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tpl/partials: Fix the lock contention in cached partial

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Fixes #4086
This commit is contained in:
Bjørn Erik Pedersen 2017-11-16 11:59:45 +01:00
parent e66d813bcb
commit 6233ddf9d1
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GPG key ID: 330E6E2BD4859D8F
1 changed files with 6 additions and 8 deletions
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14
tpl/partials/partials.go
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@ -120,19 +120,17 @@ func (ns *Namespace) getOrCreate(key, name string, context interface{}) (interfa
return p, nil return p, nil
} }
ns.cachedPartials.Lock()
defer ns.cachedPartials.Unlock()
// Double-check.
if p, ok = ns.cachedPartials.p[key]; ok {
return p, nil
}
p, err := ns.Include(name, context) p, err := ns.Include(name, context)
if err != nil { if err != nil {
return nil, err return nil, err
} }
ns.cachedPartials.Lock()
defer ns.cachedPartials.Unlock()
// Double-check.
if p2, ok := ns.cachedPartials.p[key]; ok {
return p2, nil
}
ns.cachedPartials.p[key] = p ns.cachedPartials.p[key] = p
return p, nil return p, nil