1 files changed, 67 insertions, 0 deletions
diff --git a/js/src/wasm/WasmUtility.h b/js/src/wasm/WasmUtility.h
new file mode 100644
index 0000000000..58b5c673f9
--- /dev/null
+++ b/js/src/wasm/WasmUtility.h
@@ -0,0 +1,67 @@
+/* -*- 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 wasm_utility_h
+#define wasm_utility_h
+
+#include "mozilla/Maybe.h"
+
+#include <algorithm>
+namespace js {
+namespace wasm {
+
+template <class Container1, class Container2>
+static inline bool EqualContainers(const Container1& lhs,
+                                   const Container2& rhs) {
+  return std::equal(lhs.begin(), lhs.end(), rhs.begin(), rhs.end());
+}
+
+#define WASM_DECLARE_POD_VECTOR(Type, VectorName)                      \
+  }                                                                    \
+  }                                                                    \
+  static_assert(std::is_trivially_copyable<js::wasm::Type>::value,     \
+                "Must be trivially copyable");                         \
+  static_assert(std::is_trivially_destructible<js::wasm::Type>::value, \
+                "Must be trivially destructible");                     \
+  namespace js {                                                       \
+  namespace wasm {                                                     \
+  typedef Vector<Type, 0, SystemAllocPolicy> VectorName;
+
+using mozilla::MallocSizeOf;
+
+template <class T>
+static inline size_t SizeOfVectorElementExcludingThis(
+    const T& elem, MallocSizeOf mallocSizeOf) {
+  return elem.sizeOfExcludingThis(mallocSizeOf);
+}
+
+template <class T>
+static inline size_t SizeOfVectorElementExcludingThis(
+    const RefPtr<T>& elem, MallocSizeOf mallocSizeOf) {
+  return elem->sizeOfExcludingThis(mallocSizeOf);
+}
+
+template <class T, size_t N>
+static inline size_t SizeOfVectorExcludingThis(
+    const mozilla::Vector<T, N, SystemAllocPolicy>& vec,
+    MallocSizeOf mallocSizeOf) {
+  size_t size = vec.sizeOfExcludingThis(mallocSizeOf);
+  for (const T& t : vec) {
+    size += SizeOfVectorElementExcludingThis(t, mallocSizeOf);
+  }
+  return size;
+}
+
+template <class T>
+static inline size_t SizeOfMaybeExcludingThis(const mozilla::Maybe<T>& maybe,
+                                              MallocSizeOf mallocSizeOf) {
+  return maybe ? maybe->sizeOfExcludingThis(mallocSizeOf) : 0;
+}
+
+}  // namespace wasm
+}  // namespace js
+
+#endif  // wasm_utility_h