util.h revision 86abd0dcd8e478759fe409d338d11558c4cec427 
1/******************************************************************************/
2#ifdef JEMALLOC_H_TYPES
3
4/* Size of stack-allocated buffer passed to buferror(). */
5#define	BUFERROR_BUF		64
6
7/*
8 * Size of stack-allocated buffer used by malloc_{,v,vc}printf().  This must be
9 * large enough for all possible uses within jemalloc.
10 */
11#define	MALLOC_PRINTF_BUFSIZE	4096
12
13/*
14 * Wrap a cpp argument that contains commas such that it isn't broken up into
15 * multiple arguments.
16 */
17#define JEMALLOC_ARG_CONCAT(...) __VA_ARGS__
18
19/*
20 * Silence compiler warnings due to uninitialized values.  This is used
21 * wherever the compiler fails to recognize that the variable is never used
22 * uninitialized.
23 */
24#ifdef JEMALLOC_CC_SILENCE
25#  define JEMALLOC_CC_SILENCE_INIT(v) = v
26#else
27#  define JEMALLOC_CC_SILENCE_INIT(v)
28#endif
29
30/*
31 * Define a custom assert() in order to reduce the chances of deadlock during
32 * assertion failure.
33 */
34#ifndef assert
35#define	assert(e) do {							\
36	if (config_debug && !(e)) {					\
37		malloc_printf(						\
38		    "<jemalloc>: %s:%d: Failed assertion: \"%s\"\n",	\
39		    __FILE__, __LINE__, #e);				\
40		abort();						\
41	}								\
42} while (0)
43#endif
44
45#ifndef not_reached
46#define	not_reached() do {						\
47	if (config_debug) {						\
48		malloc_printf(						\
49		    "<jemalloc>: %s:%d: Unreachable code reached\n",	\
50		    __FILE__, __LINE__);				\
51		abort();						\
52	}								\
53} while (0)
54#endif
55
56#ifndef not_implemented
57#define	not_implemented() do {						\
58	if (config_debug) {						\
59		malloc_printf("<jemalloc>: %s:%d: Not implemented\n",	\
60		    __FILE__, __LINE__);				\
61		abort();						\
62	}								\
63} while (0)
64#endif
65
66#ifndef assert_not_implemented
67#define	assert_not_implemented(e) do {					\
68	if (config_debug && !(e))					\
69		not_implemented();					\
70} while (0)
71#endif
72
73/* Use to assert a particular configuration, e.g., cassert(config_debug). */
74#define	cassert(c) do {							\
75	if ((c) == false)						\
76		not_reached();						\
77} while (0)
78
79#endif /* JEMALLOC_H_TYPES */
80/******************************************************************************/
81#ifdef JEMALLOC_H_STRUCTS
82
83#endif /* JEMALLOC_H_STRUCTS */
84/******************************************************************************/
85#ifdef JEMALLOC_H_EXTERNS
86
87int	buferror(char *buf, size_t buflen);
88uintmax_t	malloc_strtoumax(const char *nptr, char **endptr, int base);
89void	malloc_write(const char *s);
90
91/*
92 * malloc_vsnprintf() supports a subset of snprintf(3) that avoids floating
93 * point math.
94 */
95int	malloc_vsnprintf(char *str, size_t size, const char *format,
96    va_list ap);
97int	malloc_snprintf(char *str, size_t size, const char *format, ...)
98    JEMALLOC_ATTR(format(printf, 3, 4));
99void	malloc_vcprintf(void (*write_cb)(void *, const char *), void *cbopaque,
100    const char *format, va_list ap);
101void malloc_cprintf(void (*write)(void *, const char *), void *cbopaque,
102    const char *format, ...) JEMALLOC_ATTR(format(printf, 3, 4));
103void	malloc_printf(const char *format, ...)
104    JEMALLOC_ATTR(format(printf, 1, 2));
105
106#endif /* JEMALLOC_H_EXTERNS */
107/******************************************************************************/
108#ifdef JEMALLOC_H_INLINES
109
110#ifndef JEMALLOC_ENABLE_INLINE
111size_t	pow2_ceil(size_t x);
112void	set_errno(int errnum);
113int	get_errno(void);
114#endif
115
116#if (defined(JEMALLOC_ENABLE_INLINE) || defined(JEMALLOC_UTIL_C_))
117/* Compute the smallest power of 2 that is >= x. */
118JEMALLOC_INLINE size_t
119pow2_ceil(size_t x)
120{
121
122	x--;
123	x |= x >> 1;
124	x |= x >> 2;
125	x |= x >> 4;
126	x |= x >> 8;
127	x |= x >> 16;
128#if (LG_SIZEOF_PTR == 3)
129	x |= x >> 32;
130#endif
131	x++;
132	return (x);
133}
134
135/* Sets error code */
136JEMALLOC_INLINE void
137set_errno(int errnum)
138{
139
140#ifdef _WIN32
141	SetLastError(errnum);
142#else
143	errno = errnum;
144#endif
145}
146
147/* Get last error code */
148JEMALLOC_INLINE int
149get_errno(void)
150{
151
152#ifdef _WIN32
153	return (GetLastError());
154#else
155	return (errno);
156#endif
157}
158#endif
159
160#endif /* JEMALLOC_H_INLINES */
161/******************************************************************************/
162