Hi All,
First, let me say that PyPy just rocked my world. I develop an
auto-update framework for frozen python applications [1] and have
started using PyPy to compile parts of the app into stand-alone
executables. I got it up and running in under two days, and it shaves
several MB off the size of my frozen apps - so thanks for some awesome
tech!
I'm currently using libffi to dynamically find and load a python DLL
from within an RPython program. It works well but the code seems very
verbose to someone who's used to working with ctypes. I'm hoping
there's a better way...
Here's a trimmed-down example of the sort of thing I'm doing::
import ctypes.util
libpython = ctypes.util.find_library("python2.6")
from pypy.rlib.libffi import *
from pypy.rpython.lltypesystem import rffi, lltype
def target(*args):
def entry_point(argv):
# Find the python DLL and extract needed functions
py = CDLL(libpython)
Py_Initialize = py.getpointer("Py_Initialize",[],ffi_type_void)
Py_Finalize = py.getpointer("Py_Finalize",[],ffi_type_void)
PyRun_SimpleString =
py.getpointer("PyRun_SimpleString",[ffi_type_pointer],ffi_type_sint)
# Bootstrap into running a python program
Py_Initialize.call(lltype.Void)
buf = rffi.str2charp("print 'hello from python!'")
PyRun_SimpleString.push_arg(buf)
PyRun_SimpleString.call(rffi.INT)
rffi.free_charp(buf)
Py_Finalize.call(lltype.Void)
return 0
return entry_point,None
As you can imagine, the real application has a lot more of these
boilerplate declarations. Any suggestions on how to do this in
less/cleaner code?
Thanks,
Ryan
[1] http://pypi.python.org/pypi/esky/
--
Ryan Kelly
http://www.rfk.id.au | This message is digitally signed. Please visit
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