Python在Windows和在Linux下调用动态链接库的教程

  #include "stdio.h"
  void display(char* msg){
    printf("%s\n",msg);
  }
   
  int add(int a,int b){
    return a+b;
  }

  #!/usr/bin/python
   
  from ctypes import *
  import os 
  //参数为生成的.so文件所在的绝对路径
  libtest = cdll.LoadLibrary(os.getcwd() + '/linuxany.so') 
  //直接用方法名进行调用
  print 
  libtest.display('Hello,I am linuxany.com') 
  print libtest.add(2,2010)

Hello,I am linuxany.com
2012 

import ctypes
dll = ctypes.windll.LoadLibrary( 'test.dll' )

import ctypes
dll = ctypes.WinDll( 'test.dll' )

import ctypes
dll = ctypes.cdll.LoadLibrary( 'test.dll' )
##注：一般在linux下为test.o文件，同样可以使用如下的方法：
## dll = ctypes.cdll.LoadLibrary('test.o')

import ctypes
dll = ctypes.CDll( 'test.dll' )

# define ADD_EXPORT Q_DECL_EXPORT
extern "C" ADD_EXPORT int addnum(int num1,int num2)
{
return num1+num2;
}


extern "C" ADD_EXPORT void get_path(char *path){
memcpy(path,"hello",sizeof("hello"));
}

dll=ctypes.CDLL("add.dll")
add=dll.addnum
add.argtypes=[ctypes.c_int,ctypes.c_int] #参数类型
add.restypes=ctypes.c_int            #返回值类型
print add(1,2)


get_path=dll.get_path
get_path.argtypes=[ctypes.c_char_p]
path=create_string_buffer(100)
get_path(path)
print path.value

GetSystemDirectory = windll.kernel32.GetSystemDirectoryA
buf = create_string_buffer(100)
GetSystemDirectory(buf,100)
print buf.value
MessageBox = windll.user32.MessageBoxW
MessageBox(None, u"Hello World", u"Hi", 0)