1 /* 2 * Copyright 2015 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #import <Foundation/Foundation.h> 12 13 #import "RTCMacros.h" 14 15 typedef NS_ENUM(NSInteger, RTCDispatcherQueueType) { 16 // Main dispatcher queue. 17 RTCDispatcherTypeMain, 18 // Used for starting/stopping AVCaptureSession, and assigning 19 // capture session to AVCaptureVideoPreviewLayer. 20 RTCDispatcherTypeCaptureSession, 21 // Used for operations on AVAudioSession. 22 RTCDispatcherTypeAudioSession, 23 // Used for operations on NWPathMonitor. 24 RTCDispatcherTypeNetworkMonitor, 25 }; 26 27 /** Dispatcher that asynchronously dispatches blocks to a specific 28 * shared dispatch queue. 29 */ 30 RTC_OBJC_EXPORT 31 @interface RTC_OBJC_TYPE (RTCDispatcher) : NSObject 32 33 - (instancetype)init NS_UNAVAILABLE; 34 35 /** Dispatch the block asynchronously on the queue for dispatchType. 36 * @param dispatchType The queue type to dispatch on. 37 * @param block The block to dispatch asynchronously. 38 */ 39 + (void)dispatchAsyncOnType:(RTCDispatcherQueueType)dispatchType block:(dispatch_block_t)block; 40 41 /** Returns YES if run on queue for the dispatchType otherwise NO. 42 * Useful for asserting that a method is run on a correct queue. 43 */ 44 + (BOOL)isOnQueueForType:(RTCDispatcherQueueType)dispatchType; 45 46 @end 47