TaskAwaiter.cs System::Runtime::CompilerServices::TaskAwaiter System System::Runtime System::Runtime::CompilerServices // //TaskAwaiter.cs // //Authors: //MarekSafar<marek.safar@gmail.com> // //Copyright(C)2011Novell,Inc(http://www.novell.com) //Copyright(C)2011Xamarin,Inc(http://www.xamarin.com) // //Permissionisherebygranted,freeofcharge,toanypersonobtaining //acopyofthissoftwareandassociateddocumentationfiles(the //"Software"),todealintheSoftwarewithoutrestriction,including //withoutlimitationtherightstouse,copy,modify,merge,publish, //distribute,sublicense,and/orsellcopiesoftheSoftware,andto //permitpersonstowhomtheSoftwareisfurnishedtodoso,subjectto //thefollowingconditions: // //Theabovecopyrightnoticeandthispermissionnoticeshallbe //includedinallcopiesorsubstantialportionsoftheSoftware. // //THESOFTWAREISPROVIDED"ASIS",WITHOUTWARRANTYOFANYKIND, //EXPRESSORIMPLIED,INCLUDINGBUTNOTLIMITEDTOTHEWARRANTIESOF //MERCHANTABILITY,FITNESSFORAPARTICULARPURPOSEAND //NONINFRINGEMENT.INNOEVENTSHALLTHEAUTHORSORCOPYRIGHTHOLDERSBE //LIABLEFORANYCLAIM,DAMAGESOROTHERLIABILITY,WHETHERINANACTION //OFCONTRACT,TORTOROTHERWISE,ARISINGFROM,OUTOFORINCONNECTION //WITHTHESOFTWAREORTHEUSEOROTHERDEALINGSINTHESOFTWARE. // #ifNET_4_5||UNITY_5_3_OR_NEWER usingSystem.Threading; usingSystem.Threading.Tasks; namespaceSystem.Runtime.CompilerServices { publicstructTaskAwaiter:ICriticalNotifyCompletion { readonlyTasktask; internalTaskAwaiter(Tasktask) { this.task=task; } publicboolIsCompleted{ get{ returntask.IsCompleted; } } publicvoidGetResult() { if(task.Status!=TaskStatus.RanToCompletion) throwHandleUnexpectedTaskResult(task); } internalstaticExceptionHandleUnexpectedTaskResult(Tasktask) { switch(task.Status){ caseTaskStatus.Canceled: returnnewTaskCanceledException(task); caseTaskStatus.Faulted: returntask.Exception.InnerException; default: returnnewInvalidOperationException("Thetaskhasnotfinishedyet"); } } internalstaticvoidHandleOnCompleted(Tasktask,Actioncontinuation,boolcontinueOnSourceContext,boolmanageContext) { if(continueOnSourceContext&&SynchronizationContext.Current!=null){ task.ContinueWith(newSynchronizationContextContinuation(continuation,SynchronizationContext.Current)); }else{ task.ContinueWith(newActionContinuation(continuation)); } } publicvoidOnCompleted(Actioncontinuation) { if(continuation==null) thrownewArgumentNullException("continuation"); HandleOnCompleted(task,continuation,true,true); } publicvoidUnsafeOnCompleted(Actioncontinuation) { if(continuation==null) thrownewArgumentNullException("continuation"); HandleOnCompleted(task,continuation,true,false); } } } #endif