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| Related articles |
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| New Implementation of Virtual Functions in C++ sjmccaug@prairienet.org (1999-11-18) |
| Re: New Implementation of Virtual Functions in C++ johnmce@texas.net (1999-11-19) |
| Re: New Implementation of Virtual Functions in C++ neeri@iis.ee.ethz.ch (Matthias Neeracher) (1999-11-19) |
| Re: New Implementation of Virtual Functions in C++ landauer@apple.com (1999-11-19) |
| Re: New Implementation of Virtual Functions in C++ jsgray@acm.org (Jan Gray) (1999-11-23) |
| From: | johnmce@texas.net (John McEnerney) |
| Newsgroups: | comp.compilers |
| Date: | 19 Nov 1999 22:32:52 -0500 |
| Organization: | Compilers Central |
| References: | 99-11-100 |
| Keywords: | C++, code |
sjmccaug@prairienet.org (Scott J. McCaughrin) wrote:
> A colleague informs me that virtual functions are now more commonly
> implemented via thunks (instead of class vtbls). He couldn't cite a
> source for this. Can you?
Multiple Inheritance is now commonly implemented via thunks. This
allows the same vtable format to be used in both the single- and
multiple-inheritance cases. The thunk encodes the adjustment to the
'this' pointer that used to be part of the (original cfront) vtable
format.
--
John McEnerney (johnmce@texas.net)
[Ah, that makes sense, presuming you mean "function wrappers" rather than
thunks. -John]
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