“拥有 SUC”是什么意思？

Question

我正在阅读一些 .NET 代码，我在 DispatcherSynchronizationContext

中发现了以下内容

/// 
///     Wait for a set of handles.
/// 
///  
///     Critical - Calls WaitForMultipleObjectsEx which has a SUC.
///  
[SecurityCritical] 
[SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.ControlPolicy|SecurityPermissionFlag.ControlEvidence)]
public override int Wait(IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout) 
{
    if(_dispatcher._disableProcessingCount > 0)
    {
        // Call into native code directly in order to avoid the default 
        // CLR locking behavior which pumps messages under contention.
        // Even though they try to pump only the COM messages, any 
        // messages that have been SENT to the window are also 
        // dispatched.  This can lead to unpredictable reentrancy.
        return MS.Win32.UnsafeNativeMethods.WaitForMultipleObjectsEx(waitHandles.Length, waitHandles, waitAll, millisecondsTimeout, false); 
    }
    else
    {
        return SynchronizationContext.WaitHelper(waitHandles, waitAll, millisecondsTimeout); 
    }
} 

“拥有 SUC”是什么意思？

Answer 1

它似乎代表

SuppressUnmanagedCodeSecurity

属性。请参阅源代码了解

WaitForMultipleObjectsEx

///<SecurityNote>
/// Critical as this code performs an elevation.
///</SecurityNote>
[SecurityCritical]
[SuppressUnmanagedCodeSecurity]
[DllImport(ExternDll.Kernel32, EntryPoint="WaitForMultipleObjectsEx", SetLastError = true, CharSet = CharSet.Auto)]
private static extern int IntWaitForMultipleObjectsEx(int nCount, IntPtr[] pHandles, bool bWaitAll, int dwMilliseconds, bool bAlertable);