Task Class

This topic describes several internal members of the System.Threading.Tasks.Task class to help you implement a custom debugger. For general information about this class, see Task.

备注

This information is specific to .NET Framework 4 and is subject to change in a future release.

Because you cannot access these members from the .NET Framework, this topic provides syntax in Microsoft intermediate language (MSIL). For more information about MSIL, see Compiling to MSIL.

Namespace:  System.Threading.Tasks

Assembly:  mscorlib (in mscorlib.dll)

.class public auto ansi System.Threading.Tasks.Task
       extends System.Object
       implements System.Threading.IThreadPoolWorkItem,
                  System.IAsyncResult,
                  System.IDisposable,
                  System.Threading.ICancelableOperation

Members

Classes

Name	Description
ContingentProperties	Contains additional properties for a Task object.

Fields

Name	Description
m_action	The delegate that represents the code to execute in the Task object.
m_contingentProperties	Stores additional properties of the Task object.
m_parent	The backing field for the TaskParent() property.
m_stateFlags	Stores information about the current state of the Task object.
m_stateObject	An object that represents data that will be used by the action.
m_taskId	The backing field for the Task.Id property.
s_taskIdCounter	The next available identifier for a Task object.
TASK_STATE_CANCELED	Indicates that the task was canceled before it reached the running state, or that the task acknowledged its cancellation and completed without exception.
TASK_STATE_EXECUTED	Indicates that the task is running.
TASK_STATE_FAULTED	Indicates that the task completed because of an unhandled exception.
TASK_STATE_RAN_TO_COMPLETION	Indicates that the task completed execution successfully.
TASK_STATE_WAITING_ON_CHILDREN	Indicates that the task has finished executing its delegate and is implicitly waiting for attached child tasks to finish.

Remarks

The following internal methods are useful to a debugger engine because they mark the entrance to Task code execution:

• Execute

• ExecuteEntry

• ExecuteWithThreadLocal

• Finish

• InnerInvoke

• InternalWait

See Also

Concepts

Parallel Extension Internals for the .NET Framework