NTDLL: implement NtSignalAndWaitForSingleObject

[Robert Shearman]

Robert Shearman wrote:

> Mike McCormack wrote:
>
>>
>>> I think this is a little ugly. I'd prefer to see this code do a 
>>> switch on obj->ops and call the relevant function with the raw 
>>> object instead of a handle.
>>
>>
>>
>> I know it's ugly; I rewrote that bit three times, including once with 
>> an ops->signal() method.  Implementing a object operation requires 
>> that the 3 operations are consistent.  For example, the access flags 
>> required to perform must be consistent, so the get_handle_obj can be 
>> done only once.  Unfortunately, semaphores and event flags require 
>> different permissions to execute ops->signal().
>
>
> Ok, I see the problem now. The only alternative I can think of is to 
> try to open the object with the GENERIC_WRITE access right and 
> implement generic mappings for each object (these mappings are really 
> needed anyway for other situaitons).


Actually, I just thought about one more solution. You could open the 
object with using an access right of 0, meaning that anything is 
accepted, then check the access right manually. Still a bit of a kludge, 
but I think it is better than the brute force chaining.

Rob