| 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162 | /* * * Copyright 2016 gRPC authors. * * 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>#import <SystemConfiguration/SystemConfiguration.h>@interface GRPCReachabilityFlags : NSObject+ (nonnull instancetype)flagsWithFlags:(SCNetworkReachabilityFlags)flags;/** * One accessor method to query each of the different flags. Example:@property(nonatomic, readonly) BOOL isCell; */#define GRPC_XMACRO_ITEM(methodName, FlagName) \@property(nonatomic, readonly) BOOL methodName;#include "GRPCReachabilityFlagNames.xmacro.h"#undef GRPC_XMACRO_ITEM@property(nonatomic, readonly) BOOL isHostReachable;@end@interface GRPCConnectivityMonitor : NSObject+ (nullable instancetype)monitorWithHost:(nonnull NSString *)hostName;- (nonnull instancetype)init NS_UNAVAILABLE;/** * Queue on which callbacks will be dispatched. Default is the main queue. Set it before calling * handleLossWithHandler:. */// TODO(jcanizales): Default to a serial background queue instead.@property(nonatomic, strong, null_resettable) dispatch_queue_t queue;/** * Calls handler every time the connectivity to this instance's host is lost. If this instance is * released before that happens, the handler won't be called. * Only one handler is active at a time, so if this method is called again before the previous * handler has been called, it might never be called at all (or yes, if it has already been queued). */- (void)handleLossWithHandler:(nullable void (^)(void))lossHandler      wifiStatusChangeHandler:(nullable void (^)(void))wifiStatusChangeHandler;@end
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