summaryrefslogtreecommitdiffstats
path: root/dom/locks/LockManagerChild.h
diff options
context:
space:
mode:
Diffstat (limited to 'dom/locks/LockManagerChild.h')
-rw-r--r--dom/locks/LockManagerChild.h64
1 files changed, 64 insertions, 0 deletions
diff --git a/dom/locks/LockManagerChild.h b/dom/locks/LockManagerChild.h
new file mode 100644
index 0000000000..79ae8390e3
--- /dev/null
+++ b/dom/locks/LockManagerChild.h
@@ -0,0 +1,64 @@
+/* -*- 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 DOM_LOCKS_LOCKMANAGERCHILD_H_
+#define DOM_LOCKS_LOCKMANAGERCHILD_H_
+
+#include "mozilla/dom/locks/PLockManagerChild.h"
+#include "mozilla/dom/Promise.h"
+#include "mozilla/dom/WorkerRef.h"
+#include "nsIUUIDGenerator.h"
+
+namespace mozilla::dom::locks {
+
+struct LockRequest;
+
+class LockManagerChild final : public PLockManagerChild {
+ public:
+ NS_INLINE_DECL_REFCOUNTING(LockManagerChild)
+
+ static void NotifyBFCacheOnMainThread(nsPIDOMWindowInner* aInner,
+ bool aCreated);
+
+ explicit LockManagerChild(nsIGlobalObject* aOwner);
+
+ nsIGlobalObject* GetParentObject() const { return mOwner; };
+
+ void RequestLock(const LockRequest& aRequest, const LockOptions& aOptions);
+
+ void NotifyRequestDestroy() const;
+
+ void NotifyToWindow(bool aCreated) const;
+
+ private:
+ ~LockManagerChild() = default;
+
+ nsCOMPtr<nsIGlobalObject> mOwner;
+
+ // This WorkerRef is deleted by destructor.
+ //
+ // Here we want to make sure the IPC layer deletes the actor before allowing
+ // WorkerPrivate deletion, since managed LockRequestChild holds a reference to
+ // global object (currently via mRequest member variable) and thus deleting
+ // the worker first causes an assertion failure. Having this ensures that all
+ // LockRequestChild instances must first have been deleted.
+ //
+ // (Because each LockRequestChild's ActorLifecycleProxy will hold
+ // a strong reference to its manager LockManagerChild's ActorLifecycleProxy,
+ // which means that the LockManagerChild will only be destroyed once all
+ // LockRequestChild instances have been destroyed. At that point, all
+ // references to the global should have been dropped, and then the
+ // LockManagerChild IPCWorkerRef will be dropped and the worker will be able
+ // to transition to the Killing state.)
+ //
+ // ActorDestroy can't release this since it does not guarantee to destruct and
+ // GC the managees (LockRequestChild) immediately.
+ RefPtr<IPCWorkerRef> mWorkerRef;
+};
+
+} // namespace mozilla::dom::locks
+
+#endif // DOM_LOCKS_LOCKMANAGERCHILD_H_