Add m-esr52 at 52.6.0

1 files changed, 87 insertions, 0 deletions

diff --git a/gfx/layers/ipc/LayerTransactionChild.cpp b/gfx/layers/ipc/LayerTransactionChild.cpp
new file mode 100644
index 000000000..8b60d3b51
--- /dev/null
+++ b/gfx/layers/ipc/LayerTransactionChild.cpp
@@ -0,0 +1,87 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: sw=2 ts=8 et :
+ */
+/* 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/. */
+
+#include "LayerTransactionChild.h"
+#include "mozilla/gfx/Logging.h"
+#include "mozilla/layers/CompositableChild.h"
+#include "mozilla/layers/PCompositableChild.h"  // for PCompositableChild
+#include "mozilla/layers/PLayerChild.h"  // for PLayerChild
+#include "mozilla/layers/PImageContainerChild.h"
+#include "mozilla/layers/ShadowLayers.h"  // for ShadowLayerForwarder
+#include "mozilla/mozalloc.h"           // for operator delete, etc
+#include "nsDebug.h"                    // for NS_RUNTIMEABORT, etc
+#include "nsTArray.h"                   // for nsTArray
+#include "mozilla/layers/TextureClient.h"
+
+namespace mozilla {
+namespace layers {
+
+
+void
+LayerTransactionChild::Destroy()
+{
+  if (!IPCOpen()) {
+    return;
+  }
+  // mDestroyed is used to prevent calling Send__delete__() twice.
+  // When this function is called from CompositorBridgeChild::Destroy(),
+  // under Send__delete__() call, this function is called from
+  // ShadowLayerForwarder's destructor.
+  // When it happens, IPCOpen() is still true.
+  // See bug 1004191.
+  mDestroyed = true;
+
+  SendShutdown();
+}
+
+
+PLayerChild*
+LayerTransactionChild::AllocPLayerChild()
+{
+  // we always use the "power-user" ctor
+  NS_RUNTIMEABORT("not reached");
+  return nullptr;
+}
+
+bool
+LayerTransactionChild::DeallocPLayerChild(PLayerChild* actor)
+{
+  delete actor;
+  return true;
+}
+
+PCompositableChild*
+LayerTransactionChild::AllocPCompositableChild(const TextureInfo& aInfo)
+{
+  MOZ_ASSERT(!mDestroyed);
+  return CompositableChild::CreateActor();
+}
+
+bool
+LayerTransactionChild::DeallocPCompositableChild(PCompositableChild* actor)
+{
+  CompositableChild::DestroyActor(actor);
+  return true;
+}
+
+void
+LayerTransactionChild::ActorDestroy(ActorDestroyReason why)
+{
+  mDestroyed = true;
+#ifdef MOZ_B2G
+  // Due to poor lifetime management of gralloc (and possibly shmems) we will
+  // crash at some point in the future when we get destroyed due to abnormal
+  // shutdown. Its better just to crash here. On desktop though, we have a chance
+  // of recovering.
+  if (why == AbnormalShutdown) {
+    NS_RUNTIMEABORT("ActorDestroy by IPC channel failure at LayerTransactionChild");
+  }
+#endif
+}
+
+} // namespace layers
+} // namespace mozilla