1 files changed, 48 insertions, 0 deletions
diff --git a/gfx/layers/ipc/RefCountedShmem.h b/gfx/layers/ipc/RefCountedShmem.h
new file mode 100644
index 0000000000..390d6ea25f
--- /dev/null
+++ b/gfx/layers/ipc/RefCountedShmem.h
@@ -0,0 +1,48 @@
+/* -*- 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_REFCOUNTED_SHMEM_H
+#define MOZILLA_LAYERS_REFCOUNTED_SHMEM_H
+
+#include "mozilla/ipc/Shmem.h"
+#include "chrome/common/ipc_message_utils.h"
+
+namespace mozilla {
+namespace ipc {
+class IProtocol;
+}
+
+namespace layers {
+
+// This class is IPDL-defined
+class RefCountedShmem;
+
+// This just implement the methods externally.
+class RefCountedShm {
+ public:
+  static uint8_t* GetBytes(const RefCountedShmem& aShm);
+
+  static size_t GetSize(const RefCountedShmem& aShm);
+
+  static bool IsValid(const RefCountedShmem& aShm);
+
+  static bool Alloc(mozilla::ipc::IProtocol* aAllocator, size_t aSize,
+                    RefCountedShmem& aShm);
+
+  static void Dealloc(mozilla::ipc::IProtocol* aAllocator,
+                      RefCountedShmem& aShm);
+
+  static int32_t GetReferenceCount(const RefCountedShmem& aShm);
+
+  static int32_t AddRef(const RefCountedShmem& aShm);
+
+  static int32_t Release(const RefCountedShmem& aShm);
+};
+
+}  // namespace layers
+}  // namespace mozilla
+
+#endif