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31 lines
1,010 B
C
31 lines
1,010 B
C
#ifndef _I386_BITOPS_H
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#define _I386_BITOPS_H
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/*
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* Copyright 1992, Linus Torvalds.
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*/
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/*
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* These have to be done with inline assembly: that way the bit-setting
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* is guaranteed to be atomic. All bit operations return 0 if the bit
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* was cleared before the operation and != 0 if it was not.
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*
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* bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1).
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*/
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/*
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* Function prototypes to keep gcc -Wall happy
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*/
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extern void set_bit(int nr, volatile void * addr);
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extern void clear_bit(int nr, volatile void * addr);
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extern void change_bit(int nr, volatile void * addr);
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extern int test_and_set_bit(int nr, volatile void * addr);
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extern int test_and_clear_bit(int nr, volatile void * addr);
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extern int test_and_change_bit(int nr, volatile void * addr);
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extern int test_bit(int nr, volatile void * addr);
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extern int find_first_zero_bit(void * addr, unsigned size);
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extern int find_next_zero_bit (void * addr, int size, int offset);
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extern unsigned long ffz(unsigned long word);
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#endif /* _I386_BITOPS_H */
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