Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 95 insertions, 0 deletions

diff --git a/ipc/glue/IPCStreamDestination.h b/ipc/glue/IPCStreamDestination.h
new file mode 100644
index 0000000000..8bd0cb3f87
--- /dev/null
+++ b/ipc/glue/IPCStreamDestination.h
@@ -0,0 +1,95 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 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_ipc_IPCStreamDestination_h
+#define mozilla_ipc_IPCStreamDestination_h
+
+#include "mozilla/AlreadyAddRefed.h"
+#include "nsIRunnable.h"
+#include "nsIThread.h"
+
+class nsIInputStream;
+class nsIAsyncInputStream;
+class nsIAsyncOutputStream;
+
+namespace mozilla {
+
+namespace wr {
+struct ByteBuffer;
+}  // namespace wr
+
+namespace ipc {
+
+class PChildToParentStreamParent;
+class PParentToChildStreamChild;
+
+// On the destination side, you must simply call TakeReader() upon receiving a
+// reference to the IPCStream{Child,Parent} actor.  You do not need to maintain
+// a reference to the actor itself.
+class IPCStreamDestination {
+ public:
+  static IPCStreamDestination* Cast(PChildToParentStreamParent* aActor);
+
+  static IPCStreamDestination* Cast(PParentToChildStreamChild* aActor);
+
+  void SetDelayedStart(bool aDelayedStart);
+
+  void SetLength(int64_t aLength);
+
+  already_AddRefed<nsIInputStream> TakeReader();
+
+  bool IsOnOwningThread() const;
+
+  void DispatchRunnable(already_AddRefed<nsIRunnable>&& aRunnable);
+
+ protected:
+  IPCStreamDestination();
+  virtual ~IPCStreamDestination();
+
+  nsresult Initialize();
+
+  // The implementation of the actor should call these methods.
+
+  void ActorDestroyed();
+
+  void BufferReceived(const wr::ByteBuffer& aBuffer);
+
+  void CloseReceived(nsresult aRv);
+
+#ifdef DEBUG
+  bool HasDelayedStart() const { return mDelayedStart; }
+#endif
+
+  // These methods will be implemented by the actor.
+
+  virtual void StartReading() = 0;
+
+  virtual void RequestClose(nsresult aRv) = 0;
+
+  virtual void TerminateDestination() = 0;
+
+ private:
+  nsCOMPtr<nsIAsyncInputStream> mReader;
+  nsCOMPtr<nsIAsyncOutputStream> mWriter;
+
+  // This is created by TakeReader() if we need to delay the reading of data.
+  // We keep a reference to the stream in order to inform it when the actor goes
+  // away. If that happens, the reading of data will not be possible anymore.
+  class DelayedStartInputStream;
+  RefPtr<DelayedStartInputStream> mDelayedStartInputStream;
+
+  nsCOMPtr<nsIThread> mOwningThread;
+  bool mDelayedStart;
+
+#ifdef MOZ_DEBUG
+  bool mLengthSet;
+#endif
+};
+
+}  // namespace ipc
+}  // namespace mozilla
+
+#endif  // mozilla_ipc_IPCStreamDestination_h