42 lines
1016 B
Go
42 lines
1016 B
Go
package lockingstore
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import (
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"github.com/tus/tusd"
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)
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// MemoryLocker persists locks using memory and therefore allowing a simple and
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// cheap mechansim. Locks will only exist as long as this object is kept in
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// reference and will be erased if the program exits.
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type MemoryLocker struct {
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locks map[string]bool
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}
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// New creates a new lock memory persistor.
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func NewMemoryLocker() *MemoryLocker {
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return &MemoryLocker{
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locks: make(map[string]bool),
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}
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}
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// LockUpload tries to obtain the exclusive lock.
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func (locker *MemoryLocker) LockUpload(id string) error {
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// Ensure file is not locked
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if _, ok := locker.locks[id]; ok {
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return tusd.ErrFileLocked
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}
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locker.locks[id] = true
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return nil
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}
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// UnlockUpload releases a lock. If no such lock exists, no error will be returned.
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func (locker *MemoryLocker) UnlockUpload(id string) error {
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// Deleting a non-existing key does not end in unexpected errors or panic
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// since this operation results in a no-op
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delete(locker.locks, id)
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return nil
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}
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