protected override Task LiveLogListen(CancellationToken stopEvt, LiveLogXMLWriter output)
{
using (this.trace.NewFrame)
{
try
{
bufferReadyEvt.Set();
long msgIdx = 1;
WaitHandle[] evts = new WaitHandle[] { dataReadyEvt, stopEvt.WaitHandle };
while (true)
{
int evtIdx = WaitHandle.WaitAny(evts);
if (evtIdx == 1)
{
break;
}
IntPtr addr = bufferAddress.DangerousGetHandle();
UInt32 appID = (UInt32)Marshal.ReadInt32(addr);
long strAddr = addr.ToInt64() + sizeof(UInt32);
string msg = string.Format("{0} [{1}] {2}",
msgIdx, appID, Marshal.PtrToStringAnsi(new IntPtr(strAddr)));
XmlWriter writer = output.BeginWriteMessage(false);
writer.WriteStartElement("m");
writer.WriteAttributeString("d", Listener.FormatDate(DateTime.Now));
writer.WriteAttributeString("t", "Process " + appID.ToString());
writer.WriteString(msg);
writer.WriteEndElement();
output.EndWriteMessage();
++msgIdx;
bufferReadyEvt.Set();
}
}
catch (Exception e)
{
this.trace.Error(e, "DebugOutput listening thread failed");
}
}
return(Task.CompletedTask);
}
public LogProvider(ILogProviderHost host, Factory factory)
:
base(host, factory, ConnectionParamsUtils.CreateConnectionParamsWithIdentity(DebugOutput.Factory.connectionIdentity))
{
using (trace.NewFrame)
{
try
{
dataReadyEvt = new EventWaitHandle(false, EventResetMode.AutoReset, "DBWIN_DATA_READY");
bufferReadyEvt = new EventWaitHandle(false, EventResetMode.AutoReset, "DBWIN_BUFFER_READY");
trace.Info("Events opened OK. DBWIN_DATA_READY={0}, DBWIN_BUFFER_READY={1}",
dataReadyEvt.SafeWaitHandle.DangerousGetHandle(), bufferReadyEvt.SafeWaitHandle.DangerousGetHandle());
bufferFile = new SafeFileHandle(
Unmanaged.CreateFileMapping(new IntPtr(-1), IntPtr.Zero, Unmanaged.PAGE_READWRITE, 0, 1024, "DBWIN_BUFFER"), true);
if (bufferFile.IsInvalid)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
trace.Info("DBWIN_BUFFER shared file opened OK. Handle={0}", bufferFile.DangerousGetHandle());
bufferAddress = new SafeViewOfFileHandle(
Unmanaged.MapViewOfFile(bufferFile, Unmanaged.FILE_MAP_READ, 0, 0, 512), true);
if (bufferAddress.IsInvalid)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
trace.Info("View of file mapped OK. Ptr={0}", bufferAddress.DangerousGetHandle());
StartLiveLogThread("DebugOutput listening thread");
}
catch (Exception e)
{
trace.Error(e, "Failed to inistalize DebugOutput reader. Disposing what has been created so far.");
Cleanup();
throw;
}
}
}
