/// <summary>
/// Do intialization common to the contructors.
/// </summary>
private void Init(string sessionName)
{
this.sessionHandle = TraceEventNativeMethods.INVALID_HANDLE_VALUE;
if (sessionName.Length > MaxNameSize - 1)
{
throw new ArgumentException("File name too long", "sessionName");
}
this.sessionName = sessionName;
properties = new TraceEventNativeMethods.EVENT_TRACE_PROPERTIES();
properties.Wnode.Flags = TraceEventNativeMethods.WNODE_FLAG_TRACED_GUID;
properties.LoggerNameOffset = (uint)Marshal.SizeOf(typeof(TraceEventNativeMethods.EVENT_TRACE_PROPERTIES));
properties.LogFileNameOffset = properties.LoggerNameOffset + MaxNameSize * sizeof(char);
extentionSpaceOffset = properties.LogFileNameOffset + MaxNameSize * sizeof(char);
// #sizeCalculation
properties.Wnode.BufferSize = extentionSpaceOffset + 8 + 8 * 4 + 4 + maxStackTraceProviders * 4;
unmanagedPropertiesBuffer = TraceEventNativeMethods.AllocHGlobal((int)properties.Wnode.BufferSize);
TraceEventNativeMethods.ZeroMemory(unmanagedPropertiesBuffer, properties.Wnode.BufferSize);
}
private IntPtr ToUnmanagedBuffer(TraceEventNativeMethods.EVENT_TRACE_PROPERTIES properties, string fileName)
{
if (fileName == null)
{
properties.LogFileNameOffset = 0;
}
else
{
properties.LogFileNameOffset = properties.LoggerNameOffset + MaxNameSize * 2;
}
Marshal.StructureToPtr(properties, unmanagedPropertiesBuffer, false);
byte[] buffer = Encoding.Unicode.GetBytes(sessionName);
Marshal.Copy(buffer, 0, (IntPtr)(unmanagedPropertiesBuffer.ToInt64() + properties.LoggerNameOffset), buffer.Length);
Marshal.WriteInt16(unmanagedPropertiesBuffer, (int)properties.LoggerNameOffset + buffer.Length, 0);
if (fileName != null)
{
buffer = Encoding.Unicode.GetBytes(fileName);
Marshal.Copy(buffer, 0, (IntPtr)(unmanagedPropertiesBuffer.ToInt64() + properties.LogFileNameOffset), buffer.Length);
Marshal.WriteInt16(unmanagedPropertiesBuffer, (int)properties.LogFileNameOffset + buffer.Length, 0);
}
return(unmanagedPropertiesBuffer);
}