libguile/dynwind.h

   1 /* classes: h_files */
   2
   3 #ifndef SCM_DYNWIND_H
   4 #define SCM_DYNWIND_H
   5
   6 /* Copyright (C) 1995,1996,1998,1999,2000,2003,2004, 2006, 2008 Free Software Foundation, Inc.
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public License
  10  * as published by the Free Software Foundation; either version 3 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  * 02110-1301 USA
  22  */
  23
  24 \f
  25
  26 #include "libguile/__scm.h"
  27
  28 \f
  29
  30 typedef void (*scm_t_guard) (void *);
  31 typedef SCM (*scm_t_inner) (void *);
  32
  33 SCM_API SCM scm_dynamic_wind (SCM thunk1, SCM thunk2, SCM thunk3);
  34 SCM_API SCM scm_internal_dynamic_wind (scm_t_guard before,
  35                                        scm_t_inner inner,
  36                                        scm_t_guard after,
  37                                        void *inner_data,
  38                                        void *guard_data);
  39 SCM_API void scm_dowinds (SCM to, long delta);
  40 SCM_INTERNAL void scm_i_dowinds (SCM to, long delta,
  41                                  void (*turn_func) (void *), void *data);
  42 SCM_INTERNAL void scm_init_dynwind (void);
  43
  44 SCM_API void scm_swap_bindings (SCM vars, SCM vals);
  45
  46 typedef enum {
  47   SCM_F_DYNWIND_REWINDABLE = (1 << 0)
  48 } scm_t_dynwind_flags;
  49
  50 typedef enum {
  51   SCM_F_WIND_EXPLICITLY = (1 << 0)
  52 } scm_t_wind_flags;
  53
  54 SCM_API void scm_dynwind_begin (scm_t_dynwind_flags);
  55 SCM_API void scm_dynwind_end (void);
  56
  57 SCM_API void scm_dynwind_unwind_handler (void (*func) (void *), void *data,
  58                                          scm_t_wind_flags);
  59 SCM_API void scm_dynwind_rewind_handler (void (*func) (void *), void *data,
  60                                          scm_t_wind_flags);
  61
  62 SCM_API void scm_dynwind_unwind_handler_with_scm (void (*func) (SCM), SCM data,
  63                                                   scm_t_wind_flags);
  64 SCM_API void scm_dynwind_rewind_handler_with_scm (void (*func) (SCM), SCM data,
  65                                                   scm_t_wind_flags);
  66
  67 SCM_API void scm_dynwind_free (void *mem);
  68
  69 #ifdef GUILE_DEBUG
  70 SCM_API SCM scm_wind_chain (void);
  71 #endif /*GUILE_DEBUG*/
  72
  73 #endif  /* SCM_DYNWIND_H */
  74
  75 /*
  76   Local Variables:
  77   c-file-style: "gnu"
  78   End:
  79 */