arch/um/include/choose-mode.h

   1 /*
   2  * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #ifndef __CHOOSE_MODE_H__
   7 #define __CHOOSE_MODE_H__
   8
   9 #include "uml-config.h"
  10
  11 #if defined(UML_CONFIG_MODE_TT) && defined(UML_CONFIG_MODE_SKAS)
  12 #define CHOOSE_MODE(tt, skas) (mode_tt ? (tt) : (skas))
  13
  14 extern int mode_tt;
  15 static inline void *__choose_mode(void *tt, void *skas) {
  16         return mode_tt ? tt : skas;
  17 }
  18
  19 #define __CHOOSE_MODE(tt, skas) (*( (typeof(tt) *) __choose_mode(&(tt), &(skas))))
  20
  21 #elif defined(UML_CONFIG_MODE_SKAS)
  22 #define CHOOSE_MODE(tt, skas) (skas)
  23
  24 #elif defined(UML_CONFIG_MODE_TT)
  25 #define CHOOSE_MODE(tt, skas) (tt)
  26
  27 #else
  28 #error CONFIG_MODE_SKAS and CONFIG_MODE_TT are both disabled
  29 #endif
  30
  31 #define CHOOSE_MODE_PROC(tt, skas, args...) \
  32         CHOOSE_MODE(tt(args), skas(args))
  33
  34 #ifndef __CHOOSE_MODE
  35 #define __CHOOSE_MODE(tt, skas) CHOOSE_MODE(tt, skas)
  36 #endif
  37
  38 #endif