InteropPermission Class

Article
04/11/2014

Controls the ability to call unmanaged and managed code.

Syntax

class InteropPermission extends CodeAccessPermission

Run On

Called

Methods

	Method	Description
	assert	Declares that the calling code can invoke an API that is protected by a permission. (Inherited from CodeAccessPermission.)
	cancelTimeOut	Cancels a previous method call to the setTimeOut method. (Inherited from Object.)
	copy	Creates and returns a copy of the current permission class object. (Overrides the copy Method.)
	demand	Checks the call stack to determine whether the permission that is required to invoke an API has been granted to the calling code. (Inherited from CodeAccessPermission.)
	equal	Determines whether the specified object is equal to the current one. (Inherited from Object.)
	getTimeOutTimerHandle	Returns the timer handle for the object. (Inherited from Object.)
	handle	Retrieves the handle of the class of the object. (Inherited from Object.)
	isSubsetOf	Determines whether a current permission is a subset of the specified permission. (Overrides the isSubsetOf Method.)
	new	Creates an new instance of the InteropPermission class. (Overrides the new Method.)
	notify	Releases the hold on an object that has called the wait method on this object. (Inherited from Object.)
	notifyAll	Releases a lock on the object that was issued by the wait method on this object. (Inherited from Object.)
	objectOnServer	Determines whether the object is on a server. (Inherited from Object.)
	owner	Returns the instance that owns the object. (Inherited from Object.)
	setTimeOut	Sets up the scheduled execution of a specified method. (Inherited from Object.)
	toString	Returns a string that represents the current object. (Inherited from Object.)
	usageCount	Returns the current number of references, that is, the value of the reference counter, that the object has. (Inherited from Object.)
	wait	Pauses a process. (Inherited from Object.)
	xml	Returns an XML string that represents the current object. (Inherited from Object.)

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Remarks

The InteropPermission class is designed to check permissions for specific APIs. For a list of all APIs protected by permissions, see Secured APIs.

You must call the assert method on the same tier, usually the server tier, that the corresponding CodeAccessPermission::demand method is called on before the protected API is executed. Call a method on the server tier from one of the following:

A server static method
A class instance method that is set to run on the server by using the RunOn class property

Examples

The following code example shows a new instance of the InteropPermission class. The assert method is called to declare that the code can then instantiate the DLL class that provides the ability to communicate with a MicrosoftWindows dynamic-link library (DLL).

server static void main(Args args) 
{ 
    InteropPermission _perm; 
    DLL _dll; 
 
    _perm = new InteropPermission(InteropKind::DllInterop); 
    _perm.assert(); 
  
    // Invoke the protected API. 
    _dll = new DLL('cfx2032.dll'); 
     
    // Optionally, call revertAssert() to limit the scope of assert. 
    CodeAccessPermission::revertAssert(); 
}

Inheritance Hierarchy

Object Class
CodeAccessPermission Class
InteropPermission Class

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