mirror of
https://github.com/nilfs-dev/nilfs-utils.git
synced 2026-01-26 13:43:15 +00:00
7948e6bab5
Replace __u64, __u32, __u8, __s64, and __s32 with standard uint64_t, uint32_t, uint8_t, int64_t and int32_t types, respectively, except for nilfs2_api.h and nilfs2_ondisk.h. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
/*
|
|
* util.h - utility definitions
|
|
*/
|
|
#ifndef __UTIL_H__
|
|
#define __UTIL_H__
|
|
|
|
#include <assert.h>
|
|
#include <stdint.h> /* uint64_t, int64_t */
|
|
#include <stddef.h> /* offsetof() */
|
|
#include <stdlib.h>
|
|
#include "compat.h"
|
|
|
|
/* likely() and unlikely() macros */
|
|
#define likely(x) __builtin_expect(!!(x), 1)
|
|
#define unlikely(x) __builtin_expect(!!(x), 0)
|
|
|
|
#ifndef BUG
|
|
#define BUG() abort()
|
|
#endif
|
|
|
|
#define BUG_ON(x) assert(!(x))
|
|
/* Force a compilation error if the condition is true */
|
|
#define BUILD_BUG_ON(condition) ((void)sizeof(struct { int: -!!(condition); }))
|
|
|
|
#define typecheck(type, x) \
|
|
({ \
|
|
type __dummy; \
|
|
typeof(x) __dummy2; \
|
|
(void)(&__dummy == &__dummy2); \
|
|
1; \
|
|
})
|
|
|
|
#define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)
|
|
|
|
#define DIV_ROUND_UP(n, m) (((n) + (m) - 1) / (m))
|
|
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
|
|
|
|
#define roundup(x, y) \
|
|
({ \
|
|
const typeof(y) __y = (y); \
|
|
(((x) + __y - 1) / __y) * __y; \
|
|
})
|
|
|
|
/* offsetofend */
|
|
#define offsetofend(TYPE, MEMBER) \
|
|
(offsetof(TYPE, MEMBER) + sizeof(((TYPE *)0)->MEMBER))
|
|
|
|
#define min_t(type, x, y) \
|
|
({ type __x = (x); type __y = (y); __x < __y ? __x : __y; })
|
|
#define max_t(type, x, y) \
|
|
({ type __x = (x); type __y = (y); __x > __y ? __x : __y; })
|
|
|
|
|
|
#define cnt64_gt(a, b) \
|
|
(typecheck(uint64_t, a) && typecheck(uint64_t, b) && \
|
|
((int64_t)(b) - (int64_t)(a) < 0))
|
|
#define cnt64_ge(a, b) \
|
|
(typecheck(uint64_t, a) && typecheck(uint64_t, b) && \
|
|
((int64_t)(a) - (int64_t)(b) >= 0))
|
|
#define cnt64_lt(a, b) cnt64_gt(b, a)
|
|
#define cnt64_le(a, b) cnt64_ge(b, a)
|
|
|
|
|
|
#define timeval_to_timespec(tv, ts) \
|
|
do { \
|
|
(ts)->tv_sec = (tv)->tv_sec; \
|
|
(ts)->tv_nsec = (tv)->tv_usec * 1000; \
|
|
} while (0)
|
|
|
|
#endif /* __UTIL_H__ */
|