tools/include/asm-generic/bitops/atomic.h

   1 #ifndef _TOOLS_LINUX_ASM_GENERIC_BITOPS_ATOMIC_H_
   2 #define _TOOLS_LINUX_ASM_GENERIC_BITOPS_ATOMIC_H_
   3
   4 #include <asm/types.h>
   5 #include <asm/bitsperlong.h>
   6
   7 static inline void set_bit(int nr, unsigned long *addr)
   8 {
   9         addr[nr / __BITS_PER_LONG] |= 1UL << (nr % __BITS_PER_LONG);
  10 }
  11
  12 static inline void clear_bit(int nr, unsigned long *addr)
  13 {
  14         addr[nr / __BITS_PER_LONG] &= ~(1UL << (nr % __BITS_PER_LONG));
  15 }
  16
  17 static __always_inline int test_bit(unsigned int nr, const unsigned long *addr)
  18 {
  19         return ((1UL << (nr % __BITS_PER_LONG)) &
  20                 (((unsigned long *)addr)[nr / __BITS_PER_LONG])) != 0;
  21 }
  22
  23 #endif /* _TOOLS_LINUX_ASM_GENERIC_BITOPS_ATOMIC_H_ */