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/* classes: h_files */
#ifndef SCM_ROOT_H
#define SCM_ROOT_H
/* Copyright (C) 1996,1998,2000,2001, 2002 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 2.1 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "libguile/__scm.h"
#include "libguile/debug.h"
#include "libguile/throw.h"
#define scm_flo0 scm_sys_protects[0]
#define scm_listofnull scm_sys_protects[1]
#define scm_nullvect scm_sys_protects[2]
#define scm_nullstr scm_sys_protects[3]
#define scm_keyword_obarray scm_sys_protects[4]
#define scm_stand_in_procs scm_sys_protects[5]
#define scm_object_whash scm_sys_protects[6]
#define scm_permobjs scm_sys_protects[7]
#define scm_asyncs scm_sys_protects[8]
#define scm_protects scm_sys_protects[9]
#define scm_properties_whash scm_sys_protects[10]
#define scm_gc_registered_roots scm_sys_protects[11]
#define scm_source_whash scm_sys_protects[12]
#define SCM_NUM_PROTECTS 13
SCM_API SCM scm_sys_protects[];
SCM_API scm_t_bits scm_tc16_root;
#define SCM_ROOTP(obj) SCM_SMOB_PREDICATE (scm_tc16_root, (obj))
#define SCM_ROOT_STATE(root) ((scm_root_state *) SCM_SMOB_DATA (root))
typedef struct scm_root_state
{
SCM_STACKITEM * stack_base;
jmp_buf save_regs_gc_mark;
int errjmp_bad;
SCM rootcont;
SCM dynwinds;
/* It is very inefficient to have this variable in the root state. */
scm_t_debug_frame *last_debug_frame;
SCM progargs; /* vestigial */
SCM exitval; /* vestigial */
SCM cur_inp;
SCM cur_outp;
SCM cur_errp;
SCM cur_loadp;
SCM fluids;
SCM handle; /* The root object for this root state */
SCM parent; /* The parent root object */
SCM active_asyncs; /* The thunks to be run at the next
safe point */
SCM signal_asyncs; /* The pre-queued cells for signal handlers.
*/
unsigned int block_asyncs; /* Non-zero means that asyncs should
not be run. */
unsigned int pending_asyncs; /* Non-zero means that asyncs might be pending.
*/
} scm_root_state;
#define scm_stack_base (scm_root->stack_base)
#define scm_save_regs_gc_mark (scm_root->save_regs_gc_mark)
#define scm_errjmp_bad (scm_root->errjmp_bad)
#define scm_rootcont (scm_root->rootcont)
#define scm_dynwinds (scm_root->dynwinds)
#define scm_progargs (scm_root->progargs)
#define scm_last_debug_frame (scm_root->last_debug_frame)
#define scm_exitval (scm_root->exitval)
#define scm_cur_inp (scm_root->cur_inp)
#define scm_cur_outp (scm_root->cur_outp)
#define scm_cur_errp (scm_root->cur_errp)
#define scm_cur_loadp (scm_root->cur_loadp)
#define scm_root ((scm_root_state *) SCM_THREAD_LOCAL_DATA)
#define scm_set_root(new_root) SCM_SET_THREAD_LOCAL_DATA (new_root)
SCM_API SCM scm_make_root (SCM parent);
SCM_API SCM scm_internal_cwdr (scm_t_catch_body body,
void *body_data,
scm_t_catch_handler handler,
void *handler_data,
SCM_STACKITEM *stack_start);
SCM_API SCM scm_call_with_dynamic_root (SCM thunk, SCM handler);
SCM_API SCM scm_dynamic_root (void);
SCM_API SCM scm_apply_with_dynamic_root (SCM proc, SCM a1, SCM args, SCM handler);
SCM_API void scm_init_root (void);
#endif /* SCM_ROOT_H */
/*
Local Variables:
c-file-style: "gnu"
End:
*/
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