src/lib/panic.c

/*
  This file is part of libmicrohttpd
  Copyright (C) 2007-2018 Daniel Pittman and Christian Grothoff

  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 lib/panic.c
 * @brief functions to panic (abort)
 * @author Christian Grothoff
 */
#include "internal.h"


/**
 * Handler for fatal errors.
 */
MHD_PanicCallback mhd_panic = NULL;

/**
 * Closure argument for #mhd_panic.
 */
void *mhd_panic_cls = NULL;


/**
 * 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.  These issues should only arise in the
 * case of serious memory corruption or similar problems with the
 * architecture.  While @a cb is allowed to return and MHD will then
 * try to continue, this is never safe.
 *
 * 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
 * @param cls passed to @a cb
 * @ingroup logging
 */
void
MHD_set_panic_func (MHD_PanicCallback cb,
                    void *cls)
{
  mhd_panic = cb;
  mhd_panic_cls = cls;
}