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metrics: add SetInt64 to ease using LabelMap for gauge metrics
Set is provided by the underlying Map. Signed-off-by: Maisem Ali <maisem@tailscale.com>
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@ -33,6 +33,11 @@ type LabelMap struct {
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expvar.Map
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}
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// SetInt64 sets the *Int value stored under the given map key.
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func (m *LabelMap) SetInt64(key string, v int64) {
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m.Get(key).Set(v)
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}
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// Get returns a direct pointer to the expvar.Int for key, creating it
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// if necessary.
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func (m *LabelMap) Get(key string) *expvar.Int {
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