[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v1 COLO Pre 03/12] tools/libxc: export xc_bitops.h
When we are under COLO, we will send dirty page bitmap info from secondary to primary at every checkpoint. So we need to get/test the dirty page bitmap. We just expose xc_bitops.h for libxl use. NOTE: Need to make clean and rerun configure to get it compiled. Signed-off-by: Yang Hongyang <yanghy@xxxxxxxxxxxxxx> --- tools/libxc/include/xc_bitops.h | 76 +++++++++++++++++++++++++++++++++++++++++ tools/libxc/xc_bitops.h | 76 ----------------------------------------- 2 files changed, 76 insertions(+), 76 deletions(-) create mode 100644 tools/libxc/include/xc_bitops.h delete mode 100644 tools/libxc/xc_bitops.h diff --git a/tools/libxc/include/xc_bitops.h b/tools/libxc/include/xc_bitops.h new file mode 100644 index 0000000..cd749f4 --- /dev/null +++ b/tools/libxc/include/xc_bitops.h @@ -0,0 +1,76 @@ +#ifndef XC_BITOPS_H +#define XC_BITOPS_H 1 + +/* bitmap operations for single threaded access */ + +#include <stdlib.h> +#include <string.h> + +#define BITS_PER_LONG (sizeof(unsigned long) * 8) +#define ORDER_LONG (sizeof(unsigned long) == 4 ? 5 : 6) + +#define BITMAP_ENTRY(_nr,_bmap) ((_bmap))[(_nr)/BITS_PER_LONG] +#define BITMAP_SHIFT(_nr) ((_nr) % BITS_PER_LONG) + +/* calculate required space for number of longs needed to hold nr_bits */ +static inline int bitmap_size(int nr_bits) +{ + int nr_long, nr_bytes; + nr_long = (nr_bits + BITS_PER_LONG - 1) >> ORDER_LONG; + nr_bytes = nr_long * sizeof(unsigned long); + return nr_bytes; +} + +static inline unsigned long *bitmap_alloc(int nr_bits) +{ + return calloc(1, bitmap_size(nr_bits)); +} + +static inline void bitmap_set(unsigned long *addr, int nr_bits) +{ + memset(addr, 0xff, bitmap_size(nr_bits)); +} + +static inline void bitmap_clear(unsigned long *addr, int nr_bits) +{ + memset(addr, 0, bitmap_size(nr_bits)); +} + +static inline int test_bit(int nr, unsigned long *addr) +{ + return (BITMAP_ENTRY(nr, addr) >> BITMAP_SHIFT(nr)) & 1; +} + +static inline void clear_bit(int nr, unsigned long *addr) +{ + BITMAP_ENTRY(nr, addr) &= ~(1UL << BITMAP_SHIFT(nr)); +} + +static inline void set_bit(int nr, unsigned long *addr) +{ + BITMAP_ENTRY(nr, addr) |= (1UL << BITMAP_SHIFT(nr)); +} + +static inline int test_and_clear_bit(int nr, unsigned long *addr) +{ + int oldbit = test_bit(nr, addr); + clear_bit(nr, addr); + return oldbit; +} + +static inline int test_and_set_bit(int nr, unsigned long *addr) +{ + int oldbit = test_bit(nr, addr); + set_bit(nr, addr); + return oldbit; +} + +static inline void bitmap_or(unsigned long *dst, const unsigned long *other, + int nr_bits) +{ + int i, nr_longs = (bitmap_size(nr_bits) / sizeof(unsigned long)); + for ( i = 0; i < nr_longs; ++i ) + dst[i] |= other[i]; +} + +#endif /* XC_BITOPS_H */ diff --git a/tools/libxc/xc_bitops.h b/tools/libxc/xc_bitops.h deleted file mode 100644 index cd749f4..0000000 --- a/tools/libxc/xc_bitops.h +++ /dev/null @@ -1,76 +0,0 @@ -#ifndef XC_BITOPS_H -#define XC_BITOPS_H 1 - -/* bitmap operations for single threaded access */ - -#include <stdlib.h> -#include <string.h> - -#define BITS_PER_LONG (sizeof(unsigned long) * 8) -#define ORDER_LONG (sizeof(unsigned long) == 4 ? 5 : 6) - -#define BITMAP_ENTRY(_nr,_bmap) ((_bmap))[(_nr)/BITS_PER_LONG] -#define BITMAP_SHIFT(_nr) ((_nr) % BITS_PER_LONG) - -/* calculate required space for number of longs needed to hold nr_bits */ -static inline int bitmap_size(int nr_bits) -{ - int nr_long, nr_bytes; - nr_long = (nr_bits + BITS_PER_LONG - 1) >> ORDER_LONG; - nr_bytes = nr_long * sizeof(unsigned long); - return nr_bytes; -} - -static inline unsigned long *bitmap_alloc(int nr_bits) -{ - return calloc(1, bitmap_size(nr_bits)); -} - -static inline void bitmap_set(unsigned long *addr, int nr_bits) -{ - memset(addr, 0xff, bitmap_size(nr_bits)); -} - -static inline void bitmap_clear(unsigned long *addr, int nr_bits) -{ - memset(addr, 0, bitmap_size(nr_bits)); -} - -static inline int test_bit(int nr, unsigned long *addr) -{ - return (BITMAP_ENTRY(nr, addr) >> BITMAP_SHIFT(nr)) & 1; -} - -static inline void clear_bit(int nr, unsigned long *addr) -{ - BITMAP_ENTRY(nr, addr) &= ~(1UL << BITMAP_SHIFT(nr)); -} - -static inline void set_bit(int nr, unsigned long *addr) -{ - BITMAP_ENTRY(nr, addr) |= (1UL << BITMAP_SHIFT(nr)); -} - -static inline int test_and_clear_bit(int nr, unsigned long *addr) -{ - int oldbit = test_bit(nr, addr); - clear_bit(nr, addr); - return oldbit; -} - -static inline int test_and_set_bit(int nr, unsigned long *addr) -{ - int oldbit = test_bit(nr, addr); - set_bit(nr, addr); - return oldbit; -} - -static inline void bitmap_or(unsigned long *dst, const unsigned long *other, - int nr_bits) -{ - int i, nr_longs = (bitmap_size(nr_bits) / sizeof(unsigned long)); - for ( i = 0; i < nr_longs; ++i ) - dst[i] |= other[i]; -} - -#endif /* XC_BITOPS_H */ -- 1.9.1 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
|
Lists.xenproject.org is hosted with RackSpace, monitoring our |