kernel.h revision e6817ec1d8ab31fc7b01906e305f848542df6413 
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/* ANDROID_CHANGE_BEGIN */
12#ifdef __BIONIC__
13/* Bionic defines ALIGN in sys/param.h */
14#define KERNEL_ALIGN(x,a)	__ALIGN_MASK(x,(typeof(x))(a)-1)
15#else
16#define ALIGN(x,a)		__ALIGN_MASK(x,(typeof(x))(a)-1)
17#endif
18/* ANDROID_CHANGE_END */
19#define __ALIGN_MASK(x,mask)	(((x)+(mask))&~(mask))
20
21#ifndef offsetof
22#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
23#endif
24
25#ifndef container_of
26/**
27 * container_of - cast a member of a structure out to the containing structure
28 * @ptr:	the pointer to the member.
29 * @type:	the type of the container struct this is embedded in.
30 * @member:	the name of the member within the struct.
31 *
32 */
33#define container_of(ptr, type, member) ({			\
34	const typeof(((type *)0)->member) * __mptr = (ptr);	\
35	(type *)((char *)__mptr - offsetof(type, member)); })
36#endif
37
38/* ANDROID_CHANGE_BEGIN */
39#ifndef __BIONIC__
40#define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
41#endif
42/* ANDROID_CHANGE_END */
43
44#ifndef max
45#define max(x, y) ({				\
46	typeof(x) _max1 = (x);			\
47	typeof(y) _max2 = (y);			\
48	(void) (&_max1 == &_max2);		\
49	_max1 > _max2 ? _max1 : _max2; })
50#endif
51
52#ifndef min
53#define min(x, y) ({				\
54	typeof(x) _min1 = (x);			\
55	typeof(y) _min2 = (y);			\
56	(void) (&_min1 == &_min2);		\
57	_min1 < _min2 ? _min1 : _min2; })
58#endif
59
60#ifndef BUG_ON
61#define BUG_ON(cond) assert(!(cond))
62#endif
63
64/*
65 * Both need more care to handle endianness
66 * (Don't use bitmap_copy_le() for now)
67 */
68#define cpu_to_le64(x)	(x)
69#define cpu_to_le32(x)	(x)
70
71static inline int
72vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
73{
74	int i;
75	ssize_t ssize = size;
76
77	i = vsnprintf(buf, size, fmt, args);
78
79	return (i >= ssize) ? (ssize - 1) : i;
80}
81
82static inline int scnprintf(char * buf, size_t size, const char * fmt, ...)
83{
84	va_list args;
85	ssize_t ssize = size;
86	int i;
87
88	va_start(args, fmt);
89	i = vsnprintf(buf, size, fmt, args);
90	va_end(args);
91
92	return (i >= ssize) ? (ssize - 1) : i;
93}
94
95static inline unsigned long
96simple_strtoul(const char *nptr, char **endptr, int base)
97{
98	return strtoul(nptr, endptr, base);
99}
100
101int eprintf(int level,
102	    const char *fmt, ...) __attribute__((format(printf, 2, 3)));
103
104#ifndef pr_fmt
105#define pr_fmt(fmt) fmt
106#endif
107
108#define pr_err(fmt, ...) \
109	eprintf(0, pr_fmt(fmt), ##__VA_ARGS__)
110#define pr_warning(fmt, ...) \
111	eprintf(0, pr_fmt(fmt), ##__VA_ARGS__)
112#define pr_info(fmt, ...) \
113	eprintf(0, pr_fmt(fmt), ##__VA_ARGS__)
114#define pr_debug(fmt, ...) \
115	eprintf(1, pr_fmt(fmt), ##__VA_ARGS__)
116#define pr_debugN(n, fmt, ...) \
117	eprintf(n, pr_fmt(fmt), ##__VA_ARGS__)
118#define pr_debug2(fmt, ...) pr_debugN(2, pr_fmt(fmt), ##__VA_ARGS__)
119#define pr_debug3(fmt, ...) pr_debugN(3, pr_fmt(fmt), ##__VA_ARGS__)
120#define pr_debug4(fmt, ...) pr_debugN(4, pr_fmt(fmt), ##__VA_ARGS__)
121
122#endif
123