Signals and Slots

[Walter Bright]

Sean Kelly wrote:
> Walter Bright wrote:
>> http://www.digitalmars.com/d/std_signals.html
>>
>> And that, hopefully, is that.
> 
> Nice work!  In skimming the code, one thing jumped out at me:
> 
> signals.d:171: len += len + 4;
> 
> I think this should be: len += 4;
> 
> Or actually: len += (void*).sizeof;

No, that is as intended. It's using a power of 2 allocation method. 
Also, the sizeof thing is taken care of by the call to calloc/realloc.

> To be 64-bit safe.  Finally, is there any reason to use _d_toObject in 
> this code instead of cast(Object)?  I'd think they would do the same thing?

Not exactly. cast(Object)p won't do the pointer adjustment if the type 
of p is a void*. To convert an interface to its underlying Object, the 
cast implementation needs to know what the interface type is.