#ifndef SCM_DYNWIND_H
#define SCM_DYNWIND_H

/* Copyright 1995-1996,1998-2000,2003-2004,2006,2008,2011-2012,2018
 *   Free Software Foundation, Inc.
 *
 * 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 3 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
 */



#include "libguile/dynstack.h"



SCM_API SCM scm_dynamic_wind (SCM thunk1, SCM thunk2, SCM thunk3);

SCM_INTERNAL void scm_init_dynwind (void);

SCM_API void scm_swap_bindings (SCM vars, SCM vals);

typedef enum {
  SCM_F_DYNWIND_REWINDABLE = SCM_F_DYNSTACK_FRAME_REWINDABLE
} scm_t_dynwind_flags;

typedef enum {
  SCM_F_WIND_EXPLICITLY = SCM_F_DYNSTACK_WINDER_EXPLICIT
} scm_t_wind_flags;

SCM_API void scm_dynwind_begin (scm_t_dynwind_flags);
SCM_API void scm_dynwind_end (void);

SCM_API void scm_dynwind_unwind_handler (void (*func) (void *), void *data,
					 scm_t_wind_flags);
SCM_API void scm_dynwind_rewind_handler (void (*func) (void *), void *data,
					 scm_t_wind_flags);

SCM_API void scm_dynwind_unwind_handler_with_scm (void (*func) (SCM), SCM data,
						  scm_t_wind_flags);
SCM_API void scm_dynwind_rewind_handler_with_scm (void (*func) (SCM), SCM data,
						  scm_t_wind_flags);

SCM_API void scm_dynwind_free (void *mem);


#endif  /* SCM_DYNWIND_H */