Global Resource Coordinator: Basic service internals

services/resource_coordinator/public/cpp/coordination_unit_id.cc

+// 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.
+
+#include "services/resource_coordinator/public/cpp/coordination_unit_id.h"
+
+#include "base/logging.h"
+#include "base/numerics/safe_conversions.h"
+#include "third_party/smhasher/src/MurmurHash2.h"
+
+namespace resource_coordinator {
+
+// The seed to use when taking the murmur2 hash of the id.
+const uint64_t kMurmur2HashSeed = 0;
+
+CoordinationUnitID::CoordinationUnitID()
+    : id(0), type(CoordinationUnitType::kInvalidType) {}
+
+CoordinationUnitID::CoordinationUnitID(const CoordinationUnitType& type,
+                                       const std::string& new_id)
+    : type(type) {
+  DCHECK(base::IsValueInRangeForNumericType<int>(new_id.size()));
+  if (!new_id.empty()) {
+    id = MurmurHash64A(&new_id.front(), static_cast<int>(new_id.size()),
+                       kMurmur2HashSeed);
+  } else {
+    id = 0;
+  }
+}
+
+}  // resource_coordinator