lib/util/attr.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Samba utility functions
   4    Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2007
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #ifndef __UTIL_ATTR_H__
  21 #define __UTIL_ATTR_H__
  22
  23 #ifndef _UNUSED_
  24 #ifdef __GNUC__
  25 /** gcc attribute used on function parameters so that it does not emit
  26  * warnings about them being unused. **/
  27 #  define _UNUSED_ __attribute__ ((unused))
  28 #else
  29 #  define _UNUSED_
  30 /** Feel free to add definitions for other compilers here. */
  31 #endif
  32 #endif
  33 #ifndef UNUSED
  34 #define UNUSED(param) param _UNUSED_
  35 #endif
  36
  37 #ifndef _DEPRECATED_
  38 #if (__GNUC__ >= 3) && (__GNUC_MINOR__ >= 1 )
  39 #define _DEPRECATED_ __attribute__ ((deprecated))
  40 #else
  41 #define _DEPRECATED_
  42 #endif
  43 #endif
  44
  45 #ifndef _WARN_UNUSED_RESULT_
  46 #if (__GNUC__ >= 3) && (__GNUC_MINOR__ >= 1 )
  47 #define _WARN_UNUSED_RESULT_ __attribute__ ((warn_unused_result))
  48 #else
  49 #define _WARN_UNUSED_RESULT_
  50 #endif
  51 #endif
  52
  53 #ifndef _NORETURN_
  54 #if (__GNUC__ >= 3) && (__GNUC_MINOR__ >= 1 )
  55 #define _NORETURN_ __attribute__ ((noreturn))
  56 #else
  57 #define _NORETURN_
  58 #endif
  59 #endif
  60
  61 #ifndef _PURE_
  62 #if (__GNUC__ >= 3) && (__GNUC_MINOR__ >= 1)
  63 #define _PURE_ __attribute__((pure))
  64 #else
  65 #define _PURE_
  66 #endif
  67 #endif
  68
  69 #ifndef NONNULL
  70 #if (__GNUC__ >= 3) && (__GNUC_MINOR__ >= 1)
  71 #define NONNULL(param) param __attribute__((nonnull))
  72 #else
  73 #define NONNULL(param) param
  74 #endif
  75 #endif
  76
  77 #ifndef PRINTF_ATTRIBUTE
  78 #if __GNUC__ >= 3
  79 /** Use gcc attribute to check printf fns.  a1 is the 1-based index of
  80  * the parameter containing the format, and a2 the index of the first
  81  * argument. Note that some gcc 2.x versions don't handle this
  82  * properly **/
  83 #define PRINTF_ATTRIBUTE(a1, a2) __attribute__ ((format (__printf__, a1, a2)))
  84 #else
  85 #define PRINTF_ATTRIBUTE(a1, a2)
  86 #endif
  87 #endif
  88
  89 #ifndef FORMAT_ATTRIBUTE
  90 #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)
  91 /** Use gcc attribute to check printf fns.  a1 is argument to format()
  92  * in the above macro.  This is needed to support Heimdal's printf
  93  * decorations. Note that some gcc 2.x versions don't handle this
  94  * properly, and as such I've used the same minimum from heimdal: GCC 3.1 **/
  95 #define FORMAT_ATTRIBUTE(a) __attribute__ ((format a))
  96 #else
  97 #define FORMAT_ATTRIBUTE(a)
  98 #endif
  99 #endif
 100
 101 #endif /* __UTIL_ATTR_H__ */