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matterbridge/vendor/github.com/slack-go/slack/messageID.go

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