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package slack
import "sync/atomic"
// 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: int64(startID),
}
}
type safeID struct {
nextID int64
}
// make sure safeID implements the IDGenerator interface.
var _ IDGenerator = (*safeID)(nil)
// Next implements IDGenerator.Next.
func (s *safeID) Next() int {
id := atomic.AddInt64(&s.nextID, 1)
return int(id)
}
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