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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 "RTCDispatcher+Private.h"
12
13static dispatch_queue_t kAudioSessionQueue = nil;
14static dispatch_queue_t kCaptureSessionQueue = nil;
15
16@implementation RTC_OBJC_TYPE (RTCDispatcher)
17
18+ (void)initialize {
19  static dispatch_once_t onceToken;
20  dispatch_once(&onceToken, ^{
21    kAudioSessionQueue = dispatch_queue_create(
22        "org.webrtc.RTCDispatcherAudioSession",
23        DISPATCH_QUEUE_SERIAL);
24    kCaptureSessionQueue = dispatch_queue_create(
25        "org.webrtc.RTCDispatcherCaptureSession",
26        DISPATCH_QUEUE_SERIAL);
27  });
28}
29
30+ (void)dispatchAsyncOnType:(RTCDispatcherQueueType)dispatchType
31                      block:(dispatch_block_t)block {
32  dispatch_queue_t queue = [self dispatchQueueForType:dispatchType];
33  dispatch_async(queue, block);
34}
35
36+ (BOOL)isOnQueueForType:(RTCDispatcherQueueType)dispatchType {
37  dispatch_queue_t targetQueue = [self dispatchQueueForType:dispatchType];
38  const char* targetLabel = dispatch_queue_get_label(targetQueue);
39  const char* currentLabel = dispatch_queue_get_label(DISPATCH_CURRENT_QUEUE_LABEL);
40
41  NSAssert(strlen(targetLabel) > 0, @"Label is required for the target queue.");
42  NSAssert(strlen(currentLabel) > 0, @"Label is required for the current queue.");
43
44  return strcmp(targetLabel, currentLabel) == 0;
45}
46
47#pragma mark - Private
48
49+ (dispatch_queue_t)dispatchQueueForType:(RTCDispatcherQueueType)dispatchType {
50  switch (dispatchType) {
51    case RTCDispatcherTypeMain:
52      return dispatch_get_main_queue();
53    case RTCDispatcherTypeCaptureSession:
54      return kCaptureSessionQueue;
55    case RTCDispatcherTypeAudioSession:
56      return kAudioSessionQueue;
57  }
58}
59
60@end
61