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