firebase-ios-sdk/FirebasePerformance/Sources/FIRPerformance_Private.h

// Copyright 2020 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 "FirebasePerformance/Sources/FPRClient.h"
#import "FirebasePerformance/Sources/Public/FirebasePerformance/FIRPerformance.h"

#import "FirebaseCore/Sources/Private/FirebaseCoreInternal.h"

#import "Interop/Crashlytics/Public/FIRCrashlyticsInterop.h"

/// Empty protocol to register with FirebaseCore's component system.
@protocol FIRPerformanceInstanceProvider <NSObject>
@end

/**
 * Extension that is added on top of the class FIRPerformances to make the private properties
 * visible between the implementation file and the unit tests.
 */
@interface FIRPerformance () <FIRLibrary, FIRPerformanceInstanceProvider>

/** Custom attribute managed internally. */
@property(nonatomic) NSMutableDictionary<NSString *, NSString *> *customAttributes;

/** Serial queue to manage mutation of attributes. */
@property(nonatomic, readwrite) dispatch_queue_t customAttributesSerialQueue;

/** Client object used for checking the status of the performance SDK before generating events. */
@property(nonatomic, readwrite) FPRClient *fprClient;

@property(nonatomic, nullable, strong) id<FIRCrashlyticsInterop> crashlytics;

@end