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/* Copyright (C) 2001, 2009, 2010, 2011 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
*/
#ifndef _SCM_VM_H_
#define _SCM_VM_H_
#include <libguile.h>
#include <libguile/programs.h>
enum {
SCM_VM_APPLY_HOOK,
SCM_VM_PUSH_CONTINUATION_HOOK,
SCM_VM_POP_CONTINUATION_HOOK,
SCM_VM_NEXT_HOOK,
SCM_VM_ABORT_CONTINUATION_HOOK,
SCM_VM_RESTORE_CONTINUATION_HOOK,
SCM_VM_NUM_HOOKS,
};
struct scm_vm;
typedef SCM (*scm_t_vm_engine) (SCM vm, SCM program, SCM *argv, int nargs);
#define SCM_VM_REGULAR_ENGINE 0
#define SCM_VM_DEBUG_ENGINE 1
#define SCM_VM_NUM_ENGINES 2
struct scm_vm {
scm_t_uint8 *ip; /* instruction pointer */
SCM *sp; /* stack pointer */
SCM *fp; /* frame pointer */
size_t stack_size; /* stack size */
SCM *stack_base; /* stack base address */
SCM *stack_limit; /* stack limit address */
int engine; /* which vm engine we're using */
SCM hooks[SCM_VM_NUM_HOOKS]; /* hooks */
int trace_level; /* traces enabled if trace_level > 0 */
scm_t_int64 cookie; /* used to detect unrewindable continuations */
};
SCM_API SCM scm_the_vm_fluid;
#define SCM_VM_P(x) (SCM_HAS_TYP7 (x, scm_tc7_vm))
#define SCM_VM_DATA(vm) ((struct scm_vm *) SCM_CELL_WORD_1 (vm))
#define SCM_VALIDATE_VM(pos,x) SCM_MAKE_VALIDATE (pos, x, VM_P)
SCM_API SCM scm_the_vm (void);
SCM_API SCM scm_make_vm (void);
SCM_API SCM scm_the_vm (void);
SCM_API SCM scm_call_with_vm (SCM vm, SCM proc, SCM args);
SCM_API SCM scm_vm_p (SCM obj);
SCM_API SCM scm_vm_ip (SCM vm);
SCM_API SCM scm_vm_sp (SCM vm);
SCM_API SCM scm_vm_fp (SCM vm);
SCM_API SCM scm_vm_apply_hook (SCM vm);
SCM_API SCM scm_vm_push_continuation_hook (SCM vm);
SCM_API SCM scm_vm_pop_continuation_hook (SCM vm);
SCM_API SCM scm_vm_abort_continuation_hook (SCM vm);
SCM_API SCM scm_vm_restore_continuation_hook (SCM vm);
SCM_API SCM scm_vm_next_hook (SCM vm);
SCM_API SCM scm_vm_trace_level (SCM vm);
SCM_API SCM scm_set_vm_trace_level_x (SCM vm, SCM level);
SCM_API SCM scm_vm_engine (SCM vm);
SCM_API SCM scm_set_vm_engine_x (SCM vm, SCM engine);
SCM_API SCM scm_set_default_vm_engine_x (SCM engine);
SCM_API void scm_c_set_vm_engine_x (SCM vm, int engine);
SCM_API void scm_c_set_default_vm_engine_x (int engine);
#define SCM_F_VM_CONT_PARTIAL 0x1
#define SCM_F_VM_CONT_REWINDABLE 0x2
struct scm_vm_cont {
SCM *sp;
SCM *fp;
scm_t_uint8 *ra, *mvra;
scm_t_ptrdiff stack_size;
SCM *stack_base;
scm_t_ptrdiff reloc;
scm_t_uint32 flags;
};
#define SCM_VM_CONT_P(OBJ) (SCM_HAS_TYP7 (OBJ, scm_tc7_vm_cont))
#define SCM_VM_CONT_DATA(CONT) ((struct scm_vm_cont *) SCM_CELL_WORD_1 (CONT))
#define SCM_VM_CONT_PARTIAL_P(CONT) (SCM_VM_CONT_DATA (CONT)->flags & SCM_F_VM_CONT_PARTIAL)
#define SCM_VM_CONT_REWINDABLE_P(CONT) (SCM_VM_CONT_DATA (CONT)->flags & SCM_F_VM_CONT_REWINDABLE)
SCM_API SCM scm_load_compiled_with_vm (SCM file);
SCM_INTERNAL SCM scm_c_vm_run (SCM vm, SCM program, SCM *argv, int nargs);
SCM_INTERNAL void scm_i_vm_print (SCM x, SCM port,
scm_print_state *pstate);
SCM_INTERNAL SCM scm_i_vm_capture_continuation (SCM vm);
SCM_INTERNAL SCM scm_i_vm_capture_stack (SCM *stack_base, SCM *fp, SCM *sp,
scm_t_uint8 *ra, scm_t_uint8 *mvra,
scm_t_uint32 flags);
SCM_INTERNAL void scm_i_vm_cont_print (SCM x, SCM port,
scm_print_state *pstate);
SCM_INTERNAL void scm_bootstrap_vm (void);
SCM_INTERNAL void scm_init_vm (void);
#endif /* _SCM_VM_H_ */
/*
Local Variables:
c-file-style: "gnu"
End:
*/
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