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1 1 using System;
2 2 using Microsoft.VisualStudio.TestTools.UnitTesting;
3 3 using System.Reflection;
4 4 using System.Threading;
5 5 using Implab.Parallels;
6 6
7 7 namespace Implab.Test {
8 8 [TestClass]
9 9 public class AsyncTests {
10 10 [TestMethod]
11 11 public void ResolveTest() {
12 12 int res = -1;
13 13 var p = new Promise<int>();
14 14 p.Then(x => res = x);
15 15 p.Resolve(100);
16 16
17 17 Assert.AreEqual(100, res);
18 18 }
19 19
20 20 [TestMethod]
21 21 public void RejectTest() {
22 22 int res = -1;
23 23 Exception err = null;
24 24
25 25 var p = new Promise<int>();
26 26 p.Then(x => res = x, e => err = e);
27 27 p.Reject(new ApplicationException("error"));
28 28
29 29 Assert.AreEqual(res, -1);
30 30 Assert.AreEqual(err.Message, "error");
31 31
32 32 }
33 33
34 34 [TestMethod]
35 35 public void JoinSuccessTest() {
36 36 var p = new Promise<int>();
37 37 p.Resolve(100);
38 38 Assert.AreEqual(p.Join(), 100);
39 39 }
40 40
41 41 [TestMethod]
42 42 public void JoinFailTest() {
43 43 var p = new Promise<int>();
44 44 p.Reject(new ApplicationException("failed"));
45 45
46 46 try {
47 47 p.Join();
48 48 throw new ApplicationException("WRONG!");
49 49 } catch (TargetInvocationException err) {
50 50 Assert.AreEqual(err.InnerException.Message, "failed");
51 51 } catch {
52 52 Assert.Fail("Got wrong excaption");
53 53 }
54 54 }
55 55
56 56 [TestMethod]
57 57 public void MapTest() {
58 58 var p = new Promise<int>();
59 59
60 60 var p2 = p.Map(x => x.ToString());
61 61 p.Resolve(100);
62 62
63 63 Assert.AreEqual(p2.Join(), "100");
64 64 }
65 65
66 66 [TestMethod]
67 67 public void FixErrorTest() {
68 68 var p = new Promise<int>();
69 69
70 70 var p2 = p.Error(e => 101);
71 71
72 72 p.Reject(new Exception());
73 73
74 74 Assert.AreEqual(p2.Join(), 101);
75 75 }
76 76
77 77 [TestMethod]
78 78 public void ChainTest() {
79 79 var p1 = new Promise<int>();
80 80
81 81 var p3 = p1.Chain(x => {
82 82 var p2 = new Promise<string>();
83 83 p2.Resolve(x.ToString());
84 84 return p2;
85 85 });
86 86
87 87 p1.Resolve(100);
88 88
89 89 Assert.AreEqual(p3.Join(), "100");
90 90 }
91 91
92 92 [TestMethod]
93 93 public void PoolTest() {
94 94 var pid = Thread.CurrentThread.ManagedThreadId;
95 95 var p = AsyncPool.Invoke(() => Thread.CurrentThread.ManagedThreadId);
96 96
97 97 Assert.AreNotEqual(pid, p.Join());
98 98 }
99 99
100 100 [TestMethod]
101 101 public void WorkerPoolSizeTest() {
102 102 var pool = new WorkerPool(5, 10, 0);
103 103
104 104 Assert.AreEqual(5, pool.PoolSize);
105 105
106 106 pool.Invoke(() => { Thread.Sleep(100000000); return 10; });
107 107 pool.Invoke(() => { Thread.Sleep(100000000); return 10; });
108 108 pool.Invoke(() => { Thread.Sleep(100000000); return 10; });
109 109
110 110 Assert.AreEqual(5, pool.PoolSize);
111 111
112 112 for (int i = 0; i < 100; i++)
113 113 pool.Invoke(() => { Thread.Sleep(100000000); return 10; });
114 114 Thread.Sleep(200);
115 115 Assert.AreEqual(10, pool.PoolSize);
116 116
117 117 pool.Dispose();
118 118 }
119 119
120 120 [TestMethod]
121 121 public void WorkerPoolCorrectTest() {
122 122 var pool = new WorkerPool(0,1000,100);
123 123
124 124 int iterations = 1000;
125 125 int pending = iterations;
126 126 var stop = new ManualResetEvent(false);
127 127
128 128 var count = 0;
129 129 for (int i = 0; i < iterations; i++) {
130 130 pool
131 131 .Invoke(() => 1)
132 132 .Then(x => Interlocked.Add(ref count, x))
133 133 .Then(x => Math.Log10(x))
134 134 .Anyway(() => {
135 135 Interlocked.Decrement(ref pending);
136 136 if (pending == 0)
137 137 stop.Set();
138 138 });
139 139 }
140 140
141 141 stop.WaitOne();
142 142
143 143 Assert.AreEqual(iterations, count);
144 144 Console.WriteLine("Max threads: {0}", pool.MaxRunningThreads);
145 145 pool.Dispose();
146 146
147 147 }
148 148
149 149 [TestMethod]
150 150 public void WorkerPoolDisposeTest() {
151 151 var pool = new WorkerPool(5, 20);
152 152 Assert.AreEqual(5, pool.PoolSize);
153 153 pool.Dispose();
154 154 Thread.Sleep(500);
155 155 Assert.AreEqual(0, pool.PoolSize);
156 156 pool.Dispose();
157 157 }
158 158
159 159 [TestMethod]
160 160 public void MTQueueTest() {
161 161 var queue = new MTQueue<int>();
162 162 int res;
163 163
164 164 queue.Enqueue(10);
165 165 Assert.IsTrue(queue.TryDequeue(out res));
166 166 Assert.AreEqual(10, res);
167 167 Assert.IsFalse(queue.TryDequeue(out res));
168 168
169 169 for (int i = 0; i < 1000; i++)
170 170 queue.Enqueue(i);
171 171
172 172 for (int i = 0; i < 1000; i++) {
173 173 queue.TryDequeue(out res);
174 174 Assert.AreEqual(i, res);
175 175 }
176 176
177 177 int writers = 0;
178 178 int readers = 0;
179 179 var stop = new ManualResetEvent(false);
180 180 int total = 0;
181 181
182 182 int itemsPerWriter = 1000;
183 183 int writersCount = 3;
184 184
185 185 for (int i = 0; i < writersCount; i++) {
186 186 Interlocked.Increment(ref writers);
187 187 var wn = i;
188 188 AsyncPool
189 189 .InvokeNewThread(() => {
190 190 for (int ii = 0; ii < itemsPerWriter; ii++) {
191 191 queue.Enqueue(1);
192 192 }
193 193 return 1;
194 194 })
195 195 .Anyway(() => Interlocked.Decrement(ref writers));
196 196 }
197 197
198 198 for (int i = 0; i < 10; i++) {
199 199 Interlocked.Increment(ref readers);
200 200 var wn = i;
201 201 AsyncPool
202 202 .InvokeNewThread(() => {
203 203 int t;
204 204 do {
205 205 while (queue.TryDequeue(out t))
206 206 Interlocked.Add(ref total, t);
207 207 } while (writers > 0);
208 208 return 1;
209 209 })
210 210 .Anyway(() => {
211 211 Interlocked.Decrement(ref readers);
212 212 if (readers == 0)
213 213 stop.Set();
214 214 });
215 215 }
216 216
217 217 stop.WaitOne();
218 218
219 219 Assert.AreEqual(itemsPerWriter * writersCount, total);
220 220 }
221 221
222 222 [TestMethod]
223 223 public void ParallelMapTest() {
224 224
225 225 int count = 100000;
226 226
227 227 double[] args = new double[count];
228 228 var rand = new Random();
229 229
230 230 for (int i = 0; i < count; i++)
231 231 args[i] = rand.NextDouble();
232 232
233 233 var t = Environment.TickCount;
234 234 var res = args.ParallelMap(x => Math.Sin(x*x), 4).Join();
235 235
236 236 Console.WriteLine("Map complete in {0} ms", Environment.TickCount - t);
237 237
238 238 t = Environment.TickCount;
239 239 for (int i = 0; i < count; i++)
240 240 Assert.AreEqual(Math.Sin(args[i] * args[i]), res[i]);
241 241 Console.WriteLine("Verified in {0} ms", Environment.TickCount - t);
242 242 }
243 243
244 244 [TestMethod]
245 245 public void ChainedMapTest() {
246 246
247 247 using (var pool = new WorkerPool(0,100,0)) {
248 248 int count = 10000;
249 249
250 250 double[] args = new double[count];
251 251 var rand = new Random();
252 252
253 253 for (int i = 0; i < count; i++)
254 254 args[i] = rand.NextDouble();
255 255
256 256 var t = Environment.TickCount;
257 257 var res = args
258 258 .ChainedMap(
259 259 x => pool.Invoke(
260 260 () => Math.Sin(x * x)
261 261 ),
262 262 4
263 263 )
264 264 .Join();
265 265
266 266 Console.WriteLine("Map complete in {0} ms", Environment.TickCount - t);
267 267
268 268 t = Environment.TickCount;
269 269 for (int i = 0; i < count; i++)
270 270 Assert.AreEqual(Math.Sin(args[i] * args[i]), res[i]);
271 271 Console.WriteLine("Verified in {0} ms", Environment.TickCount - t);
272 272 Console.WriteLine("Max workers: {0}", pool.MaxRunningThreads);
273 273 }
274 274 }
275 275
276 276 [TestMethod]
277 277 public void ParallelForEachTest() {
278 278
279 279 int count = 100000;
280 280
281 281 int[] args = new int[count];
282 282 var rand = new Random();
283 283
284 284 for (int i = 0; i < count; i++)
285 285 args[i] = (int)(rand.NextDouble() * 100);
286 286
287 287 int result = 0;
288 288
289 289 var t = Environment.TickCount;
290 290 args.ParallelForEach(x => Interlocked.Add(ref result, x), 4).Join();
291 291
292 292 Console.WriteLine("Iteration complete in {0} ms, result: {1}", Environment.TickCount - t, result);
293 293
294 294 int result2 = 0;
295 295
296 296 t = Environment.TickCount;
297 297 for (int i = 0; i < count; i++)
298 298 result2 += args[i];
299 299 Assert.AreEqual(result2, result);
300 300 Console.WriteLine("Verified in {0} ms", Environment.TickCount - t);
301 301 }
302 302
303 303 [TestMethod]
304 304 public void ComplexCase1Test() {
305 305 var flags = new bool[3];
306 306
307 307 // op1 (aync 200ms) => op2 (async 200ms) => op3 (sync map)
308 308
309 309 var p = PromiseHelper
310 310 .Sleep(200, "Alan")
311 311 .Cancelled(() => flags[0] = true)
312 312 .Chain(x =>
313 313 PromiseHelper
314 314 .Sleep(200, "Hi, " + x)
315 315 .Map(y => y)
316 316 .Cancelled(() => flags[1] = true)
317 317 )
318 318 .Cancelled(() => flags[2] = true);
319 319 Thread.Sleep(300);
320 320 p.Cancel();
321 321 try {
322 322 Assert.AreEqual(p.Join(), "Hi, Alan");
323 323 Assert.Fail("Shouldn't get here");
324 324 } catch (OperationCanceledException) {
325 325 }
326 326
327 327 Assert.IsFalse(flags[0]);
328 328 Assert.IsTrue(flags[1]);
329 329 Assert.IsTrue(flags[2]);
330 330 }
331
332 [TestMethod]
333 public void ChainedCancel1Test() {
334 // ΠΏΡ€ΠΈ ΠΎΡ‚ΠΌΠ΅Π½Π΅ сцСплСнной асинхронной ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΈ всС ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅ Π΄ΠΎΠ»ΠΆΠ½ΠΎ
335 // Π·Π°Π²Π΅Ρ€ΡˆΠ°Ρ‚ΡŒΡΡ ошибкой OperationCanceledException
336 var p = PromiseHelper
337 .Sleep(1, "Hi, HAL!")
338 .Chain(x => {
339 // запускаСм Π΄Π²Π΅ асинхронныС ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΈ
340 var result = PromiseHelper.Sleep(1000, "HEM ENABLED!!!");
341 // вторая опСрация отмСняСт ΠΏΠ΅Ρ€Π²ΡƒΡŽ Π΄ΠΎ Π·Π°Π²Π΅Ρ€ΡˆΠ΅Π½ΠΈΡ
342 PromiseHelper
343 .Sleep(100, "HAL, STOP!")
344 .Then(() => result.Cancel());
345 return result;
346 });
347 try {
348 p.Join();
349 } catch (TargetInvocationException err) {
350 Assert.IsTrue(err.InnerException is OperationCanceledException);
351 }
352 }
353
354 [TestMethod]
355 public void ChainedCancel2Test() {
356 // ΠΏΡ€ΠΈ ΠΎΡ‚ΠΌΠ΅Π½Π΅ Ρ†Π΅ΠΏΠΎΡ‡ΠΊΠΈ ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠΉ, Π²Π»ΠΎΠΆΠ΅Π½Π½Ρ‹Π΅ ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΈ Ρ‚Π°ΠΊΠΆΠ΅ Π΄ΠΎΠ»ΠΆΠ½Ρ‹ ΠΎΡ‚ΠΌΠ΅Π½ΡΡ‚ΡŒΡΡ
357 IPromiseBase p = null;
358 var pSurvive = new Promise<bool>();
359 var hemStarted = new ManualResetEvent(false);
360 p = PromiseHelper
361 .Sleep(1, "Hi, HAL!")
362 .Chain(x => {
363 hemStarted.Set();
364 // запускаСм Π΄Π²Π΅ асинхронныС ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΈ
365 var result = PromiseHelper
366 .Sleep(1000, "HEM ENABLED!!!")
367 .Then(s => pSurvive.Resolve(false));
368
369 result
370 .Cancelled(() => pSurvive.Resolve(true));
371
372 return result;
373 });
374
375 hemStarted.WaitOne();
376 p.Cancel();
377
378 try {
379 p.Join();
380 } catch (OperationCanceledException) {
381 Assert.IsTrue(pSurvive.Join());
382 }
383 }
331 384 }
332 385 }
333 386
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@@ -1,32 +1,31
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 new T Join();
12 new T Join(int timeout);
14 13
15 14 IPromise<T> Then(ResultHandler<T> success, ErrorHandler error);
16 15 IPromise<T> Then(ResultHandler<T> success, ErrorHandler<T> error);
17 16 IPromise<T> Then(ResultHandler<T> success);
18 IPromise<T> Error(ErrorHandler error);
17 new IPromise<T> Error(ErrorHandler error);
19 18 IPromise<T> Error(ErrorHandler<T> error);
20 19
21 20 IPromise<T2> Map<T2>(ResultMapper<T,T2> mapper, ErrorHandler error);
22 21 IPromise<T2> Map<T2>(ResultMapper<T, T2> mapper);
23 22
24 23 IPromise<T2> Chain<T2>(ChainedOperation<T, T2> chained, ErrorHandler error);
25 24 IPromise<T2> Chain<T2>(ChainedOperation<T, T2> chained);
26 25
27 IPromise<T> Cancelled(Action handler);
28 IPromise<T> Finally(Action handler);
29 IPromise<T> Anyway(Action handler);
26 new IPromise<T> Cancelled(Action handler);
27 new IPromise<T> Finally(Action handler);
28 new IPromise<T> Anyway(Action handler);
30 29
31 30 }
32 31 }
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@@ -1,30 +1,37
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 /// <summary>
16 16 /// Π’ΠΈΠΏ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Π°, ΠΏΠΎΠ»ΡƒΡ‡Π°Π΅ΠΌΠΎΠ³ΠΎ Ρ‡Π΅Ρ€Π΅Π· Π΄Π°Π½Π½ΠΎΠ΅ ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅.
17 17 /// </summary>
18 18 Type PromiseType { get; }
19 19
20 20 bool IsResolved { get; }
21 21
22 22 bool IsCancelled { get; }
23 23
24 24 IPromiseBase Then(Action success,ErrorHandler error);
25 25 IPromiseBase Then(Action success);
26 IPromiseBase Error(ErrorHandler error);
27 IPromiseBase Anyway(Action handler);
28 IPromiseBase Finally(Action handler);
29 IPromiseBase Cancelled(Action handler);
26 30
27 31 IPromise<T> Cast<T>();
28 32
33 void Join();
34 void Join(int timeout);
35
29 36 }
30 37 }
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@@ -1,669 +1,762
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 public delegate IPromise<TNew> ChainedOperation<in TSrc,TNew>(TSrc result);
14 public delegate IPromise<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 protected 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 readonly IPromiseBase m_parent;
90 89 readonly bool m_cancellable;
91 90
92 91 int m_childrenCount = 0;
93 92 int m_state;
94 93 T m_result;
95 94 Exception m_error;
96 95
97 96 readonly MTQueue<HandlerDescriptor> m_handlers = new MTQueue<HandlerDescriptor>();
98 97
99 98 public Promise() {
100 99 m_cancellable = true;
101 100 }
102 101
103 102 public Promise(IPromiseBase parent, bool cancellable) {
104 103 m_cancellable = cancellable;
105 m_parent = parent;
106 }
107
108 void InternalCancel() {
109 // don't try to cancel parent :)
110 Cancel(false);
104 if (parent != null)
105 AddHandler(
106 null,
107 null,
108 () => {
109 if (parent.IsExclusive)
110 parent.Cancel();
111 }
112 );
111 113 }
112 114
113 115 bool BeginTransit() {
114 116 return UnresolvedSate == Interlocked.CompareExchange(ref m_state, TransitionalState, UnresolvedSate);
115 117 }
116 118
117 119 void CompleteTransit(int state) {
118 120 if (TransitionalState != Interlocked.CompareExchange(ref m_state, state, TransitionalState))
119 121 throw new InvalidOperationException("Can't complete transition when the object isn't in the transitional state");
120 122 }
121 123
122 124 void WaitTransition() {
123 125 while (m_state == TransitionalState) {
124 126 /* noop */
125 127 }
126 128 }
127 129
128 130 public bool IsResolved {
129 131 get {
130 132 return m_state > 1;
131 133 }
132 134 }
133 135
134 136 public bool IsCancelled {
135 137 get {
136 138 return m_state == CancelledState;
137 139 }
138 140 }
139 141
140 142 public Type PromiseType {
141 143 get { return typeof(T); }
142 144 }
143 145
144 146 /// <summary>
145 147 /// ВыполняСт ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅, сообщая ΠΎΠ± ΡƒΡΠΏΠ΅ΡˆΠ½ΠΎΠΌ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΈΠΈ.
146 148 /// </summary>
147 149 /// <param name="result">Π Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ выполнСния.</param>
148 150 /// <exception cref="InvalidOperationException">Π”Π°Π½Π½ΠΎΠ΅ ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅ ΡƒΠΆΠ΅ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΎ</exception>
149 151 public void Resolve(T result) {
150 152 if (BeginTransit()) {
151 153 m_result = result;
152 154 CompleteTransit(SucceededState);
153 155 OnStateChanged();
154 156 } else {
155 157 WaitTransition();
156 158 if (m_state != CancelledState)
157 159 throw new InvalidOperationException("The promise is already resolved");
158 160 }
159 161 }
160 162
161 163 /// <summary>
164 /// ВыполняСт ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅, сообщая ΠΎΠ± ΡƒΡΠΏΠ΅ΡˆΠ½ΠΎΠΌ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΈΠΈ. Π Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ΠΎΠΌ выполнСния Π±ΡƒΠ΄Π΅Ρ‚ пустоС значСния.
165 /// </summary>
166 /// <remarks>
167 /// Π”Π°Π½Π½Ρ‹ΠΉ Π²Π°Ρ€ΠΈΠ°Π½Ρ‚ ΡƒΠ΄ΠΎΠ±Π΅Π½ Π² случаях, ΠΊΠΎΠ³Π΄Π° интСрСсСн Ρ„Π°ΠΊΡ‚ выполнСния ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΈ, Π½Π΅ΠΆΠ΅Π»ΠΈ ΠΏΠΎΠ»ΡƒΡ‡Π΅Π½Π½ΠΎΠ΅ Π·Π½Π°Ρ‡Π΅Π½ΠΈΠ΅.
168 /// </remarks>
169 public void Resolve() {
170 Resolve(default(T));
171 }
172
173 /// <summary>
162 174 /// ВыполняСт ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅, сообщая ΠΎΠ± ошибкС
163 175 /// </summary>
164 176 /// <remarks>
165 177 /// 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
166 178 /// 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΅
167 179 /// Π±ΡƒΠ΄ΡƒΡ‚ ΠΏΡ€ΠΎΠΈΠ³Π½ΠΎΡ€ΠΈΡ€ΠΎΠ²Π°Π½Ρ‹.
168 180 /// </remarks>
169 181 /// <param name="error">Π˜ΡΠΊΠ»ΡŽΡ‡Π΅Π½ΠΈΠ΅ возникшСС ΠΏΡ€ΠΈ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΈΠΈ ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΈ</param>
170 182 /// <exception cref="InvalidOperationException">Π”Π°Π½Π½ΠΎΠ΅ ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅ ΡƒΠΆΠ΅ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΎ</exception>
171 183 public void Reject(Exception error) {
172 184 if (BeginTransit()) {
173 185 m_error = error;
174 186 CompleteTransit(RejectedState);
175 187 OnStateChanged();
176 188 } else {
177 189 WaitTransition();
178 190 if (m_state == SucceededState)
179 191 throw new InvalidOperationException("The promise is already resolved");
180 192 }
181 193 }
182 194
183 195 /// <summary>
184 196 /// ΠžΡ‚ΠΌΠ΅Π½ΡΠ΅Ρ‚ ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΡŽ, Ссли это Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎ.
185 197 /// </summary>
186 198 /// <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>
187 199 public bool Cancel() {
188 return Cancel(true);
200 if (BeginTransit()) {
201 CompleteTransit(CancelledState);
202 OnStateChanged();
203 return true;
204 } else {
205 return false;
206 }
207 }
208
209 // сдСлано для Π²ΠΎΠ·Π²Ρ€Π°Ρ‰Π°Π΅ΠΌΠΎΠ³ΠΎ Ρ‚ΠΈΠΏΠ° void
210 protected void InternalCancel() {
211 Cancel();
189 212 }
190 213
191 214 /// <summary>
192 215 /// Adds new handlers to this promise.
193 216 /// </summary>
194 217 /// <param name="success">The handler of the successfully completed operation.
195 218 /// This handler will recieve an operation result as a parameter.</param>
196 219 /// <param name="error">Handles an exception that may occur during the operation.</param>
197 220 /// <returns>The new promise chained to this one.</returns>
198 221 public IPromise<T> Then(ResultHandler<T> success, ErrorHandler error) {
199 222 if (success == null && error == null)
200 223 return this;
201 224
202 225 var medium = new Promise<T>(this, true);
203 226
204 227 ResultHandler<T> resultHandler;
205 228 if (success != null)
206 229 resultHandler = x => {
207 230 success(x);
208 231 medium.Resolve(x);
209 232 };
210 233 else
211 234 resultHandler = medium.Resolve;
212 235
213 236 ErrorHandler errorHandler;
214 237 if (error != null)
215 238 errorHandler = x => {
216 239 // нСсмотря Π½Π° Ρ‚ΠΎ, Ρ‡Ρ‚ΠΎ ΠΎΠ±Ρ€Π°Π±ΠΎΡ‚Ρ‡ΠΈΠΊ ошибки вызываСтся бСзопасно,
217 240 // Ρ‚.Π΅. возникшиС Π² Π½Π΅ΠΌ ошибки Π±ΡƒΠ΄ΡƒΡ‚ ΠΏΠΎΠ΄Π°Π²Π»Π΅Π½Ρ‹, Π½Π°ΠΌ Π½ΡƒΠΆΠ½ΠΎ
218 241 // 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
219 242 try {
220 243 error(x);
221 244 } catch { }
222 245 medium.Reject(x);
223 246 };
224 247 else
225 248 errorHandler = medium.Reject;
226 249
227 250 AddHandler(resultHandler, errorHandler, medium.InternalCancel);
228 251
229 252 return medium;
230 253 }
231 254
232 public IPromiseBase Then(Action success,ErrorHandler error)
233 {
255 public IPromiseBase Then(Action success, ErrorHandler error) {
234 256 return Then(x => success(), error);
235 257 }
236 258
237 public IPromiseBase Then(Action success)
238 {
259 public IPromiseBase Then(Action success) {
239 260 return Then(x => success());
240 261 }
241 262
242 263 /// <summary>
243 264 /// Adds new handlers to this promise.
244 265 /// </summary>
245 266 /// <param name="success">The handler of the successfully completed operation.
246 267 /// This handler will recieve an operation result as a parameter.</param>
247 268 /// <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>
248 269 /// <returns>The new promise chained to this one.</returns>
249 270 public IPromise<T> Then(ResultHandler<T> success, ErrorHandler<T> error) {
250 271 if (success == null && error == null)
251 272 return this;
252 273
253 274 var medium = new Promise<T>(this, true);
254 275
255 276 ResultHandler<T> resultHandler;
256 277 ErrorHandler errorHandler;
257 278
258 279 if (success != null)
259 280 resultHandler = x => {
260 281 success(x);
261 282 medium.Resolve(x);
262 283 };
263 284 else
264 285 resultHandler = medium.Resolve;
265 286
266 287 if (error != null)
267 288 errorHandler = x => {
268 289 try {
269 290 medium.Resolve(error(x));
270 } catch(Exception e) {
291 } catch (Exception e) {
271 292 medium.Reject(e);
272 293 }
273 294 };
274 295 else
275 296 errorHandler = medium.Reject;
276 297
277 298 AddHandler(resultHandler, errorHandler, medium.InternalCancel);
278 299
279 300 return medium;
280 301 }
281 302
282 303
283 304 public IPromise<T> Then(ResultHandler<T> success) {
284 305 if (success == null)
285 306 return this;
286 307
287 308 var medium = new Promise<T>(this, true);
288 309
289 310 ResultHandler<T> resultHandler;
290 311
291 312 if (success != null)
292 313 resultHandler = x => {
293 314 success(x);
294 315 medium.Resolve(x);
295 316 };
296 317 else
297 318 resultHandler = medium.Resolve;
298 319
299 320 AddHandler(resultHandler, medium.Reject, medium.InternalCancel);
300 321
301 322 return medium;
302 323 }
303 324
304 325 public IPromise<T> Error(ErrorHandler error) {
305 326 return Then((ResultHandler<T>)null, error);
306 327 }
307 328
308 329 /// <summary>
309 330 /// Handles error and allows to keep the promise.
310 331 /// </summary>
311 332 /// <remarks>
312 333 /// If the specified handler throws an exception, this exception will be used to reject the promise.
313 334 /// </remarks>
314 335 /// <param name="handler">The error handler which returns the result of the promise.</param>
315 336 /// <returns>New promise.</returns>
316 337 public IPromise<T> Error(ErrorHandler<T> handler) {
317 338 if (handler == null)
318 339 return this;
319 340
320 341 var medium = new Promise<T>(this, true);
321 342
322 343 AddHandler(
323 344 x => medium.Resolve(x),
324 345 e => {
325 346 try {
326 347 medium.Resolve(handler(e));
327 348 } catch (Exception e2) {
328 349 medium.Reject(e2);
329 350 }
330 351 },
331 352 medium.InternalCancel
332 353 );
333 354
334 355 return medium;
335 356 }
336 357
337 358 public IPromise<T> Anyway(Action handler) {
338 359 if (handler == null)
339 360 return this;
340 361
341 var medium = new Promise<T>();
362 var medium = new Promise<T>(this,true);
342 363
343 364 AddHandler(
344 365 x => {
345 366 // to avoid handler being called multiple times we handle exception by ourselfs
346 367 try {
347 368 handler();
348 369 medium.Resolve(x);
349 370 } catch (Exception e) {
350 371 medium.Reject(e);
351 372 }
352 373 },
353 374
354 375 e => {
355 376 try {
356 377 handler();
357 378 } catch { }
358 379 medium.Reject(e);
359 380 },
360 381
361 382 medium.InternalCancel
362 383 );
363 384
364 385 return medium;
365 386 }
366 387
367 388 /// <summary>
368 389 /// 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.
369 390 /// </summary>
370 391 /// <typeparam name="TNew">Новый Ρ‚ΠΈΠΏ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Π°.</typeparam>
371 392 /// <param name="mapper">ΠŸΡ€Π΅ΠΎΠ±Ρ€Π°Π·ΠΎΠ²Π°Π½ΠΈΠ΅ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Π° ΠΊ Π½ΠΎΠ²ΠΎΠΌΡƒ Ρ‚ΠΈΠΏΡƒ.</param>
372 393 /// <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‚
373 394 /// ΠΈΡΠΊΠ»ΡŽΡ‡Π΅Π½ΠΈΠ΅ возникшСС ΠΏΡ€ΠΈ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΈΠΈ ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΈ.</param>
374 395 /// <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>
375 396 public IPromise<TNew> Map<TNew>(ResultMapper<T, TNew> mapper, ErrorHandler error) {
376 397 if (mapper == null)
377 398 throw new ArgumentNullException("mapper");
378 399
379 400 // создаСм ΠΏΡ€ΠΈΡ†Π΅ΠΏΠ»Π΅Π½Π½ΠΎΠ΅ ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅
380 var chained = new Promise<TNew>();
401 var chained = new Promise<TNew>(this,true);
381 402
382 403 ResultHandler<T> resultHandler = result => chained.Resolve(mapper(result));
383 404 ErrorHandler errorHandler = delegate(Exception e) {
384 405 if (error != null)
385 406 try {
386 407 error(e);
387 408 } catch { }
388 409 // Π² случаС ошибки Π½ΡƒΠΆΠ½ΠΎ ΠΏΠ΅Ρ€Π΅Π΄Π°Ρ‚ΡŒ ΠΈΡΠΊΠ»ΡŽΡ‡Π΅Π½ΠΈΠ΅ дальшС ΠΏΠΎ Ρ†Π΅ΠΏΠΎΡ‡ΠΊΠ΅
389 410 chained.Reject(e);
390 411 };
391 412
392 413
393 414 AddHandler(
394 415 resultHandler,
395 416 errorHandler,
396 417 chained.InternalCancel
397 418 );
398 419
399 420 return chained;
400 421 }
401 422
402 423 public IPromise<TNew> Map<TNew>(ResultMapper<T, TNew> mapper) {
403 424 return Map(mapper, null);
404 425 }
405 426
406 427 /// <summary>
407 428 /// БцСпляСт нСсколько аснхронных ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΉ. Указанная асинхронная опСрация Π±ΡƒΠ΄Π΅Ρ‚ Π²Ρ‹Π·Π²Π°Π½Π° послС
408 429 /// 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
409 430 /// Π½ΠΎΠ²ΠΎΠΉ ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΈ.
410 431 /// </summary>
411 432 /// <typeparam name="TNew">Π’ΠΈΠΏ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Π° ΡƒΠΊΠ°Π·Π°Π½Π½ΠΎΠΉ асинхронной ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΈ.</typeparam>
412 433 /// <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>
413 434 /// <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‚
414 435 /// ΠΈΡΠΊΠ»ΡŽΡ‡Π΅Π½ΠΈΠ΅ возникшСС ΠΏΡ€ΠΈ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΈΠΈ Ρ‚Π΅ΠΊΡƒΠ΅Ρ‰ΠΉ ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΈ.</param>
415 436 /// <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>
416 437 public IPromise<TNew> Chain<TNew>(ChainedOperation<T, TNew> chained, ErrorHandler error) {
417 438
418 439 // 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
419 440 // 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.
420 441 // 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‹
421 442 // 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‹.
422 443 var medium = new Promise<TNew>(this, true);
423 444
424 445 ResultHandler<T> resultHandler = delegate(T result) {
425 446 if (medium.IsCancelled)
426 447 return;
427 448
428 449 var promise = chained(result);
429 450
430 // notify chained operation that it's not needed
431 medium.Cancelled(() => promise.Cancel());
432 451 promise.Then(
433 452 x => medium.Resolve(x),
434 453 e => medium.Reject(e)
435 454 );
455
456 // notify chained operation that it's not needed anymore
457 // порядок Π²Ρ‹Π·ΠΎΠ²Π° Then, Cancelled Π²Π°ΠΆΠ΅Π½, ΠΏΠΎΡΠΊΠΎΠ»ΡŒΠΊΡƒ ΠΎΡ‚ этого
458 // зависит IsExclusive
459 medium.Cancelled(() => {
460 if(promise.IsExclusive)
461 promise.Cancel();
462 });
463
464 // внСшняя ΠΎΡ‚ΠΌΠ΅Π½Π° связанной ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΈ рассматриваСтся ΠΊΠ°ΠΊ ошибка
465 promise.Cancelled(() => medium.Reject(new OperationCanceledException()));
436 466 };
437 467
438 468 ErrorHandler errorHandler = delegate(Exception e) {
439 469 if (error != null)
440 470 error(e);
441 471 // Π² случаС ошибки Π½ΡƒΠΆΠ½ΠΎ ΠΏΠ΅Ρ€Π΅Π΄Π°Ρ‚ΡŒ ΠΈΡΠΊΠ»ΡŽΡ‡Π΅Π½ΠΈΠ΅ дальшС ΠΏΠΎ Ρ†Π΅ΠΏΠΎΡ‡ΠΊΠ΅
442 472 medium.Reject(e);
443 473 };
444 474
445 475 AddHandler(
446 476 resultHandler,
447 477 errorHandler,
448 478 medium.InternalCancel
449 479 );
450 480
451 481 return medium;
452 482 }
453 483
454 484 public IPromise<TNew> Chain<TNew>(ChainedOperation<T, TNew> chained) {
455 485 return Chain(chained, null);
456 486 }
457 487
458 488 public IPromise<T> Cancelled(Action handler) {
459 489 AddHandler(null, null, handler);
460 490 return this;
461 491 }
462 492
463 493 /// <summary>
464 494 /// Adds the specified handler for all cases (success, error, cancel)
465 495 /// </summary>
466 496 /// <param name="handler">The handler that will be called anyway</param>
467 497 /// <returns>self</returns>
468 498 public IPromise<T> Finally(Action handler) {
469 499 if (handler == null)
470 500 throw new ArgumentNullException("handler");
471 501 AddHandler(
472 502 x => handler(),
473 503 e => handler(),
474 504 handler
475 505 );
476 506 return this;
477 507 }
478 508
479 509 /// <summary>
480 510 /// ΠŸΡ€Π΅ΠΎΠ±Ρ€Π°Π·ΡƒΠ΅Ρ‚ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ обСщания ΠΊ Π½ΡƒΠΆΠ½ΠΎΠΌΡƒ Ρ‚ΠΈΠΏΡƒ
481 511 /// </summary>
482 512 /// <typeparam name="T2"></typeparam>
483 513 /// <returns></returns>
484 514 public IPromise<T2> Cast<T2>() {
485 515 return Map(x => (T2)(object)x, null);
486 516 }
487 517
488 518 /// <summary>
489 519 /// ДоТидаСтся ΠΎΡ‚Π»ΠΎΠΆΠ΅Π½Π½ΠΎΠ³ΠΎ обСщания ΠΈ Π² случаС успСха, Π²ΠΎΠ·Π²Ρ€Π°Ρ‰Π°Π΅Ρ‚
490 520 /// Π΅Π³ΠΎ, Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚, Π² ΠΏΡ€ΠΎΡ‚ΠΈΠ²Π½ΠΎΠΌ случаС бросаСт ΠΈΡΠΊΠ»ΡŽΡ‡Π΅Π½ΠΈΠ΅.
491 521 /// </summary>
492 522 /// <remarks>
493 523 /// <para>
494 524 /// 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‚,
495 525 /// 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
496 526 /// ΠΎΠ·Π½Π°Ρ‡Π°Π΅Ρ‚, Ρ‡Ρ‚ΠΎ ΠΌΡ‹ Π΅Π³ΠΎ Π½Π΅ доТдались, ΠΎΠ΄Π½Π°ΠΊΠΎ всС зарСгистрированныС
497 527 /// 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°
498 528 /// ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅ Π±ΡƒΠ΄Π΅Ρ‚ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΎ.
499 529 /// </para>
500 530 /// <para>
501 531 /// 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
502 532 /// 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
503 533 /// 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
504 534 /// ΠΎΡ‚ΠΊΠ»ΠΎΠ½Π΅Π½ΠΈΠ΅ ΠΌΠΎΠΆΠ΅Ρ‚ привСсти ΠΊ Π½Π΅ΠΏΡ€ΠΎΠ³Π½ΠΎΠ·ΠΈΡ€ΡƒΠ΅ΠΌΠΎΠΌΡƒ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρƒ.
505 535 /// </para>
506 536 /// </remarks>
507 537 /// <param name="timeout">ВрСмя оТидания</param>
508 538 /// <returns>Π Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ выполнСния обСщания</returns>
509 539 public T Join(int timeout) {
510 540 var evt = new ManualResetEvent(false);
511 541 Anyway(() => evt.Set());
512 542 Cancelled(() => evt.Set());
513 543
514 544 if (!evt.WaitOne(timeout, true))
515 545 throw new TimeoutException();
516 546
517 547 switch (m_state) {
518 548 case SucceededState:
519 549 return m_result;
520 550 case CancelledState:
521 551 throw new OperationCanceledException();
522 552 case RejectedState:
523 553 throw new TargetInvocationException(m_error);
524 554 default:
525 555 throw new ApplicationException(String.Format("Invalid promise state {0}", m_state));
526 556 }
527 557 }
528 558
529 559 public T Join() {
530 560 return Join(Timeout.Infinite);
531 561 }
532 562
533 563 void AddHandler(ResultHandler<T> success, ErrorHandler error, Action cancel) {
534 Interlocked.Increment(ref m_childrenCount);
564 if (success != null || error != null)
565 Interlocked.Increment(ref m_childrenCount);
535 566
536 567 HandlerDescriptor handler = new HandlerDescriptor {
537 568 resultHandler = success,
538 569 errorHandler = error,
539 570 cancellHandler = cancel
540 571 };
541 572
542 573 bool queued;
543 574
544 575 if (!IsResolved) {
545 576 m_handlers.Enqueue(handler);
546 577 queued = true;
547 578 } else {
548 579 // the promise is in resolved state, just invoke the handled with minimum overhead
549 580 queued = false;
550 581 InvokeHandler(handler);
551 582 }
552 583
553 584 if (queued && IsResolved && m_handlers.TryDequeue(out handler))
554 585 // if the promise have been resolved while we was adding handler to the queue
555 586 // we can't guarantee that someone is still processing it
556 587 // therefore we will fetch a handler from the queue and execute it
557 588 // note that fetched handler may be not the one that we have added
558 589 // even we can fetch no handlers at all :)
559 590 InvokeHandler(handler);
560 591 }
561 592
562 593 protected virtual void InvokeHandler(HandlerDescriptor handler) {
563 594 switch (m_state) {
564 595 case SucceededState:
565 596 handler.Resolve(m_result);
566 597 break;
567 598 case RejectedState:
568 599 handler.Reject(m_error);
569 600 break;
570 601 case CancelledState:
571 602 handler.Cancel();
572 603 break;
573 604 default:
574 605 // do nothing
575 606 return;
576 607 }
577 608 }
578 609
579 610 protected virtual void OnStateChanged() {
580 611 HandlerDescriptor handler;
581 612 while (m_handlers.TryDequeue(out handler))
582 613 InvokeHandler(handler);
583 614 }
584 615
585 616 public bool IsExclusive {
586 617 get {
587 618 return m_childrenCount <= 1;
588 619 }
589 620 }
590 621
591 protected bool Cancel(bool dependencies) {
592 if (BeginTransit()) {
593 CompleteTransit(CancelledState);
594 OnStateChanged();
595
596 if (dependencies && m_parent != null && m_parent.IsExclusive)
597 m_parent.Cancel();
598
599 return true;
600 } else {
601 return false;
602 }
603 }
604
605 622 /// <summary>
606 623 /// 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.
607 624 /// 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.
608 625 /// 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.
609 626 /// </summary>
610 627 /// <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>
611 628 /// <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>
612 629 /// <exception cref="ArgumentNullException"><paramref name="promises"/> Π½Π΅ ΠΌΠΎΠΆΠ΅Ρ‚ Π±Ρ‹Ρ‚ΡŒ null</exception>
613 630 public static IPromise<T[]> CreateComposite(IList<IPromise<T>> promises) {
614 631 if (promises == null)
615 632 throw new ArgumentNullException();
616 633
617 634 // 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΅
618 635 var result = new T[promises.Count];
619 636 var promise = new Promise<T[]>();
620 637
621 638 // special case
622 639 if (promises.Count == 0) {
623 640 promise.Resolve(result);
624 641 return promise;
625 642 }
626 643
627 644 int pending = promises.Count;
628 645
629 646 for (int i = 0; i < promises.Count; i++) {
630 647 var dest = i;
631 648
632 promises[i].Then(
633 x => {
634 result[dest] = x;
635 if(Interlocked.Decrement(ref pending) == 0)
636 promise.Resolve(result);
637 },
638 e => promise.Reject(e)
639 );
649 if (promises[i] != null) {
650 promises[i].Then(
651 x => {
652 result[dest] = x;
653 if (Interlocked.Decrement(ref pending) == 0)
654 promise.Resolve(result);
655 },
656 e => promise.Reject(e)
657 );
658 } else {
659 if (Interlocked.Decrement(ref pending) == 0)
660 promise.Resolve(result);
661 }
640 662 }
641 663
642 664 promise.Cancelled(
643 665 () => {
644 foreach(var d in promises)
645 if(d.IsExclusive)
666 foreach (var d in promises)
667 if (d != null && d.IsExclusive)
646 668 d.Cancel();
647 669 }
648 670 );
649 671
650 672 return promise;
651 673 }
652 674
675 /// <summary>
676 /// ΠžΠ±ΡŠΠ΅Π΄ΠΈΠ½ΡΠ΅Ρ‚ нСсколько ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠΉ Π² ΠΎΠ΄Π½ΠΎ. Π Π΅Π·ΡƒΠ»ΡŒΡ‚ΠΈΡ€ΡƒΡŽΡ‰Π΅Π΅ ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅ Π±ΡƒΠ΄Π΅Ρ‚ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΎ ΠΏΡ€ΠΈ
677 /// Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½ΠΈΠΈ всСх ΡƒΠΊΠ°Π·Π°Π½Π½Ρ‹Ρ… ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠΉ. ΠŸΡ€ΠΈ этом Π²ΠΎΠ·Π²Ρ€Π°Ρ‰Π°Π΅ΠΌΡ‹Π΅ значСния ΠΏΠ΅Ρ€Π²ΠΈΡ‡Π½Ρ‹Ρ… ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠΉ
678 /// ΠΈΠ³Π½ΠΎΡ€ΠΈΡ€ΡƒΡŽΡ‚ΡΡ.
679 /// </summary>
680 /// <param name="promises">ΠšΠΎΠ»Π»Π΅ΠΊΡ†ΠΈΡ ΠΏΠ΅Ρ€Π²ΠΈΡ‡Π½Ρ‹Ρ… ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠΉ, ΠΊΠΎΡ‚ΠΎΡ€Ρ‹Π΅ Π±ΡƒΠ΄ΡƒΡ‚ ΠΎΠ±ΡŠΠ΅Π΄Π΅Π½Π΅Π½Ρ‹ Π² ΠΎΠ΄Π½ΠΎ.</param>
681 /// <returns>НовоС ΠΎΠ±Π΅Ρ‰Π°Π½ΠΈΠ΅, ΠΎΠ±ΡŠΠ΅Π΄ΠΈΠ½ΡΡŽΡ‰Π΅Π΅ Π² сСбС ΠΏΠ΅Ρ€Π΅Π΄Π°Π½Π½Ρ‹Π΅.</returns>
682 /// <remarks>
683 /// Если Π² ΠΊΠΎΠ»Π»Π΅ΠΊΡ†ΠΈΠΈ Π²ΡΡ‚Ρ€Π΅Ρ‡Π°ΡŽΡŒΡΡ <c>null</c>, Ρ‚ΠΎ ΠΎΠ½ΠΈ Π²ΠΎΡΠΏΡ€ΠΈΠ½ΠΈΠΌΠ°ΡŽΡ‚ΡΡ ΠΊΠ°ΠΊ Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½Π½Ρ‹Π΅ обСщания.
684 /// </remarks>
685 public static IPromiseBase CreateComposite(ICollection<IPromiseBase> promises) {
686 if (promises == null)
687 throw new ArgumentNullException();
688 if (promises.Count == 0)
689 return Promise<object>.ResultToPromise(null);
690
691 int countdown = promises.Count;
692
693 var result = new Promise<object>();
694
695 foreach (var d in promises) {
696 if (d == null) {
697 if (Interlocked.Decrement(ref countdown) == 0)
698 result.Resolve(null);
699 } else {
700 d.Then(() => {
701 if (Interlocked.Decrement(ref countdown) == 0)
702 result.Resolve(null);
703 });
704 }
705 }
706
707 result.Cancelled(() => {
708 foreach (var d in promises)
709 if (d != null && d.IsExclusive)
710 d.Cancel();
711 });
712
713 return result;
714 }
715
653 716 public static Promise<T> ResultToPromise(T result) {
654 717 var p = new Promise<T>();
655 718 p.Resolve(result);
656 719 return p;
657 720 }
658 721
659 722 public static Promise<T> ExceptionToPromise(Exception error) {
660 723 if (error == null)
661 724 throw new ArgumentNullException();
662 725
663 726 var p = new Promise<T>();
664 727 p.Reject(error);
665 728 return p;
666 729 }
667 730
731 #region IPromiseBase explicit implementation
732
733 IPromiseBase IPromiseBase.Error(ErrorHandler error) {
734 return Error(error);
735 }
736
737 IPromiseBase IPromiseBase.Anyway(Action handler) {
738 return Anyway(handler);
739 }
740
741 IPromiseBase IPromiseBase.Finally(Action handler) {
742 return Finally(handler);
743 }
744
745 IPromiseBase IPromiseBase.Cancelled(Action handler) {
746 return Cancelled(handler);
747 }
748
749 void IPromiseBase.Join() {
750 Join();
751 }
752
753 void IPromiseBase.Join(int timeout) {
754 Join(timeout);
755 }
756
757 #endregion
758
759
760
668 761 }
669 762 }
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