/// <summary>
/// Retrieves the current delegate that is being called
/// </summary>
public static T GetCurrentCalleeDelegate <T>() where T : class // constraint can't be System.Delegate
{
//
// RH keeps track of the current thunk that is being called through a secret argument / thread
// statics. No matter how that's implemented, we get the current thunk which we can use for
// look up later
//
IntPtr pContext = RuntimeImports.GetCurrentInteropThunkContext();
Debug.Assert(pContext != null);
GCHandle handle;
unsafe
{
// Pull out Handle from context
handle = ((ThunkContextData *)pContext)->Handle;
}
T target = InteropExtensions.UncheckedCast <T>(handle.Target);
//
// The delegate might already been garbage collected
// User should use GC.KeepAlive or whatever ways necessary to keep the delegate alive
// until they are done with the native function pointer
//
if (target == null)
{
Environment.FailFast(SR.Delegate_GarbageCollected);
}
return(target);
}
internal static IntPtr GetCurrentCalleeOpenStaticDelegateFunctionPointer()
{
IntPtr pContext = RuntimeImports.GetCurrentInteropThunkContext();
Debug.Assert(pContext != null);
IntPtr fnPtr;
unsafe
{
// Pull out function pointer for open static delegate
fnPtr = (*((ThunkContextData *)pContext)).FunctionPtr;
// free the memory here
CoTaskMemFree((void *)pContext);
}
Debug.Assert(fnPtr != null);
return(fnPtr);
}
/// <summary>
/// Retrieves the function pointer for the current open static delegate that is being called
/// </summary>
public static IntPtr GetCurrentCalleeOpenStaticDelegateFunctionPointer()
{
//
// RH keeps track of the current thunk that is being called through a secret argument / thread
// statics. No matter how that's implemented, we get the current thunk which we can use for
// look up later
//
IntPtr pContext = RuntimeImports.GetCurrentInteropThunkContext();
Debug.Assert(pContext != null);
IntPtr fnPtr;
unsafe
{
// Pull out function pointer for open static delegate
fnPtr = ((ThunkContextData *)pContext)->FunctionPtr;
}
Debug.Assert(fnPtr != null);
return(fnPtr);
}
