libguile/control.h

   1 /* Copyright (C) 2010, 2011  Free Software Foundation, Inc.
   2  *
   3  * This library is free software; you can redistribute it and/or
   4  * modify it under the terms of the GNU Lesser General Public License
   5  * as published by the Free Software Foundation; either version 3 of
   6  * the License, or (at your option) any later version.
   7  *
   8  * This library is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * Lesser General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU Lesser General Public
  14  * License along with this library; if not, write to the Free Software
  15  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  16  * 02110-1301 USA
  17  */
  18
  19 #ifndef SCM_CONTROL_H
  20 #define SCM_CONTROL_H
  21
  22
  23 #define SCM_F_PROMPT_ESCAPE 0x1
  24
  25 #define SCM_PROMPT_P(x)         (!SCM_IMP (x) && SCM_TYP7(x) == scm_tc7_prompt)
  26 #define SCM_PROMPT_FLAGS(x)     (SCM_CELL_WORD ((x), 0) >> 8)
  27 #define SCM_PROMPT_ESCAPE_P(x)  (SCM_PROMPT_FLAGS (x) & SCM_F_PROMPT_ESCAPE)
  28 #define SCM_PROMPT_TAG(x)       (SCM_CELL_OBJECT ((x), 1))
  29 #define SCM_PROMPT_REGISTERS(x) ((struct scm_prompt_registers*)SCM_CELL_WORD ((x), 2))
  30 #define SCM_PROMPT_DYNWINDS(x)  (SCM_CELL_OBJECT ((x), 3))
  31
  32 #define SCM_PROMPT_SETJMP(p)    (SCM_I_SETJMP (SCM_PROMPT_REGISTERS (p)->regs))
  33
  34 struct scm_prompt_registers
  35 {
  36   scm_t_uint8 *ip;
  37   SCM *sp;
  38   SCM *fp;
  39   scm_t_int64 cookie;
  40   scm_i_jmp_buf regs;
  41 };
  42
  43
  44 SCM_INTERNAL SCM scm_c_make_prompt (SCM k, SCM *fp, SCM *sp,
  45                                     scm_t_uint8 *abort_ip,
  46                                     scm_t_uint8 escape_only_p,
  47                                     scm_t_int64 vm_cookie,
  48                                     SCM winds);
  49 SCM_INTERNAL SCM scm_i_prompt_pop_abort_args_x (SCM vm);
  50
  51 SCM_INTERNAL void scm_c_abort (SCM vm, SCM tag, size_t n, SCM *argv,
  52                                scm_t_int64 cookie) SCM_NORETURN;
  53 SCM_INTERNAL SCM scm_at_abort (SCM tag, SCM args) SCM_NORETURN;
  54
  55
  56 SCM_INTERNAL void scm_i_prompt_print (SCM exp, SCM port, scm_print_state *pstate);
  57 SCM_INTERNAL void scm_init_control (void);
  58
  59
  60 #endif /* SCM_CONTROL_H */