annotate Implab/Parallels/ArrayTraits.cs @ 16:5a4b735ba669 promises

sync
author cin
date Thu, 07 Nov 2013 20:20:26 +0400
parents 0f982f9b7d4d
children e3935fdf59a2
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
15
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
1 using System;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
2 using System.Collections.Generic;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
3 using System.Diagnostics;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
4 using System.Linq;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
5 using System.Text;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
6 using System.Threading;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
7
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
8 namespace Implab.Parallels {
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
9 public static class ArrayTraits {
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
10 class ArrayIterator<TSrc> : DispatchPool<int> {
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
11 readonly Action<TSrc> m_action;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
12 readonly TSrc[] m_source;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
13 readonly Promise<int> m_promise = new Promise<int>();
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
14
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
15 int m_pending;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
16 int m_next;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
17
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
18 public ArrayIterator(TSrc[] source, Action<TSrc> action, int threads)
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
19 : base(threads) {
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
20
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
21 Debug.Assert(source != null);
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
22 Debug.Assert(action != null);
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
23
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
24 m_next = 0;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
25 m_source = source;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
26 m_pending = source.Length;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
27 m_action = action;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
28
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
29 m_promise.Anyway(() => Dispose());
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
30 m_promise.Cancelled(() => Dispose());
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
31
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
32 InitPool();
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
33 }
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
34
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
35 public Promise<int> Promise {
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
36 get {
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
37 return m_promise;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
38 }
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
39 }
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
40
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
41 protected override bool TryDequeue(out int unit) {
16
cin
parents: 15
diff changeset
42 unit = Interlocked.Increment(ref m_next) - 1;
cin
parents: 15
diff changeset
43 return unit >= m_source.Length ? false : true;
15
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
44 }
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
45
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
46 protected override void InvokeUnit(int unit) {
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
47 try {
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
48 m_action(m_source[unit]);
16
cin
parents: 15
diff changeset
49 var pending = Interlocked.Decrement(ref m_pending);
15
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
50 if (pending == 0)
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
51 m_promise.Resolve(m_source.Length);
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
52 } catch (Exception e) {
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
53 m_promise.Reject(e);
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
54 }
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
55 }
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
56 }
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
57
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
58 class ArrayMapper<TSrc, TDst>: DispatchPool<int> {
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
59 readonly Func<TSrc, TDst> m_transform;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
60 readonly TSrc[] m_source;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
61 readonly TDst[] m_dest;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
62 readonly Promise<TDst[]> m_promise = new Promise<TDst[]>();
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
63
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
64 int m_pending;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
65 int m_next;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
66
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
67 public ArrayMapper(TSrc[] source, Func<TSrc, TDst> transform, int threads)
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
68 : base(threads) {
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
69
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
70 Debug.Assert (source != null);
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
71 Debug.Assert( transform != null);
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
72
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
73 m_next = 0;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
74 m_source = source;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
75 m_dest = new TDst[source.Length];
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
76 m_pending = source.Length;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
77 m_transform = transform;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
78
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
79 m_promise.Anyway(() => Dispose());
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
80 m_promise.Cancelled(() => Dispose());
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
81
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
82 InitPool();
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
83 }
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
84
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
85 public Promise<TDst[]> Promise {
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
86 get {
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
87 return m_promise;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
88 }
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
89 }
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
90
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
91 protected override bool TryDequeue(out int unit) {
16
cin
parents: 15
diff changeset
92 unit = Interlocked.Increment(ref m_next) - 1;
cin
parents: 15
diff changeset
93 return unit >= m_source.Length ? false : true;
15
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
94 }
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
95
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
96 protected override void InvokeUnit(int unit) {
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
97 try {
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
98 m_dest[unit] = m_transform(m_source[unit]);
16
cin
parents: 15
diff changeset
99 var pending = Interlocked.Decrement(ref m_pending);
15
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
100 if (pending == 0)
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
101 m_promise.Resolve(m_dest);
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
102 } catch (Exception e) {
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
103 m_promise.Reject(e);
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
104 }
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
105 }
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
106 }
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
107
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
108 public static Promise<TDst[]> ParallelMap<TSrc, TDst> (this TSrc[] source, Func<TSrc,TDst> transform, int threads) {
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
109 if (source == null)
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
110 throw new ArgumentNullException("source");
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
111 if (transform == null)
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
112 throw new ArgumentNullException("transform");
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
113
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
114 var mapper = new ArrayMapper<TSrc, TDst>(source, transform, threads);
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
115 return mapper.Promise;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
116 }
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
117
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
118 public static Promise<int> ParallelForEach<TSrc>(this TSrc[] source, Action<TSrc> action, int threads) {
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
119 if (source == null)
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
120 throw new ArgumentNullException("source");
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
121 if (action == null)
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
122 throw new ArgumentNullException("action");
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
123
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
124 var iter = new ArrayIterator<TSrc>(source, action, threads);
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
125 return iter.Promise;
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
126 }
16
cin
parents: 15
diff changeset
127
cin
parents: 15
diff changeset
128 public static Promise<TDst[]> ChainedMap<TSrc, TDst>(this TSrc[] source, ChainedOperation<TSrc, TDst> transform, int threads) {
cin
parents: 15
diff changeset
129 if (source == null)
cin
parents: 15
diff changeset
130 throw new ArgumentNullException("source");
cin
parents: 15
diff changeset
131 if (transform == null)
cin
parents: 15
diff changeset
132 throw new ArgumentNullException("transform");
cin
parents: 15
diff changeset
133 if (threads <= 0)
cin
parents: 15
diff changeset
134 throw new ArgumentOutOfRangeException("Threads number must be greater then zero");
cin
parents: 15
diff changeset
135
cin
parents: 15
diff changeset
136 var promise = new Promise<TDst[]>();
cin
parents: 15
diff changeset
137 var res = new TDst[source.Length];
cin
parents: 15
diff changeset
138 var pending = source.Length;
cin
parents: 15
diff changeset
139 var semaphore = new Semaphore(threads, threads);
cin
parents: 15
diff changeset
140
cin
parents: 15
diff changeset
141 AsyncPool.InvokeNewThread(() => {
cin
parents: 15
diff changeset
142 for (int i = 0; i < source.Length; i++) {
cin
parents: 15
diff changeset
143 if(promise.State != PromiseState.Unresolved)
cin
parents: 15
diff changeset
144 break; // stop processing in case of error or cancellation
cin
parents: 15
diff changeset
145 var idx = i;
cin
parents: 15
diff changeset
146 semaphore.WaitOne();
cin
parents: 15
diff changeset
147 try {
cin
parents: 15
diff changeset
148 var p1 = transform(source[i]);
cin
parents: 15
diff changeset
149 p1.Anyway(() => semaphore.Release());
cin
parents: 15
diff changeset
150 p1.Cancelled(() => semaphore.Release());
cin
parents: 15
diff changeset
151 p1.Then(
cin
parents: 15
diff changeset
152 x => {
cin
parents: 15
diff changeset
153 res[idx] = x;
cin
parents: 15
diff changeset
154 var left = Interlocked.Decrement(ref pending);
cin
parents: 15
diff changeset
155 if (left == 0)
cin
parents: 15
diff changeset
156 promise.Resolve(res);
cin
parents: 15
diff changeset
157 },
cin
parents: 15
diff changeset
158 e => promise.Reject(e)
cin
parents: 15
diff changeset
159 );
cin
parents: 15
diff changeset
160
cin
parents: 15
diff changeset
161 } catch (Exception e) {
cin
parents: 15
diff changeset
162 promise.Reject(e);
cin
parents: 15
diff changeset
163 }
cin
parents: 15
diff changeset
164 }
cin
parents: 15
diff changeset
165 return 0;
cin
parents: 15
diff changeset
166 });
cin
parents: 15
diff changeset
167
cin
parents: 15
diff changeset
168 return promise.Anyway(() => semaphore.Dispose());
cin
parents: 15
diff changeset
169 }
15
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
170 }
0f982f9b7d4d implemented parallel map and foreach for arrays
cin
parents:
diff changeset
171 }