fix: fixed race condition in the Bluetooth module (#591)

.swiftlint.yml

@@ -29,6 +29,8 @@ identifier_name:
     - NetworkReaders
     - SensorsList
     - Alignments
+    - _devices
+    - _uuidAddress
 
 line_length: 200
 

Modules/Bluetooth/readers.swift

@@ -15,13 +15,35 @@ import CoreBluetooth
 import IOBluetooth
 
 internal class DevicesReader: Reader<[BLEDevice]>, CBCentralManagerDelegate, CBPeripheralDelegate {
-    private var devices: [BLEDevice] = []
-    
+    private let queue = DispatchQueue(label: "eu.exelban.Stats.Bluetooth.reader", attributes: .concurrent)
     private var manager: CBCentralManager!
-    private var uuidAddress: [UUID: String] = [:]
+    
+    private var _devices: [BLEDevice] = []
+    private var _uuidAddress: [UUID: String] = [:]
     private var peripherals: [CBPeripheral] = []
     private var characteristicsDict: [UUID: CBCharacteristic] = [:]
     
+    private var devices: [BLEDevice] {
+        get {
+            self.queue.sync { self._devices }
+        }
+        set {
+            self.queue.async(flags: .barrier) {
+                self._devices = newValue
+            }
+        }
+    }
+    private var uuidAddress: [UUID: String] {
+        get {
+            self.queue.sync { self._uuidAddress }
+        }
+        set {
+            self.queue.async(flags: .barrier) {
+                self._uuidAddress = newValue
+            }
+        }
+    }
+    
     private let batteryServiceUUID = CBUUID(string: "0x180F")
     private let batteryCharacteristicsUUID = CBUUID(string: "0x2A19")
     
@@ -89,7 +111,7 @@ internal class DevicesReader: Reader<[BLEDevice]>, CBCentralManagerDelegate, CBP
                 return
             }
             
-            if let uuid = UUID(uuidString: key) {
+            if let uuid = UUID(uuidString: key), self.uuidAddress[uuid] == nil {
                 self.uuidAddress[uuid] = value
             }
         }

Stats.xcodeproj/xcshareddata/xcschemes/Stats.xcscheme

@@ -89,6 +89,13 @@
             isEnabled = "NO">
          </EnvironmentVariable>
       </EnvironmentVariables>
+      <AdditionalOptions>
+         <AdditionalOption
+            key = "NSZombieEnabled"
+            value = "YES"
+            isEnabled = "YES">
+         </AdditionalOption>
+      </AdditionalOptions>
    </LaunchAction>
    <ProfileAction
       buildConfiguration = "Debug"

Stats/Supporting Files/Info.plist

@@ -17,7 +17,7 @@
 	<key>CFBundleShortVersionString</key>
 	<string>$(MARKETING_VERSION)</string>
 	<key>CFBundleVersion</key>
-	<string>298</string>
+	<string>299</string>
 	<key>Description</key>
 	<string>Simple macOS system monitor in your menu bar</string>
 	<key>LSApplicationCategoryType</key>