From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 netwerk/protocol/websocket/IPCTransportProvider.h | 92 +++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 netwerk/protocol/websocket/IPCTransportProvider.h

(limited to 'netwerk/protocol/websocket/IPCTransportProvider.h')

diff --git a/netwerk/protocol/websocket/IPCTransportProvider.h b/netwerk/protocol/websocket/IPCTransportProvider.h
new file mode 100644
index 000000000..343d3c038
--- /dev/null
+++ b/netwerk/protocol/websocket/IPCTransportProvider.h
@@ -0,0 +1,92 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set sw=2 ts=8 et ft=cpp : */
+/* 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_IPCTransportProvider_h
+#define mozilla_net_IPCTransportProvider_h
+
+#include "nsISupportsImpl.h"
+#include "mozilla/net/PTransportProviderParent.h"
+#include "mozilla/net/PTransportProviderChild.h"
+#include "nsIHttpChannelInternal.h"
+#include "nsITransportProvider.h"
+
+/*
+ * No, the ownership model for TransportProvider is that the child object is
+ * refcounted "normally". I.e. ipdl code doesn't hold a strong reference to
+ * TransportProviderChild.
+ *
+ * When TransportProviderChild goes away, it sends a __delete__ message to the
+ * parent.
+ *
+ * On the parent side, ipdl holds a strong reference to TransportProviderParent.
+ * When the actor is deallocatde it releases the reference to the
+ * TransportProviderParent.
+ *
+ * So effectively the child holds a strong reference to the parent, and are
+ * otherwise normally refcounted and have their lifetime determined by that
+ * refcount.
+ *
+ * The only other caveat is that the creation happens from the parent.
+ * So to create a TransportProvider, a constructor is sent from the parent to
+ * the child. At this time the child gets its first addref.
+ *
+ * A reference to the TransportProvider is then sent as part of some other
+ * message from the parent to the child. For example in the
+ * PFlyWebPublishedServer.WebSocketRequest message.
+ *
+ * The receiver of that message can then grab the TransportProviderChild and
+ * without addreffing it, effectively using the refcount that the
+ * TransportProviderChild got on creation.
+ */
+
+class nsISocketTransport;
+class nsIAsyncInputStream;
+class nsIAsyncOutputStream;
+
+namespace mozilla {
+namespace net {
+
+class TransportProviderParent final : public PTransportProviderParent
+                                    , public nsITransportProvider
+                                    , public nsIHttpUpgradeListener
+{
+public:
+  TransportProviderParent();
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSITRANSPORTPROVIDER
+  NS_DECL_NSIHTTPUPGRADELISTENER
+
+  void ActorDestroy(ActorDestroyReason aWhy) override {};
+
+private:
+  ~TransportProviderParent();
+
+  void MaybeNotify();
+
+  nsCOMPtr<nsIHttpUpgradeListener> mListener;
+  nsCOMPtr<nsISocketTransport> mTransport;
+  nsCOMPtr<nsIAsyncInputStream> mSocketIn;
+  nsCOMPtr<nsIAsyncOutputStream> mSocketOut;
+};
+
+class TransportProviderChild final : public PTransportProviderChild
+                                   , public nsITransportProvider
+{
+public:
+  TransportProviderChild();
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSITRANSPORTPROVIDER
+
+private:
+  ~TransportProviderChild();
+};
+
+} // namespace net
+} // namespace mozilla
+
+#endif
-- 
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