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 #ifndef max
  32 #define max(x, y) ({                            \
  33         typeof(x) _max1 = (x);                  \
  34         typeof(y) _max2 = (y);                  \
  35         (void) (&_max1 == &_max2);              \
  36         _max1 > _max2 ? _max1 : _max2; })
  37 #endif
  38
  39 #ifndef min
  40 #define min(x, y) ({                            \
  41         typeof(x) _min1 = (x);                  \
  42         typeof(y) _min2 = (y);                  \
  43         (void) (&_min1 == &_min2);              \
  44         _min1 < _min2 ? _min1 : _min2; })
  45 #endif
  46
  47 #ifndef BUG_ON
  48 #define BUG_ON(cond) assert(!(cond))
  49 #endif
  50
  51 /*
  52  * Both need more care to handle endianness
  53  * (Don't use bitmap_copy_le() for now)
  54  */
  55 #define cpu_to_le64(x)  (x)
  56 #define cpu_to_le32(x)  (x)
  57
  58 static inline int
  59 vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
  60 {
  61         int i;
  62         ssize_t ssize = size;
  63
  64         i = vsnprintf(buf, size, fmt, args);
  65
  66         return (i >= ssize) ? (ssize - 1) : i;
  67 }
  68
  69 static inline int scnprintf(char * buf, size_t size, const char * fmt, ...)
  70 {
  71         va_list args;
  72         ssize_t ssize = size;
  73         int i;
  74
  75         va_start(args, fmt);
  76         i = vsnprintf(buf, size, fmt, args);
  77         va_end(args);
  78
  79         return (i >= ssize) ? (ssize - 1) : i;
  80 }
  81
  82 static inline unsigned long
  83 simple_strtoul(const char *nptr, char **endptr, int base)
  84 {
  85         return strtoul(nptr, endptr, base);
  86 }
  87
  88 #ifndef pr_fmt
  89 #define pr_fmt(fmt) fmt
  90 #endif
  91
  92 #define pr_err(fmt, ...) \
  93         do { fprintf(stderr, pr_fmt(fmt), ##__VA_ARGS__); } while (0)
  94 #define pr_warning(fmt, ...) \
  95         do { fprintf(stderr, pr_fmt(fmt), ##__VA_ARGS__); } while (0)
  96 #define pr_info(fmt, ...) \
  97         do { fprintf(stderr, pr_fmt(fmt), ##__VA_ARGS__); } while (0)
  98 #define pr_debug(fmt, ...) \
  99         eprintf(1, pr_fmt(fmt), ##__VA_ARGS__)
 100 #define pr_debugN(n, fmt, ...) \
 101         eprintf(n, pr_fmt(fmt), ##__VA_ARGS__)
 102 #define pr_debug2(fmt, ...) pr_debugN(2, pr_fmt(fmt), ##__VA_ARGS__)
 103 #define pr_debug3(fmt, ...) pr_debugN(3, pr_fmt(fmt), ##__VA_ARGS__)
 104 #define pr_debug4(fmt, ...) pr_debugN(4, pr_fmt(fmt), ##__VA_ARGS__)
 105
 106 #endif