var (
    28  	kernel32            = syscall.MustLoadDLL("kernel32.dll")
    29  	getDiskFreeSpaceExW = kernel32.MustFindProc("GetDiskFreeSpaceExW")
    30  )
    31  
    32  // GetStorageSize gets storage's capacity and available size
    33  func GetStorageSize(dir string) (size StorageSize, err error) {
    34  	r, _, e := getDiskFreeSpaceExW.Call(
    35  		uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(dir))),
    36  		uintptr(unsafe.Pointer(&size.Available)),
    37  		uintptr(unsafe.Pointer(&size.Capacity)),
    38  		0,
    39  	)
    40  	if r == 0 {
    41  		err = errors.Annotatef(e, "cannot get disk capacity at %s", dir)
    42  	}
    43  	return
    44  }
    45  
    46  // SameDisk is used to check dir1 and dir2 in the same disk.
    47  func SameDisk(dir1 string, dir2 string) (bool, error) {
    48  	// FIXME
    49  	return false, nil
    50  }