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__) && ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 5) || __GNUC__ >= 5)
  13 #define LTTNG_DEPRECATED(msg) __attribute__((deprecated(msg)))
  14 #else
  15 #define LTTNG_DEPRECATED(msg) __attribute__((deprecated))
  16 #endif /* defined __GNUC__ */
  17 #endif /* LTTNG_DEPRECATED */
  18
  19 #include <limits.h>
  20 /*
  21  * Necessary to include the fixed width type limits on glibc versions older
  22  * than 2.18 when building with a C++ compiler.
  23  */
  24 #ifndef __STDC_LIMIT_MACROS
  25 #define __STDC_LIMIT_MACROS
  26 #include <stdint.h>
  27 #undef __STDC_LIMIT_MACROS
  28 #else /* #ifndef __STDC_LIMIT_MACROS */
  29 #include <stdint.h>
  30 #endif /* #else #ifndef __STDC_LIMIT_MACROS */
  31 #include <sys/types.h>
  32
  33 /*
  34  * Event symbol length. Copied from LTTng kernel ABI.
  35  */
  36
  37 /*!
  38 @brief
  39     Maximum symbol length.
  40
  41 @ingroup api_gen
  42 */
  43 #define LTTNG_SYMBOL_NAME_LEN 256
  44
  45 /*
  46  * PROC(5) mentions that PID_MAX_LIMIT may not exceed 2^22 on 64-bit HW.
  47  * We prefer to use 32-bits for simplicity's sake.
  48  */
  49 #define LTTNG_MAX_PID     INT32_MAX
  50 #define LTTNG_MAX_PID_STR "2147483647"
  51
  52 /*!
  53 @brief
  54     Maximum name length.
  55
  56 @ingroup api_gen
  57 */
  58 #define LTTNG_NAME_MAX 255
  59
  60 /*
  61  * POSIX guarantees that a host name will not exceed 255 characters.
  62  * Moreover, RFC 1035 limits the length of a fully qualified domain name (FQDN)
  63  * to 255 characters.
  64  *
  65  * 256 is used to include a trailing NULL character.
  66  */
  67 #define LTTNG_HOST_NAME_MAX 256
  68
  69 #define LTTNG_PATH_MAX 4096
  70
  71 #endif /* LTTNG_CONSTANT_H */