src/macro.h

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #ifndef __LXCFS_MACRO_H
   4 #define __LXCFS_MACRO_H
   5
   6 #ifndef _GNU_SOURCE
   7 #define _GNU_SOURCE
   8 #endif
   9
  10 #ifndef FUSE_USE_VERSION
  11 #define FUSE_USE_VERSION 26
  12 #endif
  13
  14 #define _FILE_OFFSET_BITS 64
  15
  16 #include <stdio.h>
  17
  18 #include "config.h"
  19
  20 #define BATCH_SIZE 50
  21
  22 /* filesystem magic values */
  23 #ifndef CGROUP_SUPER_MAGIC
  24 #define CGROUP_SUPER_MAGIC 0x27e0eb
  25 #endif
  26
  27 #ifndef CGROUP2_SUPER_MAGIC
  28 #define CGROUP2_SUPER_MAGIC 0x63677270
  29 #endif
  30
  31 #define lxcfs_debug_stream(stream, format, ...)                                \
  32         do {                                                                   \
  33                 fprintf(stream, "%s: %d: %s: " format "\n", __FILE__, __LINE__,     \
  34                         __func__, ##__VA_ARGS__);                                \
  35         } while (false)
  36
  37 #define lxcfs_error(format, ...) lxcfs_debug_stream(stderr, format, ##__VA_ARGS__)
  38
  39 #ifdef DEBUG
  40 #define lxcfs_debug(format, ...) lxcfs_error(format, ##__VA_ARGS__)
  41 #else
  42 #define lxcfs_debug(format, ...)
  43 #endif /* DEBUG */
  44
  45 #ifdef VERBOSE
  46 #define lxcfs_v(format, ...) lxcfs_error(format, ##__VA_ARGS__);
  47 #else
  48 #define lxcfs_v(format, ...)
  49 #endif /* VERBOSE */
  50
  51 #define lxcfs_info(format, ...)                              \
  52         do {                                                 \
  53                 fprintf(stderr, format "\n", ##__VA_ARGS__); \
  54         } while (false)
  55
  56 #define log_error_errno(__ret__, __errno__, format, ...) \
  57         ({                                               \
  58                 errno = __errno__;                       \
  59                 lxcfs_error(format, ##__VA_ARGS__);      \
  60                 __ret__;                                 \
  61         })
  62
  63 #define log_error(__ret__, format, ...)             \
  64         ({                                          \
  65                 lxcfs_error(format, ##__VA_ARGS__); \
  66                 __ret__;                            \
  67         })
  68
  69 #define STRLITERALLEN(x) (sizeof(""x"") - 1)
  70
  71 /* Calculate the number of chars needed to represent a given integer as a C
  72  * string. Include room for '-' to indicate negative numbers and the \0 byte.
  73  * This is based on systemd.
  74  */
  75 #define INTTYPE_TO_STRLEN(type)                   \
  76         (2 + (sizeof(type) <= 1                   \
  77                   ? 3                             \
  78                   : sizeof(type) <= 2             \
  79                         ? 5                       \
  80                         : sizeof(type) <= 4       \
  81                               ? 10                \
  82                               : sizeof(type) <= 8 \
  83                                     ? 20          \
  84                                     : sizeof(int[-2 * (sizeof(type) > 8)])))
  85
  86 #define ret_errno(__errno__)       \
  87         ({                         \
  88                 errno = __errno__; \
  89                 -__errno__;        \
  90         })
  91
  92 #define ret_set_errno(__ret__, __errno__) \
  93         ({                                \
  94                 errno = __errno__;        \
  95                 __ret__;                  \
  96         })
  97
  98 #define lxc_iterate_parts(__iterator, __splitme, __separators)                  \
  99         for (char *__p = NULL, *__it = strtok_r(__splitme, __separators, &__p); \
 100              (__iterator = __it);                                               \
 101              __iterator = __it = strtok_r(NULL, __separators, &__p))
 102
 103 #define log_exit(format, ...)                           \
 104         ({                                              \
 105                 fprintf(stderr, format, ##__VA_ARGS__); \
 106                 _exit(EXIT_FAILURE);                    \
 107         })
 108
 109 #ifdef DEBUG
 110 #define log_debug(__ret__, format, ...)                    \
 111         ({                                                 \
 112                 lxcfs_debug_stream(format, ##__VA_ARGS__); \
 113                 __ret__;                                   \
 114         })
 115 #else
 116 #define log_debug(__ret__, format, ...) ({ __ret__; })
 117 #endif
 118
 119 #define PTR_TO_INT(p) ((int)((intptr_t)(p)))
 120 #define INT_TO_PTR(u) ((void *)((intptr_t)(u)))
 121 #define PTR_TO_UINT64(p) ((uint64_t)((intptr_t)(p)))
 122 #define INTTYPE_TO_PTR(u) ((void *)((intptr_t)(u)))
 123
 124 #define __visible __attribute__((visibility("default")))
 125
 126 #endif /* __LXCFS_MACRO_H */