Global Resource Coordinator: Basic service internals

services/resource_coordinator/public/cpp/coordination_unit_id.h

+// Copyright 2017 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 SERVICES_RESOURCE_COORDINATOR_PUBLIC_CPP_ID_H_
+#define SERVICES_RESOURCE_COORDINATOR_PUBLIC_CPP_ID_H_
+
+#include <string>
+
+#include "services/resource_coordinator/public/cpp/coordination_unit_types.h"
+
+namespace resource_coordinator {
+
+// This is a native struct rather than a mojom struct as we eventually want
+// to annotate base::TaskRunner with CUs for cost attribution purses and
+// would like to move it to base/ as easily as possible at that point.
+struct CoordinationUnitID {
+  CoordinationUnitID();
+  CoordinationUnitID(const CoordinationUnitType& type,
+                     const std::string& new_id);
+
+  bool operator==(const CoordinationUnitID& b) const {
+    return id == b.id && type == b.type;
+  }
+
+  int64_t id;
+  CoordinationUnitType type;
+};
+
+}  // resource_coordinator
+
+namespace std {
+
+template <>
+struct hash<resource_coordinator::CoordinationUnitID> {
+  uint64_t operator()(
+      const resource_coordinator::CoordinationUnitID& id) const {
+    return ((static_cast<uint64_t>(id.type)) << 32) | id.id;
+  }
+};
+
+}  // namespace std
+
+#endif  // SERVICES_RESOURCE_COORDINATOR_PUBLIC_CPP_ID_H_