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