{"id":367857,"date":"2024-05-21T03:30:06","date_gmt":"2024-05-21T03:30:06","guid":{"rendered":"http:\/\/savepearlharbor.com\/?p=367857"},"modified":"-0001-11-30T00:00:00","modified_gmt":"2024-05-21T03:30:06","slug":"","status":"publish","type":"post","link":"https:\/\/savepearlharbor.com\/?p=367857","title":{"rendered":"<span>\u041a\u0430\u043a \u043b\u0435\u0433\u043a\u043e \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c deadlock \u043d\u0430 Task.WhenAll<\/span>"},"content":{"rendered":"<div><!--[--><!--]--><\/div>\n<div id=\"post-content-body\">\n<div>\n<div class=\"article-formatted-body article-formatted-body article-formatted-body_version-2\">\n<div xmlns=\"http:\/\/www.w3.org\/1999\/xhtml\">\n<p>\u041d\u0430\u043f\u043e\u043c\u0438\u043d\u0430\u043d\u0438\u0435! Task.WhenAll \u043d\u0435 \u043e\u0442\u0434\u0430\u0435\u0442 \u0432\u0430\u0448\u0438 \u0437\u0430\u0434\u0430\u0447\u0438 \u043f\u043b\u0430\u043d\u0438\u0440\u043e\u0432\u0449\u0438\u043a\u0443 \u0438 \u0435\u0441\u043b\u0438 \u0432\u044b \u0437\u0430\u0431\u044b\u043b\u0438 Task.Run \u0438\u043b\u0438 Task.Factory.StartNew, \u0442\u043e \u0434\u043e\u0431\u0440\u043e \u043f\u043e\u0436\u0430\u043b\u043e\u0432\u0430\u0442\u044c \u043d\u0430 \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u043e\u0435 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0438\\\u0438\u043b\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0432 main \u0438\\\u0438\u043b\u0438 \u043b\u043e\u0432\u0438\u0442\u0435 deadlock.<br \/>\u0410 \u043d\u0438\u0436\u0435 \u043f\u0430\u0440\u0430 \u043f\u0440\u0438\u043c\u0435\u0440\u043e\u0432, \u043f\u0440\u0438 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0432\u044b \u043c\u043e\u0436\u0435\u0442\u0435 \u044d\u0442\u043e\u0433\u043e \u0438\u0437\u0431\u0435\u0436\u0430\u0442\u044c, \u043d\u043e \u0442\u0430\u043a \u0434\u0435\u043b\u0430\u0442\u044c \u043d\u0435 \u043d\u0430\u0434\u043e.<\/p>\n<p>\u043a\u043e\u0434 \u0446\u0435\u043b\u0438\u043a\u043e\u043c<br \/><a href=\"https:\/\/gist.github.com\/eternityowo\/3579e84cf690085271b00af04701aefb\" rel=\"noopener noreferrer nofollow\">Deadlock and Task.WhenAll. Don&#8217;t forget to use Task.Run or Task,Factory.StartNew (github.com)<\/a>  <\/p>\n<h2>\u0421\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u043c\u0441\u044f \u0432 main<\/h2>\n<p>\u041a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0438\u0440\u0443\u0435\u043c\u044b\u0439 \u043c\u0435\u0442\u043e\u0434, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043f\u043e\u043c\u043e\u0436\u0435\u0442 \u043d\u0430\u043c \u043f\u0440\u043e\u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u0440\u0430\u0437\u043d\u044b\u0445 \u0441\u0438\u0442\u0443\u0430\u0446\u0438\u0439<\/p>\n<pre><code class=\"cs\">async Task&lt;int> MethodAsync(int taskId, int sleepMs, int delayMs = 0, bool safeCtx = true, bool yield = false) {     var taskIdStr = $\"tid: {taskId,2}, \";        var taskInfo = $\"sleep: {sleepMs}, delay: {delayMs}, safeCtx: {safeCtx,5}, yield: {yield}\";      PrintPid(true, Scope.Task, taskIdStr + taskInfo);      if (yield)     {         await Task.Yield();     }     else     {         await Task.Delay(delayMs).ConfigureAwait(safeCtx);     }      Thread.Sleep(sleepMs);      PrintPid(false, Scope.Task, taskIdStr);      return (int)Math.Sqrt(sleepMs); }<\/code><\/pre>\n<h3>\u041e\u0431\u0435 \u0442\u0430\u0441\u043a\u0438 \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u043e<\/h3>\n<pre><code class=\"cs\">async Task TestSync() {     var task0 = MethodAsync(0, 1000);     var task1 = MethodAsync(1, 2000);     await Task.WhenAll(task0, task1); }<\/code><\/pre>\n<pre><code class=\"cs\">in  (Main) pid:  4.     in  (Test) pid:  4. TestSync         in  (Task) pid:  4. tid:  0, sleep: 1000, delay: 0, safeCtx:  True, yield: False         out (Task) pid:  4. tid:  0,         in  (Task) pid:  4. tid:  1, sleep: 2000, delay: 0, safeCtx:  True, yield: False         out (Task) pid:  4. tid:  1,     out (Test) pid:  4.     total sleep: 3,007 ms out (Main) pid:  4.<\/code><\/pre>\n<h3>\u041e\u0431\u0435 \u0442\u0430\u0441\u043a\u0438 \u043d\u0430 \u043f\u0443\u043b\u0435<\/h3>\n<p>\u041f\u0435\u0440\u0432\u0430\u044f \u0443\u0448\u043b\u0430 Delay, \u0432\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u0441\u043b\u0435 Yield. \u041d\u043e \u0442\u0430\u043a \u0434\u0435\u043b\u0430\u0442\u044c \u043d\u0435 \u043d\u0430\u0434\u043e!<\/p>\n<pre><code class=\"cs\">async Task TestDelayAndYield() {     var task0 = MethodAsync(0, 1000, 10);     var task1 = MethodAsync(1, 2000, yield: true);     await Task.WhenAll(task0, task1); }<\/code><\/pre>\n<pre><code class=\"cs\">in  (Main) pid:  8.     in  (Test) pid:  8. TestDelayAndYield         in  (Task) pid:  8. tid:  0, sleep: 1000, delay: 10, safeCtx:  True, yield: False         in  (Task) pid:  8. tid:  1, sleep: 2000, delay:  0, safeCtx:  True, yield: True         out (Task) pid:  0. tid:  0,         out (Task) pid: 10. tid:  1,     out (Test) pid: 10.     total sleep: 2,014 ms out (Main) pid: 1<\/code><\/pre>\n<h3>\u041e\u0434\u043d\u0430 \u043d\u0430 \u043f\u0443\u043b\u0435, \u0434\u0440\u0443\u0433\u0430\u044f \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u043e<\/h3>\n<p>\u041f\u0435\u0440\u0432\u0430\u044f \u0443\u0448\u043b\u0430 \u043f\u043e\u0441\u043b\u0435 \u043e\u0447\u0435\u043d\u044c \u043a\u043e\u0440\u043e\u0442\u043a\u043e\u0433\u043e Delay, \u0432\u0442\u043e\u0440\u0430\u044f \u043f\u0440\u0438 0 Delay \u0438 ConfigureAwait(false) \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u043b\u0430\u0441\u044c \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u043e. \u0418 \u0442\u0430\u043a \u0434\u0435\u043b\u0430\u0442\u044c \u0442\u043e\u0436\u0435 \u043d\u0435 \u043d\u0430\u0434\u043e!<\/p>\n<pre><code class=\"cs\">async Task TestSmallDelayAndConfigureAwaitForZero() {     var task0 = MethodAsync(0, 1000, 1);     var task1 = MethodAsync(1, 2000, 0, safeCtx: false);     await Task.WhenAll(task0, task1); }<\/code><\/pre>\n<pre><code class=\"cs\">in  (Main) pid:  4.     in  (Test) pid:  4. TestSmallDelayAndConfigureAwaitForZero         in  (Task) pid:  4. tid:  0, sleep: 1000, delay: 1, safeCtx:  True, yield: False         in  (Task) pid:  4. tid:  1, sleep: 2000, delay: 0, safeCtx: False, yield: False         out (Task) pid: 15. tid:  0,         out (Task) pid:  4. tid:  1,     out (Test) pid:  4.     total sleep: 2,019 ms out (Main) pid:  4<\/code><\/pre>\n<h3>Use the Task.Run, Luke!<\/h3>\n<pre><code class=\"cs\">async Task TestTaskRun() {     var task0 = Task.Run(() => MethodAsync(0, 1000));     var task1 = Task.Factory.StartNew(() => MethodAsync(1, 2000));     await Task.WhenAll(task0, task1); }<\/code><\/pre>\n<pre><code class=\"cs\">in  (Main) pid:  4.     in  (Test) pid:  4. TestTaskRun         in  (Task) pid:  5. tid:  0, sleep: 1000, delay: 0, safeCtx:  True, yield: False         in  (Task) pid:  0. tid:  1, sleep: 2000, delay: 0, safeCtx:  True, yield: False         out (Task) pid:  5. tid:  0,         out (Task) pid:  0. tid:  1,     out (Test) pid:  0.     total sleep: 2,016 ms out (Main) pid:  0.<\/code><\/pre>\n<p>\u0412\u0441\u0435\u0433\u0434\u0430 \u0437\u0430\u043f\u0443\u0441\u043a\u0430\u0439\u0442\u0435 \u0441\u0432\u043e\u0438 \u0442\u0430\u0441\u043a\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044f Task.Run \u0438\u043b\u0438 Task.Factory.StartNew. <br \/>\u0415\u0441\u0442\u044c \u0435\u0449\u0435, \u043a\u043e\u043d\u0435\u0447\u043d\u043e, \u0432\u0430\u0440\u0438\u0430\u043d\u0442 \u0441 Task.Start(), \u043d\u043e \u0432\u0435\u0440\u0445\u043d\u0438\u0435 \u0434\u0432\u0430 \u043a\u0443\u0434\u0430 \u0431\u043e\u043b\u0435\u0435 \u0443\u0434\u043e\u0431\u043d\u044b\u0435 \u0438 \u0433\u0438\u0431\u043a\u0438\u0435.<\/p>\n<p>\u0418\u0437 \u0437\u0430\u043f\u0443\u0441\u043a\u043e\u0432 \u0432\u0438\u0434\u043d\u043e, out pid main \u0438\u043d\u043e\u0433\u0434\u0430  \u043e\u0442\u043b\u0438\u0447\u0430\u0435\u0442\u0441\u044f \u043e\u0442 in pid main, \u0442\u043e \u0435\u0441\u0442\u044c \u0432 \u0441\u043b\u043e\u0436\u043d\u044b\u0445 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f\u0445, \u0432\u0435\u0440\u043e\u044f\u0442\u043d\u043e\u0441\u0442\u044c \u0437\u0430\u043f\u0443\u0441\u0442\u0438\u0442\u044c\u0441\u044f \u043d\u0430 main \u043d\u0438\u0436\u0435, \u043d\u043e \u044d\u0442\u043e \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u043e.<\/p>\n<h2>\u0410 \u0442\u0435\u043f\u0435\u0440\u044c \u043b\u043e\u0432\u0438\u043c deadlock<\/h2>\n<figure class=\"\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/habrastorage.org\/r\/w780q1\/getpro\/habr\/upload_files\/04a\/6dc\/f0e\/04a6dcf0ec74aa42442c01c6fb69edee.jpg\" alt=\"Thread'\u044b \u0432\u044b\u044f\u0441\u043d\u044f\u044e\u0442, \u043a\u0442\u043e \u043b\u043e\u043a\u043d\u0443\u043b \u0440\u0435\u0441\u0443\u0440\u0441\u044b\" title=\"Thread'\u044b \u0432\u044b\u044f\u0441\u043d\u044f\u044e\u0442, \u043a\u0442\u043e \u043b\u043e\u043a\u043d\u0443\u043b \u0440\u0435\u0441\u0443\u0440\u0441\u044b\" width=\"500\" height=\"408\" data-src=\"https:\/\/habrastorage.org\/getpro\/habr\/upload_files\/04a\/6dc\/f0e\/04a6dcf0ec74aa42442c01c6fb69edee.jpg\" data-blurred=\"true\"\/><\/p>\n<div><figcaption>Thread&#8217;\u044b \u0432\u044b\u044f\u0441\u043d\u044f\u044e\u0442, \u043a\u0442\u043e \u043b\u043e\u043a\u043d\u0443\u043b \u0440\u0435\u0441\u0443\u0440\u0441\u044b<\/figcaption><\/div>\n<\/figure>\n<p>\u041f\u0438\u0448\u0435\u043c \u043a\u0430\u043a\u043e\u0439-\u0442\u043e producer-consumer \u0441 async\\await \u0432\u043d\u0443\u0442\u0440\u0438, \u0434\u0430\u0436\u0435 \u0434\u043e\u0431\u0430\u0432\u0438\u043b\u0438 CancelationToken&#8217;\u044b \u0438 TaskCreationOptions, \u043d\u043e \u0437\u0430\u0431\u044b\u043b\u0438 Task.Run.<\/p>\n<p>\u041b\u043e\u0432\u0438\u043c deadlock \u0438 \u0443\u0436\u0435 \u043d\u0438\u0447\u0435\u0433\u043e \u043d\u0430\u043c \u043d\u0435 \u043f\u043e\u043c\u043e\u0436\u0435\u0442, \u0432\u043a\u043b\u044e\u0447\u0430\u044f timeout;<\/p>\n<pre><code class=\"cs\">async Task TestDeadlock() {     var source = new CancellationTokenSource(TimeSpan.FromSeconds(5));     var channel = Channel.CreateBounded&lt;int>(100);      var writeTask = new Task(async () => \/\/ Task.Run(async () =>     {         try         {             foreach (var i in Enumerable.Range(0, 10000))             {                 await channel.Writer.WriteAsync(i, source.Token);             }         }         catch (Exception ex)         {             Console.WriteLine(\"U think u can exit by timeout? But u got lock on main thread\");         }         finally         {             channel.Writer.TryComplete();         }     }, TaskCreationOptions.PreferFairness | TaskCreationOptions.LongRunning);      var readTask = new Task(async () => \/\/ Task.Run(async () =>     {         try         {             var sum = 0;             Console.Write(\"calc sum\");             while (await channel.Reader.WaitToReadAsync(source.Token))             {                 var i = await channel.Reader.ReadAsync(source.Token);                 sum += i;                 Console.Write(new string('.', (i % 3)+1).PadRight(3));                 Console.SetCursorPosition(Console.CursorLeft - 3, Console.CursorTop);             }             Console.WriteLine();             Console.WriteLine($\"sum: {sum}\");         }         catch (Exception ex)         {             Console.WriteLine(\"U think u can exit by timeout? But u got lock on main thread\");         }     }, TaskCreationOptions.PreferFairness | TaskCreationOptions.LongRunning);      await Task.WhenAll(writeTask, readTask); }<\/code><\/pre>\n<p>\u042d\u0442\u043e\u0442 \u043f\u0440\u0438\u043c\u0435\u0440 \u043f\u043e\u043a\u0430\u0437\u044b\u0432\u0430\u0435\u0442, \u0447\u0442\u043e \u0434\u0432\u0430 \u0442\u0435\u0441\u0442\u0430 \u0432\u044b\u0448\u0435 <strong>TestDelayAndYield<\/strong> \u0438 <strong>TestSmallDelayAndConfigureAwaitForZero <\/strong>\u043d\u0435 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u043e \u043f\u043e\u0441\u043b\u0435 await \u0443\u0439\u0434\u0443\u0442 \u0432 \u043f\u0443\u043b \u0438 \u043f\u043e\u043b\u0430\u0433\u0430\u0442\u044c\u0441\u044f \u043d\u0430 \u044d\u0442\u043e \u043f\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u0435 \u043d\u0435 \u0441\u0442\u043e\u0438\u0442.<\/p>\n<p>\u041d\u0435 \u0440\u0430\u0441\u0441\u0447\u0438\u0442\u044b\u0432\u0430\u0439\u0442\u0435 \u043d\u0430 undefined behavior \u0438 \u0432\u0441\u0435\u0433\u0434\u0430 \u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u043e \u0437\u0430\u043f\u0443\u0441\u043a\u0430\u0439\u0442\u0435 \u0441\u0432\u043e\u0438 \u0442\u0430\u0441\u043a\u0438.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<p><!----><!----><\/div>\n<p><!----><!----><br \/> \u0441\u0441\u044b\u043b\u043a\u0430 \u043d\u0430 \u043e\u0440\u0438\u0433\u0438\u043d\u0430\u043b \u0441\u0442\u0430\u0442\u044c\u0438 <a href=\"https:\/\/habr.com\/ru\/articles\/792788\/\"> https:\/\/habr.com\/ru\/articles\/792788\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<div><!--[--><!--]--><\/div>\n<div id=\"post-content-body\">\n<div>\n<div class=\"article-formatted-body article-formatted-body article-formatted-body_version-2\">\n<div xmlns=\"http:\/\/www.w3.org\/1999\/xhtml\">\n<p>\u041d\u0430\u043f\u043e\u043c\u0438\u043d\u0430\u043d\u0438\u0435! Task.WhenAll \u043d\u0435 \u043e\u0442\u0434\u0430\u0435\u0442 \u0432\u0430\u0448\u0438 \u0437\u0430\u0434\u0430\u0447\u0438 \u043f\u043b\u0430\u043d\u0438\u0440\u043e\u0432\u0449\u0438\u043a\u0443 \u0438 \u0435\u0441\u043b\u0438 \u0432\u044b \u0437\u0430\u0431\u044b\u043b\u0438 Task.Run \u0438\u043b\u0438 Task.Factory.StartNew, \u0442\u043e \u0434\u043e\u0431\u0440\u043e \u043f\u043e\u0436\u0430\u043b\u043e\u0432\u0430\u0442\u044c \u043d\u0430 \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u043e\u0435 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0438\\\u0438\u043b\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0432 main \u0438\\\u0438\u043b\u0438 \u043b\u043e\u0432\u0438\u0442\u0435 deadlock.<br \/>\u0410 \u043d\u0438\u0436\u0435 \u043f\u0430\u0440\u0430 \u043f\u0440\u0438\u043c\u0435\u0440\u043e\u0432, \u043f\u0440\u0438 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0432\u044b \u043c\u043e\u0436\u0435\u0442\u0435 \u044d\u0442\u043e\u0433\u043e \u0438\u0437\u0431\u0435\u0436\u0430\u0442\u044c, \u043d\u043e \u0442\u0430\u043a \u0434\u0435\u043b\u0430\u0442\u044c \u043d\u0435 \u043d\u0430\u0434\u043e.<\/p>\n<p>\u043a\u043e\u0434 \u0446\u0435\u043b\u0438\u043a\u043e\u043c<br \/><a href=\"https:\/\/gist.github.com\/eternityowo\/3579e84cf690085271b00af04701aefb\" rel=\"noopener noreferrer nofollow\">Deadlock and Task.WhenAll. Don&#8217;t forget to use Task.Run or Task,Factory.StartNew (github.com)<\/a>  <\/p>\n<h2>\u0421\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u043c\u0441\u044f \u0432 main<\/h2>\n<p>\u041a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0438\u0440\u0443\u0435\u043c\u044b\u0439 \u043c\u0435\u0442\u043e\u0434, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043f\u043e\u043c\u043e\u0436\u0435\u0442 \u043d\u0430\u043c \u043f\u0440\u043e\u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u0440\u0430\u0437\u043d\u044b\u0445 \u0441\u0438\u0442\u0443\u0430\u0446\u0438\u0439<\/p>\n<pre><code class=\"cs\">async Task&lt;int> MethodAsync(int taskId, int sleepMs, int delayMs = 0, bool safeCtx = true, bool yield = false) {     var taskIdStr = $\"tid: {taskId,2}, \";        var taskInfo = $\"sleep: {sleepMs}, delay: {delayMs}, safeCtx: {safeCtx,5}, yield: {yield}\";      PrintPid(true, Scope.Task, taskIdStr + taskInfo);      if (yield)     {         await Task.Yield();     }     else     {         await Task.Delay(delayMs).ConfigureAwait(safeCtx);     }      Thread.Sleep(sleepMs);      PrintPid(false, Scope.Task, taskIdStr);      return (int)Math.Sqrt(sleepMs); }<\/code><\/pre>\n<h3>\u041e\u0431\u0435 \u0442\u0430\u0441\u043a\u0438 \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u043e<\/h3>\n<pre><code class=\"cs\">async Task TestSync() {     var task0 = MethodAsync(0, 1000);     var task1 = MethodAsync(1, 2000);     await Task.WhenAll(task0, task1); }<\/code><\/pre>\n<pre><code class=\"cs\">in  (Main) pid:  4.     in  (Test) pid:  4. TestSync         in  (Task) pid:  4. tid:  0, sleep: 1000, delay: 0, safeCtx:  True, yield: False         out (Task) pid:  4. tid:  0,         in  (Task) pid:  4. tid:  1, sleep: 2000, delay: 0, safeCtx:  True, yield: False         out (Task) pid:  4. tid:  1,     out (Test) pid:  4.     total sleep: 3,007 ms out (Main) pid:  4.<\/code><\/pre>\n<h3>\u041e\u0431\u0435 \u0442\u0430\u0441\u043a\u0438 \u043d\u0430 \u043f\u0443\u043b\u0435<\/h3>\n<p>\u041f\u0435\u0440\u0432\u0430\u044f \u0443\u0448\u043b\u0430 Delay, \u0432\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u0441\u043b\u0435 Yield. \u041d\u043e \u0442\u0430\u043a \u0434\u0435\u043b\u0430\u0442\u044c \u043d\u0435 \u043d\u0430\u0434\u043e!<\/p>\n<pre><code class=\"cs\">async Task TestDelayAndYield() {     var task0 = MethodAsync(0, 1000, 10);     var task1 = MethodAsync(1, 2000, yield: true);     await Task.WhenAll(task0, task1); }<\/code><\/pre>\n<pre><code class=\"cs\">in  (Main) pid:  8.     in  (Test) pid:  8. TestDelayAndYield         in  (Task) pid:  8. tid:  0, sleep: 1000, delay: 10, safeCtx:  True, yield: False         in  (Task) pid:  8. tid:  1, sleep: 2000, delay:  0, safeCtx:  True, yield: True         out (Task) pid:  0. tid:  0,         out (Task) pid: 10. tid:  1,     out (Test) pid: 10.     total sleep: 2,014 ms out (Main) pid: 1<\/code><\/pre>\n<h3>\u041e\u0434\u043d\u0430 \u043d\u0430 \u043f\u0443\u043b\u0435, \u0434\u0440\u0443\u0433\u0430\u044f \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u043e<\/h3>\n<p>\u041f\u0435\u0440\u0432\u0430\u044f \u0443\u0448\u043b\u0430 \u043f\u043e\u0441\u043b\u0435 \u043e\u0447\u0435\u043d\u044c \u043a\u043e\u0440\u043e\u0442\u043a\u043e\u0433\u043e Delay, \u0432\u0442\u043e\u0440\u0430\u044f \u043f\u0440\u0438 0 Delay \u0438 ConfigureAwait(false) \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u043b\u0430\u0441\u044c \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u043e. \u0418 \u0442\u0430\u043a \u0434\u0435\u043b\u0430\u0442\u044c \u0442\u043e\u0436\u0435 \u043d\u0435 \u043d\u0430\u0434\u043e!<\/p>\n<pre><code class=\"cs\">async Task TestSmallDelayAndConfigureAwaitForZero() {     var task0 = MethodAsync(0, 1000, 1);     var task1 = MethodAsync(1, 2000, 0, safeCtx: false);     await Task.WhenAll(task0, task1); }<\/code><\/pre>\n<pre><code class=\"cs\">in  (Main) pid:  4.     in  (Test) pid:  4. TestSmallDelayAndConfigureAwaitForZero         in  (Task) pid:  4. tid:  0, sleep: 1000, delay: 1, safeCtx:  True, yield: False         in  (Task) pid:  4. tid:  1, sleep: 2000, delay: 0, safeCtx: False, yield: False         out (Task) pid: 15. tid:  0,         out (Task) pid:  4. tid:  1,     out (Test) pid:  4.     total sleep: 2,019 ms out (Main) pid:  4<\/code><\/pre>\n<h3>Use the Task.Run, Luke!<\/h3>\n<pre><code class=\"cs\">async Task TestTaskRun() {     var task0 = Task.Run(() => MethodAsync(0, 1000));     var task1 = Task.Factory.StartNew(() => MethodAsync(1, 2000));     await Task.WhenAll(task0, task1); }<\/code><\/pre>\n<pre><code class=\"cs\">in  (Main) pid:  4.     in  (Test) pid:  4. TestTaskRun         in  (Task) pid:  5. tid:  0, sleep: 1000, delay: 0, safeCtx:  True, yield: False         in  (Task) pid:  0. tid:  1, sleep: 2000, delay: 0, safeCtx:  True, yield: False         out (Task) pid:  5. tid:  0,         out (Task) pid:  0. tid:  1,     out (Test) pid:  0.     total sleep: 2,016 ms out (Main) pid:  0.<\/code><\/pre>\n<p>\u0412\u0441\u0435\u0433\u0434\u0430 \u0437\u0430\u043f\u0443\u0441\u043a\u0430\u0439\u0442\u0435 \u0441\u0432\u043e\u0438 \u0442\u0430\u0441\u043a\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044f Task.Run \u0438\u043b\u0438 Task.Factory.StartNew. <br \/>\u0415\u0441\u0442\u044c \u0435\u0449\u0435, \u043a\u043e\u043d\u0435\u0447\u043d\u043e, \u0432\u0430\u0440\u0438\u0430\u043d\u0442 \u0441 Task.Start(), \u043d\u043e \u0432\u0435\u0440\u0445\u043d\u0438\u0435 \u0434\u0432\u0430 \u043a\u0443\u0434\u0430 \u0431\u043e\u043b\u0435\u0435 \u0443\u0434\u043e\u0431\u043d\u044b\u0435 \u0438 \u0433\u0438\u0431\u043a\u0438\u0435.<\/p>\n<p>\u0418\u0437 \u0437\u0430\u043f\u0443\u0441\u043a\u043e\u0432 \u0432\u0438\u0434\u043d\u043e, out pid main \u0438\u043d\u043e\u0433\u0434\u0430  \u043e\u0442\u043b\u0438\u0447\u0430\u0435\u0442\u0441\u044f \u043e\u0442 in pid main, \u0442\u043e \u0435\u0441\u0442\u044c \u0432 \u0441\u043b\u043e\u0436\u043d\u044b\u0445 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f\u0445, \u0432\u0435\u0440\u043e\u044f\u0442\u043d\u043e\u0441\u0442\u044c \u0437\u0430\u043f\u0443\u0441\u0442\u0438\u0442\u044c\u0441\u044f \u043d\u0430 main \u043d\u0438\u0436\u0435, \u043d\u043e \u044d\u0442\u043e \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u043e.<\/p>\n<h2>\u0410 \u0442\u0435\u043f\u0435\u0440\u044c \u043b\u043e\u0432\u0438\u043c deadlock<\/h2>\n<figure class=\"\">\n<div><figcaption>Thread&#8217;\u044b \u0432\u044b\u044f\u0441\u043d\u044f\u044e\u0442, \u043a\u0442\u043e \u043b\u043e\u043a\u043d\u0443\u043b \u0440\u0435\u0441\u0443\u0440\u0441\u044b<\/figcaption><\/div>\n<\/figure>\n<p>\u041f\u0438\u0448\u0435\u043c \u043a\u0430\u043a\u043e\u0439-\u0442\u043e producer-consumer \u0441 async\\await \u0432\u043d\u0443\u0442\u0440\u0438, \u0434\u0430\u0436\u0435 \u0434\u043e\u0431\u0430\u0432\u0438\u043b\u0438 CancelationToken&#8217;\u044b \u0438 TaskCreationOptions, \u043d\u043e \u0437\u0430\u0431\u044b\u043b\u0438 Task.Run.<\/p>\n<p>\u041b\u043e\u0432\u0438\u043c deadlock \u0438 \u0443\u0436\u0435 \u043d\u0438\u0447\u0435\u0433\u043e \u043d\u0430\u043c \u043d\u0435 \u043f\u043e\u043c\u043e\u0436\u0435\u0442, \u0432\u043a\u043b\u044e\u0447\u0430\u044f timeout;<\/p>\n<pre><code class=\"cs\">async Task TestDeadlock() {     var source = new CancellationTokenSource(TimeSpan.FromSeconds(5));     var channel = Channel.CreateBounded&lt;int>(100);      var writeTask = new Task(async () => \/\/ Task.Run(async () =>     {         try         {             foreach (var i in Enumerable.Range(0, 10000))             {                 await channel.Writer.WriteAsync(i, source.Token);             }         }         catch (Exception ex)         {             Console.WriteLine(\"U think u can exit by timeout? But u got lock on main thread\");         }         finally         {             channel.Writer.TryComplete();         }     }, TaskCreationOptions.PreferFairness | TaskCreationOptions.LongRunning);      var readTask = new Task(async () => \/\/ Task.Run(async () =>     {         try         {             var sum = 0;             Console.Write(\"calc sum\");             while (await channel.Reader.WaitToReadAsync(source.Token))             {                 var i = await channel.Reader.ReadAsync(source.Token);                 sum += i;                 Console.Write(new string('.', (i % 3)+1).PadRight(3));                 Console.SetCursorPosition(Console.CursorLeft - 3, Console.CursorTop);             }             Console.WriteLine();             Console.WriteLine($\"sum: {sum}\");         }         catch (Exception ex)         {             Console.WriteLine(\"U think u can exit by timeout? But u got lock on main thread\");         }     }, TaskCreationOptions.PreferFairness | TaskCreationOptions.LongRunning);      await Task.WhenAll(writeTask, readTask); }<\/code><\/pre>\n<p>\u042d\u0442\u043e\u0442 \u043f\u0440\u0438\u043c\u0435\u0440 \u043f\u043e\u043a\u0430\u0437\u044b\u0432\u0430\u0435\u0442, \u0447\u0442\u043e \u0434\u0432\u0430 \u0442\u0435\u0441\u0442\u0430 \u0432\u044b\u0448\u0435 <strong>TestDelayAndYield<\/strong> \u0438 <strong>TestSmallDelayAndConfigureAwaitForZero <\/strong>\u043d\u0435 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u043e \u043f\u043e\u0441\u043b\u0435 await \u0443\u0439\u0434\u0443\u0442 \u0432 \u043f\u0443\u043b \u0438 \u043f\u043e\u043b\u0430\u0433\u0430\u0442\u044c\u0441\u044f \u043d\u0430 \u044d\u0442\u043e \u043f\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u0435 \u043d\u0435 \u0441\u0442\u043e\u0438\u0442.<\/p>\n<p>\u041d\u0435 \u0440\u0430\u0441\u0441\u0447\u0438\u0442\u044b\u0432\u0430\u0439\u0442\u0435 \u043d\u0430 undefined behavior \u0438 \u0432\u0441\u0435\u0433\u0434\u0430 \u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u043e \u0437\u0430\u043f\u0443\u0441\u043a\u0430\u0439\u0442\u0435 \u0441\u0432\u043e\u0438 \u0442\u0430\u0441\u043a\u0438.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<p><!----><!----><\/div>\n<p><!----><!----><br \/> \u0441\u0441\u044b\u043b\u043a\u0430 \u043d\u0430 \u043e\u0440\u0438\u0433\u0438\u043d\u0430\u043b \u0441\u0442\u0430\u0442\u044c\u0438 <a href=\"https:\/\/habr.com\/ru\/articles\/792788\/\"> https:\/\/habr.com\/ru\/articles\/792788\/<\/a><br \/><\/br><\/br><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-367857","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/posts\/367857","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=367857"}],"version-history":[{"count":0,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/posts\/367857\/revisions"}],"wp:attachment":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=367857"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=367857"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=367857"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}