github.com/gochain-io/gochain@v2.2.26+incompatible/flock/flock_windows.go (about)

     1  // Copyright 2016 The Prometheus Authors
     2  // Licensed under the Apache License, Version 2.0 (the "License");
     3  // you may not use this file except in compliance with the License.
     4  // You may obtain a copy of the License at
     5  //
     6  //     http://www.apache.org/licenses/LICENSE-2.0
     7  //
     8  // Unless required by applicable law or agreed to in writing, software
     9  // distributed under the License is distributed on an "AS IS" BASIS,
    10  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package flock
    15  
    16  import "syscall"
    17  
    18  type windowsLock struct {
    19  	fd syscall.Handle
    20  }
    21  
    22  func (fl *windowsLock) Release() error {
    23  	return syscall.Close(fl.fd)
    24  }
    25  
    26  func newLock(fileName string) (Releaser, error) {
    27  	pathp, err := syscall.UTF16PtrFromString(fileName)
    28  	if err != nil {
    29  		return nil, err
    30  	}
    31  	fd, err := syscall.CreateFile(pathp, syscall.GENERIC_READ|syscall.GENERIC_WRITE, 0, nil, syscall.CREATE_ALWAYS, syscall.FILE_ATTRIBUTE_NORMAL, 0)
    32  	if err != nil {
    33  		return nil, err
    34  	}
    35  	return &windowsLock{fd}, nil
    36  }