import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

netwerk/dns/ChildDNSService.h

@@ -0,0 +1,60 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set sw=2 ts=8 et tw=80 : */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_net_ChildDNSService_h
+#define mozilla_net_ChildDNSService_h
+
+
+#include "nsPIDNSService.h"
+#include "nsIObserver.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/Mutex.h"
+#include "DNSRequestChild.h"
+#include "nsHashKeys.h"
+#include "nsClassHashtable.h"
+
+namespace mozilla {
+namespace net {
+
+class ChildDNSService final
+  : public nsPIDNSService
+  , public nsIObserver
+{
+public:
+  // AsyncResolve (and CancelAsyncResolve) can be called off-main
+  NS_DECL_THREADSAFE_ISUPPORTS
+  NS_DECL_NSPIDNSSERVICE
+  NS_DECL_NSIDNSSERVICE
+  NS_DECL_NSIOBSERVER
+
+  ChildDNSService();
+
+  static ChildDNSService* GetSingleton();
+
+  void NotifyRequestDone(DNSRequestChild *aDnsRequest);
+
+  bool GetOffline() const;
+private:
+  virtual ~ChildDNSService();
+
+  void MOZ_ALWAYS_INLINE GetDNSRecordHashKey(const nsACString &aHost,
+                                             uint32_t aFlags,
+                                             const nsACString &aNetworkInterface,
+                                             nsIDNSListener* aListener,
+                                             nsACString &aHashKey);
+
+  bool mFirstTime;
+  bool mDisablePrefetch;
+
+  // We need to remember pending dns requests to be able to cancel them.
+  nsClassHashtable<nsCStringHashKey, nsTArray<RefPtr<DNSRequestChild>>> mPendingRequests;
+  Mutex mPendingRequestsLock;
+};
+
+} // namespace net
+} // namespace mozilla
+
+#endif // mozilla_net_ChildDNSService_h