home *** CD-ROM | disk | FTP | other *** search
- /* $Id: bitops.h,v 1.2 2002/04/26 23:09:18 smilcke Exp $ */
-
- #ifndef _I386_BITOPS_H
- #define _I386_BITOPS_H
-
- /*
- * Copyright 1992, Linus Torvalds.
- */
-
- /*
- * These have to be done with inline assembly: that way the bit-setting
- * is guaranteed to be atomic. All bit operations return 0 if the bit
- * was cleared before the operation and != 0 if it was not.
- *
- * bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1).
- */
-
- /*
- * Function prototypes to keep gcc -Wall happy
- */
- extern void set_bit(int nr, volatile void * addr);
- extern void clear_bit(int nr, volatile void * addr);
- extern void change_bit(int nr, volatile void * addr);
- extern int test_and_set_bit(int nr, volatile void * addr);
- extern int test_and_clear_bit(int nr, volatile void * addr);
- extern int test_and_change_bit(int nr, volatile void * addr);
- extern int __constant_test_bit(int nr, const volatile void * addr);
- extern int __test_bit(int nr, volatile void * addr);
- extern int find_first_zero_bit(void * addr, unsigned size);
- extern int find_next_zero_bit (void * addr, int size, int offset);
- extern unsigned long ffz(unsigned long word);
-
- #endif /* _I386_BITOPS_H */
-