29 lines
758 B
Go
29 lines
758 B
Go
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package metrics
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import (
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"strconv"
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"sync/atomic"
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)
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// The Counter type represents a numeric counter that is safe to use from concurrent goroutines.
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type Counter struct {
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val int64
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desc *desc
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}
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// Name identifies the name of the counter.
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func (c *Counter) Name() string { return c.desc.Name }
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// Value atomically returns the current value of the counter.
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func (c *Counter) Value() int64 { return atomic.LoadInt64(&c.val) }
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// Add atomically adds d to the counter.
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func (c *Counter) Add(d int64) { atomic.AddInt64(&c.val, d) }
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// String returns a string representation using the name and value of the counter.
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func (c *Counter) String() string {
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var buf [16]byte
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v := strconv.AppendInt(buf[:0], c.val, 10)
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return c.desc.Name + ": " + string(v)
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}
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