release semaphore

loading00123 · Dec 3, 2021 · baf0d2f · baf0d2f
1 parent 3e916f0
commit baf0d2f
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/FastGithub.DomainResolve/DnsClient.cs b/FastGithub.DomainResolve/DnsClient.cs
@@ -117,9 +117,9 @@ private async ValueTask<bool> IsDnsAvailableAsync(IPEndPoint dns, CancellationTo
                 return true;
             }
 
-            if (this.dnsStateCache.TryGetValue<bool>(dns, out var state))
+            if (this.dnsStateCache.TryGetValue<bool>(dns, out var available))
             {
-                return state;
+                return available;
             }
 
             var key = dns.ToString();
@@ -139,6 +139,10 @@ private async ValueTask<bool> IsDnsAvailableAsync(IPEndPoint dns, CancellationTo
                 cancellationToken.ThrowIfCancellationRequested();
                 return this.dnsStateCache.Set(dns, false, this.stateExpiration);
             }
+            finally
+            {
+                semaphore.Release();
+            }
         }
 
         /// <summary>