TpScheduler.cs System System::Threading System::Threading::Tasks // //TpScheduler.cs // //Authors: //JérémieLaval<jeremiedotlavalatxamarindotcom> //MarekSafar<marek.safar@gmail.com> // //Copyright(c)2011Jérémie"Garuma"Laval //Copyright2012XamarinInc(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.Collections.Generic; namespaceSystem.Threading.Tasks { sealedclassTpScheduler:TaskScheduler { staticreadonlyWaitCallbackcallback=TaskExecuterCallback; protectedinternaloverridevoidQueueTask(Tasktask) { if((task.CreationOptions&TaskCreationOptions.LongRunning)!=0){ varthread=newThread(l=>((Task)l).Execute()){ IsBackground=true }; thread.Start(task); return; } //SpicyPixel:ThisseemstobeworkingonAOTagain.Ifnot,usebelow. //Themaindifferenceisthatthecallstackisnotpropagatedwiththe //unsafemethodwhichallowsforelevatedsecurityinthequeuedtask //(whichisdesirablehere). // //SwitchingbacktoQueueUserWorkItemasitworkswith2.0subset. //ThreadPool.UnsafeQueueUserWorkItem(callback,task); ThreadPool.QueueUserWorkItem(callback,task); } staticvoidTaskExecuterCallback(objectobj) { Tasktask=(Task)obj; task.Execute(); } protectedoverrideIEnumerable<Task>GetScheduledTasks() { thrownewNotImplementedException(); } [MonoTODO("Taskscannotbedequeued")] protectedinternaloverrideboolTryDequeue(Tasktask) { returnfalse; } protectedoverrideboolTryExecuteTaskInline(Tasktask,booltaskWasPreviouslyQueued) { if(taskWasPreviouslyQueued&&!TryDequeue(task)) returnfalse; returnTryExecuteTask(task); } } } #endif