mcs/class/System.Data.Linq/src/DbLinq/Util/Profiler.cs

   1 using System;\r
   2 using System.Collections.Generic;\r
   3 using System.Linq;\r
   4 using System.Text;\r
   5 using System.Diagnostics;\r
   6 using System.IO;\r
   7 \r
   8 namespace DbLinq.Util\r
   9 {\r
  10 #if !MONO_STRICT\r
  11     public\r
  12 #endif\r
  13     static class Profiler\r
  14     {\r
  15         [ThreadStatic]\r
  16         private static Stopwatch timer = new Stopwatch();\r
  17 \r
  18         private static Stopwatch Timer\r
  19         {\r
  20             get \r
  21             {\r
  22                 if (timer == null)\r
  23                     timer = new Stopwatch();\r
  24                 return timer;\r
  25             }\r
  26         }\r
  27 \r
  28         [ThreadStatic]\r
  29         private static long prevTicks;\r
  30         [ThreadStatic]\r
  31         private static bool profiling;\r
  32         [ThreadStatic]\r
  33         private static TextWriter log;\r
  34 \r
  35         private static TextWriter Log\r
  36         {\r
  37             get\r
  38             {\r
  39                 if (log == null)\r
  40                     log = Console.Out;\r
  41                 return log;\r
  42             }\r
  43             set \r
  44             { \r
  45                 log = value; \r
  46             }\r
  47         }\r
  48 \r
  49         [Conditional("DEBUG")]\r
  50         public static void Start()\r
  51         {\r
  52             profiling = true;\r
  53             prevTicks = 0;\r
  54             Timer.Reset();\r
  55             Timer.Start();\r
  56         }\r
  57 \r
  58         [Conditional("DEBUG")]\r
  59         public static void At(string format, params object[] args)\r
  60         {\r
  61             if (profiling)\r
  62             {\r
  63                 Timer.Stop();\r
  64                 Log.Write("#AT(time={0:D12}, elapsed={1:D12}) ", Timer.ElapsedTicks, Timer.ElapsedTicks - prevTicks);\r
  65                 prevTicks = Timer.ElapsedTicks;\r
  66                 Log.WriteLine(format, args);\r
  67                 Timer.Start();\r
  68             }\r
  69         }\r
  70 \r
  71         [Conditional("DEBUG")]\r
  72         public static void Stop()\r
  73         {\r
  74             profiling = false;\r
  75             Timer.Stop();\r
  76         }\r
  77     }\r
  78 }