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/*
This file is part of libmicrohttpd
Copyright (C) 2007-2018 Daniel Pittman and Christian Grothoff
Copyright (C) 2014-2022 Evgeny Grin (Karlson2k)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file microhttpd/mhd_panic.h
* @brief Declaration and macros for MHD_panic()
* @author Daniel Pittman
* @author Christian Grothoff
* @author Karlson2k (Evgeny Grin)
*/
#ifndef MHD_PANIC_H
#define MHD_PANIC_H 1
#include "mhd_options.h"
#ifdef MHD_PANIC
/* Override any possible defined MHD_PANIC macro with proper one */
#undef MHD_PANIC
#endif /* MHD_PANIC */
/* If we have Clang or gcc >= 4.5, use __builtin_unreachable() */
#if defined(__clang__) || (defined(__GNUC__) && __GNUC__ > 4) || \
(defined(__GNUC__) && __GNUC__ == 4 && __GNUC_MINOR__ >= 5)
#define BUILTIN_NOT_REACHED __builtin_unreachable ()
#elif defined(_MSC_FULL_VER)
#define BUILTIN_NOT_REACHED __assume (0)
#else
#define BUILTIN_NOT_REACHED
#endif
/* The MHD_PanicCallback type, but without main header. */
/**
* Handler for fatal errors.
*/
extern void
(*mhd_panic) (void *cls,
const char *file,
unsigned int line,
const char *reason);
/**
* Closure argument for "mhd_panic".
*/
extern void *mhd_panic_cls;
#ifdef HAVE_MESSAGES
/**
* Trigger 'panic' action based on fatal errors.
*
* @param msg error message (const char *)
*/
#define MHD_PANIC(msg) do { mhd_panic (mhd_panic_cls, __FILE__, __LINE__, msg); \
BUILTIN_NOT_REACHED; } while (0)
#else
/**
* Trigger 'panic' action based on fatal errors.
*
* @param msg error message (const char *)
*/
#define MHD_PANIC(msg) do { mhd_panic (mhd_panic_cls, __FILE__, __LINE__, NULL); \
BUILTIN_NOT_REACHED; } while (0)
#endif
#endif /* MHD_PANIC_H */
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