reactos/drivers/fs/minix/bitops.h

   1 #ifndef _I386_BITOPS_H
   2 #define _I386_BITOPS_H
   3
   4 /*
   5  * Copyright 1992, Linus Torvalds.
   6  */
   7
   8 /*
   9  * These have to be done with inline assembly: that way the bit-setting
  10  * is guaranteed to be atomic. All bit operations return 0 if the bit
  11  * was cleared before the operation and != 0 if it was not.
  12  *
  13  * bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1).
  14  */
  15
  16 /*
  17  * Function prototypes to keep gcc -Wall happy
  18  */
  19 extern void set_bit(int nr, volatile void * addr);
  20 extern void clear_bit(int nr, volatile void * addr);
  21 extern void change_bit(int nr, volatile void * addr);
  22 extern int test_and_set_bit(int nr, volatile void * addr);
  23 extern int test_and_clear_bit(int nr, volatile void * addr);
  24 extern int test_and_change_bit(int nr, volatile void * addr);
  25 extern int test_bit(int nr, volatile void * addr);
  26 extern int find_first_zero_bit(void * addr, unsigned size);
  27 extern int find_next_zero_bit (void * addr, int size, int offset);
  28 extern unsigned long ffz(unsigned long word);
  29
  30 #endif /* _I386_BITOPS_H */