|  | /* | 
|  | *  Copyright 2016 The WebRTC project authors. All Rights Reserved. | 
|  | * | 
|  | *  Use of this source code is governed by a BSD-style license | 
|  | *  that can be found in the LICENSE file in the root of the source | 
|  | *  tree. An additional intellectual property rights grant can be found | 
|  | *  in the file PATENTS.  All contributing project authors may | 
|  | *  be found in the AUTHORS file in the root of the source tree. | 
|  | */ | 
|  |  | 
|  | #import <Foundation/Foundation.h> | 
|  |  | 
|  | #import "RTCMacros.h" | 
|  | #import "RTCMetricsSampleInfo.h" | 
|  |  | 
|  | /** | 
|  | * Enables gathering of metrics (which can be fetched with | 
|  | * RTCGetAndResetMetrics). Must be called before any other call into WebRTC. | 
|  | */ | 
|  | RTC_EXTERN void RTCEnableMetrics(void); | 
|  |  | 
|  | /** Gets and clears native histograms. */ | 
|  | RTC_EXTERN NSArray<RTC_OBJC_TYPE(RTCMetricsSampleInfo) *>* RTCGetAndResetMetrics(void); |