nx_io_v1.nx

io.nx -- epoll-based non-blocking event loop (Phase G3). Research / reference: Linux epoll (2.5.45, 2002) — the scalable alternative to select and poll. Watches thousands of fds in O(1) per ready event. Nginx / redis / node.js all run on this model. Sovereignty: direct epoll_create1 / epoll_ctl / epoll_wait syscalls. No libev, no libuv, no glibc epoll wrapper. The same API works on NishiOS once its equivalent interrupt-dispatched ready-queue ships. Pattern for single-threaded server on this loop: let ep: i64 = io_epoll_new() io_epoll_add(ep, listen_fd, IO_READ) let evs: *IoEvent = io_events_alloc(64) while serving { let n: i64 = io_wait(ep, evs, 64, -1) var i: i64 = 0 while i < n { let e: *IoEvent = io_event_at(evs, i) handle(e.fd, e.events) i = i + 1 } } Syscalls (Linux RV64): 20 epoll_create1 21 epoll_ctl 22 epoll_pwait Event masks (subset we support): EPOLLIN = 0x001 — readable EPOLLOUT = 0x004 — writable EPOLLHUP = 0x010 — peer hangup EPOLLET = 0x80000000 — edge-triggered (uint32 bit 31)