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 log_error_errno(__ret__, __errno__, format, ...) \
  52         ({                                               \
  53                 errno = __errno__;                       \
  54                 lxcfs_error(format, ##__VA_ARGS__);      \
  55                 __ret__;                                 \
  56         })
  57
  58 #define log_error(__ret__, format, ...)             \
  59         ({                                          \
  60                 lxcfs_error(format, ##__VA_ARGS__); \
  61                 __ret__;                            \
  62         })
  63
  64 #define STRLITERALLEN(x) (sizeof(""x"") - 1)
  65
  66 /* Calculate the number of chars needed to represent a given integer as a C
  67  * string. Include room for '-' to indicate negative numbers and the \0 byte.
  68  * This is based on systemd.
  69  */
  70 #define INTTYPE_TO_STRLEN(type)                   \
  71         (2 + (sizeof(type) <= 1                   \
  72                   ? 3                             \
  73                   : sizeof(type) <= 2             \
  74                         ? 5                       \
  75                         : sizeof(type) <= 4       \
  76                               ? 10                \
  77                               : sizeof(type) <= 8 \
  78                                     ? 20          \
  79                                     : sizeof(int[-2 * (sizeof(type) > 8)])))
  80
  81 #define ret_errno(__errno__)       \
  82         ({                         \
  83                 errno = __errno__; \
  84                 -__errno__;        \
  85         })
  86
  87 #define ret_set_errno(__ret__, __errno__) \
  88         ({                                \
  89                 errno = __errno__;        \
  90                 __ret__;                  \
  91         })
  92
  93 #define lxc_iterate_parts(__iterator, __splitme, __separators)                  \
  94         for (char *__p = NULL, *__it = strtok_r(__splitme, __separators, &__p); \
  95              (__iterator = __it);                                               \
  96              __iterator = __it = strtok_r(NULL, __separators, &__p))
  97
  98 #define log_exit(format, ...)                           \
  99         ({                                              \
 100                 fprintf(stderr, format, ##__VA_ARGS__); \
 101                 _exit(EXIT_FAILURE);                    \
 102         })
 103
 104 #define PTR_TO_INT(p) ((int)((intptr_t)(p)))
 105 #define INT_TO_PTR(u) ((void *)((intptr_t)(u)))
 106 #define PTR_TO_UINT64(p) ((uint64_t)((intptr_t)(p)))
 107 #define INTTYPE_TO_PTR(u) ((void *)((intptr_t)(u)))
 108
 109 #endif /* __LXCFS_MACRO_H */