src/mscorlib/shared/System/Diagnostics/Tracing/IEventProvider.cs

   1 // Licensed to the .NET Foundation under one or more agreements.
   2 // The .NET Foundation licenses this file to you under the MIT license.
   3 // See the LICENSE file in the project root for more information.
   4
   5 using Microsoft.Win32;
   6
   7 #if ES_BUILD_STANDALONE
   8 namespace Microsoft.Diagnostics.Tracing
   9 #else
  10 namespace System.Diagnostics.Tracing
  11 #endif
  12 {
  13     // Represents the interface between EventProvider and an external logging mechanism.
  14     internal interface IEventProvider
  15     {
  16         // Register an event provider.
  17         unsafe uint EventRegister(
  18             ref Guid providerId,
  19             UnsafeNativeMethods.ManifestEtw.EtwEnableCallback enableCallback,
  20             void* callbackContext,
  21             ref long registrationHandle);
  22
  23         // Unregister an event provider.
  24         uint EventUnregister(long registrationHandle);
  25
  26         // Write an event.
  27         unsafe int EventWriteTransferWrapper(
  28             long registrationHandle,
  29             ref EventDescriptor eventDescriptor,
  30             Guid* activityId,
  31             Guid* relatedActivityId,
  32             int userDataCount,
  33             EventProvider.EventData* userData);
  34
  35         // Get or set the per-thread activity ID.
  36         int EventActivityIdControl(UnsafeNativeMethods.ManifestEtw.ActivityControl ControlCode, ref Guid ActivityId);
  37     }
  38 }