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1 using System;
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2 using System.Collections.Generic;
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3 using System.Threading;
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4
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5 namespace Implab.Diagnostics {
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6 /// <summary>
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7 /// Trace context is bound to the specific thread, each thread has it's own ThreadContext.
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8 /// </summary>
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9 /// <remarks>
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10 /// ThreadContext manages relations between logical operations and threads.
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11 /// </remarks>
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12 public class TraceContext {
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13
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14 [ThreadStatic]
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15 static TraceContext _instance;
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16
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17 OperationContext m_current = OperationContext.EMPTY;
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18 readonly Stack<OperationContext> m_stack = new Stack<OperationContext>();
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19 readonly int m_threadId;
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20
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21 public static TraceContext Instance {
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22 get {
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23 if (_instance == null)
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24 _instance = new TraceContext();
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25 return _instance;
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26 }
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27 }
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28
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29 public TraceContext() {
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30 m_threadId = Thread.CurrentThread.ManagedThreadId;
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31 }
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32
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33 public int ThreadId {
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34 get { return m_threadId; }
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35 }
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36
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37 public LogicalOperation CurrentOperation {
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38 get {
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39 return m_current.CurrentOperation;
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40 }
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41 }
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42
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43 public void EnterLogicalOperation(LogicalOperation operation, bool takeOwnership) {
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44 // TODO Emit event
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45 m_stack.Push(m_current);
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46 m_current = new OperationContext(operation, takeOwnership);
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47 }
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48
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49 public void StartLogicalOperation(string name) {
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50 m_current.BeginLogicalOperation(name);
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51 }
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52
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53 public void StartLogicalOperation() {
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54 // TODO Emit Event
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55 m_current.BeginLogicalOperation(String.Empty);
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56 }
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57
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58 public void EndLogicalOperation() {
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59 // TODO Emit event
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60 m_current.EndLogicalOperation();
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61 }
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62
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63 public LogicalOperation DetachLogicalOperation() {
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64 // TODO Emit event
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65 return m_current.DetachLogicalOperation();
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66 }
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67
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68 public void Leave() {
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69 // TODO Emit event
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70 if (m_stack.Count > 0)
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71 m_current = m_stack.Pop();
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72 else {
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73 TraceLog.TraceWarning("Attemtp to leave the last operation context");
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74 m_current = OperationContext.EMPTY;
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75 }
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76 }
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77 }
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78 }
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79
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