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-rw-r--r--dom/cache/CacheStreamControlChild.cpp159
1 files changed, 159 insertions, 0 deletions
diff --git a/dom/cache/CacheStreamControlChild.cpp b/dom/cache/CacheStreamControlChild.cpp
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index 000000000..b7ca3a0e7
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+++ b/dom/cache/CacheStreamControlChild.cpp
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+/* -*- 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/. */
+
+#include "mozilla/dom/cache/CacheStreamControlChild.h"
+
+#include "mozilla/Unused.h"
+#include "mozilla/dom/cache/ActorUtils.h"
+#include "mozilla/dom/cache/CacheTypes.h"
+#include "mozilla/dom/cache/ReadStream.h"
+#include "mozilla/ipc/FileDescriptorSetChild.h"
+#include "mozilla/ipc/PBackgroundChild.h"
+#include "mozilla/ipc/PFileDescriptorSetChild.h"
+#include "nsISupportsImpl.h"
+
+namespace mozilla {
+namespace dom {
+namespace cache {
+
+using mozilla::dom::OptionalFileDescriptorSet;
+using mozilla::ipc::AutoIPCStream;
+using mozilla::ipc::FileDescriptor;
+using mozilla::ipc::FileDescriptorSetChild;
+using mozilla::ipc::PFileDescriptorSetChild;
+
+// declared in ActorUtils.h
+PCacheStreamControlChild*
+AllocPCacheStreamControlChild()
+{
+ return new CacheStreamControlChild();
+}
+
+// declared in ActorUtils.h
+void
+DeallocPCacheStreamControlChild(PCacheStreamControlChild* aActor)
+{
+ delete aActor;
+}
+
+CacheStreamControlChild::CacheStreamControlChild()
+ : mDestroyStarted(false)
+ , mDestroyDelayed(false)
+{
+ MOZ_COUNT_CTOR(cache::CacheStreamControlChild);
+}
+
+CacheStreamControlChild::~CacheStreamControlChild()
+{
+ NS_ASSERT_OWNINGTHREAD(CacheStreamControlChild);
+ MOZ_COUNT_DTOR(cache::CacheStreamControlChild);
+}
+
+void
+CacheStreamControlChild::StartDestroy()
+{
+ NS_ASSERT_OWNINGTHREAD(CacheStreamControlChild);
+ // This can get called twice under some circumstances. For example, if the
+ // actor is added to a CacheWorkerHolder that has already been notified and
+ // the Cache actor has no mListener.
+ if (mDestroyStarted) {
+ return;
+ }
+ mDestroyStarted = true;
+
+ // If any of the streams have started to be read, then wait for them to close
+ // naturally.
+ if (HasEverBeenRead()) {
+ // Note that we are delaying so that we can re-check for active streams
+ // in NoteClosedAfterForget().
+ mDestroyDelayed = true;
+ return;
+ }
+
+ // Otherwise, if the streams have not been touched then just pre-emptively
+ // close them now. This handles the case where someone retrieves a Response
+ // from the Cache, but never accesses the body. We should not keep the
+ // Worker alive until that Response is GC'd just because of its ignored
+ // body stream.
+
+ // Begin shutting down all streams. This is the same as if the parent had
+ // asked us to shutdown. So simulate the CloseAll IPC message.
+ RecvCloseAll();
+}
+
+void
+CacheStreamControlChild::SerializeControl(CacheReadStream* aReadStreamOut)
+{
+ NS_ASSERT_OWNINGTHREAD(CacheStreamControlChild);
+ MOZ_DIAGNOSTIC_ASSERT(aReadStreamOut);
+ aReadStreamOut->controlParent() = nullptr;
+ aReadStreamOut->controlChild() = this;
+}
+
+void
+CacheStreamControlChild::SerializeStream(CacheReadStream* aReadStreamOut,
+ nsIInputStream* aStream,
+ nsTArray<UniquePtr<AutoIPCStream>>& aStreamCleanupList)
+{
+ NS_ASSERT_OWNINGTHREAD(CacheStreamControlChild);
+ MOZ_DIAGNOSTIC_ASSERT(aReadStreamOut);
+ MOZ_DIAGNOSTIC_ASSERT(aStream);
+ UniquePtr<AutoIPCStream> autoStream(new AutoIPCStream(aReadStreamOut->stream()));
+ autoStream->Serialize(aStream, Manager());
+ aStreamCleanupList.AppendElement(Move(autoStream));
+}
+
+void
+CacheStreamControlChild::NoteClosedAfterForget(const nsID& aId)
+{
+ NS_ASSERT_OWNINGTHREAD(CacheStreamControlChild);
+ Unused << SendNoteClosed(aId);
+
+ // A stream has closed. If we delayed StartDestry() due to this stream
+ // being read, then we should check to see if any of the remaining streams
+ // are active. If none of our other streams have been read, then we can
+ // proceed with the shutdown now.
+ if (mDestroyDelayed && !HasEverBeenRead()) {
+ mDestroyDelayed = false;
+ RecvCloseAll();
+ }
+}
+
+#ifdef DEBUG
+void
+CacheStreamControlChild::AssertOwningThread()
+{
+ NS_ASSERT_OWNINGTHREAD(CacheStreamControlChild);
+}
+#endif
+
+void
+CacheStreamControlChild::ActorDestroy(ActorDestroyReason aReason)
+{
+ NS_ASSERT_OWNINGTHREAD(CacheStreamControlChild);
+ CloseAllReadStreamsWithoutReporting();
+ RemoveWorkerHolder();
+}
+
+bool
+CacheStreamControlChild::RecvClose(const nsID& aId)
+{
+ NS_ASSERT_OWNINGTHREAD(CacheStreamControlChild);
+ CloseReadStreams(aId);
+ return true;
+}
+
+bool
+CacheStreamControlChild::RecvCloseAll()
+{
+ NS_ASSERT_OWNINGTHREAD(CacheStreamControlChild);
+ CloseAllReadStreams();
+ return true;
+}
+
+} // namespace cache
+} // namespace dom
+} // namespace mozilla