/// <summary>
/// Initialize a new AggregateStackSource.
/// </summary>
/// <param name="sources">An IEnumerable of KeyValuePairs mapping source names to StackSources.</param>
public AggregateStackSource(IEnumerable <KeyValuePair <string, StackSource> > sources)
{
m_sourceCount = sources.Count() + 1; // +1 for the pseudo-source.
m_sourceNames = new string[m_sourceCount];
m_sources = new StackSource[m_sourceCount];
// We initialize this when we see the first sample
m_firstSampleTime = new double[m_sourceCount];
for (int j = 0; j < m_firstSampleTime.Length; j++)
{
m_firstSampleTime[j] = double.NegativeInfinity;
}
// True if all sub-sources support retrieving samples by index.
bool supportsSamples = true;
// The time limit for this source.
m_RelativeMSecLimit = 0.0f;
int i = 1;
// Unpack sources.
foreach (var pair in sources)
{
var name = pair.Key;
var source = pair.Value;
m_sourceNames[i] = name;
m_sources[i] = source;
i++;
m_RelativeMSecLimit = Math.Max(m_RelativeMSecLimit, source.SampleTimeRelativeMSecLimit);
if (source.SampleIndexLimit == 0)
{
supportsSamples = false;
}
}
// Set up pseudo-source.
m_sources[0] = m_pseudo = new PseudoStackSource(m_sourceNames);
// Set up our returned sample.
m_sampleStorage = new StackSourceSample(this);
// Set up index maps.
m_stackMap = new IndexMap(m_sources.Select(s => s.CallStackIndexLimit));
m_frameMap = new IndexMap(m_sources.Select(s => s.CallFrameIndexLimit));
if (supportsSamples)
{
// The sampleMap has size (m_sourceCount - 1) because m_pseudo doesn't have samples.
m_sampleMap = new IndexMap(m_sources.Skip(1).Select(s => s.SampleIndexLimit));
}
else
{
m_sampleMap = null;
}
}