public override bool QueryActiveEntry(UIntPtr sourceHandle,
int index,
ref QueryBuffer entryBuffer)
{
unsafe {
UInt32 offset;
UIntPtr type;
fixed(byte *ptr = &(entryBuffer.GetBuffer()[0]))
{
bool success = DiagnosisService.ReadActiveSourceItem(sourceHandle,
index,
&type,
ptr,
entryBuffer.GetBufferSize());
entryBuffer.Type = type;
// the active entries do not have any header
entryBuffer.UserOffset = 0;
return(success);
}
}
}
public object GetObject(QueryBuffer buffer)
{
unsafe {
switch (Type)
{
case DataType.__int8:
case DataType.__uint8:
fixed(byte *ptrInt = &(buffer.GetBuffer()[buffer.UserOffset + Offset]))
{
return(*(byte *)ptrInt);
}
case DataType.__int16:
case DataType.__uint16:
fixed(byte *ptrInt = &(buffer.GetBuffer()[buffer.UserOffset + Offset]))
{
return(*(ushort *)ptrInt);
}
case DataType.__int32:
case DataType.__uint32:
fixed(byte *ptrInt = &(buffer.GetBuffer()[buffer.UserOffset + Offset]))
{
return(*(Int32 *)ptrInt);
}
case DataType.__UIntPtr:
fixed(byte *ptrInt = &(buffer.GetBuffer()[buffer.UserOffset + Offset]))
{
return(*(UIntPtr *)ptrInt);
}
case DataType.__IntPtr:
fixed(byte *ptrInt = &(buffer.GetBuffer()[buffer.UserOffset + Offset]))
{
return(*(IntPtr *)ptrInt);
}
default:
DebugStub.WriteLine("Unknown field type");
break;
}
}
return(null);
}
public bool Initialize(EventingStorage storage,
bool forward)
{
if (EntryBuffer == null)
{
EntryBuffer = new QueryBuffer(256);
if ((EntryBuffer == null) || (EntryBuffer.GetBuffer() == null))
{
return(false);
}
}
// Cleanup for the previous states.
if (QueryHandle != 0)
{
QueryStorage.DeleteQueryView(QueryHandle);
QueryHandle = 0;
QueryStorage = null;
}
// Initialize the new query states
QueryStorage = storage;
if (QueryStorage == null)
{
return(false);
}
QueryHandle = QueryStorage.CreateQueryView(forward);
if (QueryHandle == 0)
{
QueryStorage = null;
return(false);
}
return(true);
}
public override UIntPtr GetNextEntry(UIntPtr queryHandle,
ref QueryBuffer entryBuffer)
{
unsafe {
UInt32 offset;
UIntPtr type;
fixed(byte *ptr = &(entryBuffer.GetBuffer()[0]))
{
entryBuffer.EntryHandle = DiagnosisService.GetNextEntry(queryHandle,
&type,
&offset,
ptr,
entryBuffer.GetBufferSize());
entryBuffer.Type = type;
entryBuffer.UserOffset = offset;
return(entryBuffer.EntryHandle);
}
}
}