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//
// TaskFactory_T.cs
//
// Authors:
// Jérémie "Garuma" Laval <jeremie.laval@gmail.com>
// Marek Safar <marek.safar@gmail.com>
//
// Copyright (c) 2009 Jérémie "Garuma" Laval
// Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#if NET_4_0
namespace System.Threading.Tasks
{
public class TaskFactory<TResult>
{
readonly TaskScheduler scheduler;
TaskCreationOptions creationOptions;
TaskContinuationOptions continuationOptions;
CancellationToken cancellationToken;
TaskFactory parent;
public TaskFactory ()
: this (CancellationToken.None)
{
}
public TaskFactory (TaskScheduler scheduler)
: this (CancellationToken.None, TaskCreationOptions.None, TaskContinuationOptions.None, scheduler)
{
}
public TaskFactory (CancellationToken cancellationToken)
: this (cancellationToken, TaskCreationOptions.None, TaskContinuationOptions.None, null)
{
}
public TaskFactory (TaskCreationOptions creationOptions, TaskContinuationOptions continuationOptions)
: this (CancellationToken.None, creationOptions, continuationOptions, null)
{
}
public TaskFactory (CancellationToken cancellationToken, TaskCreationOptions creationOptions, TaskContinuationOptions continuationOptions, TaskScheduler scheduler)
{
this.cancellationToken = cancellationToken;
this.scheduler = scheduler;
this.creationOptions = creationOptions;
this.continuationOptions = continuationOptions;
TaskFactory.CheckContinuationOptions (continuationOptions);
this.parent = new TaskFactory (cancellationToken, creationOptions, continuationOptions, scheduler);
}
public TaskScheduler Scheduler {
get {
return scheduler;
}
}
public TaskContinuationOptions ContinuationOptions {
get {
return continuationOptions;
}
}
public TaskCreationOptions CreationOptions {
get {
return creationOptions;
}
}
public CancellationToken CancellationToken {
get {
return cancellationToken;
}
}
#region StartNew for Task<TResult>
public Task<TResult> StartNew (Func<TResult> function)
{
return StartNew (function, cancellationToken, creationOptions, GetScheduler ());
}
public Task<TResult> StartNew (Func<TResult> function, TaskCreationOptions creationOptions)
{
return StartNew (function, cancellationToken, creationOptions, GetScheduler ());
}
public Task<TResult> StartNew (Func<TResult> function, CancellationToken cancellationToken)
{
return StartNew (function, cancellationToken, creationOptions, GetScheduler ());
}
public Task<TResult> StartNew (Func<TResult> function,
CancellationToken cancellationToken,
TaskCreationOptions creationOptions,
TaskScheduler scheduler)
{
return StartNew ((o) => function (), null, cancellationToken, creationOptions, scheduler);
}
public Task<TResult> StartNew (Func<object, TResult> function, object state)
{
return StartNew (function, state, cancellationToken, creationOptions, GetScheduler ());
}
public Task<TResult> StartNew (Func<object, TResult> function, object state, TaskCreationOptions creationOptions)
{
return StartNew (function, state, cancellationToken, creationOptions, GetScheduler ());
}
public Task<TResult> StartNew (Func<object, TResult> function, object state, CancellationToken cancellationToken)
{
return StartNew (function, state, cancellationToken, creationOptions, GetScheduler ());
}
public Task<TResult> StartNew (Func<object, TResult> function, object state,
CancellationToken cancellationToken,
TaskCreationOptions creationOptions,
TaskScheduler scheduler)
{
return parent.StartNew<TResult> (function, state, cancellationToken, creationOptions, scheduler);
}
#endregion
#region Continue
public Task<TResult> ContinueWhenAny (Task[] tasks,
Func<Task, TResult> continuationFunction)
{
return ContinueWhenAny (tasks, continuationFunction, cancellationToken, continuationOptions, GetScheduler ());
}
public Task<TResult> ContinueWhenAny (Task[] tasks,
Func<Task, TResult> continuationFunction,
CancellationToken cancellationToken)
{
return ContinueWhenAny (tasks, continuationFunction, cancellationToken, continuationOptions, GetScheduler ());
}
public Task<TResult> ContinueWhenAny (Task[] tasks,
Func<Task, TResult> continuationFunction,
TaskContinuationOptions continuationOptions)
{
return ContinueWhenAny (tasks, continuationFunction, cancellationToken, continuationOptions, GetScheduler ());
}
public Task<TResult> ContinueWhenAny (Task[] tasks,
Func<Task, TResult> continuationFunction,
CancellationToken cancellationToken,
TaskContinuationOptions continuationOptions,
TaskScheduler scheduler)
{
return parent.ContinueWhenAny (tasks, continuationFunction, cancellationToken, continuationOptions, scheduler);
}
public Task<TResult> ContinueWhenAny<TAntecedentResult> (Task<TAntecedentResult>[] tasks,
Func<Task<TAntecedentResult>, TResult> continuationFunction)
{
return ContinueWhenAny (tasks, continuationFunction, cancellationToken, continuationOptions, GetScheduler ());
}
public Task<TResult> ContinueWhenAny<TAntecedentResult> (Task<TAntecedentResult>[] tasks,
Func<Task<TAntecedentResult>, TResult> continuationFunction,
CancellationToken cancellationToken)
{
return ContinueWhenAny (tasks, continuationFunction, cancellationToken, continuationOptions, GetScheduler ());
}
public Task<TResult> ContinueWhenAny<TAntecedentResult> (Task<TAntecedentResult>[] tasks,
Func<Task<TAntecedentResult>, TResult> continuationFunction,
TaskContinuationOptions continuationOptions)
{
return ContinueWhenAny (tasks, continuationFunction, cancellationToken, continuationOptions, GetScheduler ());
}
public Task<TResult> ContinueWhenAny<TAntecedentResult> (Task<TAntecedentResult>[] tasks,
Func<Task<TAntecedentResult>, TResult> continuationFunction,
CancellationToken cancellationToken,
TaskContinuationOptions continuationOptions,
TaskScheduler scheduler)
{
return parent.ContinueWhenAny (tasks, continuationFunction, cancellationToken, continuationOptions, scheduler);
}
public Task<TResult> ContinueWhenAll (Task[] tasks, Func<Task[], TResult> continuationFunction)
{
return ContinueWhenAll (tasks, continuationFunction, cancellationToken, continuationOptions, GetScheduler ());
}
public Task<TResult> ContinueWhenAll (Task[] tasks,
Func<Task[], TResult> continuationFunction,
TaskContinuationOptions continuationOptions)
{
return ContinueWhenAll (tasks, continuationFunction, cancellationToken, continuationOptions, GetScheduler ());
}
public Task<TResult> ContinueWhenAll (Task[] tasks,
Func<Task[], TResult> continuationFunction,
CancellationToken cancellationToken)
{
return ContinueWhenAll (tasks, continuationFunction, cancellationToken, continuationOptions, GetScheduler ());
}
public Task<TResult> ContinueWhenAll (Task[] tasks,
Func<Task[], TResult> continuationFunction,
CancellationToken cancellationToken,
TaskContinuationOptions continuationOptions, TaskScheduler scheduler)
{
return parent.ContinueWhenAll (tasks, continuationFunction, cancellationToken, continuationOptions, scheduler);
}
public Task<TResult> ContinueWhenAll<TAntecedentResult> (Task<TAntecedentResult>[] tasks,
Func<Task<TAntecedentResult>[], TResult> continuationFunction)
{
return ContinueWhenAll (tasks, continuationFunction, cancellationToken, continuationOptions, GetScheduler ());
}
public Task<TResult> ContinueWhenAll<TAntecedentResult> (Task<TAntecedentResult>[] tasks,
Func<Task<TAntecedentResult>[], TResult> continuationFunction,
TaskContinuationOptions continuationOptions)
{
return ContinueWhenAll (tasks, continuationFunction, cancellationToken, continuationOptions, GetScheduler ());
}
public Task<TResult> ContinueWhenAll<TAntecedentResult> (Task<TAntecedentResult>[] tasks,
Func<Task<TAntecedentResult>[], TResult> continuationFunction,
CancellationToken cancellationToken)
{
return ContinueWhenAll (tasks, continuationFunction, cancellationToken, continuationOptions, GetScheduler ());
}
public Task<TResult> ContinueWhenAll<TAntecedentResult> (Task<TAntecedentResult>[] tasks,
Func<Task<TAntecedentResult>[], TResult> continuationFunction,
CancellationToken cancellationToken,
TaskContinuationOptions continuationOptions, TaskScheduler scheduler)
{
return parent.ContinueWhenAll (tasks, continuationFunction, cancellationToken, continuationOptions, scheduler);
}
#endregion
#region FromAsync
public Task<TResult> FromAsync (IAsyncResult asyncResult, Func<IAsyncResult, TResult> endMethod)
{
return FromAsync (asyncResult, endMethod, creationOptions);
}
public Task<TResult> FromAsync (IAsyncResult asyncResult, Func<IAsyncResult, TResult> endMethod, TaskCreationOptions creationOptions)
{
return FromAsync (asyncResult, endMethod, creationOptions, GetScheduler ());
}
public Task<TResult> FromAsync (IAsyncResult asyncResult, Func<IAsyncResult, TResult> endMethod, TaskCreationOptions creationOptions, TaskScheduler scheduler)
{
return FromIAsyncResult (asyncResult, endMethod, creationOptions, scheduler);
}
internal static Task<TResult> FromIAsyncResult (IAsyncResult asyncResult, Func<IAsyncResult, TResult> endMethod, TaskCreationOptions creationOptions, TaskScheduler scheduler)
{
if (asyncResult == null)
throw new ArgumentNullException ("asyncResult");
if (endMethod == null)
throw new ArgumentNullException ("endMethod");
if (scheduler == null)
throw new ArgumentNullException ("scheduler");
if ((creationOptions & Task.WorkerTaskNotSupportedOptions) != 0)
throw new ArgumentOutOfRangeException ("creationOptions");
var source = new CancellationTokenSource ();
var task = new Task<TResult> (l => {
try {
return endMethod (asyncResult);
} catch (OperationCanceledException) {
source.Cancel ();
source.Token.ThrowIfCancellationRequested ();
}
return default (TResult);
}, null, source.Token, creationOptions);
// Take quick path for completed operations
if (asyncResult.IsCompleted) {
task.RunSynchronously (scheduler);
} else {
ThreadPool.RegisterWaitForSingleObject (asyncResult.AsyncWaitHandle,
(s, t) => task.RunSynchronously (scheduler),
null, Timeout.Infinite, true);
}
return task;
}
public Task<TResult> FromAsync (Func<AsyncCallback, object, IAsyncResult> beginMethod, Func<IAsyncResult, TResult> endMethod,
object state)
{
return FromAsync (beginMethod, endMethod, state, creationOptions);
}
public Task<TResult> FromAsync (Func<AsyncCallback, object, IAsyncResult> beginMethod, Func<IAsyncResult, TResult> endMethod,
object state, TaskCreationOptions creationOptions)
{
return FromAsyncBeginEnd (beginMethod, endMethod, state, creationOptions);
}
internal static Task<TResult> FromAsyncBeginEnd (Func<AsyncCallback, object, IAsyncResult> beginMethod, Func<IAsyncResult, TResult> endMethod,
object state, TaskCreationOptions creationOptions)
{
if (beginMethod == null)
throw new ArgumentNullException ("beginMethod");
if (endMethod == null)
throw new ArgumentNullException ("endMethod");
if ((creationOptions & Task.WorkerTaskNotSupportedOptions) != 0)
throw new ArgumentOutOfRangeException ("creationOptions");
var tcs = new TaskCompletionSource<TResult> (state, creationOptions);
var alreadyInvoked = new AtomicBoolean ();
var iar = beginMethod (l => {
if (alreadyInvoked.TryRelaxedSet ())
InnerInvoke (tcs, endMethod, l);
}, state);
if (iar != null && iar.CompletedSynchronously && alreadyInvoked.TryRelaxedSet ())
InnerInvoke (tcs, endMethod, iar);
return tcs.Task;
}
public Task<TResult> FromAsync<TArg1> (Func<TArg1, AsyncCallback, object, IAsyncResult> beginMethod, Func<IAsyncResult, TResult> endMethod,
TArg1 arg1, object state)
{
return FromAsync (beginMethod, endMethod, arg1, state, creationOptions);
}
public Task<TResult> FromAsync<TArg1> (Func<TArg1, AsyncCallback, object, IAsyncResult> beginMethod, Func<IAsyncResult, TResult> endMethod,
TArg1 arg1, object state, TaskCreationOptions creationOptions)
{
return FromAsyncBeginEnd (beginMethod, endMethod, arg1, state, creationOptions);
}
internal static Task<TResult> FromAsyncBeginEnd<TArg1> (Func<TArg1, AsyncCallback, object, IAsyncResult> beginMethod,
Func<IAsyncResult, TResult> endMethod,
TArg1 arg1, object state, TaskCreationOptions creationOptions)
{
if (beginMethod == null)
throw new ArgumentNullException ("beginMethod");
if (endMethod == null)
throw new ArgumentNullException ("endMethod");
if ((creationOptions & Task.WorkerTaskNotSupportedOptions) != 0)
throw new ArgumentOutOfRangeException ("creationOptions");
var tcs = new TaskCompletionSource<TResult> (state, creationOptions);
var alreadyInvoked = new AtomicBoolean ();
var iar = beginMethod (arg1, l => {
if (alreadyInvoked.TryRelaxedSet ())
InnerInvoke (tcs, endMethod, l);
}, state);
if (iar != null && iar.CompletedSynchronously && alreadyInvoked.TryRelaxedSet ())
InnerInvoke (tcs, endMethod, iar);
return tcs.Task;
}
public Task<TResult> FromAsync<TArg1, TArg2> (Func<TArg1, TArg2, AsyncCallback, object, IAsyncResult> beginMethod, Func<IAsyncResult, TResult> endMethod,
TArg1 arg1, TArg2 arg2, object state)
{
return FromAsync (beginMethod, endMethod, arg1, arg2, state, creationOptions);
}
public Task<TResult> FromAsync<TArg1, TArg2> (Func<TArg1, TArg2, AsyncCallback, object, IAsyncResult> beginMethod, Func<IAsyncResult, TResult> endMethod,
TArg1 arg1, TArg2 arg2, object state, TaskCreationOptions creationOptions)
{
return FromAsyncBeginEnd (beginMethod, endMethod, arg1, arg2, state, creationOptions);
}
internal static Task<TResult> FromAsyncBeginEnd<TArg1, TArg2> (Func<TArg1, TArg2, AsyncCallback, object, IAsyncResult> beginMethod, Func<IAsyncResult, TResult> endMethod,
TArg1 arg1, TArg2 arg2, object state, TaskCreationOptions creationOptions)
{
if (beginMethod == null)
throw new ArgumentNullException ("beginMethod");
if (endMethod == null)
throw new ArgumentNullException ("endMethod");
if ((creationOptions & Task.WorkerTaskNotSupportedOptions) != 0)
throw new ArgumentOutOfRangeException ("creationOptions");
var tcs = new TaskCompletionSource<TResult> (state, creationOptions);
var alreadyInvoked = new AtomicBoolean ();
var iar = beginMethod (arg1, arg2, l => {
if (alreadyInvoked.TryRelaxedSet ())
InnerInvoke (tcs, endMethod, l);
}, state);
if (iar != null && iar.CompletedSynchronously && alreadyInvoked.TryRelaxedSet ())
InnerInvoke (tcs, endMethod, iar);
return tcs.Task;
}
public Task<TResult> FromAsync<TArg1, TArg2, TArg3> (Func<TArg1, TArg2, TArg3, AsyncCallback, object, IAsyncResult> beginMethod, Func<IAsyncResult, TResult> endMethod,
TArg1 arg1, TArg2 arg2, TArg3 arg3, object state)
{
return FromAsync (beginMethod, endMethod, arg1, arg2, arg3, state, creationOptions);
}
public Task<TResult> FromAsync<TArg1, TArg2, TArg3> (Func<TArg1, TArg2, TArg3, AsyncCallback, object, IAsyncResult> beginMethod, Func<IAsyncResult, TResult> endMethod,
TArg1 arg1, TArg2 arg2, TArg3 arg3, object state,
TaskCreationOptions creationOptions)
{
return FromAsyncBeginEnd (beginMethod, endMethod, arg1, arg2, arg3, state, creationOptions);
}
internal static Task<TResult> FromAsyncBeginEnd<TArg1, TArg2, TArg3> (Func<TArg1, TArg2, TArg3, AsyncCallback, object, IAsyncResult> beginMethod, Func<IAsyncResult, TResult> endMethod,
TArg1 arg1, TArg2 arg2, TArg3 arg3, object state, TaskCreationOptions creationOptions)
{
if (beginMethod == null)
throw new ArgumentNullException ("beginMethod");
if (endMethod == null)
throw new ArgumentNullException ("endMethod");
if ((creationOptions & Task.WorkerTaskNotSupportedOptions) != 0)
throw new ArgumentOutOfRangeException ("creationOptions");
var tcs = new TaskCompletionSource<TResult> (state, creationOptions);
var alreadyInvoked = new AtomicBoolean ();
var iar = beginMethod (arg1, arg2, arg3, l => {
if (alreadyInvoked.TryRelaxedSet ())
InnerInvoke (tcs, endMethod, l);
}, state);
if (iar != null && iar.CompletedSynchronously && alreadyInvoked.TryRelaxedSet ())
InnerInvoke (tcs, endMethod, iar);
return tcs.Task;
}
#endregion
TaskScheduler GetScheduler ()
{
return scheduler ?? TaskScheduler.Current;
}
static void InnerInvoke (TaskCompletionSource<TResult> tcs, Func<IAsyncResult, TResult> endMethod, IAsyncResult l)
{
try {
tcs.SetResult (endMethod (l));
} catch (OperationCanceledException) {
tcs.SetCanceled ();
} catch (Exception e) {
tcs.SetException (e);
}
}
}
}
#endif
|
