Re: [boost] [asio] WSASend needs reinterpret_cast<WSAOVERLAPPED*>.

From: Christopher Kohlhoff (chris_at_[hidden])
Date: 2006-06-26 01:30:36

Hi Felipe,

Felipe Magno de Almeida <felipe.m.almeida_at_[hidden]> wrote:
> The VC7.1 complains that win_iocp_operation cant be converted
> to WSAOVERLAPPED when tried to pass it to WSASend.
> I inserted this on win_iocp_socket_service.hpp:526
>
> - &bytes_transferred, flags, ptr.get(), 0);
> +&bytes_transferred, flags,
> reinterpret_cast<LPWSAOVERLAPPED>(static_cast<LPOVERLAPPED>(ptr.get())),
> 0);
>
> And it worked here.

Actually the problem is a missing define for WIN32. Newer
Platform SDKs (like the one I use) automatically #define WIN32
for you in WinDef.h, but the one shipped with VC7.1 does not. If
WIN32 is not defined, Winsock2.h assumes you are compiling for
16-bit Windows (!) and redefines the WSAOVERLAPPED structure
instead of just making it a typedef for OVERLAPPED.

You can work around the problem by adding the WIN32 definition
to your makefile/Jamfile/project settings. I have made a change
to asio/detail/socket_types.hpp in asio's CVS repository to
automatically define it, and will merge the change over to Boost
CVS soon.

Cheers,
Chris