include/lttng/constant.h

   1 /*
   2  * Copyright (C) 2014 - David Goulet <dgoulet@efficios.com>
   3  *
   4  * This library is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU Lesser General Public License, version 2.1 only,
   6  * as published by the Free Software Foundation.
   7  *
   8  * This library is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
  11  * for more details.
  12  *
  13  * You should have received a copy of the GNU Lesser General Public License
  14  * along with this library; if not, write to the Free Software Foundation,
  15  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  16  */
  17
  18 #ifndef LTTNG_CONSTANT_H
  19 #define LTTNG_CONSTANT_H
  20
  21 #ifndef LTTNG_DEPRECATED
  22 #if defined (__GNUC__) \
  23         && ((__GNUC_MAJOR__ == 4) && (__GNUC_MINOR__ >= 5)  \
  24                         || __GNUC_MAJOR__ >= 5)
  25 #define LTTNG_DEPRECATED(msg) __attribute__((deprecated(msg)))
  26 #else
  27 #define LTTNG_DEPRECATED(msg) __attribute__((deprecated))
  28 #endif /* defined __GNUC__ */
  29 #endif /* LTTNG_DEPRECATED */
  30
  31 #include <limits.h>
  32 /*
  33  * Necessary to include the fixed width type limits on glibc versions older
  34  * than 2.18 when building with a C++ compiler.
  35  */
  36 #ifndef __STDC_LIMIT_MACROS
  37 #define __STDC_LIMIT_MACROS
  38 #include <stdint.h>
  39 #undef __STDC_LIMIT_MACROS
  40 #else /* #ifndef __STDC_LIMIT_MACROS */
  41 #include <stdint.h>
  42 #endif /* #else #ifndef __STDC_LIMIT_MACROS */
  43 #include <sys/types.h>
  44
  45 /*
  46  * Event symbol length. Copied from LTTng kernel ABI.
  47  */
  48 #define LTTNG_SYMBOL_NAME_LEN                   256
  49
  50 /*
  51  * PROC(5) mentions that PID_MAX_LIMIT may not exceed 2^22 on 64-bit HW.
  52  * We prefer to use 32-bits for simplicity's sake.
  53  */
  54 #define LTTNG_MAX_PID                           INT32_MAX
  55 #define LTTNG_MAX_PID_STR                       "2147483647"
  56
  57 #define LTTNG_NAME_MAX                          255
  58
  59 /*
  60  * POSIX guarantees that a host name will not exceed 255 characters.
  61  * Moreover, RFC 1035 limits the length of a fully qualified domain name (FQDN)
  62  * to 255 characters.
  63  *
  64  * 256 is used to include a trailing NULL character.
  65  */
  66 #define LTTNG_HOST_NAME_MAX                     256
  67
  68 #define LTTNG_PATH_MAX                          4096
  69
  70 #endif /* LTTNG_CONSTANT_H */