1 files changed, 42 insertions, 0 deletions
diff --git a/src/mscorlib/shared/System/Diagnostics/Tracing/IEventProvider.cs b/src/mscorlib/shared/System/Diagnostics/Tracing/IEventProvider.cs
new file mode 100644
index 0000000000..71a2fe4d44
--- /dev/null
+++ b/src/mscorlib/shared/System/Diagnostics/Tracing/IEventProvider.cs
@@ -0,0 +1,42 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using Microsoft.Win32;
+
+#if ES_BUILD_STANDALONE
+namespace Microsoft.Diagnostics.Tracing
+#else
+namespace System.Diagnostics.Tracing
+#endif
+{
+    // Represents the interface between EventProvider and an external logging mechanism.
+    internal interface IEventProvider
+    {
+        // Register an event provider.
+        unsafe uint EventRegister(
+            ref Guid providerId,
+            UnsafeNativeMethods.ManifestEtw.EtwEnableCallback enableCallback,
+            void* callbackContext,
+            ref long registrationHandle);
+
+        // Unregister an event provider.
+        uint EventUnregister(long registrationHandle);
+
+        // Write an event.
+        unsafe int EventWriteTransferWrapper(
+            long registrationHandle,
+            ref EventDescriptor eventDescriptor,
+            IntPtr eventHandle,
+            Guid* activityId,
+            Guid* relatedActivityId,
+            int userDataCount,
+            EventProvider.EventData* userData);
+
+        // Get or set the per-thread activity ID.
+        int EventActivityIdControl(UnsafeNativeMethods.ManifestEtw.ActivityControl ControlCode, ref Guid ActivityId);
+
+        // Define an EventPipeEvent handle.
+        unsafe IntPtr DefineEventHandle(uint eventID, string eventName, Int64 keywords, uint eventVersion, uint level, byte *pMetadata, uint metadataLength);
+    }
+}