release/src-rt-6.x.4708/linux/linux-2.6.36/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 int get_signals(void);
   7 extern int set_signals(int enable);
   8 extern void block_signals(void);
   9 extern void unblock_signals(void);
  10
  11 #define local_save_flags(flags) do { typecheck(unsigned long, flags); \
  12                                      (flags) = get_signals(); } while(0)
  13 #define local_irq_restore(flags) do { typecheck(unsigned long, flags); \
  14                                       set_signals(flags); } while(0)
  15
  16 #define local_irq_save(flags) do { local_save_flags(flags); \
  17                                    local_irq_disable(); } while(0)
  18
  19 #define local_irq_enable() unblock_signals()
  20 #define local_irq_disable() block_signals()
  21
  22 #define irqs_disabled()                 \
  23 ({                                      \
  24         unsigned long flags;            \
  25         local_save_flags(flags);        \
  26         (flags == 0);                   \
  27 })
  28
  29 extern void *_switch_to(void *prev, void *next, void *last);
  30 #define switch_to(prev, next, last) prev = _switch_to(prev, next, last)
  31
  32 #endif