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Task Class - Internal Members

This topic describes the internal members of the System.Threading.Tasks.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

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.

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 System.Threading.Tasks.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.

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

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