summaryrefslogtreecommitdiffstats
path: root/dom/cache/CacheWorkerRef.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'dom/cache/CacheWorkerRef.cpp')
-rw-r--r--dom/cache/CacheWorkerRef.cpp121
1 files changed, 121 insertions, 0 deletions
diff --git a/dom/cache/CacheWorkerRef.cpp b/dom/cache/CacheWorkerRef.cpp
new file mode 100644
index 0000000000..992de976e1
--- /dev/null
+++ b/dom/cache/CacheWorkerRef.cpp
@@ -0,0 +1,121 @@
+/* -*- 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/CacheWorkerRef.h"
+
+#include "mozilla/dom/cache/ActorChild.h"
+#include "mozilla/dom/WorkerPrivate.h"
+#include "mozilla/dom/WorkerRef.h"
+
+namespace mozilla::dom::cache {
+
+// static
+SafeRefPtr<CacheWorkerRef> CacheWorkerRef::Create(WorkerPrivate* aWorkerPrivate,
+ Behavior aBehavior) {
+ MOZ_DIAGNOSTIC_ASSERT(aWorkerPrivate);
+
+ // XXX This looks as if this could be simplified now by moving into the ctor
+ // of CacheWorkerRef, since we can now use SafeRefPtrFromThis in the ctor
+ auto workerRef =
+ MakeSafeRefPtr<CacheWorkerRef>(aBehavior, ConstructorGuard{});
+ auto notify = [workerRef = workerRef.clonePtr()] { workerRef->Notify(); };
+ if (aBehavior == eStrongWorkerRef) {
+ workerRef->mStrongWorkerRef = StrongWorkerRef::Create(
+ aWorkerPrivate, "CacheWorkerRef-Strong", std::move(notify));
+ } else {
+ MOZ_ASSERT(aBehavior == eIPCWorkerRef);
+ workerRef->mIPCWorkerRef = IPCWorkerRef::Create(
+ aWorkerPrivate, "CacheWorkerRef-IPC", std::move(notify));
+ }
+
+ if (NS_WARN_IF(!workerRef->mIPCWorkerRef && !workerRef->mStrongWorkerRef)) {
+ return nullptr;
+ }
+
+ return workerRef;
+}
+
+// static
+SafeRefPtr<CacheWorkerRef> CacheWorkerRef::PreferBehavior(
+ SafeRefPtr<CacheWorkerRef> aCurrentRef, Behavior aBehavior) {
+ if (!aCurrentRef) {
+ return nullptr;
+ }
+
+ SafeRefPtr<CacheWorkerRef> orig = std::move(aCurrentRef);
+ if (orig->mBehavior == aBehavior) {
+ return orig;
+ }
+
+ WorkerPrivate* workerPrivate = nullptr;
+ if (orig->mBehavior == eStrongWorkerRef) {
+ workerPrivate = orig->mStrongWorkerRef->Private();
+ } else {
+ MOZ_ASSERT(orig->mBehavior == eIPCWorkerRef);
+ workerPrivate = orig->mIPCWorkerRef->Private();
+ }
+
+ MOZ_ASSERT(workerPrivate);
+
+ SafeRefPtr<CacheWorkerRef> replace = Create(workerPrivate, aBehavior);
+ return static_cast<bool>(replace) ? std::move(replace) : std::move(orig);
+}
+
+void CacheWorkerRef::AddActor(ActorChild& aActor) {
+ NS_ASSERT_OWNINGTHREAD(CacheWorkerRef);
+ MOZ_ASSERT(!mActorList.Contains(&aActor));
+
+ mActorList.AppendElement(WrapNotNullUnchecked(&aActor));
+
+ // Allow an actor to be added after we've entered the Notifying case. We
+ // can't stop the actor creation from racing with out destruction of the
+ // other actors and we need to wait for this extra one to close as well.
+ // Signal it should destroy itself right away.
+ if (mNotified) {
+ aActor.StartDestroy();
+ }
+}
+
+void CacheWorkerRef::RemoveActor(ActorChild& aActor) {
+ NS_ASSERT_OWNINGTHREAD(CacheWorkerRef);
+
+#if defined(RELEASE_OR_BETA)
+ mActorList.RemoveElement(&aActor);
+#else
+ MOZ_DIAGNOSTIC_ASSERT(mActorList.RemoveElement(&aActor));
+#endif
+
+ MOZ_ASSERT(!mActorList.Contains(&aActor));
+
+ if (mActorList.IsEmpty()) {
+ mStrongWorkerRef = nullptr;
+ mIPCWorkerRef = nullptr;
+ }
+}
+
+bool CacheWorkerRef::Notified() const { return mNotified; }
+
+void CacheWorkerRef::Notify() {
+ NS_ASSERT_OWNINGTHREAD(CacheWorkerRef);
+
+ mNotified = true;
+
+ // Start the asynchronous destruction of our actors. These will call back
+ // into RemoveActor() once the actor is destroyed.
+ for (const auto& actor : mActorList) {
+ actor->StartDestroy();
+ }
+}
+
+CacheWorkerRef::CacheWorkerRef(Behavior aBehavior, ConstructorGuard)
+ : mBehavior(aBehavior), mNotified(false) {}
+
+CacheWorkerRef::~CacheWorkerRef() {
+ NS_ASSERT_OWNINGTHREAD(CacheWorkerRef);
+ MOZ_DIAGNOSTIC_ASSERT(mActorList.IsEmpty());
+}
+
+} // namespace mozilla::dom::cache