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+//
+// GTMTimeUtils.h
+//
+// Copyright 2018 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
+//
+// http://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.
+//
+
+#import <Foundation/Foundation.h>
+
+// Return the date that the app was launched.
+NSDate *GTMAppLaunchDate(void);
+
+// Return the date that the device was started. Note on the simulator that this
+// returns the date that the computer was started, not the simulator.
+NSDate *GTMBootDate(void);
+
+// Convert a timeval to NSTimeInterval.
+NSTimeInterval GTMTimeValToNSTimeInterval(struct timeval time);
+
+// Timeval versions of the functions above if timevals are a more useful
+// structure to work with.
+struct timeval GTMBootTimeRelativeTo1970(void);
+struct timeval GTMAppLaunchTimeRelativeTo1970(void);
+