C Library Wrapper in C++

[Ian]

Has anyone had any experience in writing wrappers for older C
libraries?
What I'm looking at doing is creating a wrapper C++ object as a front
end to an older C library, also the library is not thread-safe, which
I have to somehow make safe for multi-threading (CRITICAL_SECTI ONS
maybe) for integration into a server.

Thanks,

Ian
mc_ian@yahoo.co m

[Jack Klein]

Re: C Library Wrapper in C++

On 16 Oct 2003 14:12:08 -0700, mc_ian@yahoo.co m (Ian) wrote in
comp.lang.c++:
[color=blue]
> Has anyone had any experience in writing wrappers for older C
> libraries?[/color]

Yes, many people have.
[color=blue]
> What I'm looking at doing is creating a wrapper C++ object as a front
> end to an older C library, also the library is not thread-safe, which
> I have to somehow make safe for multi-threading (CRITICAL_SECTI ONS
> maybe) for integration into a server.
>
> Thanks,[/color]

The C++ language does not define or support multiple threads of
execution, so that aspect of your question is off-topic here. You
need to ask in a Windows programming group.

--
Jack Klein
Home: http://JK-Technology.Com
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[Alan Gifford]

Re: C Library Wrapper in C++

Jack Klein <jackklein@spam cop.net> wrote in message news:<clluovsvd 45us1bl7eh2qict bcbndqilul@4ax. com>...[color=blue]
> On 16 Oct 2003 14:12:08 -0700, mc_ian@yahoo.co m (Ian) wrote in
> comp.lang.c++:
>[color=green]
> > Has anyone had any experience in writing wrappers for older C
> > libraries?[/color]
>
> Yes, many people have.
>[color=green]
> > What I'm looking at doing is creating a wrapper C++ object as a front
> > end to an older C library, also the library is not thread-safe, which
> > I have to somehow make safe for multi-threading (CRITICAL_SECTI ONS
> > maybe) for integration into a server.
> >
> > Thanks,[/color]
>
> The C++ language does not define or support multiple threads of
> execution, so that aspect of your question is off-topic here. You
> need to ask in a Windows programming group.[/color]



So you mean you can't use multithreading with C++ programs in Linux?
A co-worker was telling me about using C++ classes to handle locks and
some other stuff in multithreading (I don't know how to do it yet)
that made it really easy, but I think he was talking about Windows NT
programming.

[red floyd]

Re: C Library Wrapper in C++

Alan Gifford wrote:[color=blue]
> Jack Klein <jackklein@spam cop.net> wrote in message news:<clluovsvd 45us1bl7eh2qict bcbndqilul@4ax. com>...
>[color=green]
>>On 16 Oct 2003 14:12:08 -0700, mc_ian@yahoo.co m (Ian) wrote in
>>comp.lang.c++ :
>>
>>[color=darkred]
>>>Has anyone had any experience in writing wrappers for older C
>>>libraries?[/color]
>>
>>Yes, many people have.
>>
>>[color=darkred]
>>>What I'm looking at doing is creating a wrapper C++ object as a front
>>>end to an older C library, also the library is not thread-safe, which
>>>I have to somehow make safe for multi-threading (CRITICAL_SECTI ONS
>>>maybe) for integration into a server.
>>>
>>>Thanks,[/color]
>>
>>The C++ language does not define or support multiple threads of
>>execution, so that aspect of your question is off-topic here. You
>>need to ask in a Windows programming group.[/color]
>
>
>
>
> So you mean you can't use multithreading with C++ programs in Linux?
> A co-worker was telling me about using C++ classes to handle locks and
> some other stuff in multithreading (I don't know how to do it yet)
> that made it really easy, but I think he was talking about Windows NT
> programming.[/color]

No, he means that it's not built into the Standard C++ language.
Wrappers and such for multithreading APIs are OS and/or MT
implementation specific, and are not discussed in the standard.

That said, I have several classes that wrap up some Win32 multithreading
primitives. They are implemented in Standard C++, but they are not part
of Standard C++.

C++ is a great language for this sort of wrapper, because it helps to
avoid problems such as mutexes and critical sections accidentally left
locked. But because they're OS specific, they're not in the standard.