1 files changed, 85 insertions, 0 deletions
diff --git a/src/vm/eventpipefile.h b/src/vm/eventpipefile.h
new file mode 100644
index 0000000000..2f6853545d
--- /dev/null
+++ b/src/vm/eventpipefile.h
@@ -0,0 +1,85 @@
+// 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.
+
+
+#ifndef __EVENTPIPE_FILE_H__
+#define __EVENTPIPE_FILE_H__
+
+#ifdef FEATURE_PERFTRACING
+
+#include "eventpipe.h"
+#include "eventpipeeventinstance.h"
+#include "fastserializableobject.h"
+#include "fastserializer.h"
+
+class EventPipeFile : public FastSerializableObject
+{
+    public:
+
+        EventPipeFile(SString &outputFilePath
+#ifdef _DEBUG
+            ,
+            bool lockOnWrite = false
+#endif // _DEBUG
+        );
+        ~EventPipeFile();
+
+        // Write an event to the file.
+        void WriteEvent(EventPipeEventInstance &instance);
+
+        // Serialize this object.
+        // Not supported - this is the entry object for the trace,
+        // which means that the contents hasn't yet been created.
+        void FastSerialize(FastSerializer *pSerializer)
+        {
+            LIMITED_METHOD_CONTRACT;
+            _ASSERTE(!"This function should never be called!");
+        }
+
+        // Get the type name of this object.
+        const char* GetTypeName()
+        {
+            LIMITED_METHOD_CONTRACT;
+            return "Microsoft.DotNet.Runtime.EventPipeFile";
+        }
+
+    private:
+
+        // Get the metadata address in the file for an event.
+        // The return value can be written into the file as a back-pointer to the event metadata.
+        StreamLabel GetMetadataLabel(EventPipeEvent &event);
+
+        // Save the metadata address in the file for an event.
+        void SaveMetadataLabel(EventPipeEvent &event, StreamLabel label);
+
+        // The object responsible for serialization.
+        FastSerializer *m_pSerializer;
+
+        // The system time when the file was opened.
+        SYSTEMTIME m_fileOpenSystemTime;
+
+        // The timestamp when the file was opened.  Used for calculating file-relative timestamps.
+        LARGE_INTEGER m_fileOpenTimeStamp;
+
+        // The frequency of the timestamps used for this file.
+        LARGE_INTEGER m_timeStampFrequency;
+
+        // The forward reference index that marks the beginning of the event stream.
+        unsigned int m_beginEventsForwardReferenceIndex;
+
+        // The serialization which is responsible for making sure only a single event
+        // or block of events gets written to the file at once.
+        SpinLock m_serializationLock;
+
+        // Hashtable of metadata labels.
+        MapSHashWithRemove<EventPipeEvent*, StreamLabel> *m_pMetadataLabels;
+
+#ifdef _DEBUG
+        bool m_lockOnWrite;
+#endif // _DEBUG
+};
+
+#endif // FEATURE_PERFTRACING
+
+#endif // __EVENTPIPE_FILE_H__