port from perforce

2026-04-18 22:31:51 +02:00
commit 8d0ab5b7cc
8409 changed files with 3972376 additions and 0 deletions
--- a/aiwaz/Aiwaz.Common/HiPerfTimer.cs
+++ b/aiwaz/Aiwaz.Common/HiPerfTimer.cs
@@ -0,0 +1,44 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Runtime.InteropServices;
+
+namespace Aiwaz.Common
+{
+    public static class HiPerfTimer
+    {
+        [DllImport("Kernel32.dll")]
+        private static extern bool QueryPerformanceCounter(out long performanceCount);
+        [DllImport("Kernel32.dll")]
+        private static extern bool QueryPerformanceFrequency(out long frequency);
+        private static double? startTime;
+        private static double lastTime;
+
+        public static double LastDeltaTime
+        {
+            get;
+            private set;
+        }
+
+        public static double ElapsedTime
+        {
+            get
+            {
+                long frequency, performanceCount;
+                QueryPerformanceFrequency(out frequency);
+                QueryPerformanceCounter(out performanceCount);
+                double thisTime = performanceCount / (double)frequency;
+                if (!startTime.HasValue)
+                {
+                    startTime = thisTime;
+                    lastTime = thisTime;
+                    return 0.0;
+                }
+                LastDeltaTime = thisTime - lastTime;
+                lastTime = thisTime;
+                return thisTime - startTime.Value;
+            }
+        }
+    }
+}