ole32: implement CoGetCallContext and CoSwitchCallContext

[Rob Shearman]

2008/11/30 Austin English <austinenglish at gmail.com>:
> +    if( !ppv)
> +        return E_INVALIDARG;
> +
> +    /* get COM tls */
> +    info = COM_CurrentInfo();
> +    if( !info)

Please try to keep the style consistent here. The style that the rest
of the file uses is a space after the "if" and no space inside the
brackets.

> +        return E_OUTOFMEMORY;
> +
> +    hr = RPC_E_CALL_COMPLETE;
> +    if( info->ctx_call)
> +    {
> +        hr = IUnknown_QueryInterface( info->ctx_call, riid, ppv);
> +    }
> +
> +    if (FAILED(hr))

...

> +    /* Receives a pointer to the call context object of the call currently
> +       in progress. This value is returned so that the original call context
> +       can be restored by the custom marshaller.
> +       The returned pointer will be NULL if there was no call in progress. */
> +    *ppOldObject = info->ctx_call;
> +
> +    /* It may be NULL if you are calling CoSwitchCallContext to switch back
> +       to the original call context and there was no original call context. */
> +    info->ctx_call = pNewObject;

You don't take a reference to the object that is passed-in. This is
against COM semantics and so requires a test case to prove that this
is indeed what the function does.

-- 
Rob Shearman