git.oblomov.eu Git - linux-2.6/blob - arch/um/include/asm/system.h

   1 #ifndef __UM_SYSTEM_GENERIC_H
   2 #define __UM_SYSTEM_GENERIC_H
   3
   4 #include "sysdep/system.h"
   5
   6 extern void *switch_to(void *prev, void *next, void *last);
   7
   8 extern int get_signals(void);
   9 extern int set_signals(int enable);
  10 extern int get_signals(void);
  11 extern void block_signals(void);
  12 extern void unblock_signals(void);
  13
  14 #define local_save_flags(flags) do { typecheck(unsigned long, flags); \
  15                                      (flags) = get_signals(); } while(0)
  16 #define local_irq_restore(flags) do { typecheck(unsigned long, flags); \
  17                                       set_signals(flags); } while(0)
  18
  19 #define local_irq_save(flags) do { local_save_flags(flags); \
  20                                    local_irq_disable(); } while(0)
  21
  22 #define local_irq_enable() unblock_signals()
  23 #define local_irq_disable() block_signals()
  24
  25 #define irqs_disabled()                 \
  26 ({                                      \
  27         unsigned long flags;            \
  28         local_save_flags(flags);        \
  29         (flags == 0);                   \
  30 })
  31
  32 extern void *_switch_to(void *prev, void *next, void *last);
  33 #define switch_to(prev, next, last) prev = _switch_to(prev, next, last)
  34
  35 #endif