annotate Implab/Parallels/BlockingQueue.cs @ 196:40d7fed4a09e

fixed promise chaining behavior, the error handler doesn't handle result or cancellation handlers exceptions these exceptions are propagated to the next handlers.
author cin
date Mon, 29 Aug 2016 23:15:51 +0300
parents 041b77711262
children d6fe09f5592c
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1 using System;
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2 using System.Threading;
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3
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4 namespace Implab.Parallels {
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5 public class BlockingQueue<T> : AsyncQueue<T> {
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6 readonly object m_lock = new object();
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7
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8 public override void Enqueue(T value) {
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9 base.Enqueue(value);
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10 lock (m_lock)
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11 Monitor.Pulse(m_lock);
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12 }
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13
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14 public override void EnqueueRange(T[] data, int offset, int length) {
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15 base.EnqueueRange(data, offset, length);
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16 if (length > 1)
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17 lock (m_lock)
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18 Monitor.PulseAll(m_lock);
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19 else
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20 lock (m_lock)
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21 Monitor.Pulse(m_lock);
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22 }
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23
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24 public T GetItem(int timeout) {
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25 T item;
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26
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27 if (!TryDequeue(out item)) {
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28 var t1 = Environment.TickCount;
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29 var dt = timeout;
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30
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31 lock (m_lock) {
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32 while (!TryDequeue(out item)) {
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33 if (!Monitor.Wait(m_lock, dt))
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34 throw new TimeoutException();
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35 if (timeout >= 0) {
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36 dt = timeout - Environment.TickCount + t1;
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37 if (dt < 0)
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38 throw new TimeoutException();
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39 }
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40 }
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41 }
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42 }
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43 return item;
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44 }
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45
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46 public T GetItem() {
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47 T item;
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48 if (!TryDequeue(out item))
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49 lock (m_lock) {
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50 while (!TryDequeue(out item))
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51 Monitor.Wait(m_lock);
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52 }
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53 return item;
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54 }
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55
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56 public T[] GetRange(int max, int timeout) {
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57 Safe.ArgumentInRange(max, 1, Int32.MaxValue, "max");
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58
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59 var buffer = new T[max];
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60 int actual;
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61 if (!TryDequeueRange(buffer, 0, max, out actual)) {
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62 var t1 = Environment.TickCount;
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63 var dt = timeout;
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64
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65 lock (m_lock) {
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66 while (!TryDequeueRange(buffer, 0, max, out actual)) {
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67
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68 if (!Monitor.Wait(m_lock, dt))
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69 throw new TimeoutException();
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70
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71 if (timeout >= 0) {
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72 dt = timeout - Environment.TickCount + t1;
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73 if (dt < 0)
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74 throw new TimeoutException();
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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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80 var data = new T[actual];
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81 Array.Copy(buffer, data, actual);
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82 return data;
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83 }
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84
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85 public T[] GetRange(int max) {
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86 Safe.ArgumentInRange(max, 1, Int32.MaxValue, "max");
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87
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88 var buffer = new T[max];
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89 int actual;
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90 if (!TryDequeueRange(buffer, 0, max, out actual))
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91 lock (m_lock)
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92 while (!TryDequeueRange(buffer, 0, max, out actual))
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93 Monitor.Wait(m_lock);
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94
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95 var data = new T[actual];
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96 Array.Copy(buffer, data, actual);
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97 return data;
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98 }
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99 }
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100 }
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101