New submission from Owen <j2.n...@gmail.com>:
OS: Windows 2003STD x64 en
I have try to call python method from c++ dll by "WINFUNCTYPE".
But the 4th parameter is always None or 0 if the type is int or void* (float is
works fine).
Following is the part of source code:
==code==========================================
import sys
from ctypes import *
windll.LoadLibrary("testPy2.dll")
#########################################
def
test3(param1,param2,param3,param4,param5,param6,param7,param8,param9,param10):
print("================")
print(param1)
print(param2)
print(param3)
# the 4th param4 is always 0.
print(param4)
print(param5)
print(param6)
print(param7)
print(param8)
print(param9)
print(param10)
print("================")
return 20
C_METHOD_TYPE4 = WINFUNCTYPE(c_int32, c_int32, c_int32, c_int32, c_int32,
c_int32, c_int32, c_int32, c_int32, c_int32, c_int32)
windll.testPy2.fntestPy7(9,C_METHOD_TYPE4(test3))
==code==========================================
To my knowledge, both visual c++ and gcc use registers for the first few
parameters, and then after that use the stack. Maybe this is the reason.
I have attached some simple codes for reproduce this issue.
issues
- testPy2 <- source code of the dll
- test.py <- python file to reproduce the issue
- testPy2.dll <- the dll to reproduce the issue
----------
components: Windows
files: issues.zip
messages: 116649
nosy: J2.NETe
priority: normal
severity: normal
status: open
title: The 4th parameter of method always None or 0 on x64 Windows.
versions: Python 2.7, Python 3.1
Added file: http://bugs.python.org/file18907/issues.zip
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue9884>
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