77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
#ifndef _DECTMON_UTILS_H
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#define _DECTMON_UTILS_H
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#include <assert.h>
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#include <stddef.h>
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#include <stdint.h>
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#define __init __attribute__((constructor))
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#define __exit __attribute__((destructor))
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#define __must_check __attribute__((warn_unused_result))
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#define __maybe_unused __attribute__((unused))
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#define __noreturn __attribute__((__noreturn__))
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#define __aligned(x) __attribute__((aligned(x)))
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#define __packed __attribute__((packed))
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#define __visible __attribute__((visibility("default")))
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#define BUG() assert(0)
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/* Force a compilation error if condition is true */
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#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
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#define BUILD_BUG_ON_ZERO(e) (sizeof(char[1 - 2 * !!(e)]) - 1)
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#define __must_be_array(a) \
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BUILD_BUG_ON_ZERO(__builtin_types_compatible_p(typeof(a), typeof(&a[0])))
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#define array_size(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
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#define field_sizeof(t, f) (sizeof(((t *)NULL)->f))
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#define div_round_up(n, d) (((n) + (d) - 1) / (d))
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#define min(x, y) ({ \
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typeof(x) _min1 = (x); \
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typeof(y) _min2 = (y); \
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(void) (&_min1 == &_min2); \
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_min1 < _min2 ? _min1 : _min2; })
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#define max(x, y) ({ \
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typeof(x) _max1 = (x); \
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typeof(y) _max2 = (y); \
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(void) (&_max1 == &_max2); \
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_max1 > _max2 ? _max1 : _max2; })
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static inline unsigned int fls(uint64_t v)
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{
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unsigned int len = 0;
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while (v) {
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v >>= 1;
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len++;
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}
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return len;
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}
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#define ptrlist_init(head) \
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do { \
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*(head) = NULL; \
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} while (0)
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#define ptrlist_add_tail(new, head) \
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do { \
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typeof(new) *pprev; \
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pprev = (head); \
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while (*pprev != NULL) \
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pprev = &(*pprev)->next; \
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*pprev = new; \
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} while (0)
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#define ptrlist_dequeue_head(head) \
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({ \
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typeof(*head) elem = *(head); \
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if (elem != NULL) \
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*(head) = elem->next; \
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elem; \
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})
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#endif /* _DECTMON_UTILS_H */
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