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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_scheme.h"
#ifdef AO_SCHEME_FEATURE_SAVE
ao_poly
ao_scheme_do_save(struct ao_scheme_cons *cons)
{
#ifndef AO_SCHEME_MAKE_CONST
struct ao_scheme_os_save *os;
if (!ao_scheme_parse_args(_ao_scheme_atom_save, cons,
AO_SCHEME_ARG_END))
return AO_SCHEME_NIL;
os = (struct ao_scheme_os_save *) (void *) &ao_scheme_pool[AO_SCHEME_POOL];
ao_scheme_collect(AO_SCHEME_COLLECT_FULL);
os->atoms = ao_scheme_atom_poly(ao_scheme_atoms);
os->globals = ao_scheme_frame_poly(ao_scheme_frame_global);
os->const_checksum = ao_scheme_const_checksum;
os->const_checksum_inv = (uint16_t) ~ao_scheme_const_checksum;
if (ao_scheme_os_save())
return _ao_scheme_bool_true;
#else
(void) cons;
#endif
return _ao_scheme_bool_false;
}
ao_poly
ao_scheme_do_restore(struct ao_scheme_cons *cons)
{
#ifndef AO_SCHEME_MAKE_CONST
struct ao_scheme_os_save save;
struct ao_scheme_os_save *os = (struct ao_scheme_os_save *) (void *) &ao_scheme_pool[AO_SCHEME_POOL];
if (!ao_scheme_parse_args(_ao_scheme_atom_restore, cons,
AO_SCHEME_ARG_END))
return AO_SCHEME_NIL;
os = (struct ao_scheme_os_save *) (void *) &ao_scheme_pool[AO_SCHEME_POOL];
if (!ao_scheme_os_restore_save(&save, AO_SCHEME_POOL))
return ao_scheme_error(AO_SCHEME_INVALID, "header restore failed");
if (save.const_checksum != ao_scheme_const_checksum ||
save.const_checksum_inv != (uint16_t) ~ao_scheme_const_checksum)
{
return ao_scheme_error(AO_SCHEME_INVALID, "image is corrupted or stale");
}
if (ao_scheme_os_restore()) {
ao_scheme_atoms = ao_scheme_poly_atom(os->atoms);
ao_scheme_frame_global = ao_scheme_poly_frame(os->globals);
/* Clear the eval global variabls */
ao_scheme_eval_clear_globals();
/* Reset the allocator */
ao_scheme_top = AO_SCHEME_POOL;
ao_scheme_collect(AO_SCHEME_COLLECT_FULL);
/* Re-create the evaluator stack */
if (!ao_scheme_eval_restart())
return _ao_scheme_bool_false;
return _ao_scheme_bool_true;
}
#else
(void) cons;
#endif
return _ao_scheme_bool_false;
}
#endif /* AO_SCHEME_FEATURE_SAVE */
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