LXR linux/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
   7static inline void set_bit(int nr, unsigned long *addr)
   8{
   9        addr[nr / __BITS_PER_LONG] |= 1UL << (nr % __BITS_PER_LONG);
  10}
  11
  12static inline void clear_bit(int nr, unsigned long *addr)
  13{
  14        addr[nr / __BITS_PER_LONG] &= ~(1UL << (nr % __BITS_PER_LONG));
  15}
  16
  17static __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_ */
  24