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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /gfx/layers/ipc/LayerTreeOwnerTracker.h
parentInitial commit. (diff)
downloadfirefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz
firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'gfx/layers/ipc/LayerTreeOwnerTracker.h')
-rw-r--r--gfx/layers/ipc/LayerTreeOwnerTracker.h73
1 files changed, 73 insertions, 0 deletions
diff --git a/gfx/layers/ipc/LayerTreeOwnerTracker.h b/gfx/layers/ipc/LayerTreeOwnerTracker.h
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+/* -*- 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_layers_LayerTreeOwnerTracker_h
+#define mozilla_layers_LayerTreeOwnerTracker_h
+
+#include "base/process.h" // for base::ProcessId
+#include "LayersTypes.h" // for LayersId
+#include "mozilla/Mutex.h" // for mozilla::Mutex
+
+#include <functional>
+#include <map>
+
+namespace mozilla {
+
+namespace dom {
+class ContentParent;
+}
+
+namespace layers {
+
+/**
+ * A utility class for tracking which content processes should be allowed
+ * to access which layer trees.
+ *
+ * ProcessId's are used to track which content process can access the layer
+ * tree, and in the case of nested browser's we use the top level content
+ * processes' ProcessId.
+ *
+ * This class is only available in the main process and gpu process. Mappings
+ * are synced from main process to the gpu process. The actual syncing happens
+ * in GPUProcessManager, and so this class should not be used directly.
+ */
+class LayerTreeOwnerTracker final {
+ public:
+ static void Initialize();
+ static void Shutdown();
+ static LayerTreeOwnerTracker* Get();
+
+ /**
+ * Map aLayersId and aProcessId together so that that process
+ * can access that layer tree.
+ */
+ void Map(LayersId aLayersId, base::ProcessId aProcessId);
+
+ /**
+ * Remove an existing mapping.
+ */
+ void Unmap(LayersId aLayersId, base::ProcessId aProcessId);
+
+ /**
+ * Checks whether it is okay for aProcessId to access aLayersId.
+ */
+ bool IsMapped(LayersId aLayersId, base::ProcessId aProcessId);
+
+ void Iterate(
+ const std::function<void(LayersId aLayersId, base::ProcessId aProcessId)>&
+ aCallback);
+
+ private:
+ LayerTreeOwnerTracker();
+
+ mozilla::Mutex mLayerIdsLock MOZ_UNANNOTATED;
+ std::map<LayersId, base::ProcessId> mLayerIds;
+};
+
+} // namespace layers
+} // namespace mozilla
+
+#endif // mozilla_layers_LayerTreeOwnerTracker_h