TaskCompletionSource.cs System::Threading::Tasks::TaskCompletionSource System System::Threading System::Threading::Tasks // //TaskCompletionSource.cs // //Authors: //Jérémie"Garuma"Laval<jeremie.laval@gmail.com> //MarekSafar<marek.safar@gmail.com> // //Copyright(c)2009Jérémie"Garuma"Laval //Copyright2011Xamarin,Inc(http://www.xamarin.com) // //Permissionisherebygranted,freeofcharge,toanypersonobtainingacopy //ofthissoftwareandassociateddocumentationfiles(the"Software"),todeal //intheSoftwarewithoutrestriction,includingwithoutlimitationtherights //touse,copy,modify,merge,publish,distribute,sublicense,and/orsell //copiesoftheSoftware,andtopermitpersonstowhomtheSoftwareis //furnishedtodoso,subjecttothefollowingconditions: // //Theabovecopyrightnoticeandthispermissionnoticeshallbeincludedin //allcopiesorsubstantialportionsoftheSoftware. // //THESOFTWAREISPROVIDED"ASIS",WITHOUTWARRANTYOFANYKIND,EXPRESSOR //IMPLIED,INCLUDINGBUTNOTLIMITEDTOTHEWARRANTIESOFMERCHANTABILITY, //FITNESSFORAPARTICULARPURPOSEANDNONINFRINGEMENT.INNOEVENTSHALLTHE //AUTHORSORCOPYRIGHTHOLDERSBELIABLEFORANYCLAIM,DAMAGESOROTHER //LIABILITY,WHETHERINANACTIONOFCONTRACT,TORTOROTHERWISE,ARISINGFROM, //OUTOFORINCONNECTIONWITHTHESOFTWAREORTHEUSEOROTHERDEALINGSIN //THESOFTWARE. #ifNET_4_0||UNITY_5_3_OR_NEWER usingSystem; usingSystem.Collections.Generic; namespaceSystem.Threading.Tasks { publicclassTaskCompletionSource<TResult> { readonlyTask<TResult>source; publicTaskCompletionSource() :this(null,TaskCreationOptions.None) { } publicTaskCompletionSource(objectstate) :this(state,TaskCreationOptions.None) { } publicTaskCompletionSource(TaskCreationOptionscreationOptions) :this(null,creationOptions) { } publicTaskCompletionSource(objectstate,TaskCreationOptionscreationOptions) { if((creationOptions&System.Threading.Tasks.Task.WorkerTaskNotSupportedOptions)!=0) thrownewArgumentOutOfRangeException("creationOptions"); source=newTask<TResult>(TaskActionInvoker.Empty,state,CancellationToken.None,creationOptions,null); source.SetupScheduler(TaskScheduler.Current); } publicvoidSetCanceled() { if(!TrySetCanceled()) ThrowInvalidException(); } publicvoidSetException(Exceptionexception) { if(exception==null) thrownewArgumentNullException("exception"); SetException(newException[]{exception}); } publicvoidSetException(IEnumerable<Exception>exceptions) { if(!TrySetException(exceptions)) ThrowInvalidException(); } publicvoidSetResult(TResultresult) { if(!TrySetResult(result)) ThrowInvalidException(); } staticvoidThrowInvalidException() { thrownewInvalidOperationException("TheunderlyingTaskisalreadyinoneofthethreefinalstates:RanToCompletion,Faulted,orCanceled."); } publicboolTrySetCanceled() { returnsource.TrySetCanceled(); } publicboolTrySetException(Exceptionexception) { if(exception==null) thrownewArgumentNullException("exception"); returnTrySetException(newException[]{exception}); } publicboolTrySetException(IEnumerable<Exception>exceptions) { if(exceptions==null) thrownewArgumentNullException("exceptions"); varaggregate=newAggregateException(exceptions); if(aggregate.InnerExceptions.Count==0) thrownewArgumentNullException("exceptions"); returnsource.TrySetException(aggregate); } publicboolTrySetResult(TResultresult) { returnsource.TrySetResult(result); } publicTask<TResult>Task{ get{ returnsource; } } } } #endif