93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
#ifndef __TOOLS_LINUX_KERNEL_H
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#define __TOOLS_LINUX_KERNEL_H
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#include <stdarg.h>
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#include <stddef.h>
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#include <assert.h>
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#include <linux/compiler.h>
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#ifndef UINT_MAX
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#define UINT_MAX (~0U)
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#endif
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#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
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#define PERF_ALIGN(x, a) __PERF_ALIGN_MASK(x, (typeof(x))(a)-1)
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#define __PERF_ALIGN_MASK(x, mask) (((x)+(mask))&~(mask))
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#ifndef offsetof
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#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
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#endif
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#ifndef container_of
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/**
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* container_of - cast a member of a structure out to the containing structure
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* @ptr: the pointer to the member.
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* @type: the type of the container struct this is embedded in.
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* @member: the name of the member within the struct.
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*
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*/
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#define container_of(ptr, type, member) ({ \
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const typeof(((type *)0)->member) * __mptr = (ptr); \
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(type *)((char *)__mptr - offsetof(type, member)); })
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#endif
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#define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
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#ifndef max
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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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#endif
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#ifndef min
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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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#endif
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#ifndef roundup
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#define roundup(x, y) ( \
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{ \
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const typeof(y) __y = y; \
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(((x) + (__y - 1)) / __y) * __y; \
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} \
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)
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#endif
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#ifndef BUG_ON
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#ifdef NDEBUG
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#define BUG_ON(cond) do { if (cond) {} } while (0)
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#else
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#define BUG_ON(cond) assert(!(cond))
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#endif
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#endif
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/*
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* Both need more care to handle endianness
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* (Don't use bitmap_copy_le() for now)
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*/
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#define cpu_to_le64(x) (x)
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#define cpu_to_le32(x) (x)
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int vscnprintf(char *buf, size_t size, const char *fmt, va_list args);
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int scnprintf(char * buf, size_t size, const char * fmt, ...);
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#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
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/*
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* This looks more complex than it should be. But we need to
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* get the type for the ~ right in round_down (it needs to be
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* as wide as the result!), and we want to evaluate the macro
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* arguments just once each.
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*/
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#define __round_mask(x, y) ((__typeof__(x))((y)-1))
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#define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
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#define round_down(x, y) ((x) & ~__round_mask(x, y))
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#endif
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