1 files changed, 125 insertions, 0 deletions
diff --git a/dom/cache/CacheStorageChild.cpp b/dom/cache/CacheStorageChild.cpp
new file mode 100644
index 0000000000..bd8eeeee24
--- /dev/null
+++ b/dom/cache/CacheStorageChild.cpp
@@ -0,0 +1,125 @@
+/* -*- 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/CacheStorageChild.h"
+
+#include "mozilla/Unused.h"
+#include "mozilla/dom/cache/CacheChild.h"
+#include "mozilla/dom/cache/CacheOpChild.h"
+#include "mozilla/dom/cache/CacheStorage.h"
+#include "mozilla/dom/cache/CacheWorkerRef.h"
+
+namespace mozilla::dom::cache {
+
+// declared in ActorUtils.h
+void DeallocPCacheStorageChild(PCacheStorageChild* aActor) { delete aActor; }
+
+CacheStorageChild::CacheStorageChild(CacheStorage* aListener,
+                                     SafeRefPtr<CacheWorkerRef> aWorkerRef)
+    : mListener(aListener), mNumChildActors(0), mDelayedDestroy(false) {
+  MOZ_COUNT_CTOR(cache::CacheStorageChild);
+  MOZ_DIAGNOSTIC_ASSERT(mListener);
+
+  SetWorkerRef(std::move(aWorkerRef));
+}
+
+CacheStorageChild::~CacheStorageChild() {
+  MOZ_COUNT_DTOR(cache::CacheStorageChild);
+  NS_ASSERT_OWNINGTHREAD(CacheStorageChild);
+  MOZ_DIAGNOSTIC_ASSERT(!mListener);
+}
+
+void CacheStorageChild::ClearListener() {
+  NS_ASSERT_OWNINGTHREAD(CacheStorageChild);
+  MOZ_DIAGNOSTIC_ASSERT(mListener);
+  mListener = nullptr;
+}
+
+void CacheStorageChild::ExecuteOp(nsIGlobalObject* aGlobal, Promise* aPromise,
+                                  nsISupports* aParent,
+                                  const CacheOpArgs& aArgs) {
+  mNumChildActors += 1;
+  Unused << SendPCacheOpConstructor(
+      new CacheOpChild(GetWorkerRefPtr().clonePtr(), aGlobal, aParent,
+                       aPromise),
+      aArgs);
+}
+
+void CacheStorageChild::StartDestroyFromListener() {
+  NS_ASSERT_OWNINGTHREAD(CacheStorageChild);
+
+  // The listener should be held alive by any async operations, so if it
+  // is going away then there must not be any child actors.  This in turn
+  // ensures that StartDestroy() will not trigger the delayed path.
+  MOZ_DIAGNOSTIC_ASSERT(!mNumChildActors);
+
+  StartDestroy();
+}
+
+void CacheStorageChild::StartDestroy() {
+  NS_ASSERT_OWNINGTHREAD(CacheStorageChild);
+
+  // If we have outstanding child actors, then don't destroy ourself yet.
+  // The child actors should be short lived and we should allow them to complete
+  // if possible.  NoteDeletedActor() will call back into this Shutdown()
+  // method when the last child actor is gone.
+  if (mNumChildActors) {
+    mDelayedDestroy = true;
+    return;
+  }
+
+  RefPtr<CacheStorage> listener = mListener;
+
+  // StartDestroy() can get called from either CacheStorage or the
+  // CacheWorkerRef.
+  // Theoretically we can get double called if the right race happens.  Handle
+  // that by just ignoring the second StartDestroy() call.
+  if (!listener) {
+    return;
+  }
+
+  listener->DestroyInternal(this);
+
+  // CacheStorage listener should call ClearListener() in DestroyInternal()
+  MOZ_DIAGNOSTIC_ASSERT(!mListener);
+
+  // Start actor destruction from parent process
+  Unused << SendTeardown();
+}
+
+void CacheStorageChild::ActorDestroy(ActorDestroyReason aReason) {
+  NS_ASSERT_OWNINGTHREAD(CacheStorageChild);
+  RefPtr<CacheStorage> listener = mListener;
+  if (listener) {
+    listener->DestroyInternal(this);
+    // CacheStorage listener should call ClearListener() in DestroyInternal()
+    MOZ_DIAGNOSTIC_ASSERT(!mListener);
+  }
+
+  RemoveWorkerRef();
+}
+
+PCacheOpChild* CacheStorageChild::AllocPCacheOpChild(
+    const CacheOpArgs& aOpArgs) {
+  MOZ_CRASH("CacheOpChild should be manually constructed.");
+  return nullptr;
+}
+
+bool CacheStorageChild::DeallocPCacheOpChild(PCacheOpChild* aActor) {
+  delete aActor;
+  NoteDeletedActor();
+  return true;
+}
+
+void CacheStorageChild::NoteDeletedActor() {
+  MOZ_DIAGNOSTIC_ASSERT(mNumChildActors);
+  mNumChildActors -= 1;
+  if (!mNumChildActors && mDelayedDestroy) {
+    StartDestroy();
+  }
+}
+
+}  // namespace mozilla::dom::cache