Migrate Clock to third_party/nearby

PiperOrigin-RevId: 516972534

internal/platform/BUILD

@@ -303,6 +303,7 @@ cc_test(
 cc_library(
     name = "types",
     srcs = [
+        "clock_impl.cc",
         "device_info_impl.cc",
         "monitored_runnable.cc",
         "pending_job_registry.cc",
@@ -317,6 +318,8 @@ cc_library(
         "cancelable.h",
         "cancelable_alarm.h",
         "cancellable_task.h",
+        "clock.h",
+        "clock_impl.h",
         "condition_variable.h",
         "count_down_latch.h",
         "crypto.h",

internal/platform/clock.h

@@ -0,0 +1,30 @@
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef PLATFORM_PUBLIC_CLOCK_H_
+#define PLATFORM_PUBLIC_CLOCK_H_
+
+#include "absl/time/time.h"
+
+namespace nearby {
+
+class Clock {
+ public:
+  virtual ~Clock() = default;
+  virtual absl::Time Now() const = 0;
+};
+
+}  // namespace nearby
+
+#endif  // PLATFORM_PUBLIC_CLOCK_H_

internal/platform/clock_impl.cc

@@ -0,0 +1,23 @@
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "internal/platform/clock_impl.h"
+
+#include "absl/time/clock.h"
+
+namespace nearby {
+
+absl::Time ClockImpl::Now() const { return absl::Now(); }
+
+}  // namespace nearby

internal/platform/clock_impl.h

@@ -0,0 +1,30 @@
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef PLATFORM_PUBLIC_CLOCK_IMPL_H_
+#define PLATFORM_PUBLIC_CLOCK_IMPL_H_
+
+#include "absl/time/time.h"
+#include "internal/platform/clock.h"
+
+namespace nearby {
+
+class ClockImpl : public Clock {
+ public:
+  absl::Time Now() const override;
+};
+
+}  // namespace nearby
+
+#endif  // PLATFORM_PUBLIC_CLOCK_IMPL_H_