[SqlClient] Polyfill Stopwatch.GetElapsedTime

opentelemetry-dotnet-contrib.slnx

@@ -214,6 +214,7 @@
     <File Path="src/Shared/SqlParameterProcessor.cs" />
     <File Path="src/Shared/SqlProcessor.cs" />
     <File Path="src/Shared/SqlStatementInfo.cs" />
+    <File Path="src/Shared/StopwatchExtensions.cs" />
     <File Path="src/Shared/UriHelper.cs" />
   </Folder>
   <Folder Name="/src/Shared/AWS/">

src/OpenTelemetry.Instrumentation.SqlClient/Implementation/SqlTelemetryHelper.cs

@@ -93,17 +93,5 @@ public static TagList GetTagListFromConnectionInfo(string? dataSource, string? d
     }
 
     internal static double CalculateDurationFromTimestamp(long begin)
-    {
-#if NET
-        var duration = Stopwatch.GetElapsedTime(begin);
-#else
-        var end = Stopwatch.GetTimestamp();
-        var timestampToTicks = TimeSpan.TicksPerSecond / (double)Stopwatch.Frequency;
-        var delta = end - begin;
-        var ticks = (long)(timestampToTicks * delta);
-        var duration = new TimeSpan(ticks);
-#endif
-
-        return duration.TotalSeconds;
-    }
+        => Stopwatch.GetElapsedTime(begin).TotalSeconds;
 }

src/OpenTelemetry.Instrumentation.SqlClient/OpenTelemetry.Instrumentation.SqlClient.csproj

@@ -38,6 +38,7 @@
     <Compile Include="$(RepoRoot)\src\Shared\SqlParameterProcessor.cs" Link="Includes\SqlParameterProcessor.cs" />
     <Compile Include="$(RepoRoot)\src\Shared\SqlProcessor.cs" Link="Includes\SqlProcessor.cs" />
     <Compile Include="$(RepoRoot)\src\Shared\SqlStatementInfo.cs" Link="Includes\SqlStatementInfo.cs" />
+    <Compile Include="$(RepoRoot)\src\Shared\StopwatchExtensions.cs" Link="Includes\StopwatchExtensions.cs" />
   </ItemGroup>
 
   <ItemGroup>

src/Shared/StopwatchExtensions.cs

@@ -0,0 +1,25 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+#if !NET
+
+namespace System.Diagnostics;
+
+internal static class StopwatchExtensions
+{
+    extension(Stopwatch)
+    {
+        public static TimeSpan GetElapsedTime(long begin)
+        {
+            var end = Stopwatch.GetTimestamp();
+
+            var timestampToTicks = TimeSpan.TicksPerSecond / (double)Stopwatch.Frequency;
+            var delta = end - begin;
+            var ticks = (long)(timestampToTicks * delta);
+
+            return new TimeSpan(ticks);
+        }
+    }
+}
+
+#endif