libguile/vm.h

   1 /* Copyright (C) 2001, 2009, 2010 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_RESTORE_CONTINUATION_HOOK,
  32   SCM_VM_NUM_HOOKS,
  33 };
  34
  35 struct scm_vm;
  36
  37 typedef SCM (*scm_t_vm_engine) (SCM vm, SCM program, SCM *argv, int nargs);
  38
  39 #define SCM_VM_REGULAR_ENGINE 0
  40 #define SCM_VM_DEBUG_ENGINE 1
  41 #define SCM_VM_NUM_ENGINES 2
  42
  43 struct scm_vm {
  44   scm_t_uint8 *ip;              /* instruction pointer */
  45   SCM *sp;                      /* stack pointer */
  46   SCM *fp;                      /* frame pointer */
  47   size_t stack_size;            /* stack size */
  48   SCM *stack_base;              /* stack base address */
  49   SCM *stack_limit;             /* stack limit address */
  50   int engine;                   /* which vm engine we're using */
  51   SCM hooks[SCM_VM_NUM_HOOKS];  /* hooks */
  52   SCM options;                  /* options */
  53   int trace_level;              /* traces enabled if trace_level > 0 */
  54   scm_t_int64 cookie;           /* used to detect unrewindable continuations */
  55 };
  56
  57 SCM_API SCM scm_the_vm_fluid;
  58
  59 #define SCM_VM_P(x)             (SCM_NIMP (x) && SCM_TYP7 (x) == scm_tc7_vm)
  60 #define SCM_VM_DATA(vm)         ((struct scm_vm *) SCM_CELL_WORD_1 (vm))
  61 #define SCM_VALIDATE_VM(pos,x)  SCM_MAKE_VALIDATE (pos, x, VM_P)
  62
  63 SCM_API SCM scm_the_vm ();
  64 SCM_API SCM scm_make_vm (void);
  65 SCM_API SCM scm_vm_apply (SCM vm, SCM program, SCM args);
  66 SCM_API SCM scm_c_vm_run (SCM vm, SCM program, SCM *argv, int nargs);
  67 SCM_API SCM scm_vm_option_ref (SCM vm, SCM key);
  68 SCM_API SCM scm_vm_option_set_x (SCM vm, SCM key, SCM val);
  69
  70 SCM_API SCM scm_vm_version (void);
  71 SCM_API SCM scm_thread_vm (SCM t);
  72 SCM_API SCM scm_set_thread_vm_x (SCM t, SCM vm);
  73 SCM_API SCM scm_the_vm (void);
  74 SCM_API SCM scm_vm_p (SCM obj);
  75 SCM_API SCM scm_vm_ip (SCM vm);
  76 SCM_API SCM scm_vm_sp (SCM vm);
  77 SCM_API SCM scm_vm_fp (SCM vm);
  78 SCM_API SCM scm_vm_apply_hook (SCM vm);
  79 SCM_API SCM scm_vm_push_continuation_hook (SCM vm);
  80 SCM_API SCM scm_vm_pop_continuation_hook (SCM vm);
  81 SCM_API SCM scm_vm_abort_continuation_hook (SCM vm);
  82 SCM_API SCM scm_vm_restore_continuation_hook (SCM vm);
  83 SCM_API SCM scm_vm_next_hook (SCM vm);
  84 SCM_API SCM scm_vm_option (SCM vm, SCM key);
  85 SCM_API SCM scm_set_vm_option_x (SCM vm, SCM key, SCM val);
  86 SCM_API SCM scm_vm_trace_level (SCM vm);
  87 SCM_API SCM scm_set_vm_trace_level_x (SCM vm, SCM level);
  88
  89 #define SCM_F_VM_CONT_PARTIAL 0x1
  90 #define SCM_F_VM_CONT_REWINDABLE 0x2
  91
  92 struct scm_vm_cont {
  93   SCM *sp;
  94   SCM *fp;
  95   scm_t_uint8 *ra, *mvra;
  96   scm_t_ptrdiff stack_size;
  97   SCM *stack_base;
  98   scm_t_ptrdiff reloc;
  99   scm_t_uint32 flags;
 100 };
 101
 102 #define SCM_VM_CONT_P(OBJ)      (SCM_NIMP (OBJ) && SCM_TYP7 (OBJ) == scm_tc7_vm_cont)
 103 #define SCM_VM_CONT_DATA(CONT)  ((struct scm_vm_cont *) SCM_CELL_WORD_1 (CONT))
 104 #define SCM_VM_CONT_PARTIAL_P(CONT) (SCM_VM_CONT_DATA (CONT)->flags & SCM_F_VM_CONT_PARTIAL)
 105 #define SCM_VM_CONT_REWINDABLE_P(CONT) (SCM_VM_CONT_DATA (CONT)->flags & SCM_F_VM_CONT_REWINDABLE)
 106
 107 SCM_API SCM scm_load_compiled_with_vm (SCM file);
 108
 109 SCM_INTERNAL void scm_i_vm_print (SCM x, SCM port,
 110                                   scm_print_state *pstate);
 111 SCM_INTERNAL SCM scm_i_vm_capture_continuation (SCM vm);
 112 SCM_INTERNAL SCM scm_i_vm_capture_stack (SCM *stack_base, SCM *fp, SCM *sp,
 113                                          scm_t_uint8 *ra, scm_t_uint8 *mvra,
 114                                          scm_t_uint32 flags);
 115 SCM_INTERNAL void scm_i_vm_cont_print (SCM x, SCM port,
 116                                        scm_print_state *pstate);
 117 SCM_INTERNAL void scm_bootstrap_vm (void);
 118 SCM_INTERNAL void scm_init_vm (void);
 119
 120 #endif /* _SCM_VM_H_ */
 121
 122 /*
 123   Local Variables:
 124   c-file-style: "gnu"
 125   End:
 126 */