| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "core/frame/LocalFrameLifecycleNotifier.h" |
| |
| #include "core/frame/LocalFrameLifecycleObserver.h" |
| |
| namespace blink { |
| |
| void LocalFrameLifecycleNotifier::notifyWillDetachFrameHost() |
| { |
| TemporaryChange<IterationType> scope(m_iterating, IteratingOverAll); |
| #if !ENABLE(OILPAN) |
| // Notifications perform unknown amounts of heap allocations, |
| // which might trigger (conservative) GCs. This will flush out |
| // dead observers, causing the _non-heap_ set be updated. Snapshot |
| // the observers and explicitly check if they're still alive before |
| // notifying. |
| Vector<RawPtr<LocalFrameLifecycleObserver>> snapshotOfObservers; |
| copyToVector(m_observers, snapshotOfObservers); |
| for (LocalFrameLifecycleObserver* observer : snapshotOfObservers) { |
| if (m_observers.contains(observer)) |
| observer->willDetachFrameHost(); |
| } |
| #else |
| for (LocalFrameLifecycleObserver* observer : m_observers) |
| observer->willDetachFrameHost(); |
| #endif |
| } |
| |
| } // namespace blink |
