TcpConnectionState.handlePrepare

void handlePrepare(ref EventLoop loop, Token token) @trusted nothrow

Handle prepare phase callback from the event loop.

This callback is invoked before each poll operation, allowing us to check for completed overlapped I/O operations. We use GetOverlappedResult with bWait=false to poll without blocking.

Parameters

`loop`	The event loop that triggered the prepare callback.
`token`	The prepare token associated with this connection.