public unsafe bool ReadActiveSourceItem(UIntPtr sourceHandle,
int item,
UIntPtr *type,
byte *buffer,
UInt16 bufferSize)
{
Lock.AcquireMutex();
object source = SourcesHandleTable[sourceHandle];
if (source != null)
{
ActiveSource activeSource = source as ActiveSource;
if (activeSource != null)
{
bool success = activeSource.GetActiveEntry(item, type, buffer, bufferSize);
Lock.ReleaseMutex();
return(success);
}
}
Lock.ReleaseMutex();
return(false);
}
public override bool GetSourceInformation(UIntPtr sourceHandle,
ref UIntPtr storageHandle,
ref UIntPtr eventType,
ref UInt16 count,
ref string bufferName)
{
Lock.AcquireMutex();
EventSource source = SourcesHandleTable[sourceHandle] as EventSource;
if (source != null)
{
bufferName = source.SourceName;
ActiveSource activeSource = source as ActiveSource;
if (activeSource != null)
{
storageHandle = 0;
eventType = activeSource.EventTypeHandle;
count = activeSource.Count;
}
else
{
storageHandle = source.Storage.GetHandle();
eventType = 0;
count = 0;
}
Lock.ReleaseMutex();
return(true);
}
Lock.ReleaseMutex();
return(false);
}
// Eventing source support routines
public override bool RegisterSource(EventSource source)
{
// Sanity check against double registration
if (source.SourceHandle != 0)
{
return(false);
}
UIntPtr sourceHandle = 0;
Lock.AcquireMutex();
object obj = SourcesLookupTable[source.SourceName];
if (obj != null)
{
sourceHandle = (UIntPtr)obj;
}
if (sourceHandle != 0)
{
object existingSource = SourcesHandleTable[sourceHandle];
if (existingSource != null)
{
// Type already registered. Return the existing value
Lock.ReleaseMutex();
return(false);
}
}
else
{
// The handle for this source has not been allocated
// Register a new one
sourceHandle = AllocateSourceHandleImpl(source.SourceName);
while (sourceHandle == 0)
{
if (!TypesRepository.AddBuffer(BUFFER_EXPANSION_SIZE))
{
Lock.ReleaseMutex();
return(false);
}
sourceHandle = AllocateSourceHandleImpl(source.SourceName);
}
SourcesLookupTable[source.SourceName] = sourceHandle;
}
// We must have here a valid source handle
source.SourceHandle = sourceHandle;
SourcesHandleTable[sourceHandle] = source;
ActiveSource activeSource = source as ActiveSource;
if (activeSource == null)
{
// regular sources with associated memory storage
RegisterSourceStorageImpl(sourceHandle,
source.Storage.GetHandle(),
source.ControlFlags);
}
else
{
RegisterActiveSourceImpl(sourceHandle,
activeSource.EventTypeHandle,
activeSource.DebugBufferAddress,
activeSource.Count,
activeSource.EntrySize);
// Active sources, the object does the event buffer management
}
Lock.ReleaseMutex();
return(true);
}
