Function send_all

src/ui/httpd.c:189–215

}

static int send_all(cbm_http_conn_t *connection, const void *data, size_t len, int64_t deadline) {
    const char *p = data;
    size_t off = 0;
    while (off < len) {
        if (wait_connection_ready(connection, true, deadline) != 1)
            return -1;
        size_t available = len - off;
        /* Bounded slices: a single nonblocking send() on Windows is absorbed
         * wholesale into AFD kernel buffers regardless of SO_SNDBUF, so one
         * giant call can never observe backpressure (and pins its full size
         * in nonpaged pool). Slicing keeps absorption bounded by the send
         * buffer so a non-reading peer hits EWOULDBLOCK deterministically. */
        if (available > CBM_HTTP_SEND_SLICE_BYTES)
            available = CBM_HTTP_SEND_SLICE_BYTES;
#ifdef _WIN32
        int n = send(connection->fd, p + off, (int)available, CBM_SEND_FLAGS);
#else
        ssize_t n = send(connection->fd, p + off, available, CBM_SEND_FLAGS);
#endif
        if (n < 0 && socket_would_block())
            continue;
        if (n <= 0)
            return -1;
        off += (size_t)n;
    }
    return 0;
}

/* ── Listener ─────────────────────────────────────────────────── */