github.com/pingcap/tiflow@v0.0.0-20240520035814-5bf52d54e205/dm/pkg/utils/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  //go:build windows
    15  
    16  package utils
    17  
    18  import (
    19  	"syscall"
    20  	"unsafe"
    21  
    22  	"github.com/pingcap/tiflow/dm/pkg/terror"
    23  )
    24  
    25  var (
    26  	kernel32            = syscall.MustLoadDLL("kernel32.dll")
    27  	getDiskFreeSpaceExW = kernel32.MustFindProc("GetDiskFreeSpaceExW")
    28  )
    29  
    30  // GetStorageSize gets storage's capacity and available size
    31  func GetStorageSize(dir string) (size StorageSize, err error) {
    32  	r, _, e := getDiskFreeSpaceExW.Call(
    33  		uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(dir))),
    34  		uintptr(unsafe.Pointer(&size.Available)),
    35  		uintptr(unsafe.Pointer(&size.Capacity)),
    36  		0,
    37  	)
    38  	if r == 0 {
    39  		err = terror.ErrStatFileSize.Delegate(e)
    40  	}
    41  	return
    42  }