LXR linux/tools/perf/util/include/linux/kernel.h

   1#ifndef PERF_LINUX_KERNEL_H_
   2#define PERF_LINUX_KERNEL_H_
   3
   4#include <stdarg.h>
   5#include <stdio.h>
   6#include <stdlib.h>
   7#include <assert.h>
   8
   9#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
  10
  11#define ALIGN(x,a)              __ALIGN_MASK(x,(typeof(x))(a)-1)
  12#define __ALIGN_MASK(x,mask)    (((x)+(mask))&~(mask))
  13
  14#ifndef offsetof
  15#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
  16#endif
  17
  18#ifndef container_of
  19/**
  20 * container_of - cast a member of a structure out to the containing structure
  21 * @ptr:        the pointer to the member.
  22 * @type:       the type of the container struct this is embedded in.
  23 * @member:     the name of the member within the struct.
  24 *
  25 */
  26#define container_of(ptr, type, member) ({                      \
  27        const typeof(((type *)0)->member) * __mptr = (ptr);     \
  28        (type *)((char *)__mptr - offsetof(type, member)); })
  29#endif
  30
  31#define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
  32
  33#ifndef max
  34#define max(x, y) ({                            \
  35        typeof(x) _max1 = (x);                  \
  36        typeof(y) _max2 = (y);                  \
  37        (void) (&_max1 == &_max2);              \
  38        _max1 > _max2 ? _max1 : _max2; })
  39#endif
  40
  41#ifndef min
  42#define min(x, y) ({                            \
  43        typeof(x) _min1 = (x);                  \
  44        typeof(y) _min2 = (y);                  \
  45        (void) (&_min1 == &_min2);              \
  46        _min1 < _min2 ? _min1 : _min2; })
  47#endif
  48
  49#ifndef BUG_ON
  50#define BUG_ON(cond) assert(!(cond))
  51#endif
  52
  53/*
  54 * Both need more care to handle endianness
  55 * (Don't use bitmap_copy_le() for now)
  56 */
  57#define cpu_to_le64(x)  (x)
  58#define cpu_to_le32(x)  (x)
  59
  60static inline int
  61vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
  62{
  63        int i;
  64        ssize_t ssize = size;
  65
  66        i = vsnprintf(buf, size, fmt, args);
  67
  68        return (i >= ssize) ? (ssize - 1) : i;
  69}
  70
  71static inline int scnprintf(char * buf, size_t size, const char * fmt, ...)
  72{
  73        va_list args;
  74        ssize_t ssize = size;
  75        int i;
  76
  77        va_start(args, fmt);
  78        i = vsnprintf(buf, size, fmt, args);
  79        va_end(args);
  80
  81        return (i >= ssize) ? (ssize - 1) : i;
  82}
  83
  84static inline unsigned long
  85simple_strtoul(const char *nptr, char **endptr, int base)
  86{
  87        return strtoul(nptr, endptr, base);
  88}
  89
  90int eprintf(int level,
  91            const char *fmt, ...) __attribute__((format(printf, 2, 3)));
  92
  93#ifndef pr_fmt
  94#define pr_fmt(fmt) fmt
  95#endif
  96
  97#define pr_err(fmt, ...) \
  98        eprintf(0, pr_fmt(fmt), ##__VA_ARGS__)
  99#define pr_warning(fmt, ...) \
 100        eprintf(0, pr_fmt(fmt), ##__VA_ARGS__)
 101#define pr_info(fmt, ...) \
 102        eprintf(0, pr_fmt(fmt), ##__VA_ARGS__)
 103#define pr_debug(fmt, ...) \
 104        eprintf(1, pr_fmt(fmt), ##__VA_ARGS__)
 105#define pr_debugN(n, fmt, ...) \
 106        eprintf(n, pr_fmt(fmt), ##__VA_ARGS__)
 107#define pr_debug2(fmt, ...) pr_debugN(2, pr_fmt(fmt), ##__VA_ARGS__)
 108#define pr_debug3(fmt, ...) pr_debugN(3, pr_fmt(fmt), ##__VA_ARGS__)
 109#define pr_debug4(fmt, ...) pr_debugN(4, pr_fmt(fmt), ##__VA_ARGS__)
 110
 111#endif
 112