From e0a2a3ae0eaaf66056c124d7f6e7db5ca10ff633 Mon Sep 17 00:00:00 2001
From: Sung Yoon Whang <suwhang@microsoft.com>
Date: Wed, 17 Apr 2019 23:16:47 -0700
Subject: [PATCH] Exposing the new counter APIs in System.Diagnostics.Tracing

Commit migrated from https://github.com/dotnet/corefx/commit/c042b3aa7de95332624f3d725e8abdb4d3d043f5
---
 .../ref/System.Diagnostics.Tracing.cs              | 30 ++++++++++++++++++++--
 1 file changed, 28 insertions(+), 2 deletions(-)

diff --git a/src/libraries/System.Diagnostics.Tracing/ref/System.Diagnostics.Tracing.cs b/src/libraries/System.Diagnostics.Tracing/ref/System.Diagnostics.Tracing.cs
index 173b09a..6263c2c 100644
--- a/src/libraries/System.Diagnostics.Tracing/ref/System.Diagnostics.Tracing.cs
+++ b/src/libraries/System.Diagnostics.Tracing/ref/System.Diagnostics.Tracing.cs
@@ -53,11 +53,37 @@ namespace System.Diagnostics.Tracing
         public bool DisableEvent(int eventId) { throw null; }
         public bool EnableEvent(int eventId) { throw null; }
     }
-    public partial class EventCounter : System.IDisposable
+    public abstract partial class DiagnosticCounter : System.IDisposable
     {
-        public EventCounter(string name, System.Diagnostics.Tracing.EventSource eventSource) { }
+        public DiagnosticCounter(string name, EventSource eventSource) { }
+        public void AddMetadata(string key, string value) { }
         public void Dispose() { }
+        public string DisplayName { get { throw null; } set { } }
+        public string Name { get { throw null; } }
+        public EventSource EventSource { get { throw null; } }
+    }
+
+    public partial class EventCounter : System.Diagnostics.Tracing.DiagnosticCounter
+    {
+        public EventCounter(string name, System.Diagnostics.Tracing.EventSource eventSource) : base(name, eventSource) { }
         public void WriteMetric(float value) { }
+        public void WriteMetric(double value) { }
+
+    }
+    public partial class PollingCounter : System.Diagnostics.Tracing.DiagnosticCounter
+    {
+        public PollingCounter(string name, System.Diagnostics.Tracing.EventSource eventSource, Func<double> metricProvider) : base(name, eventSource) { }
+    }
+    public partial class IncrementingEventCounter : System.Diagnostics.Tracing.DiagnosticCounter
+    {
+        public IncrementingEventCounter(string name, System.Diagnostics.Tracing.EventSource eventSource) : base(name, eventSource) { }
+        public void Increment(double increment = 1) { }
+        public TimeSpan DisplayRateTimeScale { get { throw null; } set { } }
+    }
+    public partial class IncrementingPollingCounter : System.Diagnostics.Tracing.DiagnosticCounter
+    {
+        public IncrementingPollingCounter(string name, EventSource eventSource, Func<double> totalValueProvider) : base(name, eventSource) { }
+        public TimeSpan DisplayRateTimeScale { get { throw null; } set { } }
     }
     [System.AttributeUsageAttribute(System.AttributeTargets.Class | System.AttributeTargets.Struct, Inherited=false)]
     public partial class EventDataAttribute : System.Attribute
-- 
2.7.4