FastLED Platform: win

Windows‑specific networking helpers.

Files (quick pass)

• socket_win.h: Normalizes POSIX‑style socket API on Windows (Winsock2). Provides typedefs, constants, and wrappers (socket/bind/connect/...) plus init/teardown helpers.
• socket_win.cpp: Implementation.

Behavior and constraints

• Requires Winsock initialization (e.g., WSAStartup via helper) and cleanup; wraps errors to POSIX‑like errno values (e.g., EWOULDBLOCK).
• Mirrors POSIX calls for cross‑platform code while respecting Windows differences (e.g., closesocket vs close).

Winsock initialization sequence

Before using any socket functions on Windows:

1. Call fl::win::socket_init() (wrapper around WSAStartup).
2. Use the POSIX‑style wrappers (socket/bind/connect/send/recv, etc.).
3. On shutdown, call fl::win::socket_cleanup() (wrapper around WSACleanup).

Limitations vs POSIX:

• File descriptors are not interchangeable with CRT file handles; always use closesocket() (wrapped) rather than close().
• Non‑blocking and error codes map to POSIX‑like values, but not all errno values are identical. Check for EWOULDBLOCK/EINPROGRESS via wrapper helpers.