Fix bug where sometimes "ALL ON" or "ALL OFF" don't work

2016-01-18 19:18:06 -08:00
parent 858ea41746
commit bb59974376
3 changed files with 155 additions and 43 deletions
@@ -0,0 +1,38 @@
+//
+//  Semaphore.swift
+//  XIONControlPanel
+//
+//  Created by Charles Magahern on 1/18/16.
+//  Copyright © 2016 XION. All rights reserved.
+//
+
+import Foundation
+
+class Semaphore {
+    private var _semaphore: dispatch_semaphore_t
+    
+    init(value: Int)
+    {
+        _semaphore = dispatch_semaphore_create(value)
+    }
+    
+    func wait()
+    {
+        self.wait(nil)
+    }
+    
+    func wait(untilDate: NSDate?)
+    {
+        var time: dispatch_time_t = DISPATCH_TIME_FOREVER
+        if (untilDate != nil) {
+            time = UInt64(untilDate!.timeIntervalSinceNow) * NSEC_PER_SEC
+        }
+        
+        dispatch_semaphore_wait(_semaphore, time)
+    }
+    
+    func signal()
+    {
+        dispatch_semaphore_signal(_semaphore)
+    }
+}