from rpython.rlib import _rffi_stacklet as _c

from rpython.rlib import debug

from rpython.rlib.objectmodel import we_are_translated, specialize

from rpython.rtyper.annlowlevel import llhelper

class StackletGcRootFinder(object):

@staticmethod

@specialize.arg(1)

def new(thrd, callback, arg):

h = _c.new(thrd._thrd, llhelper(_c.run_fn, callback), arg)

if not h:

raise MemoryError

return h

@staticmethod

def switch(h):

h = _c.switch(h)

if not h:

raise MemoryError

return h

@staticmethod

def destroy(thrd, h):

_c.destroy(thrd._thrd, h)

if we_are_translated():

debug.debug_print("not using a framework GC: "

"stacklet_destroy() may leak")

is_empty_handle = staticmethod(_c.is_empty_handle)

@staticmethod

def get_null_handle():

return _c.null_handle

gcrootfinder = StackletGcRootFinder # class object