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[FreeBSD/releng/10.0.git] / contrib / jemalloc / include / jemalloc / internal / util.h
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_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 /* Use to assert a particular configuration, e.g., cassert(config_debug). */
46 #define cassert(c) do {                                                 \
47         if ((c) == false)                                               \
48                 assert(false);                                          \
49 } while (0)
50
51 #ifndef not_reached
52 #define not_reached() do {                                              \
53         if (config_debug) {                                             \
54                 malloc_printf(                                          \
55                     "<jemalloc>: %s:%d: Unreachable code reached\n",    \
56                     __FILE__, __LINE__);                                \
57                 abort();                                                \
58         }                                                               \
59 } while (0)
60 #endif
61
62 #ifndef not_implemented
63 #define not_implemented() do {                                          \
64         if (config_debug) {                                             \
65                 malloc_printf("<jemalloc>: %s:%d: Not implemented\n",   \
66                     __FILE__, __LINE__);                                \
67                 abort();                                                \
68         }                                                               \
69 } while (0)
70 #endif
71
72 #define assert_not_implemented(e) do {                                  \
73         if (config_debug && !(e))                                       \
74                 not_implemented();                                      \
75 } while (0)
76
77 #endif /* JEMALLOC_H_TYPES */
78 /******************************************************************************/
79 #ifdef JEMALLOC_H_STRUCTS
80
81 #endif /* JEMALLOC_H_STRUCTS */
82 /******************************************************************************/
83 #ifdef JEMALLOC_H_EXTERNS
84
85 int     buferror(char *buf, size_t buflen);
86 uintmax_t       malloc_strtoumax(const char *nptr, char **endptr, int base);
87 void    malloc_write(const char *s);
88
89 /*
90  * malloc_vsnprintf() supports a subset of snprintf(3) that avoids floating
91  * point math.
92  */
93 int     malloc_vsnprintf(char *str, size_t size, const char *format,
94     va_list ap);
95 int     malloc_snprintf(char *str, size_t size, const char *format, ...)
96     JEMALLOC_ATTR(format(printf, 3, 4));
97 void    malloc_vcprintf(void (*write_cb)(void *, const char *), void *cbopaque,
98     const char *format, va_list ap);
99 void malloc_cprintf(void (*write)(void *, const char *), void *cbopaque,
100     const char *format, ...) JEMALLOC_ATTR(format(printf, 3, 4));
101 void    malloc_printf(const char *format, ...)
102     JEMALLOC_ATTR(format(printf, 1, 2));
103
104 #endif /* JEMALLOC_H_EXTERNS */
105 /******************************************************************************/
106 #ifdef JEMALLOC_H_INLINES
107
108 #ifndef JEMALLOC_ENABLE_INLINE
109 size_t  pow2_ceil(size_t x);
110 void    malloc_write(const char *s);
111 void    set_errno(int errnum);
112 int     get_errno(void);
113 #endif
114
115 #if (defined(JEMALLOC_ENABLE_INLINE) || defined(JEMALLOC_UTIL_C_))
116 /* Compute the smallest power of 2 that is >= x. */
117 JEMALLOC_INLINE size_t
118 pow2_ceil(size_t x)
119 {
120
121         x--;
122         x |= x >> 1;
123         x |= x >> 2;
124         x |= x >> 4;
125         x |= x >> 8;
126         x |= x >> 16;
127 #if (LG_SIZEOF_PTR == 3)
128         x |= x >> 32;
129 #endif
130         x++;
131         return (x);
132 }
133
134 /* Sets error code */
135 JEMALLOC_INLINE void
136 set_errno(int errnum)
137 {
138
139 #ifdef _WIN32
140         SetLastError(errnum);
141 #else
142         errno = errnum;
143 #endif
144 }
145
146 /* Get last error code */
147 JEMALLOC_INLINE int
148 get_errno(void)
149 {
150
151 #ifdef _WIN32
152         return (GetLastError());
153 #else
154         return (errno);
155 #endif
156 }
157 #endif
158
159 #endif /* JEMALLOC_H_INLINES */
160 /******************************************************************************/