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43cbcd8a ACM |
1 | #ifndef PERF_LINUX_KERNEL_H_ |
2 | #define PERF_LINUX_KERNEL_H_ | |
3 | ||
5a116dd2 FW |
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 | ||
43cbcd8a ACM |
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 | ||
1967936d ACM |
31 | #define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); })) |
32 | ||
52d422de ACM |
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 | ||
5a116dd2 FW |
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 | ||
86d5a70c IT |
49 | #ifndef roundup |
50 | #define roundup(x, y) ( \ | |
51 | { \ | |
52 | const typeof(y) __y = y; \ | |
53 | (((x) + (__y - 1)) / __y) * __y; \ | |
54 | } \ | |
55 | ) | |
56 | #endif | |
57 | ||
5a116dd2 | 58 | #ifndef BUG_ON |
8bf98b89 IT |
59 | #ifdef NDEBUG |
60 | #define BUG_ON(cond) do { if (cond) {} } while (0) | |
61 | #else | |
5a116dd2 FW |
62 | #define BUG_ON(cond) assert(!(cond)) |
63 | #endif | |
8bf98b89 | 64 | #endif |
5a116dd2 FW |
65 | |
66 | /* | |
67 | * Both need more care to handle endianness | |
68 | * (Don't use bitmap_copy_le() for now) | |
69 | */ | |
70 | #define cpu_to_le64(x) (x) | |
71 | #define cpu_to_le32(x) (x) | |
72 | ||
73 | static inline int | |
74 | vscnprintf(char *buf, size_t size, const char *fmt, va_list args) | |
75 | { | |
76 | int i; | |
77 | ssize_t ssize = size; | |
78 | ||
79 | i = vsnprintf(buf, size, fmt, args); | |
80 | ||
81 | return (i >= ssize) ? (ssize - 1) : i; | |
82 | } | |
83 | ||
84 | static inline int scnprintf(char * buf, size_t size, const char * fmt, ...) | |
85 | { | |
86 | va_list args; | |
87 | ssize_t ssize = size; | |
88 | int i; | |
89 | ||
90 | va_start(args, fmt); | |
91 | i = vsnprintf(buf, size, fmt, args); | |
92 | va_end(args); | |
93 | ||
94 | return (i >= ssize) ? (ssize - 1) : i; | |
95 | } | |
96 | ||
97 | static inline unsigned long | |
98 | simple_strtoul(const char *nptr, char **endptr, int base) | |
99 | { | |
100 | return strtoul(nptr, endptr, base); | |
101 | } | |
102 | ||
b4f5296f ACM |
103 | int eprintf(int level, |
104 | const char *fmt, ...) __attribute__((format(printf, 2, 3))); | |
105 | ||
6beba7ad ACM |
106 | #ifndef pr_fmt |
107 | #define pr_fmt(fmt) fmt | |
108 | #endif | |
109 | ||
110 | #define pr_err(fmt, ...) \ | |
b4f5296f | 111 | eprintf(0, pr_fmt(fmt), ##__VA_ARGS__) |
6beba7ad | 112 | #define pr_warning(fmt, ...) \ |
b4f5296f | 113 | eprintf(0, pr_fmt(fmt), ##__VA_ARGS__) |
6beba7ad | 114 | #define pr_info(fmt, ...) \ |
b4f5296f | 115 | eprintf(0, pr_fmt(fmt), ##__VA_ARGS__) |
6beba7ad ACM |
116 | #define pr_debug(fmt, ...) \ |
117 | eprintf(1, pr_fmt(fmt), ##__VA_ARGS__) | |
118 | #define pr_debugN(n, fmt, ...) \ | |
119 | eprintf(n, pr_fmt(fmt), ##__VA_ARGS__) | |
120 | #define pr_debug2(fmt, ...) pr_debugN(2, pr_fmt(fmt), ##__VA_ARGS__) | |
121 | #define pr_debug3(fmt, ...) pr_debugN(3, pr_fmt(fmt), ##__VA_ARGS__) | |
29a9f66d | 122 | #define pr_debug4(fmt, ...) pr_debugN(4, pr_fmt(fmt), ##__VA_ARGS__) |
6beba7ad | 123 | |
339ce005 JO |
124 | /* |
125 | * This looks more complex than it should be. But we need to | |
126 | * get the type for the ~ right in round_down (it needs to be | |
127 | * as wide as the result!), and we want to evaluate the macro | |
128 | * arguments just once each. | |
129 | */ | |
130 | #define __round_mask(x, y) ((__typeof__(x))((y)-1)) | |
131 | #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1) | |
132 | #define round_down(x, y) ((x) & ~__round_mask(x, y)) | |
133 | ||
43cbcd8a | 134 | #endif |