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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 MHD_panic() function and helpers
* @author Daniel Pittman
* @author Christian Grothoff
* @author Karlson2k (Evgeny Grin)
*/
#include "mhd_panic.h"
#include "platform.h"
#include "microhttpd.h"
/**
* Handler for fatal errors.
*/
MHD_PanicCallback mhd_panic = (MHD_PanicCallback) NULL;
/**
* Closure argument for #mhd_panic.
*/
void *mhd_panic_cls = NULL;
/**
* Default implementation of the panic function,
* prints an error message and aborts.
*
* @param cls unused
* @param file name of the file with the problem
* @param line line number with the problem
* @param reason error message with details
*/
_MHD_NORETURN static void
mhd_panic_std (void *cls,
const char *file,
unsigned int line,
const char *reason)
{
(void) cls; /* Mute compiler warning. */
#ifdef HAVE_MESSAGES
fprintf (stderr,
_ ("Fatal error in GNU libmicrohttpd %s:%u: %s\n"),
file,
line,
reason);
#else /* ! HAVE_MESSAGES */
(void) file; /* Mute compiler warning. */
(void) line; /* Mute compiler warning. */
(void) reason; /* Mute compiler warning. */
#endif
abort ();
}
/**
* Sets the global error handler to a different implementation.
*
* @a cb will only be called in the case of typically fatal, serious internal
* consistency issues or serious system failures like failed lock of mutex.
*
* These issues should only arise in the case of serious memory corruption or
* similar problems with the architecture, there is no safe way to continue
* even for closing of the application.
*
* The default implementation that is used if no panic function is set simply
* prints an error message and calls `abort()`.
* Alternative implementations might call `exit()` or other similar functions.
*
* @param cb new error handler or NULL to use default handler
* @param cls passed to @a cb
* @ingroup logging
*/
_MHD_EXTERN void
MHD_set_panic_func (MHD_PanicCallback cb,
void *cls)
{
if ((MHD_PanicCallback) NULL != cb)
mhd_panic = cb;
else
mhd_panic = &mhd_panic_std;
mhd_panic_cls = cls;
}
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