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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.
24 lines
515 B
Go
24 lines
515 B
Go
package flock
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import "syscall"
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type windowsLock struct {
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fd syscall.Handle
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}
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func (fl *windowsLock) Release() error {
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return syscall.Close(fl.fd)
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}
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func newLock(fileName string) (Releaser, error) {
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pathp, err := syscall.UTF16PtrFromString(fileName)
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if err != nil {
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return nil, err
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}
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fd, err := syscall.CreateFile(pathp, syscall.GENERIC_READ|syscall.GENERIC_WRITE, 0, nil, syscall.CREATE_ALWAYS, syscall.FILE_ATTRIBUTE_NORMAL, 0)
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if err != nil {
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return nil, err
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}
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return &windowsFileLock{fd}, nil
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}
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