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namespace Implab.Diagnostics {
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struct OperationContext {
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readonly LogicalOperation m_initial;
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public readonly static OperationContext EMPTY = new OperationContext(LogicalOperation.EMPTY, false);
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LogicalOperation m_current;
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readonly bool m_ownership;
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public OperationContext(LogicalOperation operation, bool ownership) {
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Safe.ArgumentNotNull(operation, "operation");
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m_initial = operation;
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m_current = operation;
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m_ownership = ownership;
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}
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public LogicalOperation CurrentOperation {
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get { return m_current; }
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}
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public void BeginLogicalOperation(string name) {
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m_current = new LogicalOperation(name, m_current);
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}
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public LogicalOperation DetachLogicalOperation() {
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var detached = m_current;
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if (m_current != LogicalOperation.EMPTY) {
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if (m_current != m_initial)
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m_current = m_current.Parent;
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else if (m_ownership)
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m_current = LogicalOperation.EMPTY;
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else
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detached = LogicalOperation.EMPTY;
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}
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TraceLog.TraceWarning("EndLogicalOperation can't be applied in the current context");
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return detached;
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}
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public void EndLogicalOperation() {
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if (m_current != m_initial) {
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m_current = m_current.Parent;
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} else if (m_current != null && m_ownership) {
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m_current = null;
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} else {
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TraceLog.TraceWarning("EndLogicalOperation can't be applied in the current context");
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}
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}
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}
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}
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