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implab » ImplabNet
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fixed object pool
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r83:397fe8db0806 v2
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@@ -1,85 +1,92
1 1 using System;
2 2 using Implab.Parallels;
3 3 using System.Threading;
4 4
5 5 namespace Implab {
6 6 public class ObjectPool<T> : IDisposable {
7 7 readonly Func<T> m_factory;
8 8 readonly Action<T> m_cleanup;
9 9 readonly int m_size;
10 10 readonly MTQueue<T> m_queue = new MTQueue<T>();
11 11
12 volatile bool m_disposed;
12 bool m_disposed;
13 13
14 volatile int m_count;
14 int m_count;
15 15
16 16 public ObjectPool(Func<T> factory, Action<T> cleanup, int size) {
17 17 Safe.ArgumentNotNull(factory, "factory");
18 18 Safe.ArgumentInRange(size, 1, size, "size");
19 19
20 20 m_factory = factory;
21 21 m_cleanup = cleanup;
22 22 m_size = size;
23 23 }
24 24
25 25 public ObjectPool(Func<T> factory, Action<T> cleanup) : this(factory,cleanup,Environment.ProcessorCount+1) {
26 26 }
27 27
28 28 public ObjectPool(Func<T> factory) : this(factory,null,Environment.ProcessorCount+1) {
29 29 }
30 30
31 public ObjectPoolWrapper<T> Allocate() {
31 public ObjectPoolWrapper<T> AllocateAuto() {
32
33 return new ObjectPoolWrapper<T>(Allocate(), this);
34 }
35
36 public T Allocate() {
32 37 if (m_disposed)
33 38 throw new ObjectDisposedException(this.ToString());
34 39
35 40 T instance;
36 41 if (m_queue.TryDequeue(out instance)) {
37 42 Interlocked.Decrement(ref m_count);
38 return instance;
39 43 } else {
40 44 instance = m_factory();
41 45 }
42 return new ObjectPoolWrapper<T>(instance, this);
46 return instance;
43 47 }
44 48
45 49 public void Release(T instance) {
50 Thread.MemoryBarrier();
46 51 if (m_count < m_size && !m_disposed) {
47 52 Interlocked.Increment(ref m_count);
48 53
49 54 if (m_cleanup != null)
50 55 m_cleanup(instance);
51 56
52 57 m_queue.Enqueue(instance);
53 58
54 59 // пока элемент возвращался в кеш, была начата операция освобождения всего кеша
55 60 // и возможно уже законцена, в таком случае следует извлечь элемент обратно и
56 61 // освободить его. Если операция освобождения кеша еще не заврешилась, то будет
57 62 // изъят и освобожден произвольный элемен, что не повлияет на ход всего процесса.
58 if (m_disposed && m_queue.TryDequeue(out instance))
59 Safe.Dispose(instance);
63 if (m_disposed && m_queue.TryDequeue(out instance) && instance is IDisposable)
64 ((IDisposable)instance).Dispose() ;
60 65
61 66 } else {
62 Safe.Dispose(instance);
67 if (instance is IDisposable)
68 ((IDisposable)instance).Dispose();
63 69 }
64 70 }
65 71
66 72 protected virtual void Dispose(bool disposing) {
67 73 if (disposing) {
68 74 m_disposed = true;
69 75 T instance;
70 76 while (m_queue.TryDequeue(out instance))
71 Safe.Dispose(instance);
77 if (instance is IDisposable)
78 ((IDisposable)instance).Dispose();
72 79 }
73 80 }
74 81
75 82 #region IDisposable implementation
76 83
77 84 public void Dispose() {
78 85 Dispose(true);
79 86 GC.SuppressFinalize(this);
80 87 }
81 88
82 89 #endregion
83 90 }
84 91 }
85 92
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