deps/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 /******************************************************************************/