proc checked_resource(resource: int): cint {....raises: [ValueError], tags: [],
    forbids: [].}

proc getpagesize(): int {....raises: [], tags: [], forbids: [].}

proc getrlimit(resource: int): py_rlimit {....raises: [ValueError, PyOSError],
    tags: [], forbids: [].}

proc getrusage(who: int): struct_rusage {....raises: [ValueError, PyOSError],
    tags: [], forbids: [].}

proc prlimit(pid: int; resource: int): py_rlimit {.discardable,
    ...raises: [ValueError, PyOSError], tags: [], forbids: [].}

proc prlimit(pid: int; resource: int; limits: py_rlimit_abc): py_rlimit {.
    discardable.}

proc setrlimit(resource: int; limits: py_rlimit_abc)