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1 1 using System;
2 2 using System.Collections.Generic;
3 3 using System.Linq;
4 4 using System.Text;
5 5
6 6 namespace Implab
7 7 {
8 8 public interface IPromise<T>: IPromiseBase
9 9 {
10
10
11 T Join();
12
13 T Join(int timeout);
11 14
15 IPromise<T> Then(ResultHandler<T> success, ErrorHandler error);
16 IPromise<T> Then(ResultHandler<T> success, ErrorHandler<T> error);
17 IPromise<T> Then(ResultHandler<T> success);
18 IPromise<T> Error(ErrorHandler error);
19 IPromise<T> Error(ErrorHandler<T> error);
12 20
21 IPromise<T2> Map<T2>(ResultMapper<T,T2> mapper, ErrorHandler error);
22 IPromise<T2> Map<T2>(ResultMapper<T, T2> mapper);
13 23
24 IPromise<T2> Chain<T2>(ChainedOperation<T, T2> chained, ErrorHandler error);
25 IPromise<T2> Chain<T2>(ChainedOperation<T, T2> chained);
26
27 IPromise<T> Cancelled(Action handler);
28 IPromise<T> Finally(Action handler);
29 IPromise<T> Anyway(Action handler);
14 30
15 31 }
16 32 }
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@@ -1,19 +1,23
1 1 using System;
2 2 using System.Collections.Generic;
3 3 using System.Linq;
4 4 using System.Text;
5 5
6 6 namespace Implab {
7 7 public interface IPromiseBase: ICancellable {
8 8 /// <summary>
9 9 /// Check whereather the promise has no more than one dependent promise.
10 10 /// </summary>
11 11 bool IsExclusive {
12 12 get;
13 13 }
14 14
15 15 bool IsResolved { get; }
16 16
17 17 bool IsCancelled { get; }
18
19 IPromiseBase Then(Action success,ErrorHandler error);
20 IPromiseBase Then(Action success);
21
18 22 }
19 23 }
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@@ -1,172 +1,172
1 1 using System;
2 2 using System.Collections.Generic;
3 3 using System.Diagnostics;
4 4 using System.Linq;
5 5 using System.Text;
6 6 using System.Threading;
7 7
8 8 namespace Implab.Parallels {
9 9 public static class ArrayTraits {
10 10 class ArrayIterator<TSrc> : DispatchPool<int> {
11 11 readonly Action<TSrc> m_action;
12 12 readonly TSrc[] m_source;
13 13 readonly Promise<int> m_promise = new Promise<int>();
14 14
15 15 int m_pending;
16 16 int m_next;
17 17
18 18 public ArrayIterator(TSrc[] source, Action<TSrc> action, int threads)
19 19 : base(threads) {
20 20
21 21 Debug.Assert(source != null);
22 22 Debug.Assert(action != null);
23 23
24 24 m_next = 0;
25 25 m_source = source;
26 26 m_pending = source.Length;
27 27 m_action = action;
28 28
29 29 m_promise.Anyway(() => Dispose());
30 30 m_promise.Cancelled(() => Dispose());
31 31
32 32 InitPool();
33 33 }
34 34
35 35 public Promise<int> Promise {
36 36 get {
37 37 return m_promise;
38 38 }
39 39 }
40 40
41 41 protected override bool TryDequeue(out int unit) {
42 42 unit = Interlocked.Increment(ref m_next) - 1;
43 43 return unit >= m_source.Length ? false : true;
44 44 }
45 45
46 46 protected override void InvokeUnit(int unit) {
47 47 try {
48 48 m_action(m_source[unit]);
49 49 var pending = Interlocked.Decrement(ref m_pending);
50 50 if (pending == 0)
51 51 m_promise.Resolve(m_source.Length);
52 52 } catch (Exception e) {
53 53 m_promise.Reject(e);
54 54 }
55 55 }
56 56 }
57 57
58 58 class ArrayMapper<TSrc, TDst>: DispatchPool<int> {
59 59 readonly Func<TSrc, TDst> m_transform;
60 60 readonly TSrc[] m_source;
61 61 readonly TDst[] m_dest;
62 62 readonly Promise<TDst[]> m_promise = new Promise<TDst[]>();
63 63
64 64 int m_pending;
65 65 int m_next;
66 66
67 67 public ArrayMapper(TSrc[] source, Func<TSrc, TDst> transform, int threads)
68 68 : base(threads) {
69 69
70 70 Debug.Assert (source != null);
71 71 Debug.Assert( transform != null);
72 72
73 73 m_next = 0;
74 74 m_source = source;
75 75 m_dest = new TDst[source.Length];
76 76 m_pending = source.Length;
77 77 m_transform = transform;
78 78
79 79 m_promise.Anyway(() => Dispose());
80 80 m_promise.Cancelled(() => Dispose());
81 81
82 82 InitPool();
83 83 }
84 84
85 85 public Promise<TDst[]> Promise {
86 86 get {
87 87 return m_promise;
88 88 }
89 89 }
90 90
91 91 protected override bool TryDequeue(out int unit) {
92 92 unit = Interlocked.Increment(ref m_next) - 1;
93 93 return unit >= m_source.Length ? false : true;
94 94 }
95 95
96 96 protected override void InvokeUnit(int unit) {
97 97 try {
98 98 m_dest[unit] = m_transform(m_source[unit]);
99 99 var pending = Interlocked.Decrement(ref m_pending);
100 100 if (pending == 0)
101 101 m_promise.Resolve(m_dest);
102 102 } catch (Exception e) {
103 103 m_promise.Reject(e);
104 104 }
105 105 }
106 106 }
107 107
108 108 public static Promise<TDst[]> ParallelMap<TSrc, TDst> (this TSrc[] source, Func<TSrc,TDst> transform, int threads) {
109 109 if (source == null)
110 110 throw new ArgumentNullException("source");
111 111 if (transform == null)
112 112 throw new ArgumentNullException("transform");
113 113
114 114 var mapper = new ArrayMapper<TSrc, TDst>(source, transform, threads);
115 115 return mapper.Promise;
116 116 }
117 117
118 118 public static Promise<int> ParallelForEach<TSrc>(this TSrc[] source, Action<TSrc> action, int threads) {
119 119 if (source == null)
120 120 throw new ArgumentNullException("source");
121 121 if (action == null)
122 122 throw new ArgumentNullException("action");
123 123
124 124 var iter = new ArrayIterator<TSrc>(source, action, threads);
125 125 return iter.Promise;
126 126 }
127 127
128 public static Promise<TDst[]> ChainedMap<TSrc, TDst>(this TSrc[] source, ChainedOperation<TSrc, TDst> transform, int threads) {
128 public static IPromise<TDst[]> ChainedMap<TSrc, TDst>(this TSrc[] source, ChainedOperation<TSrc, TDst> transform, int threads) {
129 129 if (source == null)
130 130 throw new ArgumentNullException("source");
131 131 if (transform == null)
132 132 throw new ArgumentNullException("transform");
133 133 if (threads <= 0)
134 134 throw new ArgumentOutOfRangeException("Threads number must be greater then zero");
135 135
136 136 var promise = new Promise<TDst[]>();
137 137 var res = new TDst[source.Length];
138 138 var pending = source.Length;
139 139 var semaphore = new Semaphore(threads, threads);
140 140
141 141 AsyncPool.InvokeNewThread(() => {
142 142 for (int i = 0; i < source.Length; i++) {
143 143 if(promise.IsResolved)
144 144 break; // stop processing in case of error or cancellation
145 145 var idx = i;
146 146 semaphore.WaitOne();
147 147 try {
148 148 var p1 = transform(source[i]);
149 149 p1.Anyway(() => semaphore.Release());
150 150 p1.Cancelled(() => semaphore.Release());
151 151 p1.Then(
152 152 x => {
153 153 res[idx] = x;
154 154 var left = Interlocked.Decrement(ref pending);
155 155 if (left == 0)
156 156 promise.Resolve(res);
157 157 },
158 158 e => promise.Reject(e)
159 159 );
160 160
161 161 } catch (Exception e) {
162 162 promise.Reject(e);
163 163 }
164 164 }
165 165 return 0;
166 166 });
167 167
168 168 return promise.Anyway(() => semaphore.Dispose());
169 169 }
170 170
171 171 }
172 172 }
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@@ -1,646 +1,656
1 1 using System;
2 2 using System.Collections.Generic;
3 3 using System.Reflection;
4 4 using System.Diagnostics;
5 5 using System.Threading;
6 6 using Implab.Parallels;
7 7
8 8 namespace Implab {
9 9
10 10 public delegate void ErrorHandler(Exception e);
11 11 public delegate T ErrorHandler<out T>(Exception e);
12 12 public delegate void ResultHandler<in T>(T result);
13 13 public delegate TNew ResultMapper<in TSrc, out TNew>(TSrc result);
14 14 public delegate Promise<TNew> ChainedOperation<in TSrc, TNew>(TSrc result);
15 15
16 16 /// <summary>
17 17 /// Класс для асинхронного получСния Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ΠΎΠ². Π’Π°ΠΊ Π½Π°Π·Ρ‹Π²Π°Π΅ΠΌΠΎΠ΅ "ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅".
18 18 /// </summary>
19 19 /// <typeparam name="T">Π’ΠΈΠΏ ΠΏΠΎΠ»ΡƒΡ‡Π°Π΅ΠΌΠΎΠ³ΠΎ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Π°</typeparam>
20 20 /// <remarks>
21 21 /// <para>БСрвис ΠΏΡ€ΠΈ ΠΎΠ±Ρ€Π°Ρ‰Π΅Π½ΠΈΠΈ ΠΊ Π΅Π³ΠΎ ΠΌΠ΅Ρ‚ΠΎΠ΄Ρƒ Π΄Π°Π΅Ρ‚ ΠΎΠ±Π΅Ρ‰Π°ΠΈΠ½ΠΈΠ΅ ΠΎ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΈΠΈ ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΈ,
22 22 /// ΠΊΠ»ΠΈΠ΅Π½Ρ‚ ΠΏΠΎΠ»ΡƒΡ‡ΠΈΠ² Ρ‚Π°ΠΊΠΎΠ΅ ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅ ΠΌΠΎΠΆΠ΅Ρ‚ ΡƒΡΡ‚Π°Π½ΠΎΠ²ΠΈΡ‚ΡŒ ряд ΠΎΠ±Ρ€Π°Ρ‚Π½Ρ‹Ρ… Π²Ρ‹Π·ΠΎΠ²ΠΎ для получСния
23 23 /// событий выполнСния обСщания, Ρ‚ΠΎΠ΅ΡΡ‚ΡŒ Π·Π°Π²Π΅Ρ€ΡˆΠ΅Π½ΠΈΡ ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΈ ΠΈ прСдоставлСнии Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ΠΎΠ².</para>
24 24 /// <para>
25 25 /// ΠžΠ±Π΅Ρ‰Π΅Π½ΠΈΠ΅ ΠΌΠΎΠΆΠ΅Ρ‚ Π±Ρ‹Ρ‚ΡŒ ΠΊΠ°ΠΊ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΎ, Ρ‚Π°ΠΊ ΠΈ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΎ с ошибкой. Для подписки Π½Π°
26 26 /// Π΄Π°Π½Π½Ρ‹Π΅ события ΠΊΠ»ΠΈΠ΅Π½Ρ‚ Π΄ΠΎΠ»ΠΆΠ΅Π½ ΠΈΡΠΏΠΎΠ»ΡŒΠ·ΠΎΠ²Π°Ρ‚ΡŒ ΠΌΠ΅Ρ‚ΠΎΠ΄Ρ‹ <c>Then</c>.
27 27 /// </para>
28 28 /// <para>
29 29 /// БСрвис, Π² свою ΠΎΡ‡Π΅Ρ€Π΅Π΄ΡŒ, ΠΏΠΎ ΠΎΠΊΠΎΠ½Ρ‡Π°Π½ΠΈΡŽ выполнСния ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΈ (Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎ с ошибкой),
30 30 /// ΠΈΡΠΏΠΎΠ»ΡŒΠ·ΡƒΠ΅Ρ‚ ΠΌΠ΅Ρ‚ΠΎΠ΄Ρ‹ <c>Resolve</c> Π»ΠΈΠ±ΠΎ <c>Reject</c> для оповСщСния ΠΊΠ»ΠΈΠ΅Ρ‚Π½Π° ΠΎ
31 31 /// Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΈΠΈ обСщания.
32 32 /// </para>
33 33 /// <para>
34 34 /// Если сСрвСр успСл Π²Ρ‹ΠΏΠΎΠ»Π½ΠΈΡ‚ΡŒ ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅ Π΅Ρ‰Π΅ Π΄ΠΎ Ρ‚ΠΎΠ³ΠΎ, ΠΊΠ°ΠΊ ΠΊΠ»ΠΈΠ΅Π½Ρ‚ Π½Π° Π½Π΅Π³ΠΎ подписался,
35 35 /// Ρ‚ΠΎ Π² ΠΌΠΎΠΌΠ΅Π½Ρ‚ подписки ΠΊΠ»ΠΈΠ΅Π½Ρ‚Π° Π±ΡƒΠ΄ΡƒΡ‚ Π²Ρ‹Π·Π²Π°Π½Ρ‹ ΡΠΎΠΎΡ‚Π²Π΅Ρ‚ΡΠ²ΡƒΡŽΡ‰ΠΈΠ΅ события Π² синхронном
36 36 /// Ρ€Π΅ΠΆΠΈΠΌΠ΅ ΠΈ ΠΊΠ»ΠΈΠ΅Π½Ρ‚ Π±ΡƒΠ΄Π΅Ρ‚ ΠΎΠΏΠΎΠ²Π΅Ρ‰Π΅Π½ Π² любом случаС. Π˜Π½Π°Ρ‡Π΅, ΠΎΠ±Ρ€Π°Π±ΠΎΡ‚Ρ‡ΠΈΠΊΠΈ Π΄ΠΎΠ±Π°Π²Π»ΡΡŽΡ‚ΡΡ Π²
37 37 /// список Π² порядкС подписания ΠΈ Π² этом ΠΆΠ΅ порядкС ΠΎΠ½ΠΈ Π±ΡƒΠ΄ΡƒΡ‚ Π²Ρ‹Π·Π²Π°Π½Ρ‹ ΠΏΡ€ΠΈ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΈΠΈ
38 38 /// обСщания.
39 39 /// </para>
40 40 /// <para>
41 41 /// ΠžΠ±Ρ€Π°Π±Π°Ρ‚Ρ‹Π²Π°Ρ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ обСщания ΠΌΠΎΠΆΠ½ΠΎ ΠΏΡ€Π΅ΠΎΠ±Ρ€Π°Π·ΠΎΠ²Ρ‹Π²Π°Ρ‚ΡŒ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ Π»ΠΈΠ±ΠΎ ΠΈΠ½ΠΈΡ†ΠΈΠΈΡ€ΠΎΠ²Π°Ρ‚ΡŒ
42 42 /// связанныС асинхронныС ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΈ, ΠΊΠΎΡ‚ΠΎΡ€Ρ‹Π΅ Ρ‚Π°ΠΊΠΆΠ΅ Π²ΠΎΠ·Π²Ρ€Π°Ρ‰Π°ΡŽΡ‚ обСщания. Для этого слСдуСт
43 43 /// ΠΈΡΠΏΠΎΠ»ΡŒΠ·ΠΎΠ²Π°Ρ‚ΡŒ ΡΠΎΠΎΡ‚Π²Π΅Ρ‚ΡΡ‚Π²ΡƒΡŽΡ‰ΡƒΡŽ Ρ„ΠΎΡ€ΠΌΡƒ ΠΌΠ΅Ρ‚ΠΎΠ΄Π΅ <c>Then</c>.
44 44 /// </para>
45 45 /// <para>
46 46 /// Π’Π°ΠΊΠΆΠ΅ Ρ…ΠΎΡ€ΠΎΡˆΠΈΠΌ ΠΏΡ€Π°Π²ΠΈΠ»ΠΎΠΌ являСтся Ρ‚ΠΎ, Ρ‡Ρ‚ΠΎ <c>Resolve</c> ΠΈ <c>Reject</c> Π΄ΠΎΠ»ΠΆΠ΅Π½ Π²Ρ‹Π·Ρ‹Π²Π°Ρ‚ΡŒ
47 47 /// Ρ‚ΠΎΠ»ΡŒΠΊΠΎ ΠΈΠ½ΠΈΡ†ΠΈΠ°Ρ‚ΠΎΡ€ обСщания ΠΈΠ½Π°Ρ‡Π΅ ΠΌΠΎΠ³ΡƒΡ‚ Π²ΠΎΠ·Π½ΠΈΠΊΠ½ΡƒΡ‚ΡŒ противорСчия.
48 48 /// </para>
49 49 /// </remarks>
50 50 public class Promise<T> : IPromise<T> {
51 51
52 52 struct HandlerDescriptor {
53 53 public ResultHandler<T> resultHandler;
54 54 public ErrorHandler errorHandler;
55 55 public Action cancellHandler;
56 56
57 57 public void Resolve(T result) {
58 58 if (resultHandler != null)
59 59 try {
60 60 resultHandler(result);
61 61 } catch (Exception e) {
62 62 Reject(e);
63 63 }
64 64 }
65 65
66 66 public void Reject(Exception err) {
67 67 if (errorHandler != null)
68 68 try {
69 69 errorHandler(err);
70 70 } catch {
71 71 }
72 72 }
73 73
74 74 public void Cancel() {
75 75 if (cancellHandler != null)
76 76 try {
77 77 cancellHandler();
78 78 } catch {
79 79 }
80 80 }
81 81 }
82 82
83 83 const int UnresolvedSate = 0;
84 84 const int TransitionalState = 1;
85 85 const int SucceededState = 2;
86 86 const int RejectedState = 3;
87 87 const int CancelledState = 4;
88 88
89 89 readonly IPromiseBase m_parent;
90 90 readonly bool m_cancellable;
91 91
92 92 int m_childrenCount = 0;
93 93 int m_state;
94 94 T m_result;
95 95 Exception m_error;
96 96
97 97 readonly MTQueue<HandlerDescriptor> m_handlers = new MTQueue<HandlerDescriptor>();
98 98
99 99 public Promise() {
100 100 m_cancellable = true;
101 101 }
102 102
103 103 public Promise(IPromiseBase parent, bool cancellable) {
104 104 m_cancellable = cancellable;
105 105 m_parent = parent;
106 106 }
107 107
108 108 void InternalCancel() {
109 109 // don't try to cancel parent :)
110 110 Cancel(false);
111 111 }
112 112
113 113 bool BeginTransit() {
114 114 return UnresolvedSate == Interlocked.CompareExchange(ref m_state, TransitionalState, UnresolvedSate);
115 115 }
116 116
117 117 void CompleteTransit(int state) {
118 118 if (TransitionalState != Interlocked.CompareExchange(ref m_state, state, TransitionalState))
119 119 throw new InvalidOperationException("Can't complete transition when the object isn't in the transitional state");
120 120 }
121 121
122 122 void WaitTransition() {
123 123 while (m_state == TransitionalState) {
124 124 /* noop */
125 125 }
126 126 }
127 127
128 128 public bool IsResolved {
129 129 get {
130 130 return m_state > 1;
131 131 }
132 132 }
133 133
134 134 public bool IsCancelled {
135 135 get {
136 136 return m_state == CancelledState;
137 137 }
138 138 }
139 139
140 140 /// <summary>
141 141 /// ВыполняСт ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅, сообщая ΠΎΠ± ΡƒΡΠΏΠ΅ΡˆΠ½ΠΎΠΌ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΈΠΈ.
142 142 /// </summary>
143 143 /// <param name="result">Π Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ выполнСния.</param>
144 144 /// <exception cref="InvalidOperationException">Π”Π°Π½Π½ΠΎΠ΅ ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅ ΡƒΠΆΠ΅ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΎ</exception>
145 145 public void Resolve(T result) {
146 146 if (BeginTransit()) {
147 147 m_result = result;
148 148 CompleteTransit(SucceededState);
149 149 OnStateChanged();
150 150 } else {
151 151 WaitTransition();
152 152 if (m_state != CancelledState)
153 153 throw new InvalidOperationException("The promise is already resolved");
154 154 }
155 155 }
156 156
157 157 /// <summary>
158 158 /// ВыполняСт ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅, сообщая ΠΎΠ± ошибкС
159 159 /// </summary>
160 160 /// <remarks>
161 161 /// ΠŸΠΎΡΠΊΠΎΠ»ΡŒΠΊΡƒ ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅ Π΄ΠΎΠ»ΠΆΠ½ΠΎ Ρ€Π°Π±ΠΎΡ‚Π°Ρ‚ΡŒ Π² ΠΌΠ½ΠΎΠ³ΠΎΠΏΡ‚ΠΎΡ‡Π½ΠΎΠΉ срСдС, ΠΏΡ€ΠΈ Π΅Π³ΠΎ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΈΠΈ сразу нСсколько ΠΏΠΎΡ‚ΠΎΠΊΠΎΠ²
162 162 /// ΠΌΠΎΠ³Ρƒ Π²Π΅Ρ€Π½ΡƒΡ‚ΡŒ ΠΎΡˆΠΈΠ±ΠΊΡƒ, ΠΏΡ€ΠΈ этом Ρ‚ΠΎΠ»ΡŒΠΊΠΎ пСрвая Π±ΡƒΠ΄Π΅Ρ‚ использована Π² качСствС Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Π°, ΠΎΡΡ‚Π°Π»ΡŒΠ½Ρ‹Π΅
163 163 /// Π±ΡƒΠ΄ΡƒΡ‚ ΠΏΡ€ΠΎΠΈΠ³Π½ΠΎΡ€ΠΈΡ€ΠΎΠ²Π°Π½Ρ‹.
164 164 /// </remarks>
165 165 /// <param name="error">Π˜ΡΠΊΠ»ΡŽΡ‡Π΅Π½ΠΈΠ΅ возникшСС ΠΏΡ€ΠΈ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΈΠΈ ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΈ</param>
166 166 /// <exception cref="InvalidOperationException">Π”Π°Π½Π½ΠΎΠ΅ ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅ ΡƒΠΆΠ΅ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΎ</exception>
167 167 public void Reject(Exception error) {
168 168 if (BeginTransit()) {
169 169 m_error = error;
170 170 CompleteTransit(RejectedState);
171 171 OnStateChanged();
172 172 } else {
173 173 WaitTransition();
174 174 if (m_state == SucceededState)
175 175 throw new InvalidOperationException("The promise is already resolved");
176 176 }
177 177 }
178 178
179 179 /// <summary>
180 180 /// ΠžΡ‚ΠΌΠ΅Π½ΡΠ΅Ρ‚ ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΡŽ, Ссли это Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎ.
181 181 /// </summary>
182 182 /// <returns><c>true</c> ΠžΠΏΠ΅Ρ€Π°Ρ†ΠΈΡ Π±Ρ‹Π»Π° ΠΎΡ‚ΠΌΠ΅Π½Π΅Π½Π°, ΠΎΠ±Ρ€Π°Π±ΠΎΡ‚Ρ‡ΠΈΠΊΠΈ Π½Π΅ Π±ΡƒΠ΄ΡƒΡ‚ Π²Ρ‹Π·Π²Π°Π½Ρ‹.<c>false</c> ΠΎΡ‚ΠΌΠ΅Π½Π° Π½Π΅ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½Π°, ΠΏΠΎΡΠΊΠΎΠ»ΡŒΠΊΡƒ ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅ ΡƒΠΆΠ΅ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΎ ΠΈ ΠΎΠ±Ρ€Π°Π±ΠΎΡ‚Ρ‡ΠΈΠΊΠΈ ΠΎΡ‚Ρ€Π°Π±ΠΎΡ‚Π°Π»ΠΈ.</returns>
183 183 public bool Cancel() {
184 184 return Cancel(true);
185 185 }
186 186
187 187 /// <summary>
188 188 /// Adds new handlers to this promise.
189 189 /// </summary>
190 190 /// <param name="success">The handler of the successfully completed operation.
191 191 /// This handler will recieve an operation result as a parameter.</param>
192 192 /// <param name="error">Handles an exception that may occur during the operation.</param>
193 193 /// <returns>The new promise chained to this one.</returns>
194 public Promise<T> Then(ResultHandler<T> success, ErrorHandler error) {
194 public IPromise<T> Then(ResultHandler<T> success, ErrorHandler error) {
195 195 if (success == null && error == null)
196 196 return this;
197 197
198 198 var medium = new Promise<T>(this, true);
199 199
200 200 ResultHandler<T> resultHandler;
201 201 if (success != null)
202 202 resultHandler = x => {
203 203 success(x);
204 204 medium.Resolve(x);
205 205 };
206 206 else
207 207 resultHandler = medium.Resolve;
208 208
209 209 ErrorHandler errorHandler;
210 210 if (error != null)
211 211 errorHandler = x => {
212 212 // нСсмотря Π½Π° Ρ‚ΠΎ, Ρ‡Ρ‚ΠΎ ΠΎΠ±Ρ€Π°Π±ΠΎΡ‚Ρ‡ΠΈΠΊ ошибки вызываСтся бСзопасно,
213 213 // Ρ‚.Π΅. возникшиС Π² Π½Π΅ΠΌ ошибки Π±ΡƒΠ΄ΡƒΡ‚ ΠΏΠΎΠ΄Π°Π²Π»Π΅Π½Ρ‹, Π½Π°ΠΌ Π½ΡƒΠΆΠ½ΠΎ
214 214 // Π³Π°Ρ€Π°Π½Ρ‚ΠΈΡ€ΠΎΠ²Π°Ρ‚ΡŒ, Ρ‡Ρ‚ΠΎ ошибка Π±ΡƒΠ΄Π΅Ρ‚ ΠΏΠ΅Ρ€Π΅Π΄Π°Π½Π° дальшС ΠΏΠΎ Ρ†Π΅ΠΏΠΎΡ‡ΠΊΠ΅ ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠΉ
215 215 try {
216 216 error(x);
217 217 } catch { }
218 218 medium.Reject(x);
219 219 };
220 220 else
221 221 errorHandler = medium.Reject;
222 222
223 223 AddHandler(resultHandler, errorHandler, medium.InternalCancel);
224 224
225 225 return medium;
226 226 }
227 227
228 public IPromiseBase Then(Action success,ErrorHandler error)
229 {
230 return Then(x => success(), error);
231 }
232
233 public IPromiseBase Then(Action success)
234 {
235 return Then(success);
236 }
237
228 238 /// <summary>
229 239 /// Adds new handlers to this promise.
230 240 /// </summary>
231 241 /// <param name="success">The handler of the successfully completed operation.
232 242 /// This handler will recieve an operation result as a parameter.</param>
233 243 /// <param name="error">Handles an exception that may occur during the operation and returns the value which will be used as the result of the operation.</param>
234 244 /// <returns>The new promise chained to this one.</returns>
235 public Promise<T> Then(ResultHandler<T> success, ErrorHandler<T> error) {
245 public IPromise<T> Then(ResultHandler<T> success, ErrorHandler<T> error) {
236 246 if (success == null && error == null)
237 247 return this;
238 248
239 249 var medium = new Promise<T>(this, true);
240 250
241 251 ResultHandler<T> resultHandler;
242 252 ErrorHandler errorHandler;
243 253
244 254 if (success != null)
245 255 resultHandler = x => {
246 256 success(x);
247 257 medium.Resolve(x);
248 258 };
249 259 else
250 260 resultHandler = medium.Resolve;
251 261
252 262 if (error != null)
253 263 errorHandler = x => {
254 264 try {
255 265 medium.Resolve(error(x));
256 266 } catch(Exception e) {
257 267 medium.Reject(e);
258 268 }
259 269 };
260 270 else
261 271 errorHandler = medium.Reject;
262 272
263 273 AddHandler(resultHandler, errorHandler, medium.InternalCancel);
264 274
265 275 return medium;
266 276 }
267 277
268 278
269 public Promise<T> Then(ResultHandler<T> success) {
279 public IPromise<T> Then(ResultHandler<T> success) {
270 280 if (success == null)
271 281 return this;
272 282
273 283 var medium = new Promise<T>(this, true);
274 284
275 285 ResultHandler<T> resultHandler;
276 286
277 287 if (success != null)
278 288 resultHandler = x => {
279 289 success(x);
280 290 medium.Resolve(x);
281 291 };
282 292 else
283 293 resultHandler = medium.Resolve;
284 294
285 295 AddHandler(resultHandler, medium.Reject, medium.InternalCancel);
286 296
287 297 return medium;
288 298 }
289 299
290 public Promise<T> Error(ErrorHandler error) {
291 return Then(null, error);
300 public IPromise<T> Error(ErrorHandler error) {
301 return Then((ResultHandler<T>)null, error);
292 302 }
293 303
294 304 /// <summary>
295 305 /// Handles error and allows to keep the promise.
296 306 /// </summary>
297 307 /// <remarks>
298 308 /// If the specified handler throws an exception, this exception will be used to reject the promise.
299 309 /// </remarks>
300 310 /// <param name="handler">The error handler which returns the result of the promise.</param>
301 311 /// <returns>New promise.</returns>
302 public Promise<T> Error(ErrorHandler<T> handler) {
312 public IPromise<T> Error(ErrorHandler<T> handler) {
303 313 if (handler == null)
304 314 return this;
305 315
306 316 var medium = new Promise<T>(this, true);
307 317
308 318 AddHandler(
309 319 null,
310 320 e => {
311 321 try {
312 322 medium.Resolve(handler(e));
313 323 } catch (Exception e2) {
314 324 medium.Reject(e2);
315 325 }
316 326 },
317 327 medium.InternalCancel
318 328 );
319 329
320 330 return medium;
321 331 }
322 332
323 public Promise<T> Anyway(Action handler) {
333 public IPromise<T> Anyway(Action handler) {
324 334 if (handler == null)
325 335 return this;
326 336
327 337 var medium = new Promise<T>();
328 338
329 339 AddHandler(
330 340 x => {
331 341 // to avoid handler being called multiple times we handle exception by ourselfs
332 342 try {
333 343 handler();
334 344 medium.Resolve(x);
335 345 } catch (Exception e) {
336 346 medium.Reject(e);
337 347 }
338 348 },
339 349
340 350 e => {
341 351 try {
342 352 handler();
343 353 } catch { }
344 354 medium.Reject(e);
345 355 },
346 356
347 357 medium.InternalCancel
348 358 );
349 359
350 360 return medium;
351 361 }
352 362
353 363 /// <summary>
354 364 /// ΠŸΠΎΠ·Π²ΠΎΠ»ΡΠ΅Ρ‚ ΠΏΡ€Π΅ΠΎΠ±Ρ€Π°Π·ΠΎΠ²Π°Ρ‚ΡŒ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ выполСния ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΈ ΠΊ Π½ΠΎΠ²ΠΎΠΌΡƒ Ρ‚ΠΈΠΏΡƒ.
355 365 /// </summary>
356 366 /// <typeparam name="TNew">Новый Ρ‚ΠΈΠΏ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Π°.</typeparam>
357 367 /// <param name="mapper">ΠŸΡ€Π΅ΠΎΠ±Ρ€Π°Π·ΠΎΠ²Π°Π½ΠΈΠ΅ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Π° ΠΊ Π½ΠΎΠ²ΠΎΠΌΡƒ Ρ‚ΠΈΠΏΡƒ.</param>
358 368 /// <param name="error">ΠžΠ±Ρ€Π°Π±ΠΎΡ‚Ρ‡ΠΈΠΊ ошибки. Π”Π°Π½Π½Ρ‹ΠΉ ΠΎΠ±Ρ€Π°Π±ΠΎΡ‚Ρ‡ΠΈΠΊ ΠΏΠΎΠ»ΡƒΡ‡ΠΈΡ‚
359 369 /// ΠΈΡΠΊΠ»ΡŽΡ‡Π΅Π½ΠΈΠ΅ возникшСС ΠΏΡ€ΠΈ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΈΠΈ ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΈ.</param>
360 370 /// <returns>НовоС ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅, ΠΊΠΎΡ‚ΠΎΡ€ΠΎΠ΅ Π±ΡƒΠ΄Π΅Ρ‚ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΎ ΠΏΡ€ΠΈ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΈΠΈ исходного обСщания.</returns>
361 public Promise<TNew> Map<TNew>(ResultMapper<T, TNew> mapper, ErrorHandler error) {
371 public IPromise<TNew> Map<TNew>(ResultMapper<T, TNew> mapper, ErrorHandler error) {
362 372 if (mapper == null)
363 373 throw new ArgumentNullException("mapper");
364 374
365 375 // создаСм ΠΏΡ€ΠΈΡ†Π΅ΠΏΠ»Π΅Π½Π½ΠΎΠ΅ ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅
366 376 var chained = new Promise<TNew>();
367 377
368 378 ResultHandler<T> resultHandler = result => chained.Resolve(mapper(result));
369 379 ErrorHandler errorHandler = delegate(Exception e) {
370 380 if (error != null)
371 381 try {
372 382 error(e);
373 383 } catch { }
374 384 // Π² случаС ошибки Π½ΡƒΠΆΠ½ΠΎ ΠΏΠ΅Ρ€Π΅Π΄Π°Ρ‚ΡŒ ΠΈΡΠΊΠ»ΡŽΡ‡Π΅Π½ΠΈΠ΅ дальшС ΠΏΠΎ Ρ†Π΅ΠΏΠΎΡ‡ΠΊΠ΅
375 385 chained.Reject(e);
376 386 };
377 387
378 388
379 389 AddHandler(
380 390 resultHandler,
381 391 errorHandler,
382 392 chained.InternalCancel
383 393 );
384 394
385 395 return chained;
386 396 }
387 397
388 public Promise<TNew> Map<TNew>(ResultMapper<T, TNew> mapper) {
398 public IPromise<TNew> Map<TNew>(ResultMapper<T, TNew> mapper) {
389 399 return Map(mapper, null);
390 400 }
391 401
392 402 /// <summary>
393 403 /// БцСпляСт нСсколько аснхронных ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΉ. Указанная асинхронная опСрация Π±ΡƒΠ΄Π΅Ρ‚ Π²Ρ‹Π·Π²Π°Π½Π° послС
394 404 /// выполнСния Ρ‚Π΅ΠΊΡƒΡ‰Π΅ΠΉ, Π° Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ Ρ‚Π΅ΠΊΡƒΡ‰Π΅ΠΉ ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΈ ΠΌΠΎΠΆΠ΅Ρ‚ Π±Ρ‹Ρ‚ΡŒ использован для ΠΈΠ½ΠΈΡ†ΠΈΠ°Π»ΠΈΠ·Π°Ρ†ΠΈΠΈ
395 405 /// Π½ΠΎΠ²ΠΎΠΉ ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΈ.
396 406 /// </summary>
397 407 /// <typeparam name="TNew">Π’ΠΈΠΏ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Π° ΡƒΠΊΠ°Π·Π°Π½Π½ΠΎΠΉ асинхронной ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΈ.</typeparam>
398 408 /// <param name="chained">Асинхронная опСрация, которая Π΄ΠΎΠ»ΠΆΠ½Π° Π±ΡƒΠ΄Π΅Ρ‚ Π½Π°Ρ‡Π°Ρ‚ΡŒΡΡ послС выполнСния Ρ‚Π΅ΠΊΡƒΡ‰Π΅ΠΉ.</param>
399 409 /// <param name="error">ΠžΠ±Ρ€Π°Π±ΠΎΡ‚Ρ‡ΠΈΠΊ ошибки. Π”Π°Π½Π½Ρ‹ΠΉ ΠΎΠ±Ρ€Π°Π±ΠΎΡ‚Ρ‡ΠΈΠΊ ΠΏΠΎΠ»ΡƒΡ‡ΠΈΡ‚
400 410 /// ΠΈΡΠΊΠ»ΡŽΡ‡Π΅Π½ΠΈΠ΅ возникшСС ΠΏΡ€ΠΈ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΈΠΈ Ρ‚Π΅ΠΊΡƒΠ΅Ρ‰ΠΉ ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΈ.</param>
401 411 /// <returns>НовоС ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅, ΠΊΠΎΡ‚ΠΎΡ€ΠΎΠ΅ Π±ΡƒΠ΄Π΅Ρ‚ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΎ ΠΏΠΎ ΠΎΠΊΠΎΠ½Ρ‡Π°Π½ΠΈΡŽ ΡƒΠΊΠ°Π·Π°Π½Π½ΠΎΠΉ аснхронной ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΈ.</returns>
402 public Promise<TNew> Chain<TNew>(ChainedOperation<T, TNew> chained, ErrorHandler error) {
412 public IPromise<TNew> Chain<TNew>(ChainedOperation<T, TNew> chained, ErrorHandler error) {
403 413
404 414 // ΠΏΡ€ΠΎΠ±Π»Π΅ΠΌΠ° Π² Ρ‚ΠΎΠΌ, Ρ‡Ρ‚ΠΎ Π½Π° ΠΌΠΎΠΌΠ΅Π½Ρ‚ связывания Π΅Ρ‰Π΅ Π½Π΅ Π½Π°Ρ‡Π°Ρ‚Π° асинхронная опСрация, поэтому Π½ΡƒΠΆΠ½ΠΎ
405 415 // ΡΠΎΠ·Π΄Π°Ρ‚ΡŒ посрСдника, ΠΊ ΠΊΠΎΡ‚ΠΎΡ€ΠΎΠΌΡƒ Π±ΡƒΠ΄ΡƒΡ‚ ΠΏΠΎΠ΄Π²Ρ‹Π·ΡΠ²Π°Ρ‚ΡŒΡΡ ΡΠ»Π΅Π΄ΡƒΡŽΡ‰ΠΈΠ΅ ΠΎΠ±Ρ€Π°Π±ΠΎΡ‚Ρ‡ΠΈΠΊΠΈ.
406 416 // ΠΊΠΎΠ³Π΄Π° Π±ΡƒΠ΄Π΅Ρ‚ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½Π° Ρ€Π΅Π°Π»ΡŒΠ½Π°Ρ асинхронная опСрация, ΠΎΠ½Π° ΠΎΠ±Ρ€Π°Ρ‚ΠΈΡ‚ΡŒΡΡ ΠΊ посрСднику, Ρ‡Ρ‚ΠΎΠ±Ρ‹
407 417 // ΠΏΠ΅Ρ€Π΅Π΄Π°Ρ‚ΡŒ Ρ‡Π΅Ρ€Π΅Π· Π½Π΅Π³ΠΎ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ Ρ€Π°Π±ΠΎΡ‚Ρ‹.
408 418 var medium = new Promise<TNew>(this, true);
409 419
410 420 ResultHandler<T> resultHandler = delegate(T result) {
411 421 if (medium.IsCancelled)
412 422 return;
413 423
414 424 var promise = chained(result);
415 425
416 426 // notify chained operation that it's not needed
417 427 medium.Cancelled(() => promise.Cancel());
418 428 promise.Then(
419 429 x => medium.Resolve(x),
420 430 e => medium.Reject(e)
421 431 );
422 432 };
423 433
424 434 ErrorHandler errorHandler = delegate(Exception e) {
425 435 if (error != null)
426 436 error(e);
427 437 // Π² случаС ошибки Π½ΡƒΠΆΠ½ΠΎ ΠΏΠ΅Ρ€Π΅Π΄Π°Ρ‚ΡŒ ΠΈΡΠΊΠ»ΡŽΡ‡Π΅Π½ΠΈΠ΅ дальшС ΠΏΠΎ Ρ†Π΅ΠΏΠΎΡ‡ΠΊΠ΅
428 438 medium.Reject(e);
429 439 };
430 440
431 441 AddHandler(
432 442 resultHandler,
433 443 errorHandler,
434 444 medium.InternalCancel
435 445 );
436 446
437 447 return medium;
438 448 }
439 449
440 public Promise<TNew> Chain<TNew>(ChainedOperation<T, TNew> chained) {
450 public IPromise<TNew> Chain<TNew>(ChainedOperation<T, TNew> chained) {
441 451 return Chain(chained, null);
442 452 }
443 453
444 public Promise<T> Cancelled(Action handler) {
454 public IPromise<T> Cancelled(Action handler) {
445 455 AddHandler(null, null, handler);
446 456 return this;
447 457 }
448 458
449 459 /// <summary>
450 460 /// Adds the specified handler for all cases (success, error, cancel)
451 461 /// </summary>
452 462 /// <param name="handler">The handler that will be called anyway</param>
453 463 /// <returns>self</returns>
454 public Promise<T> Finally(Action handler) {
464 public IPromise<T> Finally(Action handler) {
455 465 if (handler == null)
456 466 throw new ArgumentNullException("handler");
457 467 AddHandler(
458 468 x => handler(),
459 469 e => handler(),
460 470 handler
461 471 );
462 472 return this;
463 473 }
464 474
465 475 /// <summary>
466 476 /// ДоТидаСтся ΠΎΡ‚Π»ΠΎΠΆΠ΅Π½Π½ΠΎΠ³ΠΎ обСщания ΠΈ Π² случаС успСха, Π²ΠΎΠ·Π²Ρ€Π°Ρ‰Π°Π΅Ρ‚
467 477 /// Π΅Π³ΠΎ, Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚, Π² ΠΏΡ€ΠΎΡ‚ΠΈΠ²Π½ΠΎΠΌ случаС бросаСт ΠΈΡΠΊΠ»ΡŽΡ‡Π΅Π½ΠΈΠ΅.
468 478 /// </summary>
469 479 /// <remarks>
470 480 /// <para>
471 481 /// Если ΠΎΠΆΠΈΠ΄Π°Π½ΠΈΠ΅ обСщания Π±Ρ‹Π»ΠΎ ΠΏΡ€Π΅Ρ€Π²Π°Π½ΠΎ ΠΏΠΎ Ρ‚Π°ΠΉΠΌΠ°ΡƒΡ‚Ρƒ, это Π½Π΅ Π·Π½Π°Ρ‡ΠΈΡ‚,
472 482 /// Ρ‡Ρ‚ΠΎ ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅ Π±Ρ‹Π»ΠΎ ΠΎΡ‚ΠΌΠ΅Π½Π΅Π½ΠΎ ΠΈΠ»ΠΈ Ρ‡Ρ‚ΠΎ-Ρ‚ΠΎ Π² этом Ρ€ΠΎΠ΄Π΅, это Ρ‚ΠΎΠ»ΡŒΠΊΠΎ
473 483 /// ΠΎΠ·Π½Π°Ρ‡Π°Π΅Ρ‚, Ρ‡Ρ‚ΠΎ ΠΌΡ‹ Π΅Π³ΠΎ Π½Π΅ доТдались, ΠΎΠ΄Π½Π°ΠΊΠΎ всС зарСгистрированныС
474 484 /// ΠΎΠ±Ρ€Π°Π±ΠΎΡ‚Ρ‡ΠΈΠΊΠΈ, ΠΊΠ°ΠΊ Π±Ρ‹Π»ΠΈ Ρ‚Π°ΠΊ ΠΎΡΡ‚Π°Π»ΠΈΡΡŒ ΠΈ ΠΎΠ½ΠΈ Π±ΡƒΠ΄ΡƒΡ‚ Π²Ρ‹Π·Π²Π°Π½Ρ‹, ΠΊΠΎΠ³Π΄Π°
475 485 /// ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅ Π±ΡƒΠ΄Π΅Ρ‚ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΎ.
476 486 /// </para>
477 487 /// <para>
478 488 /// Π’Π°ΠΊΠΎΠ΅ ΠΏΠΎΠ²Π΅Π΄Π΅Π½ΠΈΠ΅ Π²ΠΏΠΎΠ»Π½Π΅ ΠΎΠΏΡ€Π°Π²Π΄Π°Π½ΠΎ ΠΏΠΎΡΠΊΠΎΠ»ΡŒΠΊΡƒ Ρ‚Π°ΠΉΠΌΠ°ΡƒΡ‚ ΠΌΠΎΠΆΠ΅Ρ‚ ΠΈΡΡ‚Π΅Ρ‡ΡŒ
479 489 /// Π² Ρ‚ΠΎΡ‚ ΠΌΠΎΠΌΠ΅Π½Ρ‚, ΠΊΠΎΠ³Π΄Π° Π½Π°Ρ‡Π°Π»Π°ΡΡŒ ΠΎΠ±Ρ€Π°Π±ΠΎΡ‚ΠΊΠ° Ρ†Π΅ΠΏΠΎΡ‡ΠΊΠΈ ΠΎΠ±Ρ€Π°Π±ΠΎΡ‚Ρ‡ΠΈΠΊΠΎΠ², ΠΈ
480 490 /// ΠΊ Ρ‚ΠΎΠΌΡƒ ΠΆΠ΅ Ρ‚Π΅ΠΊΡƒΡ‰Π΅Π΅ ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅ ΠΌΠΎΠΆΠ΅Ρ‚ ΡΡ‚ΠΎΡΡ‚ΡŒ Π² Ρ†Π΅ΠΏΠΎΡ‡ΠΊΠ΅ ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠΉ ΠΈ Π΅Π³ΠΎ
481 491 /// ΠΎΡ‚ΠΊΠ»ΠΎΠ½Π΅Π½ΠΈΠ΅ ΠΌΠΎΠΆΠ΅Ρ‚ привСсти ΠΊ Π½Π΅ΠΏΡ€ΠΎΠ³Π½ΠΎΠ·ΠΈΡ€ΡƒΠ΅ΠΌΠΎΠΌΡƒ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρƒ.
482 492 /// </para>
483 493 /// </remarks>
484 494 /// <param name="timeout">ВрСмя оТидания</param>
485 495 /// <returns>Π Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ выполнСния обСщания</returns>
486 496 public T Join(int timeout) {
487 497 var evt = new ManualResetEvent(false);
488 498 Anyway(() => evt.Set());
489 499 Cancelled(() => evt.Set());
490 500
491 501 if (!evt.WaitOne(timeout, true))
492 502 throw new TimeoutException();
493 503
494 504 switch (m_state) {
495 505 case SucceededState:
496 506 return m_result;
497 507 case CancelledState:
498 508 throw new OperationCanceledException();
499 509 case RejectedState:
500 510 throw new TargetInvocationException(m_error);
501 511 default:
502 512 throw new ApplicationException(String.Format("Invalid promise state {0}", m_state));
503 513 }
504 514 }
505 515
506 516 public T Join() {
507 517 return Join(Timeout.Infinite);
508 518 }
509 519
510 520 void AddHandler(ResultHandler<T> success, ErrorHandler error, Action cancel) {
511 521 Interlocked.Increment(ref m_childrenCount);
512 522
513 523 HandlerDescriptor handler = new HandlerDescriptor {
514 524 resultHandler = success,
515 525 errorHandler = error,
516 526 cancellHandler = cancel
517 527 };
518 528
519 529 bool queued;
520 530
521 531 if (!IsResolved) {
522 532 m_handlers.Enqueue(handler);
523 533 queued = true;
524 534 } else {
525 535 // the promise is in resolved state, just invoke the handled with minimum overhead
526 536 queued = false;
527 537 InvokeHandler(handler);
528 538 }
529 539
530 540 if (queued && IsResolved && m_handlers.TryDequeue(out handler))
531 541 // if the promise have been resolved while we was adding handler to the queue
532 542 // we can't guarantee that someone is still processing it
533 543 // therefore we will fetch a handler from the queue and execute it
534 544 // note that fetched handler may be not the one we have added
535 545 InvokeHandler(handler);
536 546
537 547 }
538 548
539 549 void InvokeHandler(HandlerDescriptor handler) {
540 550 switch (m_state) {
541 551 case SucceededState:
542 552 handler.Resolve(m_result);
543 553 break;
544 554 case RejectedState:
545 555 handler.Reject(m_error);
546 556 break;
547 557 case CancelledState:
548 558 handler.Cancel();
549 559 break;
550 560 default:
551 561 // do nothing
552 562 return;
553 563 }
554 564 }
555 565
556 566 protected virtual void OnStateChanged() {
557 567 HandlerDescriptor handler;
558 568 while (m_handlers.TryDequeue(out handler))
559 569 InvokeHandler(handler);
560 570 }
561 571
562 572 public bool IsExclusive {
563 573 get {
564 574 return m_childrenCount <= 1;
565 575 }
566 576 }
567 577
568 578 protected bool Cancel(bool dependencies) {
569 579 if (BeginTransit()) {
570 580 CompleteTransit(CancelledState);
571 581 OnStateChanged();
572 582
573 583 if (dependencies && m_parent != null && m_parent.IsExclusive)
574 584 m_parent.Cancel();
575 585
576 586 return true;
577 587 } else {
578 588 return false;
579 589 }
580 590 }
581 591
582 592 /// <summary>
583 593 /// ΠžΠ±ΡŠΠ΅Π΄ΠΈΠ½ΡΠ΅Ρ‚ нСсколько ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠΉ Π² ΠΎΠ΄Π½ΠΎ, Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ΠΎΠΌ ΠΊΠΎΡ‚ΠΎΡ€ΠΎΠ³ΠΎ являСтся массив Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ΠΎΠ² Π΄Ρ€ΡƒΠ³ΠΈΡ… ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠΉ.
584 594 /// Если хотябы ΠΎΠ΄Π½ΠΎ ΠΈΠ· ΠΏΠ΅Ρ€Π΅Π΄Π°Π½Π½Ρ‹Ρ… ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠΉ Π½Π΅ Π±ΡƒΠ΄Π΅Ρ‚ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΎ, Ρ‚ΠΎ Π½ΠΎΠ²ΠΎΠ΅ ΠΎΠ±Π΅Ρ‰Π΅Π½ΠΈΠ΅ Ρ‚ΠΎΠΆΠ΅ Π½Π΅ Π±ΡƒΠ΄Π΅Ρ‚ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΎ.
585 595 /// ΠŸΡ€ΠΈ ΠΎΡ‚ΠΌΠ΅Π½Π΅ Π½ΠΎΠ²ΠΎΠ³ΠΎ обСщания, ΠΏΠ΅Ρ€Π΅Π΄Π°Π½Π½Ρ‹Π΅ обСщания Ρ‚Π°ΠΊΠΆΠ΅ Π±ΡƒΠ΄ΡƒΡ‚ ΠΎΡ‚ΠΌΠ΅Π½Π΅Π½Ρ‹, Ссли Π½ΠΈΠΊΡ‚ΠΎ большС Π½Π° Π½ΠΈΡ… Π½Π΅ подписан.
586 596 /// </summary>
587 597 /// <param name="promises">Бписок ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠΉ. Если список пустой, Ρ‚ΠΎ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚ΠΈΡ€ΡƒΡŽΡ‰Π΅Π΅ ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅ возвращаСтся ΡƒΠΆΠ΅ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½Π½Ρ‹ΠΌ.</param>
588 598 /// <returns>ΠžΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅ ΠΎΠ±ΡŠΠ΅Π΄ΠΈΠ½ΡΡŽΡ‰Π΅Π΅ Π² сСбС Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ ΠΏΠ΅Ρ€Π΅Π΄Π°Π½Π½Ρ‹Ρ… ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠΉ.</returns>
589 599 /// <exception cref="ArgumentNullException"><paramref name="promises"/> Π½Π΅ ΠΌΠΎΠΆΠ΅Ρ‚ Π±Ρ‹Ρ‚ΡŒ null</exception>
590 600 public static Promise<T[]> CreateComposite(IList<Promise<T>> promises) {
591 601 if (promises == null)
592 602 throw new ArgumentNullException();
593 603
594 604 // создаСм аккумулятор для Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ΠΎΠ² ΠΈ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚ΠΈΡ€ΡƒΡŽΡ‰Π΅Π΅ ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅
595 605 var result = new T[promises.Count];
596 606 var promise = new Promise<T[]>();
597 607
598 608 // special case
599 609 if (promises.Count == 0) {
600 610 promise.Resolve(result);
601 611 return promise;
602 612 }
603 613
604 614 int pending = promises.Count;
605 615
606 616 for (int i = 0; i < promises.Count; i++) {
607 617 var dest = i;
608 618
609 619 promises[i].Then(
610 620 x => {
611 621 result[dest] = x;
612 622 if(Interlocked.Decrement(ref pending) == 0)
613 623 promise.Resolve(result);
614 624 },
615 625 e => promise.Reject(e)
616 626 );
617 627 }
618 628
619 629 promise.Cancelled(
620 630 () => {
621 631 foreach(var d in promises)
622 632 if(d.IsExclusive)
623 633 d.Cancel();
624 634 }
625 635 );
626 636
627 637 return promise;
628 638 }
629 639
630 640 public static Promise<T> ResultToPromise(T result) {
631 641 var p = new Promise<T>();
632 642 p.Resolve(result);
633 643 return p;
634 644 }
635 645
636 646 public static Promise<T> ExceptionToPromise(Exception error) {
637 647 if (error == null)
638 648 throw new ArgumentNullException();
639 649
640 650 var p = new Promise<T>();
641 651 p.Reject(error);
642 652 return p;
643 653 }
644 654
645 655 }
646 656 }
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