2 // DispatchQueue+Alamofire.swift
4 // Copyright (c) 2014-2017 Alamofire Software Foundation (http://alamofire.org/)
6 // Permission is hereby granted, free of charge, to any person obtaining a copy
7 // of this software and associated documentation files (the "Software"), to deal
8 // in the Software without restriction, including without limitation the rights
9 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 // copies of the Software, and to permit persons to whom the Software is
11 // furnished to do so, subject to the following conditions:
13 // The above copyright notice and this permission notice shall be included in
14 // all copies or substantial portions of the Software.
16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
28 extension DispatchQueue {
29 static var userInteractive: DispatchQueue { return DispatchQueue.global(qos: .userInteractive) }
30 static var userInitiated: DispatchQueue { return DispatchQueue.global(qos: .userInitiated) }
31 static var utility: DispatchQueue { return DispatchQueue.global(qos: .utility) }
32 static var background: DispatchQueue { return DispatchQueue.global(qos: .background) }
34 func after(_ delay: TimeInterval, execute closure: @escaping () -> Void) {
35 asyncAfter(deadline: .now() + delay, execute: closure)