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31 lines
535 B
Go
31 lines
535 B
Go
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package slack
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import "sync"
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// IDGenerator provides an interface for generating integer ID values.
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type IDGenerator interface {
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Next() int
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}
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// NewSafeID returns a new instance of an IDGenerator which is safe for
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// concurrent use by multiple goroutines.
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func NewSafeID(startID int) IDGenerator {
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return &safeID{
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nextID: startID,
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mutex: &sync.Mutex{},
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}
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}
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type safeID struct {
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nextID int
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mutex *sync.Mutex
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}
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func (s *safeID) Next() int {
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s.mutex.Lock()
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defer s.mutex.Unlock()
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id := s.nextID
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s.nextID++
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return id
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}
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