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/* ws_attributes.h
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef __WS_ATTRIBUTES_H__
#define __WS_ATTRIBUTES_H__
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/*
* If we're running GCC or clang define _U_ to be "__attribute__((unused))"
* so we can use _U_ to flag unused function parameters and not get warnings
* about them. Otherwise, define _U_ to be an empty string so that _U_ used
* to flag an unused function parameters will compile with other compilers.
*
* XXX - similar hints for other compilers?
*/
#if defined(__GNUC__)
/* This includes clang */
#define _U_ __attribute__((unused))
#else
#define _U_
#endif
/* Hint to the compiler that a function never returns */
#if defined(__GNUC__)
/* This includes clang */
#define WS_NORETURN __attribute__((noreturn))
#elif defined(_MSC_VER)
#define WS_NORETURN __declspec(noreturn)
#else
#define WS_NORETURN
#endif
/* Hint to the compiler that the function returns a non-null value */
#if defined(__GNUC__)
/* This includes clang */
#define WS_RETNONNULL __attribute__((returns_nonnull))
#else
#define WS_RETNONNULL
#endif
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __WS_ATTRIBUTES_H__ */
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