Subversion Repositories Kolibri OS

Rev

Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | Download | RSS feed

  1. #ifndef _ASM_GENERIC_BITOPS_FIND_H_
  2. #define _ASM_GENERIC_BITOPS_FIND_H_
  3.  
  4. #ifndef find_next_bit
  5. /**
  6.  * find_next_bit - find the next set bit in a memory region
  7.  * @addr: The address to base the search on
  8.  * @offset: The bitnumber to start searching at
  9.  * @size: The bitmap size in bits
  10.  *
  11.  * Returns the bit number for the next set bit
  12.  * If no bits are set, returns @size.
  13.  */
  14. extern unsigned long find_next_bit(const unsigned long *addr, unsigned long
  15.                 size, unsigned long offset);
  16. #endif
  17.  
  18. #ifndef find_next_zero_bit
  19. /**
  20.  * find_next_zero_bit - find the next cleared bit in a memory region
  21.  * @addr: The address to base the search on
  22.  * @offset: The bitnumber to start searching at
  23.  * @size: The bitmap size in bits
  24.  *
  25.  * Returns the bit number of the next zero bit
  26.  * If no bits are zero, returns @size.
  27.  */
  28. extern unsigned long find_next_zero_bit(const unsigned long *addr, unsigned
  29.                 long size, unsigned long offset);
  30. #endif
  31.  
  32. #ifdef CONFIG_GENERIC_FIND_FIRST_BIT
  33.  
  34. /**
  35.  * find_first_bit - find the first set bit in a memory region
  36.  * @addr: The address to start the search at
  37.  * @size: The maximum number of bits to search
  38.  *
  39.  * Returns the bit number of the first set bit.
  40.  * If no bits are set, returns @size.
  41.  */
  42. extern unsigned long find_first_bit(const unsigned long *addr,
  43.                                     unsigned long size);
  44.  
  45. /**
  46.  * find_first_zero_bit - find the first cleared bit in a memory region
  47.  * @addr: The address to start the search at
  48.  * @size: The maximum number of bits to search
  49.  *
  50.  * Returns the bit number of the first cleared bit.
  51.  * If no bits are zero, returns @size.
  52.  */
  53. extern unsigned long find_first_zero_bit(const unsigned long *addr,
  54.                                          unsigned long size);
  55. #else /* CONFIG_GENERIC_FIND_FIRST_BIT */
  56.  
  57. #define find_first_bit(addr, size) find_next_bit((addr), (size), 0)
  58. #define find_first_zero_bit(addr, size) find_next_zero_bit((addr), (size), 0)
  59.  
  60. #endif /* CONFIG_GENERIC_FIND_FIRST_BIT */
  61.  
  62. #endif /*_ASM_GENERIC_BITOPS_FIND_H_ */
  63.