2 * Copyright © 2016 Keith Packard <keithp@keithp.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
18 ao_lisp_save(struct ao_lisp_cons *cons)
20 if (!ao_lisp_check_argc(_ao_lisp_atom_save, cons, 0, 0))
24 struct ao_lisp_os_save *os = (struct ao_lisp_os_save *) (void *) &ao_lisp_pool[AO_LISP_POOL];
26 ao_lisp_collect(AO_LISP_COLLECT_FULL);
27 os->atoms = ao_lisp_atom_poly(ao_lisp_atoms);
28 os->globals = ao_lisp_frame_poly(ao_lisp_frame_global);
29 os->const_checksum = ao_lisp_const_checksum;
30 os->const_checksum_inv = (uint16_t) ~ao_lisp_const_checksum;
32 if (ao_lisp_os_save())
33 return _ao_lisp_atom_t;
39 ao_lisp_restore(struct ao_lisp_cons *cons)
41 if (!ao_lisp_check_argc(_ao_lisp_atom_save, cons, 0, 0))
45 struct ao_lisp_os_save save;
46 struct ao_lisp_os_save *os = (struct ao_lisp_os_save *) (void *) &ao_lisp_pool[AO_LISP_POOL];
48 if (!ao_lisp_os_restore_save(&save, AO_LISP_POOL))
49 return ao_lisp_error(AO_LISP_INVALID, "header restore failed");
51 if (save.const_checksum != ao_lisp_const_checksum ||
52 save.const_checksum_inv != (uint16_t) ~ao_lisp_const_checksum)
54 return ao_lisp_error(AO_LISP_INVALID, "image is corrupted or stale");
57 if (ao_lisp_os_restore()) {
59 ao_lisp_atoms = ao_lisp_poly_atom(os->atoms);
60 ao_lisp_frame_global = ao_lisp_poly_frame(os->globals);
62 /* Clear the eval global variabls */
63 ao_lisp_eval_clear_globals();
65 /* Reset the allocator */
66 ao_lisp_top = AO_LISP_POOL;
67 ao_lisp_collect(AO_LISP_COLLECT_FULL);
69 /* Re-create the evaluator stack */
70 if (!ao_lisp_eval_restart())
72 return _ao_lisp_atom_t;