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/*
* Copyright © 2016 Keith Packard <keithp@keithp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program 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
* General Public License for more details.
*/
#include <ao_lisp.h>
ao_poly
ao_lisp_save(struct ao_lisp_cons *cons)
{
#ifdef AO_LISP_SAVE
struct ao_lisp_os_save *os = (struct ao_lisp_os_save *) &ao_lisp_pool[AO_LISP_POOL];
ao_lisp_collect();
os->ao_lisp_atoms = ao_lisp_atom_poly(ao_lisp_atoms);
os->ao_lisp_globals = ao_lisp_frame_poly(ao_lisp_frame_global);
if (ao_lisp_os_save())
return _ao_lisp_atom_t;
#endif
return AO_LISP_NIL;
}
ao_poly
ao_lisp_restore(struct ao_lisp_cons *cons)
{
#ifdef AO_LISP_SAVE
struct ao_lisp_os_save *os = (struct ao_lisp_os_save *) &ao_lisp_pool[AO_LISP_POOL];
if (ao_lisp_os_restore()) {
ao_lisp_atoms = ao_lisp_poly_atom(os->ao_lisp_atoms);
ao_lisp_frame_global = ao_lisp_poly_frame(os->ao_lisp_globals);
/* Clear the eval global variabls */
ao_lisp_eval_clear_globals();
/* Reset the allocator */
ao_lisp_top = AO_LISP_POOL;
ao_lisp_collect();
/* Re-create the evaluator stack */
if (!ao_lisp_eval_restart())
return AO_LISP_NIL;
return _ao_lisp_atom_t;
}
#endif
return AO_LISP_NIL;
}
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