simple defer in C

defer

#define macro_var(name) name##__LINE__
#define defer(start, end) for ( \
  int macro_var(_i_) = (start, 0); \
  !macro_var(_i_); \
  (macro_var(_i_) += 1), end) \
 
 
 /**
  Example usage:
  
  defer(open(), close())
  {
    // other code.
  }
 **/