go func(cleanup func()) {
		for {
			<-uniqueMapCleanup
			cleanup()
		}
	}(f)
}

func clearpools() {
	// clear sync.Pools
	if poolcleanup != nil {
		poolcleanup()
	}

	// clear boringcrypto caches
	for _, p := range boringCaches {
		atomicstorep(p, nil)
	}

	// clear unique maps
	if uniqueMapCleanup != nil {
		select {