ThreadPool.UnsafeQueueNativeOverlapped Method (System.Threading)

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UnsafeQueueNativeOverlapped Method

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This page is specific to

Microsoft Visual Studio 2008/.NET Framework 3.5

Other versions are also available for the following:

.NET Framework Class Library

ThreadPool..::.UnsafeQueueNativeOverlapped Method

Queues an overlapped I/O operation for execution.

This API is not CLS-compliant.

Namespace: System.Threading
Assembly: mscorlib (in mscorlib.dll)

Syntax

Visual Basic (Declaration)

<CLSCompliantAttribute(False)> _
<SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags := SecurityPermissionFlag.NoFlags Or SecurityPermissionFlag.ControlEvidence Or SecurityPermissionFlag.ControlPolicy)> _
Public Shared Function UnsafeQueueNativeOverlapped ( _
    overlapped As NativeOverlapped* _
) As Boolean

Visual Basic (Usage)

Visual basic does not support APIs that consume or return unsafe types.

[CLSCompliantAttribute(false)]
[SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.NoFlags|SecurityPermissionFlag.ControlEvidence|SecurityPermissionFlag.ControlPolicy)]
public static bool UnsafeQueueNativeOverlapped(
    NativeOverlapped* overlapped
)

Visual C++

[CLSCompliantAttribute(false)]
[SecurityPermissionAttribute(SecurityAction::LinkDemand, Flags = SecurityPermissionFlag::NoFlags|SecurityPermissionFlag::ControlEvidence|SecurityPermissionFlag::ControlPolicy)]
public:
static bool UnsafeQueueNativeOverlapped(
    NativeOverlapped* overlapped
)

JScript

JScript does not support APIs that consume or return unsafe types.

Parameters

overlapped: Type: System.Threading..::.NativeOverlapped*
The NativeOverlapped structure to queue.

Return Value

Type: System..::.Boolean
true if the operation was successfully queued to an I/O completion port; otherwise, false.

Remarks

For information about using native Win32 overlapped I/O, see the Overlapped class, the NativeOverlapped structure, and the OVERLAPPED structure in the Win32 Platform SDK.

Caution:
Using the UnsafeQueueNativeOverlapped method could inadvertently open up a security hole. Code access security bases its permission checks on the permissions of all the callers on the stack. When work is queued on a thread pool thread using UnsafeQueueNativeOverlapped, the stack of the thread pool thread does not have the context of the actual callers. Malicious code might be able exploit this to avoid permission checks.

Caution:

Using the UnsafeQueueNativeOverlapped method could inadvertently open up a security hole. Code access security bases its permission checks on the permissions of all the callers on the stack. When work is queued on a thread pool thread using UnsafeQueueNativeOverlapped, the stack of the thread pool thread does not have the context of the actual callers. Malicious code might be able exploit this to avoid permission checks.

.NET Framework Security

SecurityPermission
for the ability to view and alter evidence and the ability to view and modify policy. Associated enumerations: SecurityPermissionFlag..::.ControlEvidence, SecurityPermissionFlag..::.ControlPolicy. Security action: LinkDemand.

Platforms

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Version Information

.NET Framework

Supported in: 3.5, 3.0, 2.0

Reference

ThreadPool Class

ThreadPool Members

System.Threading Namespace