shithub: mc

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Only allow one inflight DNS request.

	We only support threads a little bit.

--- a/lib/std/resolve+posixy.myr

+++ b/lib/std/resolve+posixy.myr

@@ -230,14 +230,17 @@

 	if !valid(host)

 		-> `Fail (`Badhost)

 	;;

+	lock(netlck)

 	for ns in nameservers

 		nsrv = dnsconnect(ns)

 		if nsrv >= 0

 			r = dnsquery(nsrv, host, rt)

 			sys.close(nsrv)

+			unlock(netlck)

 			-> r

 		;;

 	;;

+	unlock(netlck)

 	-> `Fail (`Badsrv)

 }