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baca6faa1c
This mimics the locking leveldb is performing anyway. Advantages of doing it separately: - Should we ever replace the leveldb implementation by one without double-start protection, we are still good. - In contrast to leveldb, the new code creates a meaningful error message.
20 lines
320 B
Go
20 lines
320 B
Go
package flock
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import "os"
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type plan9Lock struct {
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f *os.File
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}
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func (l *plan9Lock) Release() error {
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return l.f.Close()
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}
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func newLock(fileName string) (Releaser, error) {
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f, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE, os.ModeExclusive|0644)
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if err != nil {
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return nil, err
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}
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return &plan9Lock{f}, nil
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}
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