Mercurial > hg > ucis.core
annotate Util/AsyncResultBase.cs @ 104:327be9216006
Improved PML code
| author | Ivo Smits <Ivo@UCIS.nl> |
|---|---|
| date | Sat, 11 Oct 2014 14:05:41 +0200 |
| parents | a6faa87767bb |
| children |
| rev | line source |
|---|---|
| 5 | 1 ???using System; |
| 2 using System.Threading; | |
| 3 using SysThreadPool = System.Threading.ThreadPool; | |
| 4 | |
| 5 namespace UCIS.Util { | |
| 6 public abstract class AsyncResultBase : IAsyncResult { | |
|
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a6faa87767bb
AsyncResultBase: prevent recursive synchronous completion callback
Ivo Smits <Ivo@UCIS.nl>
parents:
7
diff
changeset
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7 [ThreadStatic] |
|
a6faa87767bb
AsyncResultBase: prevent recursive synchronous completion callback
Ivo Smits <Ivo@UCIS.nl>
parents:
7
diff
changeset
|
8 static Boolean ThreadInCallback = false; |
| 5 | 9 ManualResetEvent WaitEvent = null; |
| 10 AsyncCallback Callback = null; | |
| 104 | 11 Object MonitorWaitHandle = new Object(); |
| 5 | 12 public object AsyncState { get; private set; } |
| 13 public bool CompletedSynchronously { get; private set; } | |
| 14 public bool IsCompleted { get; private set; } | |
| 15 public Exception Error { get; private set; } | |
| 16 public WaitHandle AsyncWaitHandle { | |
| 17 get { | |
| 18 lock (this) { | |
| 19 if (WaitEvent == null) WaitEvent = new ManualResetEvent(IsCompleted); | |
| 20 return WaitEvent; | |
| 21 } | |
| 22 } | |
| 23 } | |
| 24 | |
| 25 public AsyncResultBase(AsyncCallback callback, Object state) { | |
| 26 this.Callback = callback; | |
| 27 this.AsyncState = state; | |
| 28 } | |
| 29 | |
| 30 private void CallCallback(Object state) { | |
| 31 if (Callback != null) Callback(this); | |
| 32 } | |
| 33 | |
| 34 protected void SetCompleted(Boolean synchronously, Exception error) { | |
| 35 this.CompletedSynchronously = synchronously; | |
| 36 this.Error = error; | |
| 37 lock (this) { | |
| 38 IsCompleted = true; | |
| 39 if (WaitEvent != null) WaitEvent.Set(); | |
| 104 | 40 if (MonitorWaitHandle != null) lock (MonitorWaitHandle) Monitor.Pulse(MonitorWaitHandle); |
| 5 | 41 } |
|
7
4b78cc5f116b
Fixes and improvements (some untested)
Ivo Smits <Ivo@UCIS.nl>
parents:
5
diff
changeset
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42 if (Callback != null) { |
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18
a6faa87767bb
AsyncResultBase: prevent recursive synchronous completion callback
Ivo Smits <Ivo@UCIS.nl>
parents:
7
diff
changeset
|
43 if (synchronously && !ThreadInCallback) { |
|
a6faa87767bb
AsyncResultBase: prevent recursive synchronous completion callback
Ivo Smits <Ivo@UCIS.nl>
parents:
7
diff
changeset
|
44 try { |
|
a6faa87767bb
AsyncResultBase: prevent recursive synchronous completion callback
Ivo Smits <Ivo@UCIS.nl>
parents:
7
diff
changeset
|
45 ThreadInCallback = true; |
|
a6faa87767bb
AsyncResultBase: prevent recursive synchronous completion callback
Ivo Smits <Ivo@UCIS.nl>
parents:
7
diff
changeset
|
46 Callback(this); |
|
a6faa87767bb
AsyncResultBase: prevent recursive synchronous completion callback
Ivo Smits <Ivo@UCIS.nl>
parents:
7
diff
changeset
|
47 } finally { |
|
a6faa87767bb
AsyncResultBase: prevent recursive synchronous completion callback
Ivo Smits <Ivo@UCIS.nl>
parents:
7
diff
changeset
|
48 ThreadInCallback = false; |
|
a6faa87767bb
AsyncResultBase: prevent recursive synchronous completion callback
Ivo Smits <Ivo@UCIS.nl>
parents:
7
diff
changeset
|
49 } |
|
7
4b78cc5f116b
Fixes and improvements (some untested)
Ivo Smits <Ivo@UCIS.nl>
parents:
5
diff
changeset
|
50 } else { |
|
4b78cc5f116b
Fixes and improvements (some untested)
Ivo Smits <Ivo@UCIS.nl>
parents:
5
diff
changeset
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51 SysThreadPool.QueueUserWorkItem(CallCallback); |
|
4b78cc5f116b
Fixes and improvements (some untested)
Ivo Smits <Ivo@UCIS.nl>
parents:
5
diff
changeset
|
52 } |
|
4b78cc5f116b
Fixes and improvements (some untested)
Ivo Smits <Ivo@UCIS.nl>
parents:
5
diff
changeset
|
53 } |
| 5 | 54 } |
| 55 | |
| 104 | 56 public void WaitForCompletion() { |
| 57 lock (this) if (!IsCompleted) lock (MonitorWaitHandle) Monitor.Wait(MonitorWaitHandle); | |
| 58 } | |
| 59 | |
| 5 | 60 protected void ThrowError() { |
| 61 if (Error != null) throw Error; | |
| 62 } | |
| 63 } | |
| 64 } |