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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)
{
if (!ao_lisp_check_argc(_ao_lisp_atom_save, cons, 0, 0))
return AO_LISP_NIL;
#ifdef AO_LISP_SAVE
struct ao_lisp_os_save *os = (struct ao_lisp_os_save *) (void *) &ao_lisp_pool[AO_LISP_POOL];
ao_lisp_collect(AO_LISP_COLLECT_FULL);
os->atoms = ao_lisp_atom_poly(ao_lisp_atoms);
os->globals = ao_lisp_frame_poly(ao_lisp_frame_global);
os->const_checksum = ao_lisp_const_checksum;
os->const_checksum_inv = (uint16_t) ~ao_lisp_const_checksum;
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)
{
if (!ao_lisp_check_argc(_ao_lisp_atom_save, cons, 0, 0))
return AO_LISP_NIL;
#ifdef AO_LISP_SAVE
struct ao_lisp_os_save save;
struct ao_lisp_os_save *os = (struct ao_lisp_os_save *) (void *) &ao_lisp_pool[AO_LISP_POOL];
if (!ao_lisp_os_restore_save(&save, AO_LISP_POOL))
return ao_lisp_error(AO_LISP_INVALID, "header restore failed");
if (save.const_checksum != ao_lisp_const_checksum ||
save.const_checksum_inv != (uint16_t) ~ao_lisp_const_checksum)
{
return ao_lisp_error(AO_LISP_INVALID, "image is corrupted or stale");
}
if (ao_lisp_os_restore()) {
ao_lisp_atoms = ao_lisp_poly_atom(os->atoms);
ao_lisp_frame_global = ao_lisp_poly_frame(os->globals);
/* Clear the eval global variabls */
ao_lisp_eval_clear_globals();
/* Reset the allocator */
ao_lisp_top = AO_LISP_POOL;
ao_lisp_collect(AO_LISP_COLLECT_FULL);
/* 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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