firebase-ios-sdk/Firebase/Database/FClock.h

/*
 * Copyright 2017 Google
 *
 * 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>

@protocol FClock <NSObject>

- (NSTimeInterval)currentTime;

@end

@interface FSystemClock : NSObject<FClock>

+ (FSystemClock *)clock;

@end

@interface FOffsetClock : NSObject<FClock>

- (id)initWithClock:(id<FClock>)clock offset:(NSTimeInterval)offset;

@end