ctypes 函數指針變量

函數指針作爲參數賦值

• 案例

  #include<stdio.h>
  void show() {
     printf("%s\n",__FUNCTION__);
  }
  
  void cool(void(**s)()){
     *s = &show;
  }
  ~
  
  

  • 賦值的是show

• 文件名編譯

  • gcc -fPIC --shared test.c -o test.so

python

• 代碼

  import ctypes
  VOID_T = ctypes.CFUNCTYPE(None)
  t = VOID_T()
  
  handle=ctypes.CDLL("./test.so")
  handle.cool.argtypes=[ctypes.POINTER(VOID_T)]
  handle.cool(ctypes.pointer(t))
  t()
  
  

• 執行

  • 輸出函數名show.