github.com/aquanetwork/aquachain@v1.7.8/internal/flock/flock_plan9.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 "os"
    17  
    18  type plan9Lock struct {
    19  	f *os.File
    20  }
    21  
    22  func (l *plan9Lock) Release() error {
    23  	return l.f.Close()
    24  }
    25  
    26  func newLock(fileName string) (Releaser, error) {
    27  	f, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE, os.ModeExclusive|0644)
    28  	if err != nil {
    29  		return nil, err
    30  	}
    31  	return &plan9Lock{f}, nil
    32  }