include/lttng/constant.h

   1 /*
   2  * Copyright (C) 2014 David Goulet <dgoulet@efficios.com>
   3  *
   4  * SPDX-License-Identifier: LGPL-2.1-only
   5  *
   6  */
   7
   8 #ifndef LTTNG_CONSTANT_H
   9 #define LTTNG_CONSTANT_H
  10
  11 #ifndef LTTNG_DEPRECATED
  12 #if defined (__GNUC__) \
  13         && ((__GNUC_MAJOR__ == 4) && (__GNUC_MINOR__ >= 5)  \
  14                         || __GNUC_MAJOR__ >= 5)
  15 #define LTTNG_DEPRECATED(msg) __attribute__((deprecated(msg)))
  16 #else
  17 #define LTTNG_DEPRECATED(msg) __attribute__((deprecated))
  18 #endif /* defined __GNUC__ */
  19 #endif /* LTTNG_DEPRECATED */
  20
  21 #include <limits.h>
  22 /*
  23  * Necessary to include the fixed width type limits on glibc versions older
  24  * than 2.18 when building with a C++ compiler.
  25  */
  26 #ifndef __STDC_LIMIT_MACROS
  27 #define __STDC_LIMIT_MACROS
  28 #include <stdint.h>
  29 #undef __STDC_LIMIT_MACROS
  30 #else /* #ifndef __STDC_LIMIT_MACROS */
  31 #include <stdint.h>
  32 #endif /* #else #ifndef __STDC_LIMIT_MACROS */
  33 #include <sys/types.h>
  34
  35 /*
  36  * Event symbol length. Copied from LTTng kernel ABI.
  37  */
  38 #define LTTNG_SYMBOL_NAME_LEN                   256
  39
  40 /*
  41  * PROC(5) mentions that PID_MAX_LIMIT may not exceed 2^22 on 64-bit HW.
  42  * We prefer to use 32-bits for simplicity's sake.
  43  */
  44 #define LTTNG_MAX_PID                           INT32_MAX
  45 #define LTTNG_MAX_PID_STR                       "2147483647"
  46
  47 #define LTTNG_NAME_MAX                          255
  48
  49 /*
  50  * POSIX guarantees that a host name will not exceed 255 characters.
  51  * Moreover, RFC 1035 limits the length of a fully qualified domain name (FQDN)
  52  * to 255 characters.
  53  *
  54  * 256 is used to include a trailing NULL character.
  55  */
  56 #define LTTNG_HOST_NAME_MAX                     256
  57
  58 #define LTTNG_PATH_MAX                          4096
  59
  60 #endif /* LTTNG_CONSTANT_H */