tools lib: Add bitmap_alloc function
Adding bitmap_alloc function to dynamically allocate bitmap. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20160802113302.GA7479@krava Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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tools/include/linux
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@ -3,6 +3,7 @@
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#include <string.h>
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#include <string.h>
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#include <linux/bitops.h>
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#include <linux/bitops.h>
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#include <stdlib.h>
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#define DECLARE_BITMAP(name,bits) \
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#define DECLARE_BITMAP(name,bits) \
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unsigned long name[BITS_TO_LONGS(bits)]
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unsigned long name[BITS_TO_LONGS(bits)]
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@ -65,4 +66,13 @@ static inline int test_and_set_bit(int nr, unsigned long *addr)
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return (old & mask) != 0;
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return (old & mask) != 0;
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}
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}
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/**
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* bitmap_alloc - Allocate bitmap
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* @nr: Bit to set
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*/
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static inline unsigned long *bitmap_alloc(int nbits)
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{
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return calloc(1, BITS_TO_LONGS(nbits) * sizeof(unsigned long));
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}
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#endif /* _PERF_BITOPS_H */
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#endif /* _PERF_BITOPS_H */
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