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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /dom/storage/SessionStorageObserver.h | |
parent | Initial commit. (diff) | |
download | thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'dom/storage/SessionStorageObserver.h')
-rw-r--r-- | dom/storage/SessionStorageObserver.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/dom/storage/SessionStorageObserver.h b/dom/storage/SessionStorageObserver.h new file mode 100644 index 0000000000..dee472cc9c --- /dev/null +++ b/dom/storage/SessionStorageObserver.h @@ -0,0 +1,63 @@ +/* -*- 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_SessionStorageObserver_h +#define mozilla_dom_SessionStorageObserver_h + +#include "nsISupportsImpl.h" + +namespace mozilla::dom { + +class SessionStorageObserverChild; + +/** + * Effectively just a refcounted life-cycle management wrapper around + * SessionStorageObserverChild which exists to receive chrome observer + * notifications from the main process. + * + * ## Lifecycle ## + * - Created by SessionStorageManager::SessionStorageManager. Placed in the + * gSessionStorageObserver variable for subsequent SessionStorageManager's via + * SessionStorageObserver::Get lookup. + * - The SessionStorageObserverChild directly handles "Observe" messages, + * shunting them directly to StorageObserver::Notify which distributes them to + * individual observer sinks. + * - Destroyed when refcount goes to zero due to all owning + * SessionStorageManager being destroyed. + */ +class SessionStorageObserver final { + friend class SessionStorageManager; + + SessionStorageObserverChild* mActor; + + public: + static SessionStorageObserver* Get(); + + NS_INLINE_DECL_REFCOUNTING(SessionStorageObserver) + + void AssertIsOnOwningThread() const { + NS_ASSERT_OWNINGTHREAD(SessionStorageObserver); + } + + void SetActor(SessionStorageObserverChild* aActor); + + void ClearActor() { + AssertIsOnOwningThread(); + MOZ_ASSERT(mActor); + + mActor = nullptr; + } + + private: + // Only created by SessionStorageManager. + SessionStorageObserver(); + + ~SessionStorageObserver(); +}; + +} // namespace mozilla::dom + +#endif // mozilla_dom_SessionStorageObserver_h |