public void it_should_set_properties()
{
var TEST_TRACE_NAME = "krabs C++/CLI properties test";
uint EVENT_TRACE_CONTROL_QUERY = 0;
uint ERROR_SUCCESS = 0;
var trace = new UserTrace(TEST_TRACE_NAME);
var properties = new EventTraceProperties
{
BufferSize = 1024,
MinimumBuffers = (uint)Environment.ProcessorCount * 2 + 1,
MaximumBuffers = (uint)Environment.ProcessorCount * 2 + 2,
FlushTimer = 2,
LogFileMode = (uint)LogFileModeFlags.FLAG_EVENT_TRACE_REAL_TIME_MODE
};
trace.SetTraceProperties(properties);
trace.Open();
var info = new TraceInfo
{
Wnode_BufferSize = 200,
LoggerNameOffset = 120
};
var status = ControlTraceW(0, TEST_TRACE_NAME, ref info, EVENT_TRACE_CONTROL_QUERY);
Assert.IsTrue(status == ERROR_SUCCESS);
Assert.IsTrue(properties.BufferSize == info.BufferSize);
Assert.IsTrue(properties.MinimumBuffers == info.MinimumBuffers);
Assert.IsTrue(properties.MaximumBuffers == info.MaximumBuffers);
Assert.IsTrue(properties.FlushTimer == info.FlushTimer);
Assert.IsTrue((uint)LogFileModeFlags.FLAG_EVENT_TRACE_REAL_TIME_MODE == (info.LogFileMode & (uint)LogFileModeFlags.FLAG_EVENT_TRACE_REAL_TIME_MODE));
Assert.IsTrue((uint)LogFileModeFlags.FLAG_EVENT_TRACE_NO_PER_PROCESSOR_BUFFERING != (info.LogFileMode & (uint)LogFileModeFlags.FLAG_EVENT_TRACE_NO_PER_PROCESSOR_BUFFERING));
}
protected override bool ReleaseHandle()
{
var properties = new EventTraceProperties(true /*initialize*/);
return(NativeMethods.StopTrace(this.sessionHandle, this.loggerName, out properties /*as statistics*/)
!= 0);
}
public static uint FlushTraceLogger(string sessionName, string sessionGuid, out string logfileName)
{
EventTraceProperties properties = new EventTraceProperties();
properties.Wnode.BufferSize = (uint)Marshal.SizeOf(properties);
properties.Wnode.Guid = new Guid(sessionGuid);
properties.LoggerNameOffset = (uint)Marshal.OffsetOf(typeof(EventTraceProperties), "LoggerName");
properties.LogFileNameOffset = (uint)Marshal.OffsetOf(typeof(EventTraceProperties), "LogFileName");
uint result = ControlTrace(0, sessionName, ref properties, EVENT_TRACE_CONTROL_FLUSH);
logfileName = properties.LogFileName;
return result;
}
private bool LoadExistingEventTraceProperties()
{
const int ERROR_WMI_INSTANCE_NOT_FOUND = 4201;
this.eventTraceProperties = new EventTraceProperties(true);
int status = NativeMethods.QueryTrace(0, this.loggerName, ref this.eventTraceProperties);
if (status == 0)
{
return(true);
}
else if (status == ERROR_WMI_INSTANCE_NOT_FOUND)
{
// The instance name passed was not recognized as valid by a WMI data provider.
return(false);
}
throw new System.ComponentModel.Win32Exception(status);
}
/// <summary>
/// The load existing event trace properties.
/// </summary>
/// <returns>
/// The <see cref="bool"/>.
/// </returns>
/// <exception cref="Win32Exception">
/// </exception>
private bool LoadExistingEventTraceProperties()
{
const int ErrorWmiInstanceNotFound = 4201;
this.eventTraceProperties = new EventTraceProperties(true);
var status = NativeMethods.QueryTrace(0, this.loggerName, ref this.eventTraceProperties);
if (status == 0)
{
return(true);
}
if (status == ErrorWmiInstanceNotFound)
{
// The instance name passed was not recognized as valid by a WMI data provider.
return(false);
}
throw new Win32Exception(status);
}
private static extern uint ControlTrace(
[In] ulong sessionHandle,
[In] string sessionName,
[In, Out] ref EventTraceProperties properties,
[In] uint controlCode);
public static extern uint FlushTrace(
[In] Int64 sessionHandle,
[In] string sessionName,
[In, Out] ref EventTraceProperties properties);
public static extern uint StopTrace(
[In] Int64 sessionHandle,
[In] string sessionName,
[Out] out EventTraceProperties properties);
public static extern uint StartTrace(
[Out] out Int64 sessionHandle,
[In] string sessionName,
[In, Out] ref EventTraceProperties properties);
public static extern uint StopTrace([In] ulong traceHandle, [In] string sessionName,
[In, Out] ref EventTraceProperties properties);
public static extern uint StartTrace([Out] out ulong traceHandle, [In] string sessionName,
[In] ref EventTraceProperties properties);
public static extern uint QueryTrace([In] ulong traceHandle, [In] string sessionName,
ref EventTraceProperties properties);
