Method alloc

host/sysenv/sysenv.cpp:23–27

}

i32_t FdTable::alloc(int os_fd) {
    i32_t wfd = next_fd_++;
    table_[wfd] = FdEntry{os_fd, false, nullptr};
    return wfd;
}

i32_t FdTable::alloc_dir(std::shared_ptr<DirIter> dir) {
    i32_t wfd = next_fd_++;