Hi,

我把swig自带的callback例子做了个修改，发现运行有错，请大家帮忙看下。

原来的callback例子是能编译通过并正常运行的，唯一的改动就是给回调函数加了个参数。下面是全部的代码：

// ================== example.h
#include 
#include 

class Callback {
public:
       virtual ~Callback() { std::cout << "Callback::~Callback()" <<
std:: endl; }
       // virtual void run() { std::cout << "Callback::run()" << std::endl; }
       virtual void run(int* pn) { std::cout << "Callback::run()" << (*pn)
<< std::endl; }
};


class Caller {
private:
       Callback *_callback;
public:
       Caller(): _callback(0) {}
       ~Caller() { delCallback(); }
       void delCallback() { delete _callback; _callback = 0; }
       void setCallback(Callback *cb) { delCallback(); _callback = cb; }
       // void call() { if (_callback) _callback->run(); }
       void call()
   {
       if (_callback)
       {
           int i = 90;
           _callback->run(&i;);
       }
   }
};


// ================== example.cxx
#include "example.h"


// ================== example.i
%module(directors="1") example
%{
#include "example.h"
%}

%include "std_string.i"

%feature("director") Callback;

%include "example.h"


@rem ================== build.bat
@rem I compile my code with this bat file
set FILENAME=example

call "D:\program\Microsoft Visual Studio 8\VC\bin\vcvars32"
swig -c++ -python %FILENAME%.i

cl -c %FILENAME%_wrap.cxx -ID:\program\Python25\include\

link /subsystem:windows /LIBPATH:D:\program\Python25\libs\
%FILENAME%_wrap.obj /dll /OUT:_%FILENAME%.pyd


#===================================================
# file: runme.py
# you can test the wrapper with this script

import example

class PyCallback(example.Callback):
   def __init__(self):
       example.Callback.__init__(self)
   def run(self, i):
       print "PyCallback.run()", i

# Create an Caller instance

caller = example.Caller()

# Add a simple C++ callback (caller owns the callback, so
# we disown it first by clearing the .thisown flag).

print "Adding and calling a normal C++ callback"
print "----------------------------------------"

callback = example.Callback()
callback.thisown = 0
caller.setCallback(callback)
caller.call()
caller.delCallback();

print
print "Adding and calling a Python callback"
print "------------------------------------"

# Add a Python callback (caller owns the callback, so we
# disown it first by calling __disown__).

caller.setCallback(PyCallback().__disown__())
caller.call()
caller.delCallback()

print
print "Adding and calling another Python callback"
print "------------------------------------------"

# Lets do the same but use the weak reference this time.

callback = PyCallback().__disown__()
caller.setCallback(callback)
caller.call()
caller.delCallback()

# All done.

print
print "python exit"


在命令行上运行：
E:\test>runme.py
Adding and calling a normal C++ callback
----------------------------------------
Callback::run()90
Callback::~Callback()

Adding and calling a Python callback
------------------------------------
PyCallback.run()

然后出错对话框弹出来说"python.exe遇到问题需要关闭。我们对此引起的不便表示抱歉。"