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https://github.com/coredns/coredns.git
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118b0c9408
This fixes a data race on the listener(s) that get started in the metrics plugins. It also restore pkg/uniq to its former glory and removes and state being carried in there; this means for metrics that registry.go was to replicate that behavior *with* locking (as pkg/uniq doesn't do, or need that). Also renamed uniqAddr to just u, to make it slightly shorter. Signed-off-by: Miek Gieben <miek@miek.nl>
29 lines
533 B
Go
29 lines
533 B
Go
package metrics
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import (
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"sync"
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"github.com/prometheus/client_golang/prometheus"
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)
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type reg struct {
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sync.RWMutex
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r map[string]*prometheus.Registry
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}
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func newReg() *reg { return ®{r: make(map[string]*prometheus.Registry)} }
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// update sets the registry if not already there and returns the input. Or it returns
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// a previous set value.
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func (r *reg) getOrSet(addr string, pr *prometheus.Registry) *prometheus.Registry {
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r.Lock()
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defer r.Unlock()
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if v, ok := r.r[addr]; ok {
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return v
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}
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r.r[addr] = pr
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return pr
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}
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