Overlapped.UnsafePack 方法

定义

命名空间:: System.Threading

程序集:: netstandard.dll, System.Threading.Overlapped.dll

程序集:: System.Threading.Overlapped.dll

程序集:: mscorlib.dll

程序集:: netstandard.dll

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

将当前实例打包到结构 NativeOverlapped 中。不传播调用堆栈。

重载

名称	说明
UnsafePack(IOCompletionCallback)	已过时. 已过时. 已过时. 将当前实例打包到一个结构中 NativeOverlapped ，指定在异步 I/O 操作完成时要调用的委托。不传播调用堆栈。
UnsafePack(IOCompletionCallback, Object)	将当前实例打包到结构 NativeOverlapped 中，指定要在异步 I/O 操作完成时要调用的委托，以及用作缓冲区的托管对象。不传播调用堆栈。

UnsafePack(IOCompletionCallback)

Source:: Overlapped.cs

Source:: Overlapped.cs

Source:: Overlapped.cs

Source:: Overlapped.cs

Source:: Overlapped.cs

注意

This overload is not safe and has been deprecated. Use UnsafePack(IOCompletionCallback?, object?) instead.

注意

This method is not safe. Use UnsafePack (iocb, userData) instead. https://go.microsoft.com/fwlink/?linkid=14202

注意

This method is not safe. Use UnsafePack (iocb, userData) instead. http://go.microsoft.com/fwlink/?linkid=14202

重要

此 API 不符合 CLS。

将当前实例打包到一个结构中 NativeOverlapped ，指定在异步 I/O 操作完成时要调用的委托。不传播调用堆栈。

public:
 System::Threading::NativeOverlapped* UnsafePack(System::Threading::IOCompletionCallback ^ iocb);

[System.CLSCompliant(false)]
[System.Obsolete("This overload is not safe and has been deprecated. Use UnsafePack(IOCompletionCallback?, object?) instead.")]
public System.Threading.NativeOverlapped* UnsafePack(System.Threading.IOCompletionCallback? iocb);

[System.CLSCompliant(false)]
[System.Obsolete("This method is not safe.  Use UnsafePack (iocb, userData) instead.  https://go.microsoft.com/fwlink/?linkid=14202")]
public System.Threading.NativeOverlapped* UnsafePack(System.Threading.IOCompletionCallback? iocb);

[System.CLSCompliant(false)]
[System.Obsolete("This method is not safe.  Use UnsafePack (iocb, userData) instead.  http://go.microsoft.com/fwlink/?linkid=14202")]
public System.Threading.NativeOverlapped* UnsafePack(System.Threading.IOCompletionCallback iocb);

[System.CLSCompliant(false)]
public System.Threading.NativeOverlapped* UnsafePack(System.Threading.IOCompletionCallback iocb);

[System.CLSCompliant(false)]
[System.Obsolete("This method is not safe.  Use UnsafePack (iocb, userData) instead.  http://go.microsoft.com/fwlink/?linkid=14202")]
[System.Security.SecurityCritical]
public System.Threading.NativeOverlapped* UnsafePack(System.Threading.IOCompletionCallback iocb);

[System.CLSCompliant(false)]
[System.Obsolete("This method is not safe.  Use UnsafePack (iocb, userData) instead.  https://go.microsoft.com/fwlink/?linkid=14202")]
public System.Threading.NativeOverlapped* UnsafePack(System.Threading.IOCompletionCallback iocb);

[<System.CLSCompliant(false)>]
[<System.Obsolete("This overload is not safe and has been deprecated. Use UnsafePack(IOCompletionCallback?, object?) instead.")>]
member this.UnsafePack : System.Threading.IOCompletionCallback -> nativeptr<System.Threading.NativeOverlapped>

[<System.CLSCompliant(false)>]
[<System.Obsolete("This method is not safe.  Use UnsafePack (iocb, userData) instead.  https://go.microsoft.com/fwlink/?linkid=14202")>]
member this.UnsafePack : System.Threading.IOCompletionCallback -> nativeptr<System.Threading.NativeOverlapped>

[<System.CLSCompliant(false)>]
[<System.Obsolete("This method is not safe.  Use UnsafePack (iocb, userData) instead.  http://go.microsoft.com/fwlink/?linkid=14202")>]
member this.UnsafePack : System.Threading.IOCompletionCallback -> nativeptr<System.Threading.NativeOverlapped>

[<System.CLSCompliant(false)>]
member this.UnsafePack : System.Threading.IOCompletionCallback -> nativeptr<System.Threading.NativeOverlapped>

[<System.CLSCompliant(false)>]
[<System.Obsolete("This method is not safe.  Use UnsafePack (iocb, userData) instead.  http://go.microsoft.com/fwlink/?linkid=14202")>]
[<System.Security.SecurityCritical>]
member this.UnsafePack : System.Threading.IOCompletionCallback -> nativeptr<System.Threading.NativeOverlapped>

参数

iocb: IOCompletionCallback

表示 IOCompletionCallback 异步 I/O 操作完成时调用的回调方法的委托。

NativeOverlapped*

指向结构的非托管指针 NativeOverlapped 。

属性: CLSCompliantAttribute ObsoleteAttribute SecurityCriticalAttribute

例外

InvalidOperationException

当前 Overlapped 已打包。

注解

此方法返回的非托管指针可以通过重叠 I/O 操作传递到操作系统。该 NativeOverlapped 结构在物理内存中固定，直到 Unpack 调用为止。

调用方负责固定缓冲区。但是，如果卸载应用程序域，则会销毁固定缓冲区的句柄并释放缓冲区，使 I/O 操作写入释放的地址。因此，最好使用 UnsafePack(IOCompletionCallback, Object) 运行时固定缓冲区的方法重载。

Caution

UnsafePack使用该方法可能会无意中打开安全漏洞。代码访问安全基于其权限检查堆栈上所有调用方的权限。该方法 UnsafePack 不会传播调用堆栈。恶意代码可能能够利用此漏洞来避免权限检查。

适用于

UnsafePack(IOCompletionCallback, Object)

Source:: Overlapped.cs

Source:: Overlapped.cs

Source:: Overlapped.cs

Source:: Overlapped.cs

Source:: Overlapped.cs

重要

此 API 不符合 CLS。

将当前实例打包到结构 NativeOverlapped 中，指定要在异步 I/O 操作完成时要调用的委托，以及用作缓冲区的托管对象。不传播调用堆栈。

public:
 System::Threading::NativeOverlapped* UnsafePack(System::Threading::IOCompletionCallback ^ iocb, System::Object ^ userData);

[System.CLSCompliant(false)]
public System.Threading.NativeOverlapped* UnsafePack(System.Threading.IOCompletionCallback? iocb, object? userData);

[System.CLSCompliant(false)]
public System.Threading.NativeOverlapped* UnsafePack(System.Threading.IOCompletionCallback iocb, object userData);

[System.CLSCompliant(false)]
[System.Runtime.InteropServices.ComVisible(false)]
public System.Threading.NativeOverlapped* UnsafePack(System.Threading.IOCompletionCallback iocb, object userData);

[System.CLSCompliant(false)]
[System.Runtime.InteropServices.ComVisible(false)]
[System.Security.SecurityCritical]
public System.Threading.NativeOverlapped* UnsafePack(System.Threading.IOCompletionCallback iocb, object userData);

[<System.CLSCompliant(false)>]
member this.UnsafePack : System.Threading.IOCompletionCallback * obj -> nativeptr<System.Threading.NativeOverlapped>

[<System.CLSCompliant(false)>]
[<System.Runtime.InteropServices.ComVisible(false)>]
member this.UnsafePack : System.Threading.IOCompletionCallback * obj -> nativeptr<System.Threading.NativeOverlapped>

[<System.CLSCompliant(false)>]
[<System.Runtime.InteropServices.ComVisible(false)>]
[<System.Security.SecurityCritical>]
member this.UnsafePack : System.Threading.IOCompletionCallback * obj -> nativeptr<System.Threading.NativeOverlapped>