85 lines
2.6 KiB
Swift
85 lines
2.6 KiB
Swift
//
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// SocketAckManager.swift
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// Socket.IO-Client-Swift
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//
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// Created by Erik Little on 4/3/15.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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import Dispatch
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import Foundation
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public enum SocketAckStatus : String {
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case noAck = "NO ACK"
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}
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private struct SocketAck : Hashable {
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let ack: Int
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var callback: AckCallback!
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var hashValue: Int {
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return ack.hashValue
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}
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init(ack: Int) {
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self.ack = ack
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}
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init(ack: Int, callback: @escaping AckCallback) {
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self.ack = ack
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self.callback = callback
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}
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}
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private func <(lhs: SocketAck, rhs: SocketAck) -> Bool {
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return lhs.ack < rhs.ack
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}
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private func ==(lhs: SocketAck, rhs: SocketAck) -> Bool {
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return lhs.ack == rhs.ack
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}
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struct SocketAckManager {
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private var acks = Set<SocketAck>(minimumCapacity: 1)
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private let ackSemaphore = DispatchSemaphore(value: 1)
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mutating func addAck(_ ack: Int, callback: @escaping AckCallback) {
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acks.insert(SocketAck(ack: ack, callback: callback))
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}
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/// Should be called on handle queue
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mutating func executeAck(_ ack: Int, with items: [Any], onQueue: DispatchQueue) {
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ackSemaphore.wait()
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defer { ackSemaphore.signal() }
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let ack = acks.remove(SocketAck(ack: ack))
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onQueue.async() { ack?.callback(items) }
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}
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/// Should be called on handle queue
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mutating func timeoutAck(_ ack: Int, onQueue: DispatchQueue) {
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ackSemaphore.wait()
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defer { ackSemaphore.signal() }
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let ack = acks.remove(SocketAck(ack: ack))
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onQueue.async() {
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ack?.callback?([SocketAckStatus.noAck.rawValue])
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}
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}
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}
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