1 files changed, 74 insertions, 0 deletions
diff --git a/gfx/layers/ipc/LayerTransactionChild.h b/gfx/layers/ipc/LayerTransactionChild.h
new file mode 100644
index 0000000000..83ce36b022
--- /dev/null
+++ b/gfx/layers/ipc/LayerTransactionChild.h
@@ -0,0 +1,74 @@
+/* -*- 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_LAYERTRANSACTIONCHILD_H
+#define MOZILLA_LAYERS_LAYERTRANSACTIONCHILD_H
+
+#include <stdint.h>              // for uint32_t
+#include "mozilla/Attributes.h"  // for override
+#include "mozilla/ipc/ProtocolUtils.h"
+#include "mozilla/layers/PLayerTransactionChild.h"
+#include "mozilla/RefPtr.h"
+
+namespace mozilla {
+
+namespace layers {
+
+class ShadowLayerForwarder;
+
+class LayerTransactionChild : public PLayerTransactionChild {
+ public:
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(LayerTransactionChild)
+  /**
+   * Clean this up, finishing with SendShutDown() which will cause __delete__
+   * to be sent from the parent side.
+   *
+   * It is expected (checked with an assert) that all shadow layers
+   * created by this have already been destroyed and
+   * Send__delete__()d by the time this method is called.
+   */
+  void Destroy();
+
+  bool IPCOpen() const { return mIPCOpen && !mDestroyed; }
+  bool IsDestroyed() const { return mDestroyed; }
+
+  void SetForwarder(ShadowLayerForwarder* aForwarder) {
+    mForwarder = aForwarder;
+  }
+
+  LayersId GetId() const { return mId; }
+
+  void MarkDestroyed() { mDestroyed = true; }
+
+ protected:
+  explicit LayerTransactionChild(const LayersId& aId)
+      : mForwarder(nullptr), mIPCOpen(false), mDestroyed(false), mId(aId) {}
+  virtual ~LayerTransactionChild() = default;
+
+  void ActorDestroy(ActorDestroyReason why) override;
+
+  void AddIPDLReference() {
+    MOZ_ASSERT(mIPCOpen == false);
+    mIPCOpen = true;
+    AddRef();
+  }
+  void ReleaseIPDLReference() {
+    MOZ_ASSERT(mIPCOpen == true);
+    mIPCOpen = false;
+    Release();
+  }
+  friend class CompositorBridgeChild;
+
+  ShadowLayerForwarder* mForwarder;
+  bool mIPCOpen;
+  bool mDestroyed;
+  LayersId mId;
+};
+
+}  // namespace layers
+}  // namespace mozilla
+
+#endif  // MOZILLA_LAYERS_LAYERTRANSACTIONCHILD_H