libguile/vm.h

   1 /* Copyright (C) 2001, 2009, 2010, 2011, 2012, 2013, 2014 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_VM_H_
  20 #define _SCM_VM_H_
  21
  22 #include <libguile.h>
  23 #include <libguile/programs.h>
  24
  25 enum {
  26   SCM_VM_APPLY_HOOK,
  27   SCM_VM_PUSH_CONTINUATION_HOOK,
  28   SCM_VM_POP_CONTINUATION_HOOK,
  29   SCM_VM_NEXT_HOOK,
  30   SCM_VM_ABORT_CONTINUATION_HOOK,
  31   SCM_VM_NUM_HOOKS,
  32 };
  33
  34 #define SCM_VM_REGULAR_ENGINE 0
  35 #define SCM_VM_DEBUG_ENGINE 1
  36 #define SCM_VM_NUM_ENGINES 2
  37
  38 struct scm_vm {
  39   scm_t_uint32 *ip;             /* instruction pointer */
  40   SCM *sp;                      /* stack pointer */
  41   SCM *fp;                      /* frame pointer */
  42   SCM *stack_limit;             /* stack limit address */
  43   int trace_level;              /* traces enabled if trace_level > 0 */
  44   SCM *sp_max_since_gc;         /* highest sp since last gc */
  45   size_t stack_size;            /* stack size */
  46   SCM *stack_base;              /* stack base address */
  47   SCM overflow_handler_stack;   /* alist of max-stack-size -> thunk */
  48   SCM hooks[SCM_VM_NUM_HOOKS];  /* hooks */
  49   int engine;                   /* which vm engine we're using */
  50 };
  51
  52 SCM_INTERNAL struct scm_vm *scm_the_vm (void);
  53 SCM_API SCM scm_call_with_vm (SCM proc, SCM args);
  54
  55 SCM_API SCM scm_call_with_stack_overflow_handler (SCM limit, SCM thunk,
  56                                                   SCM handler);
  57
  58 SCM_API SCM scm_vm_apply_hook (void);
  59 SCM_API SCM scm_vm_push_continuation_hook (void);
  60 SCM_API SCM scm_vm_pop_continuation_hook (void);
  61 SCM_API SCM scm_vm_abort_continuation_hook (void);
  62 SCM_API SCM scm_vm_next_hook (void);
  63 SCM_API SCM scm_vm_trace_level (void);
  64 SCM_API SCM scm_set_vm_trace_level_x (SCM level);
  65 SCM_API SCM scm_vm_engine (void);
  66 SCM_API SCM scm_set_vm_engine_x (SCM engine);
  67 SCM_API SCM scm_set_default_vm_engine_x (SCM engine);
  68 SCM_API void scm_c_set_vm_engine_x (int engine);
  69 SCM_API void scm_c_set_default_vm_engine_x (int engine);
  70
  71 struct GC_ms_entry;
  72 SCM_INTERNAL struct GC_ms_entry * scm_i_vm_mark_stack (struct scm_vm *,
  73                                                        struct GC_ms_entry *,
  74                                                        struct GC_ms_entry *);
  75 SCM_INTERNAL void scm_i_vm_free_stack (struct scm_vm *vp);
  76
  77 #define SCM_F_VM_CONT_PARTIAL 0x1
  78 #define SCM_F_VM_CONT_REWINDABLE 0x2
  79
  80 struct scm_vm_cont {
  81   SCM *sp;
  82   SCM *fp;
  83   scm_t_uint32 *ra;
  84   scm_t_ptrdiff stack_size;
  85   SCM *stack_base;
  86   scm_t_ptrdiff reloc;
  87   scm_t_dynstack *dynstack;
  88   scm_t_uint32 flags;
  89 };
  90
  91 #define SCM_VM_CONT_P(OBJ)      (SCM_HAS_TYP7 (OBJ, scm_tc7_vm_cont))
  92 #define SCM_VM_CONT_DATA(CONT)  ((struct scm_vm_cont *) SCM_CELL_WORD_1 (CONT))
  93 #define SCM_VM_CONT_PARTIAL_P(CONT) (SCM_VM_CONT_DATA (CONT)->flags & SCM_F_VM_CONT_PARTIAL)
  94 #define SCM_VM_CONT_REWINDABLE_P(CONT) (SCM_VM_CONT_DATA (CONT)->flags & SCM_F_VM_CONT_REWINDABLE)
  95
  96 SCM_API SCM scm_load_compiled_with_vm (SCM file);
  97
  98 SCM_INTERNAL SCM scm_i_call_with_current_continuation (SCM proc);
  99 SCM_INTERNAL SCM scm_i_capture_current_stack (void);
 100 SCM_INTERNAL SCM scm_i_vm_capture_stack (SCM *stack_base, SCM *fp, SCM *sp,
 101                                          scm_t_uint32 *ra,
 102                                          scm_t_dynstack *dynstack,
 103                                          scm_t_uint32 flags);
 104 SCM_INTERNAL int scm_i_vm_cont_to_frame (SCM cont, struct scm_frame *frame);
 105 SCM_INTERNAL void scm_i_vm_cont_print (SCM x, SCM port,
 106                                        scm_print_state *pstate);
 107 SCM_INTERNAL void scm_bootstrap_vm (void);
 108 SCM_INTERNAL void scm_init_vm (void);
 109
 110 #endif /* _SCM_VM_H_ */
 111
 112 /*
 113   Local Variables:
 114   c-file-style: "gnu"
 115   End:
 116 */