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chriskohlhoff / asio

Asio C++ Library
http://think-async.com/Asio
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MS-DOS compatibility #1324

Open jwt27 opened 1 year ago

jwt27 commented 1 year ago

This small patch will make asio compile for 32-bit DOS (djgpp), with the Watt32 socket library.

Some IPV6 option macros are missing, I don't know exactly how complete the ipv6 implementation is. Defining those to 0 gets it to compile, but using them will of course do nothing.

I tried some of the example programs. They compiled with no warnings, and seem to run fine.

jwt27 commented 1 year ago

I did discover a bug in libc that prevents ioctl() arguments from being passed through to the socket library. So the workaround is to use ioctlsocket(), but it takes a char*, so requires extra casts.

I sent in a patch to the mailing list. If that gets picked up soon then I might drop the last commit, since it just adds extra clutter.

This also uncovered a bug/quirk in the way the socket library handles a non-blocking connect(). Working on a PR for that now.

jwt27 commented 1 year ago

Better solution: ioctlsocket() now takes a void* argument, so there's no need for extra casts (ref: https://github.com/gvanem/Watt-32/pull/81).

The issue with non-blocking connect() also got fixed (ref: https://github.com/gvanem/Watt-32/pull/80).