MSG_WAITALL Flag in D

Question

Is there a way to call receive() on a Socket with the MSG_WAITALL flag, in D? I checked the source but there does not appear to be an enum for it.

Answer 1

Looks like phobos doesn't define it, but druntime does, so you can cast the value to SocketFlags:

// on posix
import core.sys.posix.sys.socket;
receive(buffer, cast(SocketFlags) MSG_WAITALL);

// on windows
receive(buffer, cast(SocketFlags) 0x08 /* MSG_WAITALL, number found on msdn */);

this is a bit hackish, but if you look at the source, you can see the flags is just casted back to int when passed to the low level recv anyway, so it should work without a problem.