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-rw-r--r--mfbt/MemoryReporting.h30
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diff --git a/mfbt/MemoryReporting.h b/mfbt/MemoryReporting.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/. */
+
+/* Memory reporting infrastructure. */
+
+#ifndef mozilla_MemoryReporting_h
+#define mozilla_MemoryReporting_h
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+
+namespace mozilla {
+
+/*
+ * This is for functions that are like malloc_usable_size. Such functions are
+ * used for measuring the size of data structures.
+ */
+typedef size_t (*MallocSizeOf)(const void* p);
+
+} /* namespace mozilla */
+
+#endif /* __cplusplus */
+
+typedef size_t (*MozMallocSizeOf)(const void* p);
+
+#endif /* mozilla_MemoryReporting_h */