[mojo] Ports EDK

mojo/edk/system/ports/hash_functions.h

Index: mojo/edk/system/ports/hash_functions.h
diff --git a/mojo/edk/system/ports/hash_functions.h b/mojo/edk/system/ports/hash_functions.h
new file mode 100644
index 0000000000000000000000000000000000000000..3c91cb35929db6dff200cdd1480b50946086c001
--- /dev/null
+++ b/mojo/edk/system/ports/hash_functions.h
@@ -0,0 +1,34 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MOJO_EDK_SYSTEM_PORTS_HASH_FUNCTIONS_H_
+#define MOJO_EDK_SYSTEM_PORTS_HASH_FUNCTIONS_H_
+
+#include <functional>
+
+#include "mojo/edk/system/ports/name.h"
+
+namespace std {
+
+template <>
+struct hash<mojo::edk::ports::PortName> {
+  std::size_t operator()(const mojo::edk::ports::PortName& name) const {
+    size_t h1 = hash<uint64_t>()(name.v1);

[Anand Mistry (off Chromium), 2016/01/28 02:26:24]

Since avoid //base doesn't appear to be a goal for ports, please use
base::HashInts.

+    size_t h2 = hash<uint64_t>()(name.v2);
+    return h1 ^ (h2 << 1);
+  }
+};
+
+template <>
+struct hash<mojo::edk::ports::NodeName> {
+  std::size_t operator()(const mojo::edk::ports::NodeName& name) const {
+    size_t h1 = hash<uint64_t>()(name.v1);
+    size_t h2 = hash<uint64_t>()(name.v2);
+    return h1 ^ (h2 << 1);
+  }
+};
+
+}  // namespace std
+
+#endif  // MOJO_EDK_SYSTEM_PORTS_HASH_FUNCTIONS_H_