Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

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

1 files changed, 75 insertions, 0 deletions

diff --git a/dom/cache/StreamControl.h b/dom/cache/StreamControl.h
new file mode 100644
index 0000000000..4a5cdfc309
--- /dev/null
+++ b/dom/cache/StreamControl.h
@@ -0,0 +1,75 @@
+/* -*- 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_dom_cache_StreamControl_h
+#define mozilla_dom_cache_StreamControl_h
+
+#include "mozilla/dom/cache/ReadStream.h"
+#include "mozilla/dom/cache/Types.h"
+#include "mozilla/RefPtr.h"
+#include "nsTObserverArray.h"
+
+struct nsID;
+
+namespace mozilla::dom::cache {
+
+class CacheReadStream;
+
+// Abstract class to help implement the stream control Child and Parent actors.
+// This provides an interface to partly help with serialization of IPC types,
+// but also an implementation for tracking ReadStream objects.
+class StreamControl {
+ public:
+  // abstract interface that must be implemented by child class
+  virtual void SerializeControl(CacheReadStream* aReadStreamOut) = 0;
+
+  virtual void SerializeStream(CacheReadStream* aReadStreamOut,
+                               nsIInputStream* aStream) = 0;
+
+  virtual void OpenStream(const nsID& aId, InputStreamResolver&& aResolver) = 0;
+
+  // inherited implementation of the ReadStream::Controllable list
+
+  // Begin controlling the given ReadStream.  This causes a strong ref to
+  // be held by the control.  The ReadStream must call NoteClosed() or
+  // ForgetReadStream() to release this ref.
+  void AddReadStream(SafeRefPtr<ReadStream::Controllable> aReadStream);
+
+  // Forget the ReadStream without notifying the actor.
+  void ForgetReadStream(SafeRefPtr<ReadStream::Controllable> aReadStream);
+
+  // Forget the ReadStream and then notify the actor the stream is closed.
+  void NoteClosed(SafeRefPtr<ReadStream::Controllable> aReadStream,
+                  const nsID& aId);
+
+ protected:
+  ~StreamControl();
+
+  void CloseAllReadStreams();
+
+  void CloseAllReadStreamsWithoutReporting();
+
+  bool HasEverBeenRead() const;
+
+  // protected parts of the abstract interface
+  virtual void NoteClosedAfterForget(const nsID& aId) = 0;
+
+#ifdef DEBUG
+  virtual void AssertOwningThread() = 0;
+#else
+  void AssertOwningThread() {}
+#endif
+
+ private:
+  // Hold strong references to ReadStream object.  When the stream is closed
+  // it should call NoteClosed() or ForgetReadStream() to release this ref.
+  using ReadStreamList = nsTObserverArray<SafeRefPtr<ReadStream::Controllable>>;
+  ReadStreamList mReadStreamList;
+};
+
+}  // namespace mozilla::dom::cache
+
+#endif  // mozilla_dom_cache_StreamControl_h