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# Copyright (c) 2007 Chris AtLee <chris@atlee.ca>
# This file is part of GlusterFS.
#
# GlusterFS is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published
# by the Free Software Foundation; either version 3 of the License,
# or (at your option) any later version.
#
# GlusterFS is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see
# <http://www.gnu.org/licenses/>.
from ctypes import *
from glustertypes import *
libc = CDLL("libc.so.6")
calloc = libc.calloc
calloc.argtypes = [c_int, c_int]
calloc.restype = c_void_p
# TODO: Can these be done in C somehow?
def stack_wind(frame, rfn, obj, fn, *params):
"""Frame is a frame object"""
_new = cast(calloc(1, sizeof(call_frame_t)), POINTER(call_frame_t))
_new[0].root = frame.root
_new[0].next = frame.root[0].frames.next
_new[0].prev = pointer(frame.root[0].frames)
if frame.root[0].frames.next:
frame.root[0].frames.next[0].prev = _new
frame.root[0].frames.next = _new
_new[0].this = obj
# TODO: Type checking like tmp_cbk?
_new[0].ret = rfn
_new[0].parent = pointer(frame)
_new[0].cookie = cast(_new, c_void_p)
# TODO: Initialize lock
#_new.lock.init()
frame.ref_count += 1
fn(_new, obj, *params)
def stack_unwind(frame, *params):
"""Frame is a frame object"""
fn = frame[0].ret
parent = frame[0].parent[0]
parent.ref_count -= 1
op_ret = params[0]
op_err = params[1]
params = params[2:]
fn(parent, call_frame_t.from_address(frame[0].cookie), parent.this,
op_ret, op_err, *params)
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