flock

func Lock ¶

func Lock(f *os.File) error

use fcntl POSIX locks for the most consistent behavior across platforms, and hopefully some compatibility over NFS and CIFS.

func LockBlocking ¶

func LockBlocking(ctx context.Context, f *os.File) error

LockBlocking is like Lock except that if the lock is currently contended then it blocks until it becomes available.

If the given context is cancelled then it returns early with the cancellation error.

func Unlock ¶

func Unlock(f *os.File) error