Task Class - Internal Members

This topic describes the internal members of the Task class that help you implement a custom debugger. For general information about this class, see the Task reference topic.

Namespace:  System.Threading.Tasks

Assembly:  mscorlib (in mscorlib.dll)

Because you cannot access these internal members from the .NET Framework, the following syntax is provided in Common Intermediate Language (CIL).

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

Members

Methods

Name	Description
SetNotificationForWaitCompletion Method	Sets or clears the TASK_STATE_WAIT_COMPLETION_NOTIFICATION state bit.
NotifyDebuggerOfWaitCompletion Method	Placeholder method used as a breakpoint target by the debugger.

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 Task parent 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

Reference

Task

Concepts

Parallel Extension Internals for the .NET Framework